[U-Boot] [PATCH v2 1/2] rk3399: add basic soc driver

Jaehoon Chung
2016-07-29T08:00:52Z

Hi Kever,

On 07/29/2016 11:35 AM, Kever Yang wrote:
> This patch add driver for:
> - clock driver including set_rate for cpu, mmc, vop, I2C.
> - sysreset driver
> - grf syscon driver
>
> Signed-off-by: Kever Yang <kever.yang@rock-chips.com>

I don't have a knowledge for rockchip..So i don't add the comments relevant to rockchip.
Just add the general comments.

> ---
>
> Changes in v2:
> - include '_SHIFT_' in '_MASK' MACRO
> - fix comment style
> - use DIV_ROUND_UP instead of div_round_up
> - use uclass_get_device_by_driver in rockchip_get_cru
> - implement ofdata_to_platdata for priv->cru init
>
> arch/arm/include/asm/arch-rockchip/cru_rk3399.h | 93 +++
> arch/arm/mach-rockchip/rk3399/Makefile | 2 +
> arch/arm/mach-rockchip/rk3399/reset_rk3399.c | 45 ++
> arch/arm/mach-rockchip/rk3399/syscon_rk3399.c | 20 +
> drivers/clk/Makefile | 1 +
> drivers/clk/clk_rk3399.c | 819 ++++++++++++++++++++++++
> 6 files changed, 980 insertions(+)
> create mode 100644 arch/arm/include/asm/arch-rockchip/cru_rk3399.h
> create mode 100644 arch/arm/mach-rockchip/rk3399/reset_rk3399.c
> create mode 100644 arch/arm/mach-rockchip/rk3399/syscon_rk3399.c
> create mode 100644 drivers/clk/clk_rk3399.c
>
> diff --git a/arch/arm/include/asm/arch-rockchip/cru_rk3399.h b/arch/arm/include/asm/arch-rockchip/cru_rk3399.h
> new file mode 100644
> index 0000000..c919f47
> --- /dev/null
> +++ b/arch/arm/include/asm/arch-rockchip/cru_rk3399.h
> @@ -0,0 +1,93 @@
> +/*
> + * (C) Copyright 2016 Rockchip Electronics Co., Ltd
> + *
> + * SPDX-License-Identifier: GPL-2.0+
> + */
> +
> +#ifndef __ASM_ARCH_CRU_RK3399_H_
> +#define __ASM_ARCH_CRU_RK3399_H_
> +
> +#include <common.h>
> +
> +struct rk3399_pmucru {
> + u32 ppll_con[6];
> + u32 reserved[0x1a];
> + u32 pmucru_clksel[6];
> + u32 pmucru_clkfrac_con[2];
> + u32 reserved2[0x18];
> + u32 pmucru_clkgate_con[3];
> + u32 reserved3;
> + u32 pmucru_softrst_con[2];
> + u32 reserved4[2];
> + u32 pmucru_rstnhold_con[2];
> + u32 reserved5[2];
> + u32 pmucru_gatedis_con[2];
> +};
> +check_member(rk3399_pmucru, pmucru_gatedis_con[1], 0x134);
> +
> +struct rk3399_cru {
> + u32 apll_l_con[6];
> + u32 reserved[2];
> + u32 apll_b_con[6];
> + u32 reserved1[2];
> + u32 dpll_con[6];
> + u32 reserved2[2];
> + u32 cpll_con[6];
> + u32 reserved3[2];
> + u32 gpll_con[6];
> + u32 reserved4[2];
> + u32 npll_con[6];
> + u32 reserved5[2];
> + u32 vpll_con[6];
> + u32 reserved6[0x0a];
> + u32 clksel_con[108];
> + u32 reserved7[0x14];
> + u32 clkgate_con[35];
> + u32 reserved8[0x1d];
> + u32 softrst_con[21];
> + u32 reserved9[0x2b];
> + u32 glb_srst_fst_value;
> + u32 glb_srst_snd_value;
> + u32 glb_cnt_th;
> + u32 misc_con;
> + u32 glb_rst_con;
> + u32 glb_rst_st;
> + u32 reserved10[0x1a];
> + u32 sdmmc_con[2];
> + u32 sdio0_con[2];
> + u32 sdio1_con[2];
> +};
> +check_member(rk3399_cru, sdio1_con[1], 0x594);
> +#define MHz 1000000
> +#define KHz 1000
> +#define OSC_HZ (24*MHz)
> +#define APLL_HZ (600*MHz)
> +#define GPLL_HZ (594*MHz)
> +#define CPLL_HZ (384*MHz)
> +#define PPLL_HZ (594*MHz)
> +
> +#define PMU_PCLK_HZ (99*MHz)
> +
> +#define ACLKM_CORE_HZ (300*MHz)
> +#define ATCLK_CORE_HZ (300*MHz)
> +#define PCLK_DBG_HZ (100*MHz)
> +
> +#define PERIHP_ACLK_HZ (148500*KHz)
> +#define PERIHP_HCLK_HZ (148500*KHz)
> +#define PERIHP_PCLK_HZ (37125*KHz)
> +
> +#define PERILP0_ACLK_HZ (99000*KHz)
> +#define PERILP0_HCLK_HZ (99000*KHz)
> +#define PERILP0_PCLK_HZ (49500*KHz)
> +
> +#define PERILP1_HCLK_HZ (99000*KHz)
> +#define PERILP1_PCLK_HZ (49500*KHz)
> +
> +#define PWM_CLOCK_HZ PMU_PCLK_HZ
> +
> +enum apll_l_frequencies {
> + APLL_L_1600_MHZ,
> + APLL_L_600_MHZ,
> +};
> +
> +#endif /* __ASM_ARCH_CRU_RK3399_H_ */
> diff --git a/arch/arm/mach-rockchip/rk3399/Makefile b/arch/arm/mach-rockchip/rk3399/Makefile
> index 3f219ac..3ca2028 100644
> --- a/arch/arm/mach-rockchip/rk3399/Makefile
> +++ b/arch/arm/mach-rockchip/rk3399/Makefile
> @@ -5,3 +5,5 @@
> #
>
> obj-y += rk3399.o
> +obj-y += reset_rk3399.o
> +obj-y += syscon_rk3399.o
> diff --git a/arch/arm/mach-rockchip/rk3399/reset_rk3399.c b/arch/arm/mach-rockchip/rk3399/reset_rk3399.c
> new file mode 100644
> index 0000000..9a55546
> --- /dev/null
> +++ b/arch/arm/mach-rockchip/rk3399/reset_rk3399.c
> @@ -0,0 +1,45 @@
> +/*
