[PATCH v2 08/14] clk: rp1: Add support for clocks provided by RP1

From: Andrea della Porta
Date: Mon Oct 07 2024 - 08:42:54 EST

RaspberryPi RP1 is an MFD providing, among other peripherals, several
clock generators and PLLs that drives the sub-peripherals.
Add the driver to support the clock providers.

Signed-off-by: Andrea della Porta <andrea.porta@xxxxxxxx>
---
MAINTAINERS | 1 +
drivers/clk/Kconfig | 9 +
drivers/clk/Makefile | 1 +
drivers/clk/clk-rp1.c | 1658 +++++++++++++++++++++++++++++++++++++++++
4 files changed, 1669 insertions(+)
create mode 100644 drivers/clk/clk-rp1.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 2aea5a6166bd..dc064cd4b6b5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -19387,6 +19387,7 @@ F: Documentation/devicetree/bindings/clock/raspberrypi,rp1-clocks.yaml
F: Documentation/devicetree/bindings/misc/pci1de4,1.yaml
F: Documentation/devicetree/bindings/pci/pci-ep-bus.yaml
F: Documentation/devicetree/bindings/pinctrl/raspberrypi,rp1-gpio.yaml
+F: drivers/clk/clk-rp1.c
F: include/dt-bindings/clock/rp1.h
F: include/dt-bindings/misc/rp1.h

diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 299bc678ed1b..537019987f0c 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -88,6 +88,15 @@ config COMMON_CLK_RK808
These multi-function devices have two fixed-rate oscillators, clocked at 32KHz each.
Clkout1 is always on, Clkout2 can off by control register.

+config COMMON_CLK_RP1
+ tristate "Raspberry Pi RP1-based clock support"
+ depends on PCI || COMPILE_TEST
+ depends on COMMON_CLK
+ help
+ Enable common clock framework support for Raspberry Pi RP1.
+ This multi-function device has 3 main PLLs and several clock
+ generators to drive the internal sub-peripherals.
+
config COMMON_CLK_HI655X
tristate "Clock driver for Hi655x" if EXPERT
depends on (MFD_HI655X_PMIC || COMPILE_TEST)
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index fb8878a5d7d9..2ab97f36c800 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -68,6 +68,7 @@ obj-$(CONFIG_CLK_LS1028A_PLLDIG) += clk-plldig.o
obj-$(CONFIG_COMMON_CLK_PWM) += clk-pwm.o
obj-$(CONFIG_CLK_QORIQ) += clk-qoriq.o
obj-$(CONFIG_COMMON_CLK_RK808) += clk-rk808.o
+obj-$(CONFIG_COMMON_CLK_RP1) += clk-rp1.o
obj-$(CONFIG_COMMON_CLK_HI655X) += clk-hi655x.o
obj-$(CONFIG_COMMON_CLK_S2MPS11) += clk-s2mps11.o
obj-$(CONFIG_COMMON_CLK_SCMI) += clk-scmi.o
diff --git a/drivers/clk/clk-rp1.c b/drivers/clk/clk-rp1.c
new file mode 100644
index 000000000000..9016666fb27d
--- /dev/null
+++ b/drivers/clk/clk-rp1.c
@@ -0,0 +1,1658 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2023 Raspberry Pi Ltd.
+ *
+ * Clock driver for RP1 PCIe multifunction chip.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/clkdev.h>
+#include <linux/clk.h>
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/math64.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <asm/div64.h>
+
+#include <dt-bindings/clock/raspberrypi,rp1-clocks.h>
+
+#define PLL_SYS_OFFSET 0x08000
+#define PLL_SYS_CS (PLL_SYS_OFFSET + 0x00)
+#define PLL_SYS_PWR (PLL_SYS_OFFSET + 0x04)
+#define PLL_SYS_FBDIV_INT (PLL_SYS_OFFSET + 0x08)
+#define PLL_SYS_FBDIV_FRAC (PLL_SYS_OFFSET + 0x0c)
+#define PLL_SYS_PRIM (PLL_SYS_OFFSET + 0x10)
+#define PLL_SYS_SEC (PLL_SYS_OFFSET + 0x14)
+
+#define PLL_AUDIO_OFFSET 0x0c000
+#define PLL_AUDIO_CS (PLL_AUDIO_OFFSET + 0x00)
+#define PLL_AUDIO_PWR (PLL_AUDIO_OFFSET + 0x04)
+#define PLL_AUDIO_FBDIV_INT (PLL_AUDIO_OFFSET + 0x08)
+#define PLL_AUDIO_FBDIV_FRAC (PLL_AUDIO_OFFSET + 0x0c)
+#define PLL_AUDIO_PRIM (PLL_AUDIO_OFFSET + 0x10)
+#define PLL_AUDIO_SEC (PLL_AUDIO_OFFSET + 0x14)
+#define PLL_AUDIO_TERN (PLL_AUDIO_OFFSET + 0x18)
+
+#define PLL_VIDEO_OFFSET 0x10000
+#define PLL_VIDEO_CS (PLL_VIDEO_OFFSET + 0x00)
+#define PLL_VIDEO_PWR (PLL_VIDEO_OFFSET + 0x04)
+#define PLL_VIDEO_FBDIV_INT (PLL_VIDEO_OFFSET + 0x08)
+#define PLL_VIDEO_FBDIV_FRAC (PLL_VIDEO_OFFSET + 0x0c)
+#define PLL_VIDEO_PRIM (PLL_VIDEO_OFFSET + 0x10)
+#define PLL_VIDEO_SEC (PLL_VIDEO_OFFSET + 0x14)
+
+#define GPCLK_OE_CTRL 0x00000
+
+#define CLK_SYS_OFFSET 0x00014
+#define CLK_SYS_CTRL (CLK_SYS_OFFSET + 0x00)
+#define CLK_SYS_DIV_INT (CLK_SYS_OFFSET + 0x04)
+#define CLK_SYS_SEL (CLK_SYS_OFFSET + 0x0c)
+
+#define CLK_SLOW_OFFSET 0x00024
+#define CLK_SLOW_SYS_CTRL (CLK_SLOW_OFFSET + 0x00)
+#define CLK_SLOW_SYS_DIV_INT (CLK_SLOW_OFFSET + 0x04)
+#define CLK_SLOW_SYS_SEL (CLK_SLOW_OFFSET + 0x0c)
+
+#define CLK_DMA_OFFSET 0x00044
+#define CLK_DMA_CTRL (CLK_DMA_OFFSET + 0x00)
+#define CLK_DMA_DIV_INT (CLK_DMA_OFFSET + 0x04)
+#define CLK_DMA_SEL (CLK_DMA_OFFSET + 0x0c)
+
+#define CLK_UART_OFFSET 0x00054
+#define CLK_UART_CTRL (CLK_UART_OFFSET + 0x00)
+#define CLK_UART_DIV_INT (CLK_UART_OFFSET + 0x04)
+#define CLK_UART_SEL (CLK_UART_OFFSET + 0x0c)
+
+#define CLK_ETH_OFFSET 0x00064
+#define CLK_ETH_CTRL (CLK_ETH_OFFSET + 0x00)
+#define CLK_ETH_DIV_INT (CLK_ETH_OFFSET + 0x04)
+#define CLK_ETH_SEL (CLK_ETH_OFFSET + 0x0c)
+
+#define CLK_PWM0_OFFSET 0x00074
+#define CLK_PWM0_CTRL (CLK_PWM0_OFFSET + 0x00)
+#define CLK_PWM0_DIV_INT (CLK_PWM0_OFFSET + 0x04)
+#define CLK_PWM0_DIV_FRAC (CLK_PWM0_OFFSET + 0x08)
+#define CLK_PWM0_SEL (CLK_PWM0_OFFSET + 0x0c)
+
+#define CLK_PWM1_OFFSET 0x00084
+#define CLK_PWM1_CTRL (CLK_PWM1_OFFSET + 0x00)
+#define CLK_PWM1_DIV_INT (CLK_PWM1_OFFSET + 0x04)
+#define CLK_PWM1_DIV_FRAC (CLK_PWM1_OFFSET + 0x08)
+#define CLK_PWM1_SEL (CLK_PWM1_OFFSET + 0x0c)
+
+#define CLK_AUDIO_IN_OFFSET 0x00094
+#define CLK_AUDIO_IN_CTRL (CLK_AUDIO_IN_OFFSET + 0x00)
+#define CLK_AUDIO_IN_DIV_INT (CLK_AUDIO_IN_OFFSET + 0x04)
+#define CLK_AUDIO_IN_SEL (CLK_AUDIO_IN_OFFSET + 0x0c)
+
+#define CLK_AUDIO_OUT_OFFSET 0x000a4
+#define CLK_AUDIO_OUT_CTRL (CLK_AUDIO_OUT_OFFSET + 0x00)
+#define CLK_AUDIO_OUT_DIV_INT (CLK_AUDIO_OUT_OFFSET + 0x04)
+#define CLK_AUDIO_OUT_SEL (CLK_AUDIO_OUT_OFFSET + 0x0c)
+
+#define CLK_I2S_OFFSET 0x000b4
+#define CLK_I2S_CTRL (CLK_I2S_OFFSET + 0x00)
+#define CLK_I2S_DIV_INT (CLK_I2S_OFFSET + 0x04)
+#define CLK_I2S_SEL (CLK_I2S_OFFSET + 0x0c)
+
+#define CLK_MIPI0_CFG_OFFSET 0x000c4
+#define CLK_MIPI0_CFG_CTRL (CLK_MIPI0_CFG_OFFSET + 0x00)
+#define CLK_MIPI0_CFG_DIV_INT (CLK_MIPI0_CFG_OFFSET + 0x04)
+#define CLK_MIPI0_CFG_SEL (CLK_MIPI0_CFG_OFFSET + 0x0c)
+
+#define CLK_MIPI1_CFG_OFFSET 0x000d4
+#define CLK_MIPI1_CFG_CTRL (CLK_MIPI1_CFG_OFFSET + 0x00)
