Re: [PATCH v2 3/9] clk: rockchip: add clock controller for rk3036

From: Heiko Stübner
Date: Thu Sep 17 2015 - 05:47:12 EST

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Hi,

Am Donnerstag, 17. September 2015, 16:28:54 schrieb Xing Zheng:
> Add the clock tree definition for the new rk3036 SoC.
>
> Signed-off-by: Xing Zheng <zhengxing@xxxxxxxxxxxxxx>

missing a dt-bindings document in a separate patch. See "dt-bindings: add
documentation of rk3668 clock controller"
(http://lists.infradead.org/pipermail/linux-rockchip/2015-July/003396.html)
for comparison.

> ---
>
> Changes in v2: None
>
> drivers/clk/rockchip/Makefile | 1 +
> drivers/clk/rockchip/clk-rk3036.c | 504
> +++++++++++++++++++++++++++++++++++++ drivers/clk/rockchip/clk.h |
> 30 +++
> 3 files changed, 535 insertions(+)
> create mode 100644 drivers/clk/rockchip/clk-rk3036.c
>
> diff --git a/drivers/clk/rockchip/Makefile b/drivers/clk/rockchip/Makefile
> index b27edd6..d599829 100644
> --- a/drivers/clk/rockchip/Makefile
> +++ b/drivers/clk/rockchip/Makefile
> @@ -10,6 +10,7 @@ obj-y += clk-inverter.o
> obj-y += clk-mmc-phase.o
> obj-$(CONFIG_RESET_CONTROLLER) += softrst.o
>
> +obj-y += clk-rk3036.o
> obj-y += clk-rk3188.o
> obj-y += clk-rk3288.o
> obj-y += clk-rk3368.o
> diff --git a/drivers/clk/rockchip/clk-rk3036.c
> b/drivers/clk/rockchip/clk-rk3036.c new file mode 100644
> index 0000000..724d467
> --- /dev/null
> +++ b/drivers/clk/rockchip/clk-rk3036.c
> @@ -0,0 +1,504 @@
> +/*
> + * Copyright (c) 2014 MundoReader S.L.
> + * Author: Heiko Stuebner <heiko@xxxxxxxxx>
> + *
> + * Copyright (c) 2015 Rockchip Electronics Co. Ltd.
> + * Author: Xing Zheng <zhengxing@xxxxxxxxxxxxxx>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/clk-provider.h>
> +#include <linux/of.h>
> +#include <linux/of_address.h>
> +#include <linux/syscore_ops.h>
> +#include <dt-bindings/clock/rk3036-cru.h>
> +#include "clk.h"
> +
> +enum rk3036_plls {
> + apll, dpll, gpll,
> +};
> +
> +static struct rockchip_pll_rate_table rk3036_pll_rates[] = {
> + /* _mhz, _refdiv, _fbdiv, _postdiv1, _postdiv2, _dsmpd, _frac */
> + RK3036_PLL_RATE(1608000000, 1, 67, 1, 1, 1, 0),