> + * (C) Copyright 2016 Rockchip Electronics Co., Ltd
> + *
> + * SPDX-License-Identifier: GPL-2.0
> + */
> +
> +#include <common.h>
> +#include <dm.h>
> +#include <errno.h>
> +#include <sysreset.h>
> +#include <asm/io.h>
> +#include <asm/arch/clock.h>
> +#include <asm/arch/cru_rk3399.h>
> +#include <asm/arch/hardware.h>
> +#include <linux/err.h>
> +
> +int rk3399_sysreset_request(struct udevice *dev, enum sysreset_t type)
> +{
> + struct rk3399_cru *cru = rockchip_get_cru();
> +
> + if (IS_ERR(cru))
> + return PTR_ERR(cru);
> + switch (type) {
> + case SYSRESET_WARM:
> + writel(0xeca8, &cru->glb_srst_snd_value);
> + break;
> + case SYSRESET_COLD:
> + writel(0xfdb9, &cru->glb_srst_fst_value);
> + break;
> + default:
> + return -EPROTONOSUPPORT;
> + }
> +
> + return -EINPROGRESS;
> +}
> +
> +static struct sysreset_ops rk3399_sysreset = {
> + .request = rk3399_sysreset_request,
> +};
> +
> +U_BOOT_DRIVER(sysreset_rk3399) = {
> + .name = "rk3399_sysreset",
> + .id = UCLASS_SYSRESET,
> + .ops = &rk3399_sysreset,
> +};
> diff --git a/arch/arm/mach-rockchip/rk3399/syscon_rk3399.c b/arch/arm/mach-rockchip/rk3399/syscon_rk3399.c
> new file mode 100644
> index 0000000..2d81c55
> --- /dev/null
> +++ b/arch/arm/mach-rockchip/rk3399/syscon_rk3399.c
> @@ -0,0 +1,20 @@
> +/*
> + * (C) Copyright 2016 Rockchip Electronics Co., Ltd
> + *
> + * SPDX-License-Identifier: GPL-2.0+
> + */
> +
> +#include <common.h>
> +#include <dm.h>
> +#include <syscon.h>
> +#include <asm/arch/clock.h>
> +
> +static const struct udevice_id rk3399_syscon_ids[] = {
> + { .compatible = "rockchip,rk3399-grf", .data = ROCKCHIP_SYSCON_GRF },
> +};
> +
> +U_BOOT_DRIVER(syscon_rk3399) = {
> + .name = "rk3399_syscon",
> + .id = UCLASS_SYSCON,
> + .of_match = rk3399_syscon_ids,
> +};
> diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
> index f7a8891..e20e932 100644
> --- a/drivers/clk/Makefile
> +++ b/drivers/clk/Makefile
> @@ -8,6 +8,7 @@
> obj-$(CONFIG_CLK) += clk-uclass.o clk_fixed_rate.o
> obj-$(CONFIG_ROCKCHIP_RK3036) += clk_rk3036.o
> obj-$(CONFIG_ROCKCHIP_RK3288) += clk_rk3288.o
> +obj-$(CONFIG_ROCKCHIP_RK3399) += clk_rk3399.o
> obj-$(CONFIG_SANDBOX) += clk_sandbox.o
> obj-$(CONFIG_SANDBOX) += clk_sandbox_test.o
> obj-$(CONFIG_MACH_PIC32) += clk_pic32.o
> diff --git a/drivers/clk/clk_rk3399.c b/drivers/clk/clk_rk3399.c
> new file mode 100644
> index 0000000..c0bb80c
> --- /dev/null
> +++ b/drivers/clk/clk_rk3399.c
> @@ -0,0 +1,819 @@
> +/*
> + * (C) Copyright 2015 Google, Inc
> + *
> + * SPDX-License-Identifier: GPL-2.0
> + */
> +
> +#include <common.h>
> +#include <clk-uclass.h>
> +#include <dm.h>
> +#include <errno.h>
> +#include <syscon.h>
> +#include <asm/io.h>
> +#include <asm/arch/clock.h>
> +#include <asm/arch/cru_rk3399.h>
> +#include <asm/arch/hardware.h>
> +#include <dm/lists.h>
> +#include <dt-bindings/clock/rk3399-cru.h>
> +
> +DECLARE_GLOBAL_DATA_PTR;
> +
> +struct rk3399_clk_priv {
> + struct rk3399_cru *cru;
> + ulong rate;
> +};
> +
> +struct pll_div {
> + u32 refdiv;
> + u32 fbdiv;
> + u32 postdiv1;
> + u32 postdiv2;
> + u32 frac;
> +};
> +
> +#define RATE_TO_DIV(input_rate, output_rate) \
> + ((input_rate) / (output_rate) - 1);
> +#define DIV_TO_RATE(input_rate, div) ((input_rate) / ((div) + 1))
> +
> +#define PLL_DIVISORS(hz, _refdiv, _postdiv1, _postdiv2) {\
> + .refdiv = _refdiv,\
> + .fbdiv = (u32)((u64)hz * _refdiv * _postdiv1 * _postdiv2 / OSC_HZ),\
> + .postdiv1 = _postdiv1, .postdiv2 = _postdiv2};
> +
> +static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 2, 2, 1);
> +static const struct pll_div cpll_init_cfg = PLL_DIVISORS(CPLL_HZ, 1, 2, 2);
> +static const struct pll_div ppll_init_cfg = PLL_DIVISORS(PPLL_HZ, 2, 2, 1);
> +
> +static const struct pll_div apll_l_1600_cfg = PLL_DIVISORS(1600*MHz, 3, 1, 1);
> +static const struct pll_div apll_l_600_cfg = PLL_DIVISORS(600*MHz, 1, 2, 1);
> +
> +static const struct pll_div *apll_l_cfgs[] = {
> + [APLL_L_1600_MHZ] = &apll_l_1600_cfg,
> + [APLL_L_600_MHZ] = &apll_l_600_cfg,
> +};
> +
> +enum {
> + /* PLL_CON0 */
> + PLL_FBDIV_MASK = 0xfff,
> + PLL_FBDIV_SHIFT = 0,
> +
> + /* PLL_CON1 */
> + PLL_POSTDIV2_SHIFT = 12,
> + PLL_POSTDIV2_MASK = 0x7 << PLL_POSTDIV2_SHIFT,
> + PLL_POSTDIV1_SHIFT = 8,
> + PLL_POSTDIV1_MASK = 0x7 << PLL_POSTDIV1_SHIFT,
> + PLL_REFDIV_MASK = 0x3f,
> + PLL_REFDIV_SHIFT = 0,
> +
> + /* PLL_CON2 */