+#define CLK_MIPI1_CFG_DIV_INT (CLK_MIPI1_CFG_OFFSET + 0x04)
+#define CLK_MIPI1_CFG_SEL (CLK_MIPI1_CFG_OFFSET + 0x0c)
+
+#define CLK_PCIE_AUX_OFFSET 0x000e4
+#define CLK_PCIE_AUX_CTRL (CLK_PCIE_AUX_OFFSET + 0x00)
+#define CLK_PCIE_AUX_DIV_INT (CLK_PCIE_AUX_OFFSET + 0x04)
+#define CLK_PCIE_AUX_SEL (CLK_PCIE_AUX_OFFSET + 0x0c)
+
+#define CLK_USBH0_MICROFRAME_OFFSET 0x000f4
+#define CLK_USBH0_MICROFRAME_CTRL (CLK_USBH0_MICROFRAME_OFFSET + 0x00)
+#define CLK_USBH0_MICROFRAME_DIV_INT (CLK_USBH0_MICROFRAME_OFFSET + 0x04)
+#define CLK_USBH0_MICROFRAME_SEL (CLK_USBH0_MICROFRAME_OFFSET + 0x0c)
+
+#define CLK_USBH1_MICROFRAME_OFFSET 0x00104
+#define CLK_USBH1_MICROFRAME_CTRL (CLK_USBH1_MICROFRAME_OFFSET + 0x00)
+#define CLK_USBH1_MICROFRAME_DIV_INT (CLK_USBH1_MICROFRAME_OFFSET + 0x04)
+#define CLK_USBH1_MICROFRAME_SEL (CLK_USBH1_MICROFRAME_OFFSET + 0x0c)
+
+#define CLK_USBH0_SUSPEND_OFFSET 0x00114
+#define CLK_USBH0_SUSPEND_CTRL (CLK_USBH0_SUSPEND_OFFSET + 0x00)
+#define CLK_USBH0_SUSPEND_DIV_INT (CLK_USBH0_SUSPEND_OFFSET + 0x04)
+#define CLK_USBH0_SUSPEND_SEL (CLK_USBH0_SUSPEND_OFFSET + 0x0c)
+
+#define CLK_USBH1_SUSPEND_OFFSET 0x00124
+#define CLK_USBH1_SUSPEND_CTRL (CLK_USBH1_SUSPEND_OFFSET + 0x00)
+#define CLK_USBH1_SUSPEND_DIV_INT (CLK_USBH1_SUSPEND_OFFSET + 0x04)
+#define CLK_USBH1_SUSPEND_SEL (CLK_USBH1_SUSPEND_OFFSET + 0x0c)
+
+#define CLK_ETH_TSU_OFFSET 0x00134
+#define CLK_ETH_TSU_CTRL (CLK_ETH_TSU_OFFSET + 0x00)
+#define CLK_ETH_TSU_DIV_INT (CLK_ETH_TSU_OFFSET + 0x04)
+#define CLK_ETH_TSU_SEL (CLK_ETH_TSU_OFFSET + 0x0c)
+
+#define CLK_ADC_OFFSET 0x00144
+#define CLK_ADC_CTRL (CLK_ADC_OFFSET + 0x00)
+#define CLK_ADC_DIV_INT (CLK_ADC_OFFSET + 0x04)
+#define CLK_ADC_SEL (CLK_ADC_OFFSET + 0x0c)
+
+#define CLK_SDIO_TIMER_OFFSET 0x00154
+#define CLK_SDIO_TIMER_CTRL (CLK_SDIO_TIMER_OFFSET + 0x00)
+#define CLK_SDIO_TIMER_DIV_INT (CLK_SDIO_TIMER_OFFSET + 0x04)
+#define CLK_SDIO_TIMER_SEL (CLK_SDIO_TIMER_OFFSET + 0x0c)
+
+#define CLK_SDIO_ALT_SRC_OFFSET 0x00164
+#define CLK_SDIO_ALT_SRC_CTRL (CLK_SDIO_ALT_SRC_OFFSET + 0x00)
+#define CLK_SDIO_ALT_SRC_DIV_INT (CLK_SDIO_ALT_SRC_OFFSET + 0x04)
+#define CLK_SDIO_ALT_SRC_SEL (CLK_SDIO_ALT_SRC_OFFSET + 0x0c)
+
+#define CLK_GP0_OFFSET 0x00174
+#define CLK_GP0_CTRL (CLK_GP0_OFFSET + 0x00)
+#define CLK_GP0_DIV_INT (CLK_GP0_OFFSET + 0x04)
+#define CLK_GP0_DIV_FRAC (CLK_GP0_OFFSET + 0x08)
+#define CLK_GP0_SEL (CLK_GP0_OFFSET + 0x0c)
+
+#define CLK_GP1_OFFSET 0x00184
+#define CLK_GP1_CTRL (CLK_GP1_OFFSET + 0x00)
+#define CLK_GP1_DIV_INT (CLK_GP1_OFFSET + 0x04)
+#define CLK_GP1_DIV_FRAC (CLK_GP1_OFFSET + 0x08)
+#define CLK_GP1_SEL (CLK_GP1_OFFSET + 0x0c)
+
+#define CLK_GP2_OFFSET 0x00194
+#define CLK_GP2_CTRL (CLK_GP2_OFFSET + 0x00)
+#define CLK_GP2_DIV_INT (CLK_GP2_OFFSET + 0x04)
+#define CLK_GP2_DIV_FRAC (CLK_GP2_OFFSET + 0x08)
+#define CLK_GP2_SEL (CLK_GP2_OFFSET + 0x0c)
+
+#define CLK_GP3_OFFSET 0x001a4
+#define CLK_GP3_CTRL (CLK_GP3_OFFSET + 0x00)
+#define CLK_GP3_DIV_INT (CLK_GP3_OFFSET + 0x04)
+#define CLK_GP3_DIV_FRAC (CLK_GP3_OFFSET + 0x08)
+#define CLK_GP3_SEL (CLK_GP3_OFFSET + 0x0c)
+
+#define CLK_GP4_OFFSET 0x001b4
+#define CLK_GP4_CTRL (CLK_GP4_OFFSET + 0x00)
+#define CLK_GP4_DIV_INT (CLK_GP4_OFFSET + 0x04)
+#define CLK_GP4_DIV_FRAC (CLK_GP4_OFFSET + 0x08)
+#define CLK_GP4_SEL (CLK_GP4_OFFSET + 0x0c)
+
+#define CLK_GP5_OFFSET 0x001c4
+#define CLK_GP5_CTRL (CLK_GP5_OFFSET + 0x00)
+#define CLK_GP5_DIV_INT (CLK_GP5_OFFSET + 0x04)
+#define CLK_GP5_DIV_FRAC (CLK_GP5_OFFSET + 0x08)
+#define CLK_GP5_SEL (CLK_GP5_OFFSET + 0x0c)
+
+#define CLK_SYS_RESUS_CTRL 0x0020c
+
+#define CLK_SLOW_SYS_RESUS_CTRL 0x00214
+
+#define FC0_OFFSET 0x0021c
+#define FC0_REF_KHZ (FC0_OFFSET + 0x00)
+#define FC0_MIN_KHZ (FC0_OFFSET + 0x04)
+#define FC0_MAX_KHZ (FC0_OFFSET + 0x08)
+#define FC0_DELAY (FC0_OFFSET + 0x0c)
+#define FC0_INTERVAL (FC0_OFFSET + 0x10)
+#define FC0_SRC (FC0_OFFSET + 0x14)
+#define FC0_STATUS (FC0_OFFSET + 0x18)
+#define FC0_RESULT (FC0_OFFSET + 0x1c)
+#define FC_SIZE 0x20
+#define FC_COUNT 8
+#define FC_NUM(idx, off) ((idx) * 32 + (off))
+
+#define AUX_SEL 1
+
+#define VIDEO_CLOCKS_OFFSET 0x4000
+#define VIDEO_CLK_VEC_CTRL (VIDEO_CLOCKS_OFFSET + 0x0000)
+#define VIDEO_CLK_VEC_DIV_INT (VIDEO_CLOCKS_OFFSET + 0x0004)
+#define VIDEO_CLK_VEC_SEL (VIDEO_CLOCKS_OFFSET + 0x000c)
+#define VIDEO_CLK_DPI_CTRL (VIDEO_CLOCKS_OFFSET + 0x0010)
+#define VIDEO_CLK_DPI_DIV_INT (VIDEO_CLOCKS_OFFSET + 0x0014)
+#define VIDEO_CLK_DPI_SEL (VIDEO_CLOCKS_OFFSET + 0x001c)
+#define VIDEO_CLK_MIPI0_DPI_CTRL (VIDEO_CLOCKS_OFFSET + 0x0020)
+#define VIDEO_CLK_MIPI0_DPI_DIV_INT (VIDEO_CLOCKS_OFFSET + 0x0024)
+#define VIDEO_CLK_MIPI0_DPI_DIV_FRAC (VIDEO_CLOCKS_OFFSET + 0x0028)
+#define VIDEO_CLK_MIPI0_DPI_SEL (VIDEO_CLOCKS_OFFSET + 0x002c)
+#define VIDEO_CLK_MIPI1_DPI_CTRL (VIDEO_CLOCKS_OFFSET + 0x0030)
+#define VIDEO_CLK_MIPI1_DPI_DIV_INT (VIDEO_CLOCKS_OFFSET + 0x0034)
+#define VIDEO_CLK_MIPI1_DPI_DIV_FRAC (VIDEO_CLOCKS_OFFSET + 0x0038)
+#define VIDEO_CLK_MIPI1_DPI_SEL (VIDEO_CLOCKS_OFFSET + 0x003c)
+
+#define DIV_INT_8BIT_MAX GENMASK(7, 0) /* max divide for most clocks */
+#define DIV_INT_16BIT_MAX GENMASK(15, 0) /* max divide for GPx, PWM */
+#define DIV_INT_24BIT_MAX GENMASK(23, 0) /* max divide for CLK_SYS */
+
+#define FC0_STATUS_DONE BIT(4)
+#define FC0_STATUS_RUNNING BIT(8)
+#define FC0_RESULT_FRAC_SHIFT 5
+
+#define PLL_PRIM_DIV1_SHIFT 16
+#define PLL_PRIM_DIV1_WIDTH 3
+#define PLL_PRIM_DIV1_MASK GENMASK(PLL_PRIM_DIV1_SHIFT + \
+ PLL_PRIM_DIV1_WIDTH - 1, \
+ PLL_PRIM_DIV1_SHIFT)
+#define PLL_PRIM_DIV2_SHIFT 12
+#define PLL_PRIM_DIV2_WIDTH 3
+#define PLL_PRIM_DIV2_MASK GENMASK(PLL_PRIM_DIV2_SHIFT + \
+ PLL_PRIM_DIV2_WIDTH - 1, \
+ PLL_PRIM_DIV2_SHIFT)
+
+#define PLL_SEC_DIV_SHIFT 8
+#define PLL_SEC_DIV_WIDTH 5
+#define PLL_SEC_DIV_MASK GENMASK(PLL_SEC_DIV_SHIFT + \
+ PLL_SEC_DIV_WIDTH - 1, \
+ PLL_SEC_DIV_SHIFT)
+
+#define PLL_CS_LOCK BIT(31)
+#define PLL_CS_REFDIV_SHIFT 0
+
+#define PLL_PWR_PD BIT(0)
+#define PLL_PWR_DACPD BIT(1)
+#define PLL_PWR_DSMPD BIT(2)
+#define PLL_PWR_POSTDIVPD BIT(3)
+#define PLL_PWR_4PHASEPD BIT(4)
+#define PLL_PWR_VCOPD BIT(5)
+#define PLL_PWR_MASK GENMASK(5, 0)
+
+#define PLL_SEC_RST BIT(16)
+#define PLL_SEC_IMPL BIT(31)
+
+/* PLL phase output for both PRI and SEC */
+#define PLL_PH_EN BIT(4)