> + RK3036_PLL_RATE(1584000000, 1, 66, 1, 1, 1, 0),
> + RK3036_PLL_RATE(1560000000, 1, 65, 1, 1, 1, 0),
> + RK3036_PLL_RATE(1536000000, 1, 64, 1, 1, 1, 0),
> + RK3036_PLL_RATE(1512000000, 1, 63, 1, 1, 1, 0),
> + RK3036_PLL_RATE(1488000000, 1, 62, 1, 1, 1, 0),
> + RK3036_PLL_RATE(1464000000, 1, 61, 1, 1, 1, 0),
> + RK3036_PLL_RATE(1440000000, 1, 60, 1, 1, 1, 0),
> + RK3036_PLL_RATE(1416000000, 1, 59, 1, 1, 1, 0),
> + RK3036_PLL_RATE(1392000000, 1, 58, 1, 1, 1, 0),
> + RK3036_PLL_RATE(1368000000, 1, 57, 1, 1, 1, 0),
> + RK3036_PLL_RATE(1344000000, 1, 56, 1, 1, 1, 0),
> + RK3036_PLL_RATE(1320000000, 1, 55, 1, 1, 1, 0),
> + RK3036_PLL_RATE(1296000000, 1, 54, 1, 1, 1, 0),
> + RK3036_PLL_RATE(1272000000, 1, 53, 1, 1, 1, 0),
> + RK3036_PLL_RATE(1248000000, 1, 52, 1, 1, 1, 0),
> + RK3036_PLL_RATE(1200000000, 1, 50, 1, 1, 1, 0),
> + RK3036_PLL_RATE(1188000000, 2, 99, 1, 1, 1, 0),
> + RK3036_PLL_RATE(1104000000, 1, 46, 1, 1, 1, 0),
> + RK3036_PLL_RATE(1100000000, 12, 550, 1, 1, 1, 0),
> + RK3036_PLL_RATE(1008000000, 1, 84, 2, 1, 1, 0),
> + RK3036_PLL_RATE(1000000000, 6, 500, 2, 1, 1, 0),
> + RK3036_PLL_RATE( 984000000, 1, 82, 2, 1, 1, 0),
> + RK3036_PLL_RATE( 960000000, 1, 80, 2, 1, 1, 0),
> + RK3036_PLL_RATE( 936000000, 1, 78, 2, 1, 1, 0),
> + RK3036_PLL_RATE( 912000000, 1, 76, 2, 1, 1, 0),
> + RK3036_PLL_RATE( 900000000, 4, 300, 2, 1, 1, 0),
> + RK3036_PLL_RATE( 888000000, 1, 74, 2, 1, 1, 0),
> + RK3036_PLL_RATE( 864000000, 1, 72, 2, 1, 1, 0),
> + RK3036_PLL_RATE( 840000000, 1, 70, 2, 1, 1, 0),
> + RK3036_PLL_RATE( 816000000, 1, 68, 2, 1, 1, 0),
> + RK3036_PLL_RATE( 800000000, 6, 400, 2, 1, 1, 0),
> + RK3036_PLL_RATE( 700000000, 6, 350, 2, 1, 1, 0),
> + RK3036_PLL_RATE( 696000000, 1, 58, 2, 1, 1, 0),
> + RK3036_PLL_RATE( 600000000, 1, 75, 3, 1, 1, 0),
> + RK3036_PLL_RATE( 594000000, 2, 99, 2, 1, 1, 0),
> + RK3036_PLL_RATE( 504000000, 1, 63, 3, 1, 1, 0),
> + RK3036_PLL_RATE( 500000000, 6, 250, 2, 1, 1, 0),
> + RK3036_PLL_RATE( 408000000, 1, 68, 2, 2, 1, 0),
> + RK3036_PLL_RATE( 312000000, 1, 52, 2, 2, 1, 0),
> + RK3036_PLL_RATE( 216000000, 1, 72, 4, 2, 1, 0),
> + RK3036_PLL_RATE( 96000000, 1, 64, 4, 4, 1, 0),
> + RK3036_PLL_RATE(0, 1, 0, 1, 1, 1, 0),

