[PATCH 2/2] clk: meson-g12a: Add AO Clock controller driver
From: Jian Hu
Date: Fri Aug 10 2018 - 05:54:55 EST
Add a Clock driver for the ALways-On part
of the Amlogic Meson-G12A SoC.
Signed-off-by: Jian Hu <jian.hu@xxxxxxxxxxx>
---
drivers/clk/meson/Makefile | 2 +-
drivers/clk/meson/g12a-aoclk.c | 170 +++++++++++++++++++++++++++++++++++++++++
drivers/clk/meson/g12a-aoclk.h | 36 +++++++++
3 files changed, 207 insertions(+), 1 deletion(-)
create mode 100644 drivers/clk/meson/g12a-aoclk.c
create mode 100644 drivers/clk/meson/g12a-aoclk.h
diff --git a/drivers/clk/meson/Makefile b/drivers/clk/meson/Makefile
index 2b1a562..d5c2dcd 100644
--- a/drivers/clk/meson/Makefile
+++ b/drivers/clk/meson/Makefile
@@ -9,5 +9,5 @@ obj-$(CONFIG_COMMON_CLK_MESON8B) += meson8b.o
obj-$(CONFIG_COMMON_CLK_GXBB) += gxbb.o gxbb-aoclk.o gxbb-aoclk-32k.o
obj-$(CONFIG_COMMON_CLK_AXG) += axg.o axg-aoclk.o
obj-$(CONFIG_COMMON_CLK_AXG_AUDIO) += axg-audio.o
-obj-$(CONFIG_COMMON_CLK_G12A) += g12a.o
+obj-$(CONFIG_COMMON_CLK_G12A) += g12a.o g12a-aoclk.c
obj-$(CONFIG_COMMON_CLK_REGMAP_MESON) += clk-regmap.o
diff --git a/drivers/clk/meson/g12a-aoclk.c b/drivers/clk/meson/g12a-aoclk.c
new file mode 100644
index 0000000..a5cd95c
--- /dev/null
+++ b/drivers/clk/meson/g12a-aoclk.c
@@ -0,0 +1,170 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Amlogic Meson-G12A Clock Controller Driver
+ *
+ * Copyright (c) 2016 Baylibre SAS.
+ * Author: Michael Turquette <mturquette@xxxxxxxxxxxx>
+ *
+ * Copyright (c) 2018 Amlogic, inc.
+ * Author: Jian Hu <jian.hu@xxxxxxxxxxx>
+ */
+#include <linux/clk-provider.h>
+#include <linux/platform_device.h>
+#include <linux/reset-controller.h>
+#include <linux/mfd/syscon.h>
+#include <linux/init.h>
+#include "clkc.h"
+#include "g12a-aoclk.h"
+
+#define G12A_AO_GATE0(_name, _bit) \
+static struct clk_regmap _name##_ao = { \
+ .data = &(struct clk_regmap_gate_data) { \
+ .offset = (AO_CLK_GATE0), \
+ .bit_idx = (_bit), \
+ }, \
+ .hw.init = &(struct clk_init_data) { \
+ .name = #_name "_ao", \
+ .ops = &clk_regmap_gate_ops, \
+ .parent_names = (const char *[]){ "clk81" }, \
+ .num_parents = 1, \
+ }, \
+}
+
+G12A_AO_GATE0(ahb_bus, 0);
+G12A_AO_GATE0(remote, 1);
+G12A_AO_GATE0(i2c_master, 2);
+G12A_AO_GATE0(i2c_slave, 3);
+G12A_AO_GATE0(uart1, 4);
+G12A_AO_GATE0(prod_i2c, 5);
+G12A_AO_GATE0(uart2, 6);
+G12A_AO_GATE0(ir_blaster, 7);
+G12A_AO_GATE0(saradc, 8);
+
+static struct clk_regmap ao_clk81 = {
+ .data = &(struct clk_regmap_mux_data) {
+ .offset = AO_RTI_PWR_CNTL_REG0,
+ .mask = 0x1,
+ .shift = 8,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "ao_clk81",
+ .ops = &clk_regmap_mux_ro_ops,
+ .parent_names = (const char *[]){ "clk81", "ao_alt_xtal"},
+ .num_parents = 2,
+ },
+};
+
+static struct clk_regmap g12a_saradc_mux = {
+ .data = &(struct clk_regmap_mux_data) {
+ .offset = AO_SAR_CLK,
+ .mask = 0x3,
+ .shift = 9,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "g12a_saradc_mux",
+ .ops = &clk_regmap_mux_ops,
+ .parent_names = (const char *[]){ "xtal", "ao_clk81" },
+ .num_parents = 2,
+ },
+};
+
+static struct clk_regmap g12a_saradc_div = {
+ .data = &(struct clk_regmap_div_data) {
+ .offset = AO_SAR_CLK,
+ .shift = 0,
+ .width = 8,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "g12a_saradc_div",
+ .ops = &clk_regmap_divider_ops,
+ .parent_names = (const char *[]){ "g12a_saradc_mux" },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
+static struct clk_regmap g12a_saradc_gate = {