> + PLL_LOCK_STATUS_SHIFT = 31,
> + PLL_LOCK_STATUS_MASK = 1 << PLL_LOCK_STATUS_SHIFT,
> + PLL_FRACDIV_MASK = 0xffffff,
> + PLL_FRACDIV_SHIFT = 0,
> +
> + /* PLL_CON3 */
> + PLL_MODE_SHIFT = 8,
> + PLL_MODE_MASK = 3 << PLL_MODE_SHIFT,
> + PLL_MODE_SLOW = 0,
> + PLL_MODE_NORM,
> + PLL_MODE_DEEP,
> + PLL_DSMPD_SHIFT = 3,
> + PLL_DSMPD_MASK = 1 << PLL_DSMPD_SHIFT,
> + PLL_INTEGER_MODE = 1,
> +
> + /* PMUCRU_CLKSEL_CON0 */
> + PMU_PCLK_DIV_CON_MASK = 0x1f,
> + PMU_PCLK_DIV_CON_SHIFT = 0,
> +
> + /* PMUCRU_CLKSEL_CON1 */
> + SPI3_PLL_SEL_SHIFT = 7,
> + SPI3_PLL_SEL_MASK = 1 << SPI3_PLL_SEL_SHIFT,
> + SPI3_PLL_SEL_24M = 0,
> + SPI3_PLL_SEL_PPLL = 1,
> + SPI3_DIV_CON_SHIFT = 0x0,
> + SPI3_DIV_CON_MASK = 0x7f,
> +
> + /* PMUCRU_CLKSEL_CON2 */
> + I2C_DIV_CON_MASK = 0x7f,
> + I2C8_DIV_CON_SHIFT = 8,
> + I2C0_DIV_CON_SHIFT = 0,
> +
> + /* PMUCRU_CLKSEL_CON3 */
> + I2C4_DIV_CON_SHIFT = 0,
> +
> + /* CLKSEL_CON0 */
> + ACLKM_CORE_L_DIV_CON_SHIFT = 8,
> + ACLKM_CORE_L_DIV_CON_MASK = 0x1f << ACLKM_CORE_L_DIV_CON_SHIFT,
> + CLK_CORE_L_PLL_SEL_SHIFT = 6,
> + CLK_CORE_L_PLL_SEL_MASK = 3 << CLK_CORE_L_PLL_SEL_SHIFT,
> + CLK_CORE_L_PLL_SEL_ALPLL = 0x0,
> + CLK_CORE_L_PLL_SEL_ABPLL = 0x1,
> + CLK_CORE_L_PLL_SEL_DPLL = 0x10,
> + CLK_CORE_L_PLL_SEL_GPLL = 0x11,
> + CLK_CORE_L_DIV_MASK = 0x1f,
> + CLK_CORE_L_DIV_SHIFT = 0,
> +
> + /* CLKSEL_CON1 */
> + PCLK_DBG_L_DIV_SHIFT = 0x8,
> + PCLK_DBG_L_DIV_MASK = 0x1f << PCLK_DBG_L_DIV_SHIFT,
> + ATCLK_CORE_L_DIV_SHIFT = 0,
> + ATCLK_CORE_L_DIV_MASK = 0x1f << ATCLK_CORE_L_DIV_SHIFT,
> +
> + /* CLKSEL_CON14 */
> + PCLK_PERIHP_DIV_CON_SHIFT = 12,
> + PCLK_PERIHP_DIV_CON_MASK = 0x7 << PCLK_PERIHP_DIV_CON_SHIFT,
> + HCLK_PERIHP_DIV_CON_SHIFT = 8,
> + HCLK_PERIHP_DIV_CON_MASK = 3 << HCLK_PERIHP_DIV_CON_SHIFT,
> + ACLK_PERIHP_PLL_SEL_SHIFT = 7,
> + ACLK_PERIHP_PLL_SEL_MASK = 1 << ACLK_PERIHP_PLL_SEL_SHIFT,
> + ACLK_PERIHP_PLL_SEL_CPLL = 0,
> + ACLK_PERIHP_PLL_SEL_GPLL = 1,
> + ACLK_PERIHP_DIV_CON_SHIFT = 0,
> + ACLK_PERIHP_DIV_CON_MASK = 0x1f,
> +
> + /* CLKSEL_CON21 */
> + ACLK_EMMC_PLL_SEL_SHIFT = 7,
> + ACLK_EMMC_PLL_SEL_MASK = 0x1 << ACLK_EMMC_PLL_SEL_SHIFT,
> + ACLK_EMMC_PLL_SEL_GPLL = 0x1,
> + ACLK_EMMC_DIV_CON_SHIFT = 0,
> + ACLK_EMMC_DIV_CON_MASK = 0x1f,
> +
> + /* CLKSEL_CON22 */
> + CLK_EMMC_PLL_SHIFT = 8,
> + CLK_EMMC_PLL_MASK = 0x7 << CLK_EMMC_PLL_SHIFT,
> + CLK_EMMC_PLL_SEL_GPLL = 0x1,
> + CLK_EMMC_DIV_CON_SHIFT = 0,
> + CLK_EMMC_DIV_CON_MASK = 0x7f << CLK_EMMC_DIV_CON_SHIFT,
> +
> + /* CLKSEL_CON23 */
> + PCLK_PERILP0_DIV_CON_SHIFT = 12,
> + PCLK_PERILP0_DIV_CON_MASK = 0x7 << PCLK_PERILP0_DIV_CON_SHIFT,
> + HCLK_PERILP0_DIV_CON_SHIFT = 8,
> + HCLK_PERILP0_DIV_CON_MASK = 3 << HCLK_PERILP0_DIV_CON_SHIFT,
> + ACLK_PERILP0_PLL_SEL_SHIFT = 7,
> + ACLK_PERILP0_PLL_SEL_MASK = 1 << ACLK_PERILP0_PLL_SEL_SHIFT,
> + ACLK_PERILP0_PLL_SEL_CPLL = 0,
> + ACLK_PERILP0_PLL_SEL_GPLL = 1,
> + ACLK_PERILP0_DIV_CON_SHIFT = 0,
> + ACLK_PERILP0_DIV_CON_MASK = 0x1f,
> +
> + /* CLKSEL_CON25 */
> + PCLK_PERILP1_DIV_CON_SHIFT = 8,
> + PCLK_PERILP1_DIV_CON_MASK = 0x7 << PCLK_PERILP1_DIV_CON_SHIFT,
> + HCLK_PERILP1_PLL_SEL_SHIFT = 7,
> + HCLK_PERILP1_PLL_SEL_MASK = 1 << HCLK_PERILP1_PLL_SEL_SHIFT,
> + HCLK_PERILP1_PLL_SEL_CPLL = 0,
> + HCLK_PERILP1_PLL_SEL_GPLL = 1,
> + HCLK_PERILP1_DIV_CON_SHIFT = 0,
> + HCLK_PERILP1_DIV_CON_MASK = 0x1f,
> +
> + /* CLKSEL_CON26 */
> + CLK_SARADC_DIV_CON_SHIFT = 8,
> + CLK_SARADC_DIV_CON_MASK = 0xff << CLK_SARADC_DIV_CON_SHIFT,
> +
> + /* CLKSEL_CON27 */
> + CLK_TSADC_SEL_X24M = 0x0,
> + CLK_TSADC_SEL_SHIFT = 15,
> + CLK_TSADC_SEL_MASK = 1 << CLK_TSADC_SEL_SHIFT,
> + CLK_TSADC_DIV_CON_SHIFT = 0,
> + CLK_TSADC_DIV_CON_MASK = 0x3ff,
> +
> + /* CLKSEL_CON47 & CLKSEL_CON48 */
> + ACLK_VOP_PLL_SEL_SHIFT = 6,
> + ACLK_VOP_PLL_SEL_MASK = 0x3 << ACLK_VOP_PLL_SEL_SHIFT,
> + ACLK_VOP_PLL_SEL_CPLL = 0x1,
> + ACLK_VOP_DIV_CON_SHIFT = 0,
> + ACLK_VOP_DIV_CON_MASK = 0x1f << ACLK_VOP_DIV_CON_SHIFT,
> +
> + /* CLKSEL_CON49 & CLKSEL_CON50 */
> + DCLK_VOP_DCLK_SEL_SHIFT = 11,
> + DCLK_VOP_DCLK_SEL_MASK = 1 << DCLK_VOP_DCLK_SEL_SHIFT,
> + DCLK_VOP_DCLK_SEL_DIVOUT = 0,
> + DCLK_VOP_PLL_SEL_SHIFT = 8,
> + DCLK_VOP_PLL_SEL_MASK = 3 << DCLK_VOP_PLL_SEL_SHIFT,
> + DCLK_VOP_PLL_SEL_VPLL = 0,
> + DCLK_VOP_DIV_CON_MASK = 0xff,
> + DCLK_VOP_DIV_CON_SHIFT = 0,
> +
> + /* CLKSEL_CON58 */
> + CLK_SPI_PLL_SEL_MASK = 1,
> + CLK_SPI_PLL_SEL_CPLL = 0,
> + CLK_SPI_PLL_SEL_GPLL = 1,