+#define PLL_PH_PHASE_SHIFT 0
+
+#define RP1_PLL_PHASE_0 0
+#define RP1_PLL_PHASE_90 1
+#define RP1_PLL_PHASE_180 2
+#define RP1_PLL_PHASE_270 3
+
+/* Clock fields for all clocks */
+#define CLK_CTRL_ENABLE BIT(11)
+#define CLK_CTRL_AUXSRC_SHIFT 5
+#define CLK_CTRL_AUXSRC_WIDTH 5
+#define CLK_CTRL_AUXSRC_MASK GENMASK(CLK_CTRL_AUXSRC_SHIFT + \
+ CLK_CTRL_AUXSRC_WIDTH - 1, \
+ CLK_CTRL_AUXSRC_SHIFT)
+#define CLK_CTRL_SRC_SHIFT 0
+#define CLK_DIV_FRAC_BITS 16
+
+#define KHz 1000
+#define MHz (KHz * KHz)
+#define LOCK_TIMEOUT_NS 100000000
+#define FC_TIMEOUT_NS 100000000
+
+#define MAX_CLK_PARENTS 16
+
+/*
+ * Secondary PLL channel output divider table.
+ * Divider values range from 8 to 19.
+ * Invalid values default to 19
+ */
+static const struct clk_div_table pll_sec_div_table[] = {
+ { 0x00, 19 },
+ { 0x01, 19 },
+ { 0x02, 19 },
+ { 0x03, 19 },
+ { 0x04, 19 },
+ { 0x05, 19 },
+ { 0x06, 19 },
+ { 0x07, 19 },
+ { 0x08, 8 },
+ { 0x09, 9 },
+ { 0x0a, 10 },
+ { 0x0b, 11 },
+ { 0x0c, 12 },
+ { 0x0d, 13 },
+ { 0x0e, 14 },
+ { 0x0f, 15 },
+ { 0x10, 16 },
+ { 0x11, 17 },
+ { 0x12, 18 },
+ { 0x13, 19 },
+ { 0x14, 19 },
+ { 0x15, 19 },
+ { 0x16, 19 },
+ { 0x17, 19 },
+ { 0x18, 19 },
+ { 0x19, 19 },
+ { 0x1a, 19 },
+ { 0x1b, 19 },
+ { 0x1c, 19 },
+ { 0x1d, 19 },
+ { 0x1e, 19 },
+ { 0x1f, 19 },
+ { 0 }
+};
+
+struct rp1_clockman {
+ struct device *dev;
+ void __iomem *regs;
+ spinlock_t regs_lock; /* spinlock for all clocks */
+ struct clk_hw *hw_xosc; /* reference clock */
+
+ /* Must be last */
+ struct clk_hw_onecell_data onecell;
+};
+
+struct rp1_pll_core_data {
+ const char *name;
+ u32 cs_reg;
+ u32 pwr_reg;
+ u32 fbdiv_int_reg;
+ u32 fbdiv_frac_reg;
+ unsigned long flags;
+ u32 fc0_src;
+};
+
+struct rp1_pll_data {
+ const char *name;
+ const char *source_pll;
+ u32 ctrl_reg;
+ unsigned long flags;
+ u32 fc0_src;
+};
+
+struct rp1_pll_ph_data {
+ const char *name;
+ const char *source_pll;
+ unsigned int phase;
+ unsigned int fixed_divider;
+ u32 ph_reg;
+ unsigned long flags;
+ u32 fc0_src;
+};
+
+struct rp1_pll_divider_data {
+ const char *name;
+ const char *source_pll;
+ u32 sec_reg;
+ unsigned long flags;
+ u32 fc0_src;
+};
+
+struct rp1_clock_data {
+ const char *name;
+ const char *const parents[MAX_CLK_PARENTS];
+ int num_std_parents;
+ int num_aux_parents;
+ unsigned long flags;
+ u32 oe_mask;
+ u32 clk_src_mask;
+ u32 ctrl_reg;
+ u32 div_int_reg;
+ u32 div_frac_reg;
+ u32 sel_reg;
+ u32 div_int_max;
+ unsigned long max_freq;
+ u32 fc0_src;
+};
+
+struct rp1_pll_core {
+ struct clk_hw hw;
+ struct rp1_clockman *clockman;
+ unsigned long cached_rate;
+ const struct rp1_pll_core_data *data;
+};
+
+struct rp1_pll {
+ struct clk_hw hw;
+ struct rp1_clockman *clockman;
+ struct clk_divider div;
+ unsigned long cached_rate;
+ const struct rp1_pll_data *data;
+};
+
+struct rp1_pll_ph {
+ struct clk_hw hw;
+ struct rp1_clockman *clockman;
+ const struct rp1_pll_ph_data *data;
+};
+
+struct rp1_clock {
+ struct clk_hw hw;
+ struct rp1_clockman *clockman;
+ unsigned long cached_rate;
+ const struct rp1_clock_data *data;
+};
+
+struct rp1_clk_change {
+ struct clk_hw *hw;
+ unsigned long new_rate;
+};
+
+struct rp1_clk_desc {
+ struct clk_hw *(*clk_register)(struct rp1_clockman *clockman,
+ const void *data);
+ const void *data;
+};
+
+static void rp1_debugfs_regset(struct rp1_clockman *clockman, u32 base,
+ const struct debugfs_reg32 *regs,
+ size_t nregs, struct dentry *dentry)
+{
+ struct debugfs_regset32 *regset;
+
+ regset = devm_kzalloc(clockman->dev, sizeof(*regset), GFP_KERNEL);
+ if (!regset)
+ return;
+
+ regset->regs = regs;
+ regset->nregs = nregs;
+ regset->base = clockman->regs + base;
+
+ debugfs_create_regset32("regdump", 0444, dentry, regset);
+}
+
+static inline u32 set_register_field(u32 reg, u32 val, u32 mask, u32 shift)
+{
+ reg &= ~mask;
+ reg |= (val << shift) & mask;
+ return reg;
+}
+
+static inline
+void clockman_write(struct rp1_clockman *clockman, u32 reg, u32 val)
+{
+ writel(val, clockman->regs + reg);
+}
+
+static inline u32 clockman_read(struct rp1_clockman *clockman, u32 reg)
+{
+ return readl(clockman->regs + reg);
+}
+
+static int rp1_pll_core_is_on(struct clk_hw *hw)
+{
+ struct rp1_pll_core *pll_core = container_of(hw, struct rp1_pll_core, hw);
+ struct rp1_clockman *clockman = pll_core->clockman;
+ const struct rp1_pll_core_data *data = pll_core->data;
+ u32 pwr = clockman_read(clockman, data->pwr_reg);
+
+ return (pwr & PLL_PWR_PD) || (pwr & PLL_PWR_POSTDIVPD);
+}
+
+static int rp1_pll_core_on(struct clk_hw *hw)
+{
+ struct rp1_pll_core *pll_core = container_of(hw, struct rp1_pll_core, hw);
+ struct rp1_clockman *clockman = pll_core->clockman;
+ const struct rp1_pll_core_data *data = pll_core->data;
+ u32 fbdiv_frac;
+ ktime_t timeout;
+
+ spin_lock(&clockman->regs_lock);
+
+ if (!(clockman_read(clockman, data->cs_reg) & PLL_CS_LOCK)) {
+ /* Reset to a known state. */
+ clockman_write(clockman, data->pwr_reg, PLL_PWR_MASK);
+ clockman_write(clockman, data->fbdiv_int_reg, 20);
+ clockman_write(clockman, data->fbdiv_frac_reg, 0);
+ clockman_write(clockman, data->cs_reg, 1 << PLL_CS_REFDIV_SHIFT);
+ }
+
+ /* Come out of reset. */
+ fbdiv_frac = clockman_read(clockman, data->fbdiv_frac_reg);
+ clockman_write(clockman, data->pwr_reg, fbdiv_frac ? 0 : PLL_PWR_DSMPD);
+ spin_unlock(&clockman->regs_lock);
+
+ /* Wait for the PLL to lock. */
+ timeout = ktime_add_ns(ktime_get(), LOCK_TIMEOUT_NS);
+ while (!(clockman_read(clockman, data->cs_reg) & PLL_CS_LOCK)) {
+ if (ktime_after(ktime_get(), timeout)) {
+ dev_err(clockman->dev, "%s: can't lock PLL\n",
+ clk_hw_get_name(hw));
+ return -ETIMEDOUT;
+ }
+ cpu_relax();
+ }
+
+ return 0;
+}
+
+static void rp1_pll_core_off(struct clk_hw *hw)
+{
+ struct rp1_pll_core *pll_core = container_of(hw, struct rp1_pll_core, hw);
+ struct rp1_clockman *clockman = pll_core->clockman;
+ const struct rp1_pll_core_data *data = pll_core->data;
+
+ spin_lock(&clockman->regs_lock);
+ clockman_write(clockman, data->pwr_reg, 0);
+ spin_unlock(&clockman->regs_lock);
+}
+
+static inline unsigned long get_pll_core_divider(struct clk_hw *hw,
+ unsigned long rate,
+ unsigned long parent_rate,
+ u32 *div_int, u32 *div_frac)
+{
+ unsigned long calc_rate;
+ u32 fbdiv_int, fbdiv_frac;