you shouldn't need a "0" rate entry I guess

> + { /* sentinel */ },
> +};
> +
> +#define RK3036_DIV_CPU_MASK 0x1f
> +#define RK3036_DIV_CPU_SHIFT 8
> +
> +#define RK3036_DIV_PERI_MASK 0xf
> +#define RK3036_DIV_PERI_SHIFT 0
> +#define RK3036_DIV_ACLK_MASK 0x7
> +#define RK3036_DIV_ACLK_SHIFT 4
> +#define RK3036_DIV_HCLK_MASK 0x3
> +#define RK3036_DIV_HCLK_SHIFT 8
> +#define RK3036_DIV_PCLK_MASK 0x7
> +#define RK3036_DIV_PCLK_SHIFT 12
> +
> +#define RK3036_CLKSEL1(_core_periph_div) \
> + { \
> + .reg = RK2928_CLKSEL_CON(1), \
> + .val = HIWORD_UPDATE(_core_periph_div, RK3036_DIV_PERI_MASK, \
> + RK3036_DIV_PERI_SHIFT) \
> + }
> +
> +#define RK3036_CPUCLK_RATE(_prate, _core_periph_div) \
> + { \
> + .prate = _prate, \
> + .divs = { \
> + RK3036_CLKSEL1(_core_periph_div), \
> + }, \
> + }
> +
> +static struct rockchip_cpuclk_rate_table rk3036_cpuclk_rates[] __initdata =
> { + RK3036_CPUCLK_RATE(816000000, 4),
> + RK3036_CPUCLK_RATE(600000000, 4),
> + RK3036_CPUCLK_RATE(312000000, 4),
> +};
> +
> +static const struct rockchip_cpuclk_reg_data rk3036_cpuclk_data = {
> + .core_reg = RK2928_CLKSEL_CON(0),
> + .div_core_shift = 0,
> + .div_core_mask = 0x1f,
> + .mux_core_shift = 7,
> +};
> +
> +PNAME(mux_pll_p) = { "xin24m", "xin24m" };

looks like you overlooked the divider? Like

DIV(0, "xin24m_plldiv", "xin24m", 0,
RK2928_CLKSEL_CON(4), 8, 5, DFLAGS),

PNAME(mux_pll_p) = { "xin24m_plldiv", "xin24m" };

> +
> +PNAME(mux_armclk_p) = { "apll", "gpll_armclk" };
> +PNAME(mux_busclk_p) = { "apll", "dpll_cpu", "gpll_cpu" };

[...]

> + /*
> + * Clock-Architecture Diagram 3
> + */
> +
> + /* aclk_cpu gates */
> + GATE(0, "sclk_intmem", "aclk_cpu", CLK_IGNORE_UNUSED,
> RK2928_CLKGATE_CON(4), 12, GFLAGS), + GATE(0, "aclk_strc_sys", "aclk_cpu",
> CLK_IGNORE_UNUSED, RK2928_CLKGATE_CON(4), 10, GFLAGS), +
> + /* hclk_cpu gates */
> + GATE(HCLK_ROM, "hclk_rom", "hclk_cpu", CLK_IGNORE_UNUSED,
> RK2928_CLKGATE_CON(5), 6, GFLAGS), +
> + /* pclk_cpu gates */
> + GATE(PCLK_GRF, "pclk_grf", "pclk_cpu", CLK_IGNORE_UNUSED,
> RK2928_CLKGATE_CON(5), 4, GFLAGS), + GATE(PCLK_DDRUPCTL, "pclk_ddrupctl",
> "pclk_cpu", 0, RK2928_CLKGATE_CON(5), 7, GFLAGS), + GATE(ACLK_VCODEC,
> "pclk_acodec", "pclk_cpu", 0, RK2928_CLKGATE_CON(5), 14, GFLAGS),
> + GATE(PCLK_HDMI, "pclk_hdmi", "pclk_cpu", 0, RK2928_CLKGATE_CON(3), 8,
> GFLAGS), +
> + /* aclk_vio gates */
> + GATE(ACLK_VIO, "aclk_vio", "aclk_disp1_pre", 0,
> + RK2928_CLKGATE_CON(6), 13, GFLAGS),
> + GATE(ACLK_LCDC, "aclk_lcdc", "aclk_disp1_pre", 0,
> + RK2928_CLKGATE_CON(9), 6, GFLAGS),
> +
> + GATE(HCLK_VIO_BUS, "hclk_vio_bus", "hclk_disp_pre", 0,
> + RK2928_CLKGATE_CON(6), 12, GFLAGS),
> + GATE(HCLK_LCDC, "hclk_lcdc", "hclk_disp_pre", 0,
> + RK2928_CLKGATE_CON(9), 5, GFLAGS),
> +
> + /* aclk_video gates */
> + GATE(HCLK_LCDC, "hclk_vcodec", "hclk_disp_pre", 0,
> + RK2928_CLKGATE_CON(3), 12, GFLAGS),

in big gate-block from diagram 3, please stick to the one-line format, like
the rest of the gates here (diagram3 only)