> + CLK_SPI_PLL_DIV_CON_MASK = 0x7f,
> + CLK_SPI5_PLL_DIV_CON_SHIFT = 8,
> + CLK_SPI5_PLL_SEL_SHIFT = 15,
> +
> + /* CLKSEL_CON59 */
> + CLK_SPI1_PLL_SEL_SHIFT = 15,
> + CLK_SPI1_PLL_DIV_CON_SHIFT = 8,
> + CLK_SPI0_PLL_SEL_SHIFT = 7,
> + CLK_SPI0_PLL_DIV_CON_SHIFT = 0,
> +
> + /* CLKSEL_CON60 */
> + CLK_SPI4_PLL_SEL_SHIFT = 15,
> + CLK_SPI4_PLL_DIV_CON_SHIFT = 8,
> + CLK_SPI2_PLL_SEL_SHIFT = 7,
> + CLK_SPI2_PLL_DIV_CON_SHIFT = 0,
> +
> + /* CLKSEL_CON61 */
> + CLK_I2C_PLL_SEL_MASK = 1,
> + CLK_I2C_PLL_SEL_CPLL = 0,
> + CLK_I2C_PLL_SEL_GPLL = 1,
> + CLK_I2C5_PLL_SEL_SHIFT = 15,
> + CLK_I2C5_DIV_CON_SHIFT = 8,
> + CLK_I2C1_PLL_SEL_SHIFT = 7,
> + CLK_I2C1_DIV_CON_SHIFT = 0,
> +
> + /* CLKSEL_CON62 */
> + CLK_I2C6_PLL_SEL_SHIFT = 15,
> + CLK_I2C6_DIV_CON_SHIFT = 8,
> + CLK_I2C2_PLL_SEL_SHIFT = 7,
> + CLK_I2C2_DIV_CON_SHIFT = 0,
> +
> + /* CLKSEL_CON63 */
> + CLK_I2C7_PLL_SEL_SHIFT = 15,
> + CLK_I2C7_DIV_CON_SHIFT = 8,
> + CLK_I2C3_PLL_SEL_SHIFT = 7,
> + CLK_I2C3_DIV_CON_SHIFT = 0,
> +
> + /* CRU_SOFTRST_CON4 */
> + RESETN_DDR0_REQ_SHIFT = 8,
> + RESETN_DDR0_REQ_MASK = 1 << RESETN_DDR0_REQ_SHIFT,
> + RESETN_DDRPHY0_REQ_SHIFT = 9,
> + RESETN_DDRPHY0_REQ_MASK = 1 << RESETN_DDRPHY0_REQ_SHIFT,
> + RESETN_DDR1_REQ_SHIFT = 12,
> + RESETN_DDR1_REQ_MASK = 1 << RESETN_DDR1_REQ_SHIFT,
> + RESETN_DDRPHY1_REQ_SHIFT = 13,
> + RESETN_DDRPHY1_REQ_MASK = 1 << RESETN_DDRPHY1_REQ_SHIFT,
> +};
> +
> +#define VCO_MAX_KHZ (3200 * (MHz / KHz))
> +#define VCO_MIN_KHZ (800 * (MHz / KHz))
> +#define OUTPUT_MAX_KHZ (3200 * (MHz / KHz))
> +#define OUTPUT_MIN_KHZ (16 * (MHz / KHz))
> +
> +/*
> + * the div restructions of pll in integer mode, these are defined in
> + * * CRU_*PLL_CON0 or PMUCRU_*PLL_CON0
> + */
> +#define PLL_DIV_MIN 16
> +#define PLL_DIV_MAX 3200
> +
> +/*
> + * How to calculate the PLL(from TRM V0.3 Part 1 Page 63):
> + * Formulas also embedded within the Fractional PLL Verilog model:
> + * If DSMPD = 1 (DSM is disabled, "integer mode")
> + * FOUTVCO = FREF / REFDIV * FBDIV
> + * FOUTPOSTDIV = FOUTVCO / POSTDIV1 / POSTDIV2
> + * Where:
> + * FOUTVCO = Fractional PLL non-divided output frequency
> + * FOUTPOSTDIV = Fractional PLL divided output frequency
> + * (output of second post divider)
> + * FREF = Fractional PLL input reference frequency, (the OSC_HZ 24MHz input)
> + * REFDIV = Fractional PLL input reference clock divider
> + * FBDIV = Integer value programmed into feedback divide
> + *
> + */
> +static void rkclk_set_pll(u32 *pll_con, const struct pll_div *div)
> +{
> + /* All 8 PLLs have same VCO and output frequency range restrictions. */
> + u32 vco_khz = OSC_HZ / 1000 * div->fbdiv / div->refdiv;
> + u32 output_khz = vco_khz / div->postdiv1 / div->postdiv2;
> +
> + debug("PLL at %p: fbdiv=%d, refdiv=%d, postdiv1=%d, "
> + "postdiv2=%d, vco=%u khz, output=%u khz\n",
> + pll_con, div->fbdiv, div->refdiv, div->postdiv1,
> + div->postdiv2, vco_khz, output_khz);
> + assert(vco_khz >= VCO_MIN_KHZ && vco_khz <= VCO_MAX_KHZ &&
> + output_khz >= OUTPUT_MIN_KHZ && output_khz <= OUTPUT_MAX_KHZ &&
> + div->fbdiv >= PLL_DIV_MIN && div->fbdiv <= PLL_DIV_MAX);
> +
> + /*
> + * When power on or changing PLL setting,
> + * we must force PLL into slow mode to ensure output stable clock.
> + */
> + rk_clrsetreg(&pll_con[3], PLL_MODE_MASK,
> + PLL_MODE_SLOW << PLL_MODE_SHIFT);
> +
> + /* use integer mode */
> + rk_clrsetreg(&pll_con[3], PLL_DSMPD_MASK,
> + PLL_INTEGER_MODE << PLL_DSMPD_SHIFT);
> +
> + rk_clrsetreg(&pll_con[0], PLL_FBDIV_MASK,
> + div->fbdiv << PLL_FBDIV_SHIFT);
> + rk_clrsetreg(&pll_con[1],
> + PLL_POSTDIV2_MASK | PLL_POSTDIV1_MASK |
> + PLL_REFDIV_MASK | PLL_REFDIV_SHIFT,
> + (div->postdiv2 << PLL_POSTDIV2_SHIFT) |
> + (div->postdiv1 << PLL_POSTDIV1_SHIFT) |
> + (div->refdiv << PLL_REFDIV_SHIFT));
> +
> + /* waiting for pll lock */
> + while (!(readl(&pll_con[2]) & (1 << PLL_LOCK_STATUS_SHIFT)))
> + udelay(1);
> +
> + /* pll enter normal mode */
> + rk_clrsetreg(&pll_con[3], PLL_MODE_MASK,
> + PLL_MODE_NORM << PLL_MODE_SHIFT);
> +}
> +
> +static int pll_para_config(u32 freq_hz, struct pll_div *div)
> +{
> + u32 ref_khz = OSC_HZ / KHz, refdiv, fbdiv = 0;
> + u32 postdiv1, postdiv2 = 1;
> + u32 fref_khz;
> + u32 diff_khz, best_diff_khz;
> + const u32 max_refdiv = 63, max_fbdiv = 3200, min_fbdiv = 16;
> + const u32 max_postdiv1 = 7, max_postdiv2 = 7;