+ .data = &(struct clk_regmap_gate_data) {
+ .offset = AO_SAR_CLK,
+ .bit_idx = 8,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "g12a_saradc_gate",
+ .ops = &clk_regmap_gate_ops,
+ .parent_names = (const char *[]){ "g12a_saradc_div" },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
+static unsigned int g12a_aoclk_reset[] = {
+ [RESET_AO_REMOTE] = 16,
+ [RESET_AO_UART1] = 17,
+ [RESET_AO_I2C_MASTER] = 18,
+ [RESET_AO_I2C_SLAVE] = 19,
+ [RESET_AO_SARADC] = 20,
+ [RESET_AO_UART2] = 22,
+ [RESET_AO_IR_BLASTER] = 23,
+};
+
+static struct clk_regmap *g12a_aoclk_regmap[] = {
+ [CLKID_AO_AHB_BUS] = &ahb_bus_ao,
+ [CLKID_AO_REMOTE] = &remote_ao,
+ [CLKID_AO_I2C_MASTER] = &i2c_master_ao,
+ [CLKID_AO_I2C_SLAVE] = &i2c_slave_ao,
+ [CLKID_AO_UART1] = &uart1_ao,
+ [CLKID_AO_PROD_I2C] = &prod_i2c_ao,
+ [CLKID_AO_UART2] = &uart2_ao,
+ [CLKID_AO_IR_BLASTER] = &ir_blaster_ao,
+ [CLKID_AO_SAR_ADC] = &saradc_ao,
+ [CLKID_AO_CLK81] = &ao_clk81,
+ [CLKID_AO_SAR_ADC_SEL] = &g12a_saradc_mux,
+ [CLKID_AO_SAR_ADC_DIV] = &g12a_saradc_div,
+ [CLKID_AO_SAR_ADC_CLK] = &g12a_saradc_gate,
+};
+
+static struct clk_hw_onecell_data g12a_aoclk_onecell_data = {
+ .hws = {
+ [CLKID_AO_AHB_BUS] = &ahb_bus_ao.hw,
+ [CLKID_AO_REMOTE] = &remote_ao.hw,
+ [CLKID_AO_I2C_MASTER] = &i2c_master_ao.hw,
+ [CLKID_AO_I2C_SLAVE] = &i2c_slave_ao.hw,
+ [CLKID_AO_UART1] = &uart1_ao.hw,
+ [CLKID_AO_PROD_I2C] = &prod_i2c_ao.hw,
+ [CLKID_AO_UART2] = &uart2_ao.hw,
+ [CLKID_AO_IR_BLASTER] = &ir_blaster_ao.hw,
+ [CLKID_AO_SAR_ADC] = &saradc_ao.hw,
+ [CLKID_AO_CLK81] = &ao_clk81.hw,
+ [CLKID_AO_SAR_ADC_SEL] = &g12a_saradc_mux.hw,
+ [CLKID_AO_SAR_ADC_DIV] = &g12a_saradc_div.hw,
+ [CLKID_AO_SAR_ADC_CLK] = &g12a_saradc_gate.hw,
+ },
+ .num = NR_CLKS,
+};
+
+static struct meson_aoclk_data g12a_aoclkc_data = {
+ .reset_reg = AO_RTI_GEN_CNTL_REG0,
+ .num_reset = ARRAY_SIZE(g12a_aoclk_reset),
+ .reset = g12a_aoclk_reset,
+ .num_clks = ARRAY_SIZE(g12a_aoclk_regmap),
+ .clks = g12a_aoclk_regmap,
+ .hw_data = &g12a_aoclk_onecell_data,
+};
+
+static const struct of_device_id g12a_aoclkc_match_table[] = {
+ {
+ .compatible = "amlogic,g12a-aoclkc",
+ .data = &g12a_aoclkc_data,
+ },
+ { }
+};
+
+static struct platform_driver g12a_aoclkc_driver = {
+ .probe = meson_aoclkc_probe,
+ .driver = {
+ .name = "g12a-aoclkc",
+ .of_match_table = g12a_aoclkc_match_table,
+ },
+};
+
+builtin_platform_driver(g12a_aoclkc_driver);
diff --git a/drivers/clk/meson/g12a-aoclk.h b/drivers/clk/meson/g12a-aoclk.h
new file mode 100644
index 0000000..007183e
--- /dev/null
+++ b/drivers/clk/meson/g12a-aoclk.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */
+/*
+ * Copyright (c) 2017 BayLibre, SAS
+ * Author: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
+ *
+ * Copyright (c) 2018 Amlogic, inc.
+ * Author: Jian Hu <Jian.Hu@xxxxxxxxxxx>
+ */
+
+#ifndef __G12A_AOCLKC_H
+#define __G12A_AOCLKC_H
+
+//#include "meson-aoclk.h"
+
+#define NR_CLKS 14
+
+/* AO Configuration Clock registers offsets
+ * Register offsets from the data sheet must be multiplied by 4.
+ */
+#define AO_RTI_PWR_CNTL_REG0 0x10
+#define AO_RTI_GEN_CNTL_REG0 0x40
+#define AO_OSCIN_CNTL 0x58
+#define AO_CRT_CLK_CNTL1 0x68
+#define AO_SAR_CLK 0x90
+#define AO_RTC_ALT_CLK_CNTL0 0x94
+#define AO_RTC_ALT_CLK_CNTL1 0x98
+
+/*
+ *AO CLK81 gate clocks
+ */
+#define AO_CLK_GATE0 0x4c
+
+#include <dt-bindings/clock/g12a-aoclkc.h>
+#include <dt-bindings/reset/g12a-aoclkc.h>
+
+#endif /* __G12A_AOCLKC_H */
--
1.9.1