> +
> + /* xin24m gates */
> + GATE(SCLK_PVTM_CORE, "sclk_pvtm_core", "xin24m", 0,
> RK2928_CLKGATE_CON(10), 0, GFLAGS), + GATE(SCLK_PVTM_GPU, "sclk_pvtm_gpu",
> "xin24m", 0, RK2928_CLKGATE_CON(10), 1, GFLAGS), +
> + /* aclk_peri gates */
> + GATE(0, "aclk_peri_axi_matrix", "aclk_peri", CLK_IGNORE_UNUSED,
> RK2928_CLKGATE_CON(4), 3, GFLAGS), + GATE(0, "aclk_cpu_peri", "aclk_peri",
> CLK_IGNORE_UNUSED, RK2928_CLKGATE_CON(4), 2, GFLAGS), + GATE(ACLK_DMAC2,
> "aclk_dmac2", "aclk_peri", 0, RK2928_CLKGATE_CON(5), 1, GFLAGS), + GATE(0,
> "aclk_peri_niu", "aclk_peri", CLK_IGNORE_UNUSED, RK2928_CLKGATE_CON(9), 15,
> GFLAGS), +
> + /* hclk_peri gates */
> + GATE(0, "hclk_peri_matrix", "hclk_peri", CLK_IGNORE_UNUSED,
> RK2928_CLKGATE_CON(4), 0, GFLAGS), + GATE(0, "hclk_usb_peri", "hclk_peri",
> CLK_IGNORE_UNUSED, RK2928_CLKGATE_CON(9), 13, GFLAGS), + GATE(0,
> "hclk_peri_arbi", "hclk_peri", CLK_IGNORE_UNUSED, RK2928_CLKGATE_CON(9),
> 14, GFLAGS), + GATE(HCLK_NANDC, "hclk_nandc", "hclk_peri", 0,
> RK2928_CLKGATE_CON(5), 9, GFLAGS), + GATE(HCLK_SDMMC, "hclk_sdmmc",
> "hclk_peri", 0, RK2928_CLKGATE_CON(5), 10, GFLAGS), + GATE(HCLK_SDIO,
> "hclk_sdio", "hclk_peri", 0, RK2928_CLKGATE_CON(5), 11, GFLAGS),
> + GATE(HCLK_EMMC, "hclk_emmc", "hclk_peri", 0, RK2928_CLKGATE_CON(7), 0,
> GFLAGS), + GATE(HCLK_OTG0, "hclk_otg0", "hclk_peri", CLK_IGNORE_UNUSED,
> RK2928_CLKGATE_CON(5), 13, GFLAGS), + GATE(HCLK_OTG1, "hclk_otg1",
> "hclk_peri", CLK_IGNORE_UNUSED, RK2928_CLKGATE_CON(7), 13, GFLAGS),
> + GATE(HCLK_I2S, "hclk_i2s", "hclk_peri", CLK_IGNORE_UNUSED,
> RK2928_CLKGATE_CON(7), 2, GFLAGS), + GATE(0, "hclk_sfc", "hclk_peri",
> CLK_IGNORE_UNUSED, RK2928_CLKGATE_CON(3), 14, GFLAGS), + GATE(0,
> "hclk_mac", "hclk_peri", CLK_IGNORE_UNUSED, RK2928_CLKGATE_CON(3), 15,
> GFLAGS), +
> + /* pclk_peri gates */
> + GATE(0, "pclk_peri_matrix", "pclk_peri", CLK_IGNORE_UNUSED,
> RK2928_CLKGATE_CON(4), 1, GFLAGS), + GATE(0, "pclk_efuse", "pclk_peri",
> CLK_IGNORE_UNUSED, RK2928_CLKGATE_CON(5), 2, GFLAGS), + GATE(PCLK_TIMER,
> "pclk_timer0", "pclk_peri", 0, RK2928_CLKGATE_CON(7), 7, GFLAGS),
> + GATE(PCLK_PWM, "pclk_pwm", "pclk_peri", 0, RK2928_CLKGATE_CON(7), 10,
> GFLAGS), + GATE(PCLK_SPI, "pclk_spi", "pclk_peri", 0,
> RK2928_CLKGATE_CON(7), 12, GFLAGS), + GATE(PCLK_WDT, "pclk_wdt",
> "pclk_peri", 0, RK2928_CLKGATE_CON(7), 15, GFLAGS), + GATE(PCLK_UART0,
> "pclk_uart0", "pclk_peri", 0, RK2928_CLKGATE_CON(8), 0, GFLAGS),
> + GATE(PCLK_UART1, "pclk_uart1", "pclk_peri", 0, RK2928_CLKGATE_CON(8), 1,
> GFLAGS), + GATE(PCLK_UART2, "pclk_uart2", "pclk_peri", 0,
> RK2928_CLKGATE_CON(8), 2, GFLAGS), + GATE(PCLK_I2C0, "pclk_i2c0",
> "pclk_peri", 0, RK2928_CLKGATE_CON(8), 4, GFLAGS), + GATE(PCLK_I2C1,
> "pclk_i2c1", "pclk_peri", 0, RK2928_CLKGATE_CON(8), 5, GFLAGS),
> + GATE(PCLK_I2C2, "pclk_i2c2", "pclk_peri", 0, RK2928_CLKGATE_CON(8), 6,
> GFLAGS), + GATE(PCLK_GPIO0, "pclk_gpio0", "pclk_peri", 0,
> RK2928_CLKGATE_CON(8), 9, GFLAGS), + GATE(PCLK_GPIO1, "pclk_gpio1",
> "pclk_peri", 0, RK2928_CLKGATE_CON(8), 10, GFLAGS), + GATE(PCLK_GPIO2,
> "pclk_gpio2", "pclk_peri", 0, RK2928_CLKGATE_CON(8), 11, GFLAGS), +};
> +