As i know, it recommends not to use the magin number.
Is it possible to get from devicetree? otherwise how about defining in header file?
It's my preference. :)

> + u32 vco_khz;
> + u32 freq_khz = freq_hz / KHz;
> +
> + if (!freq_hz) {
> + printf("%s: the frequency can't be 0 Hz\n", __func__);
> + return -1;

Use the error number. -EINVAL?

> + }
> +
> + postdiv1 = DIV_ROUND_UP(VCO_MIN_KHZ, freq_khz);
> + if (postdiv1 > max_postdiv1) {
> + postdiv2 = DIV_ROUND_UP(postdiv1, max_postdiv1);
> + postdiv1 = DIV_ROUND_UP(postdiv1, postdiv2);
> + }
> +
> + vco_khz = freq_khz * postdiv1 * postdiv2;
> +
> + if (vco_khz < VCO_MIN_KHZ || vco_khz > VCO_MAX_KHZ ||
> + postdiv2 > max_postdiv2) {
> + printf("%s: Cannot find out a supported VCO"
> + " for Frequency (%uHz).\n", __func__, freq_hz);
> + return -1;

Ditto. error number.

> + }
> +
> + div->postdiv1 = postdiv1;
> + div->postdiv2 = postdiv2;
> +
> + best_diff_khz = vco_khz;
> + for (refdiv = 1; refdiv < max_refdiv && best_diff_khz; refdiv++) {
> + fref_khz = ref_khz / refdiv;
> +
> + fbdiv = vco_khz / fref_khz;
> + if ((fbdiv >= max_fbdiv) || (fbdiv <= min_fbdiv))
> + continue;
> + diff_khz = vco_khz - fbdiv * fref_khz;
> + if (fbdiv + 1 < max_fbdiv && diff_khz > fref_khz / 2) {
> + fbdiv++;
> + diff_khz = fref_khz - diff_khz;
> + }
> +
> + if (diff_khz >= best_diff_khz)
> + continue;
> +
> + best_diff_khz = diff_khz;
> + div->refdiv = refdiv;
> + div->fbdiv = fbdiv;
> + }
> +
> + if (best_diff_khz > 4 * (MHz/KHz)) {
> + printf("%s: Failed to match output frequency %u, "
> + "difference is %u Hz,exceed 4MHZ\n", __func__, freq_hz,
> + best_diff_khz * KHz);
> + return -1;

Ditto

> + }
> + return 0;
> +}
> +
> +static void rkclk_init(struct rk3399_cru *cru)
> +{
> + u32 aclk_div;
> + u32 hclk_div;
> + u32 pclk_div;

Make One line.

> +
> + /*
> + * some cru registers changed by bootrom, we'd better reset them to
> + * reset/default values described in TRM to avoid confusion in kernel.
> + * Please consider these three lines as a fix of bootrom bug.
> + */
> + rk_clrsetreg(&cru->clksel_con[12], 0xffff, 0x4101);
> + rk_clrsetreg(&cru->clksel_con[19], 0xffff, 0x033f);
> + rk_clrsetreg(&cru->clksel_con[56], 0x0003, 0x0003);

Can not use the clearbits_le32()/setbit_be32()/clrsetbit_le32()?
I'm not sure but you can check the io.h.