+ u64 div_fp64; /* 32.32 fixed point fraction. */
+
+ /* Factor of reference clock to VCO frequency. */
+ div_fp64 = (u64)(rate) << 32;
+ div_fp64 = DIV_ROUND_CLOSEST_ULL(div_fp64, parent_rate);
+
+ /* Round the fractional component at 24 bits. */
+ div_fp64 += 1 << (32 - 24 - 1);
+
+ fbdiv_int = div_fp64 >> 32;
+ fbdiv_frac = (div_fp64 >> (32 - 24)) & 0xffffff;
+
+ calc_rate =
+ ((u64)parent_rate * (((u64)fbdiv_int << 24) + fbdiv_frac) + (1 << 23)) >> 24;
+
+ *div_int = fbdiv_int;
+ *div_frac = fbdiv_frac;
+
+ return calc_rate;
+}
+
+static int rp1_pll_core_set_rate(struct clk_hw *hw,
+ unsigned long rate, unsigned long parent_rate)
+{
+ struct rp1_pll_core *pll_core = container_of(hw, struct rp1_pll_core, hw);
+ struct rp1_clockman *clockman = pll_core->clockman;
+ const struct rp1_pll_core_data *data = pll_core->data;
+ unsigned long calc_rate;
+ u32 fbdiv_int, fbdiv_frac;
+
+ /* Disable dividers to start with. */
+ spin_lock(&clockman->regs_lock);
+ clockman_write(clockman, data->fbdiv_int_reg, 0);
+ clockman_write(clockman, data->fbdiv_frac_reg, 0);
+ spin_unlock(&clockman->regs_lock);
+
+ calc_rate = get_pll_core_divider(hw, rate, parent_rate,
+ &fbdiv_int, &fbdiv_frac);
+
+ spin_lock(&clockman->regs_lock);
+ clockman_write(clockman, data->pwr_reg, fbdiv_frac ? 0 : PLL_PWR_DSMPD);
+ clockman_write(clockman, data->fbdiv_int_reg, fbdiv_int);
+ clockman_write(clockman, data->fbdiv_frac_reg, fbdiv_frac);
+ spin_unlock(&clockman->regs_lock);
+
+ /* Check that reference frequency is no greater than VCO / 16. */
+ if (WARN_ON_ONCE(parent_rate > (rate / 16)))
+ return -ERANGE;
+
+ pll_core->cached_rate = calc_rate;
+
+ spin_lock(&clockman->regs_lock);
+ /* Don't need to divide ref unless parent_rate > (output freq / 16) */
+ clockman_write(clockman, data->cs_reg,
+ clockman_read(clockman, data->cs_reg) |
+ (1 << PLL_CS_REFDIV_SHIFT));
+ spin_unlock(&clockman->regs_lock);
+
+ return 0;
+}
+
+static unsigned long rp1_pll_core_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct rp1_pll_core *pll_core = container_of(hw, struct rp1_pll_core, hw);
+ struct rp1_clockman *clockman = pll_core->clockman;
+ const struct rp1_pll_core_data *data = pll_core->data;
+ u32 fbdiv_int, fbdiv_frac;
+ unsigned long calc_rate;
+
+ fbdiv_int = clockman_read(clockman, data->fbdiv_int_reg);
+ fbdiv_frac = clockman_read(clockman, data->fbdiv_frac_reg);
+ calc_rate =
+ ((u64)parent_rate * (((u64)fbdiv_int << 24) + fbdiv_frac) + (1 << 23)) >> 24;
+
+ return calc_rate;
+}
+
+static long rp1_pll_core_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ u32 fbdiv_int, fbdiv_frac;
+ long calc_rate;
+
+ calc_rate = get_pll_core_divider(hw, rate, *parent_rate,
+ &fbdiv_int, &fbdiv_frac);
+ return calc_rate;
+}
+
+static void rp1_pll_core_debug_init(struct clk_hw *hw, struct dentry *dentry)
+{
+ struct rp1_pll_core *pll_core = container_of(hw, struct rp1_pll_core, hw);
+ struct rp1_clockman *clockman = pll_core->clockman;
+ const struct rp1_pll_core_data *data = pll_core->data;
+ struct debugfs_reg32 *regs;
+
+ regs = devm_kcalloc(clockman->dev, 4, sizeof(*regs), GFP_KERNEL);
+ if (!regs)
+ return;
+
+ regs[0].name = "cs";
+ regs[0].offset = data->cs_reg;
+ regs[1].name = "pwr";
+ regs[1].offset = data->pwr_reg;
+ regs[2].name = "fbdiv_int";
+ regs[2].offset = data->fbdiv_int_reg;
+ regs[3].name = "fbdiv_frac";
+ regs[3].offset = data->fbdiv_frac_reg;
+
+ rp1_debugfs_regset(clockman, 0, regs, 4, dentry);
+}
+
+static void get_pll_prim_dividers(unsigned long rate, unsigned long parent_rate,
+ u32 *divider1, u32 *divider2)
+{
+ unsigned int div1, div2;
+ unsigned int best_div1 = 7, best_div2 = 7;
+ unsigned long best_rate_diff =
+ abs_diff(DIV_ROUND_CLOSEST(parent_rate, best_div1 * best_div2), rate);
+ unsigned long rate_diff, calc_rate;
+
+ for (div1 = 1; div1 <= 7; div1++) {
+ for (div2 = 1; div2 <= div1; div2++) {
+ calc_rate = DIV_ROUND_CLOSEST(parent_rate, div1 * div2);
+ rate_diff = abs_diff(calc_rate, rate);
+
+ if (calc_rate == rate) {
+ best_div1 = div1;
+ best_div2 = div2;
+ goto done;
+ } else if (rate_diff < best_rate_diff) {
+ best_div1 = div1;
+ best_div2 = div2;
+ best_rate_diff = rate_diff;
+ }
+ }
+ }
+
+done:
+ *divider1 = best_div1;
+ *divider2 = best_div2;
+}
+
+static int rp1_pll_set_rate(struct clk_hw *hw,
+ unsigned long rate, unsigned long parent_rate)
+{
+ struct rp1_pll *pll = container_of(hw, struct rp1_pll, hw);
+ struct rp1_clockman *clockman = pll->clockman;
+ const struct rp1_pll_data *data = pll->data;
+ u32 prim, prim_div1, prim_div2;
+
+ get_pll_prim_dividers(rate, parent_rate, &prim_div1, &prim_div2);
+
+ spin_lock(&clockman->regs_lock);
+ prim = clockman_read(clockman, data->ctrl_reg);
+ prim = set_register_field(prim, prim_div1, PLL_PRIM_DIV1_MASK,
+ PLL_PRIM_DIV1_SHIFT);
+ prim = set_register_field(prim, prim_div2, PLL_PRIM_DIV2_MASK,
+ PLL_PRIM_DIV2_SHIFT);
+ clockman_write(clockman, data->ctrl_reg, prim);
+ spin_unlock(&clockman->regs_lock);
+
+ return 0;
+}
+
+static unsigned long rp1_pll_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct rp1_pll *pll = container_of(hw, struct rp1_pll, hw);
+ struct rp1_clockman *clockman = pll->clockman;
+ const struct rp1_pll_data *data = pll->data;
+ u32 prim, prim_div1, prim_div2;
+
+ prim = clockman_read(clockman, data->ctrl_reg);
+ prim_div1 = (prim & PLL_PRIM_DIV1_MASK) >> PLL_PRIM_DIV1_SHIFT;
+ prim_div2 = (prim & PLL_PRIM_DIV2_MASK) >> PLL_PRIM_DIV2_SHIFT;
+
+ if (!prim_div1 || !prim_div2) {
+ dev_err(clockman->dev, "%s: (%s) zero divider value\n",
+ __func__, data->name);
+ return 0;
+ }
+
+ return DIV_ROUND_CLOSEST(parent_rate, prim_div1 * prim_div2);
+}
+
+static long rp1_pll_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ u32 div1, div2;
+
+ get_pll_prim_dividers(rate, *parent_rate, &div1, &div2);
+
+ return DIV_ROUND_CLOSEST(*parent_rate, div1 * div2);
+}
+
+static void rp1_pll_debug_init(struct clk_hw *hw,
+ struct dentry *dentry)
+{
+ struct rp1_pll *pll = container_of(hw, struct rp1_pll, hw);
+ struct rp1_clockman *clockman = pll->clockman;
+ const struct rp1_pll_data *data = pll->data;
+ struct debugfs_reg32 *regs;
+
+ regs = devm_kcalloc(clockman->dev, 1, sizeof(*regs), GFP_KERNEL);
+ if (!regs)
+ return;
+
+ regs[0].name = "prim";
+ regs[0].offset = data->ctrl_reg;
+
+ rp1_debugfs_regset(clockman, 0, regs, 1, dentry);