> +static const char *const rk3036_critical_clocks[] __initconst = {
> + "aclk_cpu",
> + "aclk_peri",
> + "hclk_peri",
> + "pclk_peri",
> +};
> +
> +static void __init rk3036_clk_init(struct device_node *np)
> +{
> + void __iomem *reg_base;
> + struct clk *clk;
> +
> + reg_base = of_iomap(np, 0);
> + if (!reg_base) {
> + pr_err("%s: could not map cru region\n", __func__);
> + return;
> + }
> +
> + rockchip_clk_init(np, reg_base, CLK_NR_CLKS);
> +
> + /* xin12m is created by an cru-internal divider */
> + clk = clk_register_fixed_factor(NULL, "xin12m", "xin24m", 0, 1, 2);
> + if (IS_ERR(clk))
> + pr_warn("%s: could not register clock xin12m: %ld\n",
> + __func__, PTR_ERR(clk));
> +
> + clk = clk_register_fixed_factor(NULL, "usb480m", "xin24m", 0, 20, 1);
> + if (IS_ERR(clk))
> + pr_warn("%s: could not register clock usb480m: %ld\n",
> + __func__, PTR_ERR(clk));
> +
> + clk = clk_register_fixed_factor(NULL, "ddrphy", "ddrphy2x", 0, 1, 2);
> + if (IS_ERR(clk))
> + pr_warn("%s: could not register clock ddrphy: %ld\n",
> + __func__, PTR_ERR(clk));
> +
> + clk = clk_register_fixed_factor(NULL, "hclk_vcodec_pre",
> + "aclk_vcodec", 0, 1, 4);
> + if (IS_ERR(clk))
> + pr_warn("%s: could not register clock hclk_vcodec_pre: %ld\n",
> + __func__, PTR_ERR(clk));
> +
> + clk = clk_register_fixed_factor(NULL, "sclk_macref_out",
> + "hclk_peri_src", 0, 1, 2);
> + if (IS_ERR(clk))
> + pr_warn("%s: could not register clock sclk_macref_out: %ld\n",
> + __func__, PTR_ERR(clk));
> +
> + rockchip_clk_register_plls(rk3036_pll_clks,
> + ARRAY_SIZE(rk3036_pll_clks),
> + -1);
> + rockchip_clk_register_branches(rk3036_clk_branches,
> + ARRAY_SIZE(rk3036_clk_branches));
> + rockchip_clk_protect_critical(rk3036_critical_clocks,
> + ARRAY_SIZE(rk3036_critical_clocks));
> +
> + rockchip_clk_register_armclk(ARMCLK, "armclk",
> + mux_armclk_p, ARRAY_SIZE(mux_armclk_p),
> + &rk3036_cpuclk_data, rk3036_cpuclk_rates,
> + ARRAY_SIZE(rk3036_cpuclk_rates));
> +
> + rockchip_register_softrst(np, 9, reg_base + RK2928_SOFTRST_CON(0),
> + ROCKCHIP_SOFTRST_HIWORD_MASK);
> +
> + rockchip_register_restart_notifier(RK2928_GLB_SRST_FST);
> +}
> +CLK_OF_DECLARE(rk3036_cru, "rockchip,rk3036-cru", rk3036_clk_init);
> diff --git a/drivers/clk/rockchip/clk.h b/drivers/clk/rockchip/clk.h
> index dc8ecb2..6603c07 100644
> --- a/drivers/clk/rockchip/clk.h
> +++ b/drivers/clk/rockchip/clk.h
> @@ -2,6 +2,9 @@
> * Copyright (c) 2014 MundoReader S.L.
> * Author: Heiko Stuebner <heiko@xxxxxxxxx>
> *
> + * Copyright (c) 2015 Rockchip Electronics Co. Ltd.
> + * Author: Xing Zheng <zhengxing@xxxxxxxxxxxxxx>
> + *
> * based on
> *
> * samsung/clk.h
> @@ -40,6 +43,13 @@ struct clk;
> #define RK2928_SOFTRST_CON(x) ((x) * 0x4 + 0x110)
> #define RK2928_MISC_CON 0x134
>
> +#define RK3036_SDMMC_CON0 0x144
> +#define RK3036_SDMMC_CON1 0x148
> +#define RK3036_SDIO_CON0 0x14c
> +#define RK3036_SDIO_CON1 0x150
> +#define RK3036_EMMC_CON0 0x154
> +#define RK3036_EMMC_CON1 0x158
> +
> #define RK3288_PLL_CON(x) RK2928_PLL_CON(x)
> #define RK3288_MODE_CON 0x50
> #define RK3288_CLKSEL_CON(x) ((x) * 0x4 + 0x60)
> @@ -75,6 +85,7 @@ struct clk;
>
> enum rockchip_pll_type {
> pll_rk3066,
> + pll_rk3036,