> +
> + /* configure gpll cpll */
> + rkclk_set_pll(&cru->gpll_con[0], &gpll_init_cfg);
> + rkclk_set_pll(&cru->cpll_con[0], &cpll_init_cfg);
> +
> + /* configure perihp aclk, hclk, pclk */
> + aclk_div = GPLL_HZ / PERIHP_ACLK_HZ - 1;
> + assert((aclk_div + 1) * PERIHP_ACLK_HZ == GPLL_HZ && aclk_div < 0x1f);
> +
> + hclk_div = PERIHP_ACLK_HZ / PERIHP_HCLK_HZ - 1;
> + assert((hclk_div + 1) * PERIHP_HCLK_HZ ==
> + PERIHP_ACLK_HZ && (hclk_div < 0x4));
> +
> + pclk_div = PERIHP_ACLK_HZ / PERIHP_PCLK_HZ - 1;
> + assert((pclk_div + 1) * PERIHP_PCLK_HZ ==
> + PERIHP_ACLK_HZ && (pclk_div < 0x7));
> +
> + rk_clrsetreg(&cru->clksel_con[14],
> + PCLK_PERIHP_DIV_CON_MASK | HCLK_PERIHP_DIV_CON_MASK |
> + ACLK_PERIHP_PLL_SEL_MASK | ACLK_PERIHP_DIV_CON_MASK,
> + pclk_div << PCLK_PERIHP_DIV_CON_SHIFT |
> + hclk_div << HCLK_PERIHP_DIV_CON_SHIFT |
> + ACLK_PERIHP_PLL_SEL_GPLL << ACLK_PERIHP_PLL_SEL_SHIFT |
> + aclk_div << ACLK_PERIHP_DIV_CON_SHIFT);
> +
> + /* configure perilp0 aclk, hclk, pclk */
> + aclk_div = GPLL_HZ / PERILP0_ACLK_HZ - 1;
> + assert((aclk_div + 1) * PERILP0_ACLK_HZ == GPLL_HZ && aclk_div < 0x1f);
> +
> + hclk_div = PERILP0_ACLK_HZ / PERILP0_HCLK_HZ - 1;
> + assert((hclk_div + 1) * PERILP0_HCLK_HZ ==
> + PERILP0_ACLK_HZ && (hclk_div < 0x4));
> +
> + pclk_div = PERILP0_ACLK_HZ / PERILP0_PCLK_HZ - 1;
> + assert((pclk_div + 1) * PERILP0_PCLK_HZ ==
> + PERILP0_ACLK_HZ && (pclk_div < 0x7));
> +
> + rk_clrsetreg(&cru->clksel_con[23],
> + PCLK_PERILP0_DIV_CON_MASK | HCLK_PERILP0_DIV_CON_MASK |
> + ACLK_PERILP0_PLL_SEL_MASK | ACLK_PERILP0_DIV_CON_MASK,
> + pclk_div << PCLK_PERILP0_DIV_CON_SHIFT |
> + hclk_div << HCLK_PERILP0_DIV_CON_SHIFT |
> + ACLK_PERILP0_PLL_SEL_GPLL << ACLK_PERILP0_PLL_SEL_SHIFT |
> + aclk_div << ACLK_PERILP0_DIV_CON_SHIFT);
> +
> + /* perilp1 hclk select gpll as source */
> + hclk_div = GPLL_HZ / PERILP1_HCLK_HZ - 1;
> + assert((hclk_div + 1) * PERILP1_HCLK_HZ ==
> + GPLL_HZ && (hclk_div < 0x1f));
> +
> + pclk_div = PERILP1_HCLK_HZ / PERILP1_HCLK_HZ - 1;
> + assert((pclk_div + 1) * PERILP1_HCLK_HZ ==
> + PERILP1_HCLK_HZ && (hclk_div < 0x7));
> +
> + rk_clrsetreg(&cru->clksel_con[25],
> + PCLK_PERILP1_DIV_CON_MASK | HCLK_PERILP1_DIV_CON_MASK |
> + HCLK_PERILP1_PLL_SEL_MASK,
> + pclk_div << PCLK_PERILP1_DIV_CON_SHIFT |
> + hclk_div << HCLK_PERILP1_DIV_CON_SHIFT |
> + HCLK_PERILP1_PLL_SEL_GPLL << HCLK_PERILP1_PLL_SEL_SHIFT);
> +}
> +
> +void rk3399_configure_cpu(struct rk3399_cru *cru,
> + enum apll_l_frequencies apll_l_freq)
> +{
> + u32 aclkm_div;
> + u32 pclk_dbg_div;
> + u32 atclk_div;
> +
> + rkclk_set_pll(&cru->apll_l_con[0], apll_l_cfgs[apll_l_freq]);
> +
> + aclkm_div = APLL_HZ / ACLKM_CORE_HZ - 1;
> + assert((aclkm_div + 1) * ACLKM_CORE_HZ == APLL_HZ &&
> + aclkm_div < 0x1f);
> +
> + pclk_dbg_div = APLL_HZ / PCLK_DBG_HZ - 1;
> + assert((pclk_dbg_div + 1) * PCLK_DBG_HZ == APLL_HZ &&
> + pclk_dbg_div < 0x1f);
> +
> + atclk_div = APLL_HZ / ATCLK_CORE_HZ - 1;
> + assert((atclk_div + 1) * ATCLK_CORE_HZ == APLL_HZ &&
> + atclk_div < 0x1f);
> +
> + rk_clrsetreg(&cru->clksel_con[0],
> + ACLKM_CORE_L_DIV_CON_MASK | CLK_CORE_L_PLL_SEL_MASK |
> + CLK_CORE_L_DIV_MASK,
> + aclkm_div << ACLKM_CORE_L_DIV_CON_SHIFT |
> + CLK_CORE_L_PLL_SEL_ALPLL << CLK_CORE_L_PLL_SEL_SHIFT |
> + 0 << CLK_CORE_L_DIV_SHIFT);
> +
> + rk_clrsetreg(&cru->clksel_con[1],
> + PCLK_DBG_L_DIV_MASK | ATCLK_CORE_L_DIV_MASK,
> + pclk_dbg_div << PCLK_DBG_L_DIV_SHIFT |
> + atclk_div << ATCLK_CORE_L_DIV_SHIFT);
> +}
> +#define I2C_CLK_REG_MASK(bus) \
> + (I2C_DIV_CON_MASK << \
> + CLK_I2C ##bus## _DIV_CON_SHIFT | \
> + CLK_I2C_PLL_SEL_MASK << \
> + CLK_I2C ##bus## _PLL_SEL_SHIFT)
> +
> +#define I2C_CLK_REG_VALUE(bus, clk_div) \
> + ((clk_div - 1) << \
> + CLK_I2C ##bus## _DIV_CON_SHIFT | \
> + CLK_I2C_PLL_SEL_GPLL << \
> + CLK_I2C ##bus## _PLL_SEL_SHIFT)
> +
> +#define I2C_CLK_DIV_VALUE(con, bus) \
> + (con >> CLK_I2C ##bus## _DIV_CON_SHIFT) & \
> + I2C_DIV_CON_MASK;
> +
> +static ulong rk3399_i2c_get_clk(struct rk3399_cru *cru, ulong clk_id)