+}
+
+static int rp1_pll_ph_is_on(struct clk_hw *hw)
+{
+ struct rp1_pll_ph *pll = container_of(hw, struct rp1_pll_ph, hw);
+ struct rp1_clockman *clockman = pll->clockman;
+ const struct rp1_pll_ph_data *data = pll->data;
+
+ return !!(clockman_read(clockman, data->ph_reg) & PLL_PH_EN);
+}
+
+static int rp1_pll_ph_on(struct clk_hw *hw)
+{
+ struct rp1_pll_ph *pll_ph = container_of(hw, struct rp1_pll_ph, hw);
+ struct rp1_clockman *clockman = pll_ph->clockman;
+ const struct rp1_pll_ph_data *data = pll_ph->data;
+ u32 ph_reg;
+
+ /* todo: ensure pri/sec is enabled! */
+ spin_lock(&clockman->regs_lock);
+ ph_reg = clockman_read(clockman, data->ph_reg);
+ ph_reg |= data->phase << PLL_PH_PHASE_SHIFT;
+ ph_reg |= PLL_PH_EN;
+ clockman_write(clockman, data->ph_reg, ph_reg);
+ spin_unlock(&clockman->regs_lock);
+
+ return 0;
+}
+
+static void rp1_pll_ph_off(struct clk_hw *hw)
+{
+ struct rp1_pll_ph *pll_ph = container_of(hw, struct rp1_pll_ph, hw);
+ struct rp1_clockman *clockman = pll_ph->clockman;
+ const struct rp1_pll_ph_data *data = pll_ph->data;
+
+ spin_lock(&clockman->regs_lock);
+ clockman_write(clockman, data->ph_reg,
+ clockman_read(clockman, data->ph_reg) & ~PLL_PH_EN);
+ spin_unlock(&clockman->regs_lock);
+}
+
+static int rp1_pll_ph_set_rate(struct clk_hw *hw,
+ unsigned long rate, unsigned long parent_rate)
+{
+ struct rp1_pll_ph *pll_ph = container_of(hw, struct rp1_pll_ph, hw);
+ const struct rp1_pll_ph_data *data = pll_ph->data;
+
+ /* Nothing really to do here! */
+ WARN_ON(data->fixed_divider != 1 && data->fixed_divider != 2);
+ WARN_ON(rate != parent_rate / data->fixed_divider);
+
+ return 0;
+}
+
+static unsigned long rp1_pll_ph_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct rp1_pll_ph *pll_ph = container_of(hw, struct rp1_pll_ph, hw);
+ const struct rp1_pll_ph_data *data = pll_ph->data;
+
+ return parent_rate / data->fixed_divider;
+}
+
+static long rp1_pll_ph_round_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long *parent_rate)
+{
+ struct rp1_pll_ph *pll_ph = container_of(hw, struct rp1_pll_ph, hw);
+ const struct rp1_pll_ph_data *data = pll_ph->data;
+
+ return *parent_rate / data->fixed_divider;
+}
+
+static void rp1_pll_ph_debug_init(struct clk_hw *hw,
+ struct dentry *dentry)
+{
+ struct rp1_pll_ph *pll_ph = container_of(hw, struct rp1_pll_ph, hw);
+ const struct rp1_pll_ph_data *data = pll_ph->data;
+ struct rp1_clockman *clockman = pll_ph->clockman;
+ struct debugfs_reg32 *regs;
+
+ regs = devm_kcalloc(clockman->dev, 1, sizeof(*regs), GFP_KERNEL);
+ if (!regs)
+ return;
+
+ regs[0].name = "ph_reg";
+ regs[0].offset = data->ph_reg;
+
+ rp1_debugfs_regset(clockman, 0, regs, 1, dentry);
+}
+
+static int rp1_pll_divider_is_on(struct clk_hw *hw)
+{
+ struct rp1_pll *divider = container_of(hw, struct rp1_pll, div.hw);
+ struct rp1_clockman *clockman = divider->clockman;
+ const struct rp1_pll_data *data = divider->data;
+
+ return !(clockman_read(clockman, data->ctrl_reg) & PLL_SEC_RST);
+}
+
+static int rp1_pll_divider_on(struct clk_hw *hw)
+{
+ struct rp1_pll *divider = container_of(hw, struct rp1_pll, div.hw);
+ struct rp1_clockman *clockman = divider->clockman;
+ const struct rp1_pll_data *data = divider->data;
+
+ spin_lock(&clockman->regs_lock);
+ /* Check the implementation bit is set! */
+ WARN_ON(!(clockman_read(clockman, data->ctrl_reg) & PLL_SEC_IMPL));
+ clockman_write(clockman, data->ctrl_reg,
+ clockman_read(clockman, data->ctrl_reg) & ~PLL_SEC_RST);
+ spin_unlock(&clockman->regs_lock);
+
+ return 0;
+}
+
+static void rp1_pll_divider_off(struct clk_hw *hw)
+{
+ struct rp1_pll *divider = container_of(hw, struct rp1_pll, div.hw);
+ struct rp1_clockman *clockman = divider->clockman;
+ const struct rp1_pll_data *data = divider->data;
+
+ spin_lock(&clockman->regs_lock);
+ clockman_write(clockman, data->ctrl_reg, PLL_SEC_RST);
+ spin_unlock(&clockman->regs_lock);
+}
+
+static int rp1_pll_divider_set_rate(struct clk_hw *hw,
+ unsigned long rate,
+ unsigned long parent_rate)
+{
+ struct rp1_pll *divider = container_of(hw, struct rp1_pll, div.hw);
+ struct rp1_clockman *clockman = divider->clockman;
+ const struct rp1_pll_data *data = divider->data;
+ u32 div, sec;
+
+ div = DIV_ROUND_UP_ULL(parent_rate, rate);
+ div = clamp(div, 8u, 19u);
+
+ spin_lock(&clockman->regs_lock);
+ sec = clockman_read(clockman, data->ctrl_reg);
+ sec = set_register_field(sec, div, PLL_SEC_DIV_MASK, PLL_SEC_DIV_SHIFT);
+
+ /* Must keep the divider in reset to change the value. */
+ sec |= PLL_SEC_RST;
+ clockman_write(clockman, data->ctrl_reg, sec);
+
+ // todo: must sleep 10 pll vco cycles
+ sec &= ~PLL_SEC_RST;
+ clockman_write(clockman, data->ctrl_reg, sec);
+ spin_unlock(&clockman->regs_lock);
+
+ return 0;
+}
+
+static unsigned long rp1_pll_divider_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ return clk_divider_ops.recalc_rate(hw, parent_rate);
+}
+
+static long rp1_pll_divider_round_rate(struct clk_hw *hw,
+ unsigned long rate,
+ unsigned long *parent_rate)
+{
+ return clk_divider_ops.round_rate(hw, rate, parent_rate);
+}
+
+static void rp1_pll_divider_debug_init(struct clk_hw *hw, struct dentry *dentry)
+{
+ struct rp1_pll *divider = container_of(hw, struct rp1_pll, div.hw);
+ struct rp1_clockman *clockman = divider->clockman;
+ const struct rp1_pll_data *data = divider->data;
+ struct debugfs_reg32 *regs;
+
+ regs = devm_kcalloc(clockman->dev, 1, sizeof(*regs), GFP_KERNEL);
+ if (!regs)
+ return;
+
+ regs[0].name = "sec";
+ regs[0].offset = data->ctrl_reg;
+
+ rp1_debugfs_regset(clockman, 0, regs, 1, dentry);
+}
+
+static int rp1_clock_is_on(struct clk_hw *hw)
+{
+ struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw);
+ struct rp1_clockman *clockman = clock->clockman;
+ const struct rp1_clock_data *data = clock->data;
+
+ return !!(clockman_read(clockman, data->ctrl_reg) & CLK_CTRL_ENABLE);
+}
+
+static unsigned long rp1_clock_recalc_rate(struct clk_hw *hw,
+ unsigned long parent_rate)
+{
+ struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw);
+ struct rp1_clockman *clockman = clock->clockman;
+ const struct rp1_clock_data *data = clock->data;
+ u64 calc_rate;
+ u64 div;
+
+ u32 frac;
+
+ div = clockman_read(clockman, data->div_int_reg);
+ frac = (data->div_frac_reg != 0) ?