this should be part of the addition of the pll type (your patch4, and should
be reordered accordingly)

Also please all 3036 before the 3066 entry

> };
>
> #define RK3066_PLL_RATE(_rate, _nr, _nf, _no) \
> @@ -95,12 +106,31 @@ enum rockchip_pll_type {
> .nb = _nb, \
> }
>
> +#define RK3036_PLL_RATE(_rate, _refdiv, _fbdiv, _postdiv1, \
> + _postdiv2, _dsmpd, _frac) \
> +{ \
> + .rate = _rate##U, \
> + .fbdiv = _fbdiv, \
> + .postdiv1 = _postdiv1, \
> + .refdiv = _refdiv, \
> + .postdiv2 = _postdiv2, \
> + .dsmpd = _dsmpd, \
> + .frac = _frac, \
> +}
> +
> struct rockchip_pll_rate_table {
> unsigned long rate;
> unsigned int nr;
> unsigned int nf;
> unsigned int no;
> unsigned int nb;
> + /* for RK3036 */
> + unsigned int fbdiv;
> + unsigned int postdiv1;
> + unsigned int refdiv;
> + unsigned int postdiv2;
> + unsigned int dsmpd;
> + unsigned int frac;

same for these 2 ... should be part of the pll addition itself

> };
>
> /**

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Next message: Michael Ellerman: "Re: [PATCH] arch-powerpc: Return false instead of -EFAULT"
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