> +{
> + u32 div, con;
> +
> + switch (clk_id) {
> + case SCLK_I2C1:
> + con = readl(&cru->clksel_con[61]);
> + div = I2C_CLK_DIV_VALUE(con, 1);
> + break;
> + case SCLK_I2C2:
> + con = readl(&cru->clksel_con[62]);
> + div = I2C_CLK_DIV_VALUE(con, 2);
> + break;
> + case SCLK_I2C3:
> + con = readl(&cru->clksel_con[63]);
> + div = I2C_CLK_DIV_VALUE(con, 3);
> + break;
> + case SCLK_I2C5:
> + con = readl(&cru->clksel_con[61]);
> + div = I2C_CLK_DIV_VALUE(con, 5);
> + break;
> + case SCLK_I2C6:
> + con = readl(&cru->clksel_con[62]);
> + div = I2C_CLK_DIV_VALUE(con, 6);
> + break;
> + case SCLK_I2C7:
> + con = readl(&cru->clksel_con[63]);
> + div = I2C_CLK_DIV_VALUE(con, 7);
> + break;
> + default:
> + printf("do not support this i2c bus\n");
> + return -EINVAL;
> + }
> +
> + return DIV_TO_RATE(GPLL_HZ, div);
> +}
> +
> +static ulong rk3399_i2c_set_clk(struct rk3399_cru *cru, ulong clk_id, uint hz)
> +{
> + int src_clk_div;
> +
> + /* i2c0,4,8 src clock from ppll, i2c1,2,3,5,6,7 src clock from gpll*/
> + src_clk_div = GPLL_HZ / hz;
> + assert(src_clk_div - 1 < 127);
> +
> + switch (clk_id) {
> + case SCLK_I2C1:
> + rk_clrsetreg(&cru->clksel_con[61], I2C_CLK_REG_MASK(1),
> + I2C_CLK_REG_VALUE(1, src_clk_div));
> + break;
> + case SCLK_I2C2:
> + rk_clrsetreg(&cru->clksel_con[62], I2C_CLK_REG_MASK(2),
> + I2C_CLK_REG_VALUE(2, src_clk_div));
> + break;
> + case SCLK_I2C3:
> + rk_clrsetreg(&cru->clksel_con[63], I2C_CLK_REG_MASK(3),
> + I2C_CLK_REG_VALUE(3, src_clk_div));
> + break;
> + case SCLK_I2C5:
> + rk_clrsetreg(&cru->clksel_con[61], I2C_CLK_REG_MASK(5),
> + I2C_CLK_REG_VALUE(5, src_clk_div));
> + break;
> + case SCLK_I2C6:
> + rk_clrsetreg(&cru->clksel_con[62], I2C_CLK_REG_MASK(6),
> + I2C_CLK_REG_VALUE(6, src_clk_div));
> + break;
> + case SCLK_I2C7:
> + rk_clrsetreg(&cru->clksel_con[63], I2C_CLK_REG_MASK(7),
> + I2C_CLK_REG_VALUE(7, src_clk_div));
> + break;
> + default:
> + printf("do not support this i2c bus\n");
> + return -EINVAL;
> + }
> +
> + return DIV_TO_RATE(GPLL_HZ, src_clk_div);
> +}
> +
> +static ulong rk3399_vop_set_clk(struct rk3399_cru *cru, ulong clk_id, u32 hz)
> +{
> + struct pll_div vpll_config = {0};
> + int aclk_vop = 198*MHz;
> + void *aclkreg_addr, *dclkreg_addr;
> + u32 div;
> +
> + switch (clk_id) {
> + case DCLK_VOP0:
> + aclkreg_addr = &cru->clksel_con[47];
> + dclkreg_addr = &cru->clksel_con[49];
> + break;
> + case DCLK_VOP1:
> + aclkreg_addr = &cru->clksel_con[48];
> + dclkreg_addr = &cru->clksel_con[50];
> + break;
> + default:
> + return -EINVAL;
> + }
> + /* vop aclk source clk: cpll */
> + div = CPLL_HZ / aclk_vop;
> + assert(div - 1 < 32);
> +
> + rk_clrsetreg(aclkreg_addr,
> + ACLK_VOP_PLL_SEL_MASK | ACLK_VOP_DIV_CON_MASK,
> + ACLK_VOP_PLL_SEL_CPLL << ACLK_VOP_PLL_SEL_SHIFT |
> + (div - 1) << ACLK_VOP_DIV_CON_SHIFT);
> +
> + /* vop dclk source from vpll, and equals to vpll(means div == 1) */
> + if (pll_para_config(hz, &vpll_config))
> + return -1;
> +
> + rkclk_set_pll(&cru->vpll_con[0], &vpll_config);
> +
> + rk_clrsetreg(dclkreg_addr,
> + DCLK_VOP_DCLK_SEL_MASK | DCLK_VOP_PLL_SEL_MASK|
> + DCLK_VOP_DIV_CON_MASK,
> + DCLK_VOP_DCLK_SEL_DIVOUT << DCLK_VOP_DCLK_SEL_SHIFT |
> + DCLK_VOP_PLL_SEL_VPLL << DCLK_VOP_PLL_SEL_SHIFT |
> + (1 - 1) << DCLK_VOP_DIV_CON_SHIFT);
> +
> + return hz;
> +}
> +
> +static ulong rk3399_mmc_get_clk(struct rk3399_cru *cru, uint clk_id)
> +{
> + u32 div, con;
> +
> + switch (clk_id) {
> + case SCLK_SDMMC:
> + con = readl(&cru->clksel_con[16]);
> + break;
> + case SCLK_EMMC:
> + con = readl(&cru->clksel_con[21]);
> + break;
> + default:
> + return -EINVAL;
> + }
> + div = (con>>CLK_EMMC_DIV_CON_SHIFT) & CLK_EMMC_DIV_CON_MASK;
> +
> + return DIV_TO_RATE(GPLL_HZ, div);
> +}
> +
> +static ulong rk3399_mmc_set_clk(struct rk3399_cru *cru,
> + ulong clk_id, ulong set_rate)
> +{
> + int src_clk_div;
> + int aclk_emmc = 198*MHz;
> +
> + switch (clk_id) {
> + case SCLK_SDMMC:
> + /* Select clk_sdmmc source from GPLL too */