+ clockman_read(clockman, data->div_frac_reg) : 0;
+
+ /* If the integer portion of the divider is 0, treat it as 2^16 */
+ if (!div)
+ div = 1 << 16;
+
+ div = (div << CLK_DIV_FRAC_BITS) | (frac >> (32 - CLK_DIV_FRAC_BITS));
+
+ calc_rate = (u64)parent_rate << CLK_DIV_FRAC_BITS;
+ calc_rate = div64_u64(calc_rate, div);
+
+ return calc_rate;
+}
+
+static int rp1_clock_on(struct clk_hw *hw)
+{
+ struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw);
+ struct rp1_clockman *clockman = clock->clockman;
+ const struct rp1_clock_data *data = clock->data;
+
+ spin_lock(&clockman->regs_lock);
+ clockman_write(clockman, data->ctrl_reg,
+ clockman_read(clockman, data->ctrl_reg) | CLK_CTRL_ENABLE);
+ /* If this is a GPCLK, turn on the output-enable */
+ if (data->oe_mask)
+ clockman_write(clockman, GPCLK_OE_CTRL,
+ clockman_read(clockman, GPCLK_OE_CTRL) | data->oe_mask);
+ spin_unlock(&clockman->regs_lock);
+
+ return 0;
+}
+
+static void rp1_clock_off(struct clk_hw *hw)
+{
+ struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw);
+ struct rp1_clockman *clockman = clock->clockman;
+ const struct rp1_clock_data *data = clock->data;
+
+ spin_lock(&clockman->regs_lock);
+ clockman_write(clockman, data->ctrl_reg,
+ clockman_read(clockman, data->ctrl_reg) & ~CLK_CTRL_ENABLE);
+ /* If this is a GPCLK, turn off the output-enable */
+ if (data->oe_mask)
+ clockman_write(clockman, GPCLK_OE_CTRL,
+ clockman_read(clockman, GPCLK_OE_CTRL) & ~data->oe_mask);
+ spin_unlock(&clockman->regs_lock);
+}
+
+static u32 rp1_clock_choose_div(unsigned long rate, unsigned long parent_rate,
+ const struct rp1_clock_data *data)
+{
+ u64 div;
+
+ /*
+ * Due to earlier rounding, calculated parent_rate may differ from
+ * expected value. Don't fail on a small discrepancy near unity divide.
+ */
+ if (!rate || rate > parent_rate + (parent_rate >> CLK_DIV_FRAC_BITS))
+ return 0;
+
+ /*
+ * Always express div in fixed-point format for fractional division;
+ * If no fractional divider is present, the fraction part will be zero.
+ */
+ if (data->div_frac_reg) {
+ div = (u64)parent_rate << CLK_DIV_FRAC_BITS;
+ div = DIV_ROUND_CLOSEST_ULL(div, rate);
+ } else {
+ div = DIV_ROUND_CLOSEST_ULL(parent_rate, rate);
+ div <<= CLK_DIV_FRAC_BITS;
+ }
+
+ div = clamp(div,
+ 1ull << CLK_DIV_FRAC_BITS,
+ (u64)data->div_int_max << CLK_DIV_FRAC_BITS);
+
+ return div;
+}
+
+static u8 rp1_clock_get_parent(struct clk_hw *hw)
+{
+ struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw);
+ struct rp1_clockman *clockman = clock->clockman;
+ const struct rp1_clock_data *data = clock->data;
+ u32 sel, ctrl;
+ u8 parent;
+
+ /* Sel is one-hot, so find the first bit set */
+ sel = clockman_read(clockman, data->sel_reg);
+ parent = ffs(sel) - 1;
+
+ /* sel == 0 implies the parent clock is not enabled yet. */
+ if (!sel) {
+ /* Read the clock src from the CTRL register instead */
+ ctrl = clockman_read(clockman, data->ctrl_reg);
+ parent = (ctrl & data->clk_src_mask) >> CLK_CTRL_SRC_SHIFT;
+ }
+
+ if (parent >= data->num_std_parents)
+ parent = AUX_SEL;
+
+ if (parent == AUX_SEL) {
+ /*
+ * Clock parent is an auxiliary source, so get the parent from
+ * the AUXSRC register field.
+ */
+ ctrl = clockman_read(clockman, data->ctrl_reg);
+ parent = (ctrl & CLK_CTRL_AUXSRC_MASK) >> CLK_CTRL_AUXSRC_SHIFT;
+ parent += data->num_std_parents;
+ }
+
+ return parent;
+}
+
+static int rp1_clock_set_parent(struct clk_hw *hw, u8 index)
+{
+ struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw);
+ struct rp1_clockman *clockman = clock->clockman;
+ const struct rp1_clock_data *data = clock->data;
+ u32 ctrl, sel;
+
+ spin_lock(&clockman->regs_lock);
+ ctrl = clockman_read(clockman, data->ctrl_reg);
+
+ if (index >= data->num_std_parents) {
+ /* This is an aux source request */
+ if (index >= data->num_std_parents + data->num_aux_parents) {
+ spin_unlock(&clockman->regs_lock);
+ return -EINVAL;
+ }
+
+ /* Select parent from aux list */
+ ctrl = set_register_field(ctrl, index - data->num_std_parents,
+ CLK_CTRL_AUXSRC_MASK,
+ CLK_CTRL_AUXSRC_SHIFT);
+ /* Set src to aux list */
+ ctrl = set_register_field(ctrl, AUX_SEL, data->clk_src_mask,
+ CLK_CTRL_SRC_SHIFT);
+ } else {
+ ctrl = set_register_field(ctrl, index, data->clk_src_mask,
+ CLK_CTRL_SRC_SHIFT);
+ }
+
+ clockman_write(clockman, data->ctrl_reg, ctrl);
+ spin_unlock(&clockman->regs_lock);
+
+ sel = rp1_clock_get_parent(hw);
+ WARN(sel != index, "(%s): Parent index req %u returned back %u\n",
+ data->name, index, sel);
+
+ return 0;
+}
+
+static int rp1_clock_set_rate_and_parent(struct clk_hw *hw,
+ unsigned long rate,
+ unsigned long parent_rate,
+ u8 parent)
+{
+ struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw);
+ struct rp1_clockman *clockman = clock->clockman;
+ const struct rp1_clock_data *data = clock->data;
+ u32 div = rp1_clock_choose_div(rate, parent_rate, data);
+
+ WARN(rate > 4000000000ll, "rate is -ve (%d)\n", (int)rate);
+
+ if (WARN(!div,
+ "clk divider calculated as 0! (%s, rate %ld, parent rate %ld)\n",
+ data->name, rate, parent_rate))
+ div = 1 << CLK_DIV_FRAC_BITS;
+
+ spin_lock(&clockman->regs_lock);
+
+ clockman_write(clockman, data->div_int_reg, div >> CLK_DIV_FRAC_BITS);
+ if (data->div_frac_reg)
+ clockman_write(clockman, data->div_frac_reg, div << (32 - CLK_DIV_FRAC_BITS));
+
+ spin_unlock(&clockman->regs_lock);
+
+ if (parent != 0xff)
+ rp1_clock_set_parent(hw, parent);
+
+ return 0;
+}
+
+static int rp1_clock_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
+{
+ return rp1_clock_set_rate_and_parent(hw, rate, parent_rate, 0xff);
+}
+
+static void rp1_clock_choose_div_and_prate(struct clk_hw *hw,
+ int parent_idx,
+ unsigned long rate,
+ unsigned long *prate,
+ unsigned long *calc_rate)
+{
+ struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw);
+ const struct rp1_clock_data *data = clock->data;
+ struct clk_hw *parent;
+ u32 div;
+ u64 tmp;
+
+ parent = clk_hw_get_parent_by_index(hw, parent_idx);
+
+ *prate = clk_hw_get_rate(parent);
+ div = rp1_clock_choose_div(rate, *prate, data);
+
+ if (!div) {
+ *calc_rate = 0;
+ return;
+ }
+
+ /* Recalculate to account for rounding errors */
+ tmp = (u64)*prate << CLK_DIV_FRAC_BITS;
+ tmp = div_u64(tmp, div);
+
+ /*
+ * Prevent overclocks - if all parent choices result in
+ * a downstream clock in excess of the maximum, then the
+ * call to set the clock will fail.
+ */
+ if (tmp > clock->data->max_freq)
+ *calc_rate = 0;
+ else
+ *calc_rate = tmp;
+}
+
+static int rp1_clock_determine_rate(struct clk_hw *hw,
+ struct clk_rate_request *req)
+{
+ struct clk_hw *parent, *best_parent = NULL;
+ unsigned long best_rate = 0;
+ unsigned long best_prate = 0;
+ unsigned long best_rate_diff = ULONG_MAX;
+ unsigned long prate, calc_rate;
+ size_t i;
+
+ /*
+ * If the NO_REPARENT flag is set, try to use existing parent.
+ */
+ if ((clk_hw_get_flags(hw) & CLK_SET_RATE_NO_REPARENT)) {
+ i = rp1_clock_get_parent(hw);
+ parent = clk_hw_get_parent_by_index(hw, i);
+ if (parent) {
+ rp1_clock_choose_div_and_prate(hw, i, req->rate, &prate,
+ &calc_rate);
+ if (calc_rate > 0) {
+ req->best_parent_hw = parent;
+ req->best_parent_rate = prate;
+ req->rate = calc_rate;
+ return 0;
+ }
+ }
+ }
+
+ /*
+ * Select parent clock that results in the closest rate (lower or
+ * higher)
+ */
+ for (i = 0; i < clk_hw_get_num_parents(hw); i++) {
+ parent = clk_hw_get_parent_by_index(hw, i);
+ if (!parent)
+ continue;
+
+ rp1_clock_choose_div_and_prate(hw, i, req->rate, &prate,
+ &calc_rate);
+
+ if (abs_diff(calc_rate, req->rate) < best_rate_diff) {
+ best_parent = parent;
+ best_prate = prate;
+ best_rate = calc_rate;
+ best_rate_diff = abs_diff(calc_rate, req->rate);
+
+ if (best_rate_diff == 0)
+ break;
+ }
+ }
+
+ if (best_rate == 0)
+ return -EINVAL;
+
+ req->best_parent_hw = best_parent;
+ req->best_parent_rate = best_prate;
+ req->rate = best_rate;
+
+ return 0;
+}
+
+static void rp1_clk_debug_init(struct clk_hw *hw, struct dentry *dentry)
+{
+ struct rp1_clock *clock = container_of(hw, struct rp1_clock, hw);
+ struct rp1_clockman *clockman = clock->clockman;
+ const struct rp1_clock_data *data = clock->data;
+ struct debugfs_reg32 *regs;
+ int i;
+
+ regs = devm_kcalloc(clockman->dev, 4, sizeof(*regs), GFP_KERNEL);
+ if (!regs)
+ return;
+
+ i = 0;
+ regs[i].name = "ctrl";
+ regs[i++].offset = data->ctrl_reg;
+ regs[i].name = "div_int";
+ regs[i++].offset = data->div_int_reg;
+ regs[i].name = "div_frac";
+ regs[i++].offset = data->div_frac_reg;
+ regs[i].name = "sel";
+ regs[i++].offset = data->sel_reg;
+
+ rp1_debugfs_regset(clockman, 0, regs, i, dentry);
+}
+
+static const struct clk_ops rp1_pll_core_ops = {
+ .is_prepared = rp1_pll_core_is_on,
+ .prepare = rp1_pll_core_on,
+ .unprepare = rp1_pll_core_off,
+ .set_rate = rp1_pll_core_set_rate,
+ .recalc_rate = rp1_pll_core_recalc_rate,
+ .round_rate = rp1_pll_core_round_rate,
+ .debug_init = rp1_pll_core_debug_init,
+};
+
+static const struct clk_ops rp1_pll_ops = {
+ .set_rate = rp1_pll_set_rate,
+ .recalc_rate = rp1_pll_recalc_rate,
+ .round_rate = rp1_pll_round_rate,
+ .debug_init = rp1_pll_debug_init,
+};
+
+static const struct clk_ops rp1_pll_ph_ops = {
+ .is_prepared = rp1_pll_ph_is_on,
+ .prepare = rp1_pll_ph_on,
+ .unprepare = rp1_pll_ph_off,
+ .set_rate = rp1_pll_ph_set_rate,
+ .recalc_rate = rp1_pll_ph_recalc_rate,
+ .round_rate = rp1_pll_ph_round_rate,
+ .debug_init = rp1_pll_ph_debug_init,
+};
+
+static const struct clk_ops rp1_pll_divider_ops = {
+ .is_prepared = rp1_pll_divider_is_on,
+ .prepare = rp1_pll_divider_on,
+ .unprepare = rp1_pll_divider_off,
+ .set_rate = rp1_pll_divider_set_rate,
+ .recalc_rate = rp1_pll_divider_recalc_rate,
+ .round_rate = rp1_pll_divider_round_rate,
+ .debug_init = rp1_pll_divider_debug_init,
+};
+
+static const struct clk_ops rp1_clk_ops = {
+ .is_prepared = rp1_clock_is_on,
+ .prepare = rp1_clock_on,
+ .unprepare = rp1_clock_off,
+ .recalc_rate = rp1_clock_recalc_rate,
+ .get_parent = rp1_clock_get_parent,
+ .set_parent = rp1_clock_set_parent,
+ .set_rate_and_parent = rp1_clock_set_rate_and_parent,
+ .set_rate = rp1_clock_set_rate,
+ .determine_rate = rp1_clock_determine_rate,
+ .debug_init = rp1_clk_debug_init,
+};
+
+static struct clk_hw *rp1_register_pll_core(struct rp1_clockman *clockman,
+ const void *data)
+{
+ const char *ref_clk_name = clk_hw_get_name(clockman->hw_xosc);
+ const struct rp1_pll_core_data *pll_core_data = data;
+ struct rp1_pll_core *pll_core;
+ struct clk_init_data init;
+ int ret;
+
+ memset(&init, 0, sizeof(init));
+
+ /* All of the PLL cores derive from the external oscillator. */
+ init.parent_names = &ref_clk_name;
+ init.num_parents = 1;
+ init.name = pll_core_data->name;
+ init.ops = &rp1_pll_core_ops;
+ init.flags = pll_core_data->flags | CLK_IGNORE_UNUSED | CLK_IS_CRITICAL;
+
+ pll_core = devm_kzalloc(clockman->dev, sizeof(*pll_core), GFP_KERNEL);
+ if (!pll_core)
+ return NULL;
+
+ pll_core->clockman = clockman;
+ pll_core->data = pll_core_data;
+ pll_core->hw.init = &init;
+
+ ret = devm_clk_hw_register(clockman->dev, &pll_core->hw);
+ if (ret)
+ return ERR_PTR(ret);
+
+ return &pll_core->hw;
+}
+
+static struct clk_hw *rp1_register_pll(struct rp1_clockman *clockman,
+ const void *data)
+{
+ const struct rp1_pll_data *pll_data = data;
+ struct rp1_pll *pll;
+ struct clk_init_data init;
+ int ret;
+
+ memset(&init, 0, sizeof(init));
+
+ init.parent_names = &pll_data->source_pll;
+ init.num_parents = 1;
+ init.name = pll_data->name;
+ init.ops = &rp1_pll_ops;
+ init.flags = pll_data->flags | CLK_IGNORE_UNUSED | CLK_IS_CRITICAL;
+
+ pll = devm_kzalloc(clockman->dev, sizeof(*pll), GFP_KERNEL);
+ if (!pll)
+ return NULL;
+
+ pll->clockman = clockman;
+ pll->data = pll_data;
+ pll->hw.init = &init;
+
+ ret = devm_clk_hw_register(clockman->dev, &pll->hw);
+ if (ret)
+ return ERR_PTR(ret);
+
+ return &pll->hw;
+}
+
+static struct clk_hw *rp1_register_pll_ph(struct rp1_clockman *clockman,
+ const void *data)
+{
+ const struct rp1_pll_ph_data *ph_data = data;
+ struct rp1_pll_ph *ph;
+ struct clk_init_data init;
+ int ret;
+
+ memset(&init, 0, sizeof(init));
+
+ init.parent_names = &ph_data->source_pll;
+ init.num_parents = 1;
+ init.name = ph_data->name;
+ init.ops = &rp1_pll_ph_ops;
+ init.flags = ph_data->flags | CLK_IGNORE_UNUSED;
+
+ ph = devm_kzalloc(clockman->dev, sizeof(*ph), GFP_KERNEL);
+ if (!ph)
+ return NULL;
+
+ ph->clockman = clockman;
+ ph->data = ph_data;
+ ph->hw.init = &init;
+
+ ret = devm_clk_hw_register(clockman->dev, &ph->hw);
+ if (ret)
+ return ERR_PTR(ret);
+
+ return &ph->hw;
+}
+
+static struct clk_hw *rp1_register_pll_divider(struct rp1_clockman *clockman,
+ const void *data)
+{
+ const struct rp1_pll_data *divider_data = data;
+ struct rp1_pll *divider;
+ struct clk_init_data init;
+ int ret;
+
+ memset(&init, 0, sizeof(init));
+
+ init.parent_names = &divider_data->source_pll;