> + src_clk_div = GPLL_HZ / set_rate;
> + assert(src_clk_div - 1 < 127);
> +
> + rk_clrsetreg(&cru->clksel_con[16],
> + CLK_EMMC_PLL_MASK | CLK_EMMC_DIV_CON_MASK,
> + CLK_EMMC_PLL_SEL_GPLL << CLK_EMMC_PLL_SHIFT |
> + (src_clk_div - 1) << CLK_EMMC_DIV_CON_SHIFT);
> + break;
> + case SCLK_EMMC:
> + /* Select aclk_emmc source from GPLL */
> + src_clk_div = GPLL_HZ / aclk_emmc;
> + assert(src_clk_div - 1 < 31);
> +
> + rk_clrsetreg(&cru->clksel_con[21],
> + ACLK_EMMC_PLL_SEL_MASK | ACLK_EMMC_DIV_CON_MASK,
> + ACLK_EMMC_PLL_SEL_GPLL << ACLK_EMMC_PLL_SEL_SHIFT |
> + (src_clk_div - 1) << ACLK_EMMC_DIV_CON_SHIFT);
> +
> + /* Select clk_emmc source from GPLL too */
> + src_clk_div = GPLL_HZ / set_rate;
> + assert(src_clk_div - 1 < 127);
> +
> + rk_clrsetreg(&cru->clksel_con[22],
> + CLK_EMMC_PLL_MASK | CLK_EMMC_DIV_CON_MASK,
> + CLK_EMMC_PLL_SEL_GPLL << CLK_EMMC_PLL_SHIFT |
> + (src_clk_div - 1) << CLK_EMMC_DIV_CON_SHIFT);
> + break;
> + default:
> + return -EINVAL;
> + }
> + return rk3399_mmc_get_clk(cru, clk_id);
> +}
> +
> +static ulong rk3399_clk_get_rate(struct clk *clk)
> +{
> + struct rk3399_clk_priv *priv = dev_get_priv(clk->dev);
> + ulong rate = 0;
> +
> + switch (clk->id) {
> + case 0 ... 63:
> + return 0;
> + case SCLK_SDMMC:
> + case SCLK_EMMC:
> + rate = rk3399_mmc_get_clk(priv->cru, clk->id);
> + break;
> + case SCLK_I2C1:
> + case SCLK_I2C2:
> + case SCLK_I2C3:
> + case SCLK_I2C5:
> + case SCLK_I2C6:
> + case SCLK_I2C7:
> + rate = rk3399_i2c_get_clk(priv->cru, clk->id);
> + break;
> + case DCLK_VOP0:
> + case DCLK_VOP1:
> + break;
> + default:
> + return -ENOENT;
> + }
> +
> + return rate;
> +}
> +
> +static ulong rk3399_clk_set_rate(struct clk *clk, ulong rate)
> +{
> + struct rk3399_clk_priv *priv = dev_get_priv(clk->dev);
> + ulong ret = 0;
> +
> + switch (clk->id) {
> + case 0 ... 63:
> + return 0;
> + case SCLK_SDMMC:
> + case SCLK_EMMC:
> + ret = rk3399_mmc_set_clk(priv->cru, clk->id, rate);
> + break;
> + case SCLK_I2C1:
> + case SCLK_I2C2:
> + case SCLK_I2C3:
> + case SCLK_I2C5:
> + case SCLK_I2C6:
> + case SCLK_I2C7:
> + ret = rk3399_i2c_set_clk(priv->cru, clk->id, rate);
> + break;
> + case DCLK_VOP0:
> + case DCLK_VOP1:
> + rate = rk3399_vop_set_clk(priv->cru, clk->id, rate);
> + break;
> + default:
> + return -ENOENT;
> + }
> +
> + return ret;
> +}
> +
> +static struct clk_ops rk3399_clk_ops = {
> + .get_rate = rk3399_clk_get_rate,
> + .set_rate = rk3399_clk_set_rate,
> +};
> +
> +void *rockchip_get_cru(void)
> +{
> + struct udevice *dev;
> + fdt_addr_t *addr;
> + int ret;
> +
> + ret = uclass_get_device_by_name(UCLASS_CLK, "clk_rk3399", &dev);
> + if (ret)
> + return ERR_PTR(ret);
> +
> + addr = dev_get_addr_ptr(dev);
> + if ((fdt_addr_t)addr == FDT_ADDR_T_NONE)
> + return ERR_PTR(-EINVAL);
> +
> + return addr;
> +}
> +
> +static int rk3399_clk_probe(struct udevice *dev)
> +{
> + struct rk3399_clk_priv *priv = dev_get_priv(dev);
> +
> + rkclk_init(priv->cru);
> +
> + return 0;
> +}
> +
> +static int rk3399_clk_ofdata_to_platdata(struct udevice *dev)
> +{
> + struct rk3399_clk_priv *priv = dev_get_priv(dev);
> +
> + priv->cru = (struct rk3399_cru *)dev_get_addr(dev);
> +
> + return 0;
> +}
> +
> +static int rk3399_clk_bind(struct udevice *dev)
> +{
> + int ret;
> +
> + /* The reset driver does not have a device node, so bind it here */
> + ret = device_bind_driver(gd->dm_root, "rk3399_sysreset", "reset", &dev);
> + if (ret)
> + printf("Warning: No RK3399 reset driver: ret=%d\n", ret);
> +
> + return 0;
> +}
> +
> +static const struct udevice_id rk3399_clk_ids[] = {
> + { .compatible = "rockchip,rk3399-cru" },
> + { }
> +};
> +
> +U_BOOT_DRIVER(clk_rk3399) = {
> + .name = "clk_rk3399",
> + .id = UCLASS_CLK,
> + .of_match = rk3399_clk_ids,
> + .priv_auto_alloc_size = sizeof(struct rk3399_clk_priv),
> + .ofdata_to_platdata = rk3399_clk_ofdata_to_platdata,
> + .ops = &rk3399_clk_ops,
> + .bind = rk3399_clk_bind,
> + .probe = rk3399_clk_probe,
> +};
>