+ init.num_parents = 1;
+ init.name = divider_data->name;
+ init.ops = &rp1_pll_divider_ops;
+ init.flags = divider_data->flags | CLK_IGNORE_UNUSED | CLK_IS_CRITICAL;
+
+ divider = devm_kzalloc(clockman->dev, sizeof(*divider), GFP_KERNEL);
+ if (!divider)
+ return NULL;
+
+ divider->div.reg = clockman->regs + divider_data->ctrl_reg;
+ divider->div.shift = PLL_SEC_DIV_SHIFT;
+ divider->div.width = PLL_SEC_DIV_WIDTH;
+ divider->div.flags = CLK_DIVIDER_ROUND_CLOSEST;
+ divider->div.flags |= CLK_IS_CRITICAL;
+ divider->div.lock = &clockman->regs_lock;
+ divider->div.hw.init = &init;
+ divider->div.table = pll_sec_div_table;
+
+ divider->clockman = clockman;
+ divider->data = divider_data;
+
+ ret = devm_clk_hw_register(clockman->dev, &divider->div.hw);
+ if (ret)
+ return ERR_PTR(ret);
+
+ return &divider->div.hw;
+}
+
+static struct clk_hw *rp1_register_clock(struct rp1_clockman *clockman,
+ const void *data)
+{
+ const struct rp1_clock_data *clock_data = data;
+ struct rp1_clock *clock;
+ struct clk_init_data init;
+ int ret;
+
+ if (WARN_ON_ONCE(MAX_CLK_PARENTS <
+ clock_data->num_std_parents + clock_data->num_aux_parents))
+ return NULL;
+
+ /* There must be a gap for the AUX selector */
+ if (WARN_ON_ONCE(clock_data->num_std_parents > AUX_SEL &&
+ strcmp("-", clock_data->parents[AUX_SEL])))
+ return NULL;
+
+ memset(&init, 0, sizeof(init));
+ init.parent_names = clock_data->parents;
+ init.num_parents = clock_data->num_std_parents +
+ clock_data->num_aux_parents;
+ init.name = clock_data->name;
+ init.flags = clock_data->flags | CLK_IGNORE_UNUSED;
+ init.ops = &rp1_clk_ops;
+
+ clock = devm_kzalloc(clockman->dev, sizeof(*clock), GFP_KERNEL);
+ if (!clock)
+ return NULL;
+
+ clock->clockman = clockman;
+ clock->data = clock_data;
+ clock->hw.init = &init;
+
+ ret = devm_clk_hw_register(clockman->dev, &clock->hw);
+ if (ret)
+ return ERR_PTR(ret);
+
+ return &clock->hw;
+}
+
+/* Assignment helper macros for different clock types. */
+#define _REGISTER(f, ...) { .clk_register = f, .data = __VA_ARGS__ }
+
+#define REGISTER_PLL_CORE(...) _REGISTER(&rp1_register_pll_core, \
+ &(struct rp1_pll_core_data) \
+ {__VA_ARGS__})
+
+#define REGISTER_PLL(...) _REGISTER(&rp1_register_pll, \
+ &(struct rp1_pll_data) \
+ {__VA_ARGS__})
+
+#define REGISTER_PLL_PH(...) _REGISTER(&rp1_register_pll_ph, \
+ &(struct rp1_pll_ph_data) \
+ {__VA_ARGS__})
+
+#define REGISTER_PLL_DIV(...) _REGISTER(&rp1_register_pll_divider, \
+ &(struct rp1_pll_data) \
+ {__VA_ARGS__})
+
+#define REGISTER_CLK(...) _REGISTER(&rp1_register_clock, \
+ &(struct rp1_clock_data) \
+ {__VA_ARGS__})
+
+static const struct rp1_clk_desc clk_desc_array[] = {
+ [RP1_PLL_SYS_CORE] = REGISTER_PLL_CORE(.name = "pll_sys_core",
+ .cs_reg = PLL_SYS_CS,
+ .pwr_reg = PLL_SYS_PWR,
+ .fbdiv_int_reg = PLL_SYS_FBDIV_INT,
+ .fbdiv_frac_reg = PLL_SYS_FBDIV_FRAC,
+ ),
+
+ [RP1_PLL_AUDIO_CORE] = REGISTER_PLL_CORE(.name = "pll_audio_core",
+ .cs_reg = PLL_AUDIO_CS,
+ .pwr_reg = PLL_AUDIO_PWR,
+ .fbdiv_int_reg = PLL_AUDIO_FBDIV_INT,
+ .fbdiv_frac_reg = PLL_AUDIO_FBDIV_FRAC,
+ ),
+
+ [RP1_PLL_VIDEO_CORE] = REGISTER_PLL_CORE(.name = "pll_video_core",
+ .cs_reg = PLL_VIDEO_CS,
+ .pwr_reg = PLL_VIDEO_PWR,
+ .fbdiv_int_reg = PLL_VIDEO_FBDIV_INT,
+ .fbdiv_frac_reg = PLL_VIDEO_FBDIV_FRAC,
+ ),
+
+ [RP1_PLL_SYS] = REGISTER_PLL(.name = "pll_sys",
+ .source_pll = "pll_sys_core",
+ .ctrl_reg = PLL_SYS_PRIM,
+ .fc0_src = FC_NUM(0, 2),
+ ),
+
+ [RP1_CLK_ETH_TSU] = REGISTER_CLK(.name = "clk_eth_tsu",
+ .parents = {"rp1-xosc"},
+ .num_std_parents = 0,
+ .num_aux_parents = 1,
+ .ctrl_reg = CLK_ETH_TSU_CTRL,
+ .div_int_reg = CLK_ETH_TSU_DIV_INT,
+ .sel_reg = CLK_ETH_TSU_SEL,
+ .div_int_max = DIV_INT_8BIT_MAX,
+ .max_freq = 50 * MHz,
+ .fc0_src = FC_NUM(5, 7),
+ ),
+
+ [RP1_CLK_SYS] = REGISTER_CLK(.name = "clk_sys",
+ .parents = {"rp1-xosc", "-", "pll_sys"},
+ .num_std_parents = 3,
+ .num_aux_parents = 0,
+ .ctrl_reg = CLK_SYS_CTRL,
+ .div_int_reg = CLK_SYS_DIV_INT,
+ .sel_reg = CLK_SYS_SEL,
+ .div_int_max = DIV_INT_24BIT_MAX,
+ .max_freq = 200 * MHz,
+ .fc0_src = FC_NUM(0, 4),
+ .clk_src_mask = 0x3,
+ ),
+
+ [RP1_PLL_SYS_PRI_PH] = REGISTER_PLL_PH(.name = "pll_sys_pri_ph",
+ .source_pll = "pll_sys",
+ .ph_reg = PLL_SYS_PRIM,
+ .fixed_divider = 2,
+ .phase = RP1_PLL_PHASE_0,
+ .fc0_src = FC_NUM(1, 2),
+ ),
+
+ [RP1_PLL_SYS_SEC] = REGISTER_PLL_DIV(.name = "pll_sys_sec",
+ .source_pll = "pll_sys_core",
+ .ctrl_reg = PLL_SYS_SEC,
+ .fc0_src = FC_NUM(2, 2),
+ ),
+};
+
+static int rp1_clk_probe(struct platform_device *pdev)
+{
+ const size_t asize = ARRAY_SIZE(clk_desc_array);
+ const struct rp1_clk_desc *desc;
+ struct device *dev = &pdev->dev;
+ struct rp1_clockman *clockman;
+ struct clk *clk_xosc;
+ struct clk_hw **hws;
+ unsigned int i;
+
+ clockman = devm_kzalloc(dev, struct_size(clockman, onecell.hws, asize),
+ GFP_KERNEL);
+ if (!clockman)
+ return -ENOMEM;
+
+ spin_lock_init(&clockman->regs_lock);
+ clockman->dev = dev;
+
+ clockman->regs = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(clockman->regs))
+ return PTR_ERR(clockman->regs);
+
+ clk_xosc = devm_clk_get_enabled(dev, NULL);
+ if (IS_ERR(clk_xosc))
+ return PTR_ERR(clk_xosc);
+
+ clockman->hw_xosc = __clk_get_hw(clk_xosc);
+ clockman->onecell.num = asize;
+ hws = clockman->onecell.hws;
+
+ for (i = 0; i < asize; i++) {
+ desc = &clk_desc_array[i];
+ if (desc->clk_register && desc->data) {
+ hws[i] = desc->clk_register(clockman, desc->data);
+ if (IS_ERR_OR_NULL(hws[i]))
+ dev_err(dev, "Unable to register clock: %s\n",
+ clk_hw_get_name(hws[i]));
+ }
+ }
+
+ platform_set_drvdata(pdev, clockman);
+
+ return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
+ &clockman->onecell);
+}
+
+static const struct of_device_id rp1_clk_of_match[] = {
+ { .compatible = "raspberrypi,rp1-clocks" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, rp1_clk_of_match);
+
+static struct platform_driver rp1_clk_driver = {
+ .driver = {
+ .name = "rp1-clk",
+ .of_match_table = rp1_clk_of_match,
+ },
+ .probe = rp1_clk_probe,
+};
+
+static int __init rp1_clk_driver_init(void)
+{
+ return platform_driver_register(&rp1_clk_driver);
+}
+postcore_initcall(rp1_clk_driver_init);
+
+static void __exit rp1_clk_driver_exit(void)
+{
+ platform_driver_unregister(&rp1_clk_driver);
+}
+module_exit(rp1_clk_driver_exit);
+
+MODULE_AUTHOR("Naushir Patuck <naush@xxxxxxxxxxxxxxx>");
+MODULE_AUTHOR("Andrea della Porta <andrea.porta@xxxxxxxx>");
+MODULE_DESCRIPTION("RP1 clock driver");
+MODULE_LICENSE("GPL");
--
2.35.3