From: Patrice Chotard Date: Wed, 15 Nov 2017 12:14:44 +0000 (+0100) Subject: clk: stm32f7: retrieve PWR base address from DT X-Git-Tag: v2018.01-rc1~55 X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=d0a768b1c848cbdebfa57f44fd6c7205c235e3ee;p=u-boot clk: stm32f7: retrieve PWR base address from DT PWR IP is used to enable over-drive feature in order to reach a higher frequency. Get its base address from DT instead of hard-coded value Signed-off-by: Patrice Chotard Reviewed-by: Vikas Manocha --- diff --git a/arch/arm/include/asm/arch-stm32f4/stm32_pwr.h b/arch/arm/include/asm/arch-stm32f4/stm32_pwr.h new file mode 100644 index 0000000000..bfe54698b3 --- /dev/null +++ b/arch/arm/include/asm/arch-stm32f4/stm32_pwr.h @@ -0,0 +1,23 @@ +/* + * Copyright (C) 2017, STMicroelectronics - All Rights Reserved + * Author(s): Patrice Chotard, for STMicroelectronics. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __STM32_PWR_H_ + +/* + * Offsets of some PWR registers + */ +#define PWR_CR1_ODEN BIT(16) +#define PWR_CR1_ODSWEN BIT(17) +#define PWR_CSR1_ODRDY BIT(16) +#define PWR_CSR1_ODSWRDY BIT(17) + +struct stm32_pwr_regs { + u32 cr1; /* power control register 1 */ + u32 csr1; /* power control/status register 2 */ +}; + +#endif /* __STM32_PWR_H_ */ diff --git a/arch/arm/include/asm/arch-stm32f7/stm32.h b/arch/arm/include/asm/arch-stm32f7/stm32.h index d6412a00cc..0117039cf2 100644 --- a/arch/arm/include/asm/arch-stm32f7/stm32.h +++ b/arch/arm/include/asm/arch-stm32f7/stm32.h @@ -95,13 +95,6 @@ struct stm32_rcc_regs { }; #define STM32_RCC ((struct stm32_rcc_regs *)RCC_BASE) -struct stm32_pwr_regs { - u32 cr1; /* power control register 1 */ - u32 csr1; /* power control/status register 2 */ - u32 cr2; /* power control register 2 */ - u32 csr2; /* power control/status register 2 */ -}; -#define STM32_PWR ((struct stm32_pwr_regs *)PWR_BASE) void stm32_flash_latency_cfg(int latency); diff --git a/arch/arm/include/asm/arch-stm32f7/stm32_pwr.h b/arch/arm/include/asm/arch-stm32f7/stm32_pwr.h new file mode 100644 index 0000000000..917dd46d98 --- /dev/null +++ b/arch/arm/include/asm/arch-stm32f7/stm32_pwr.h @@ -0,0 +1,25 @@ +/* + * Copyright (C) 2017, STMicroelectronics - All Rights Reserved + * Author(s): Patrice Chotard, for STMicroelectronics. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __STM32_PWR_H_ + +/* + * Offsets of some PWR registers + */ +#define PWR_CR1_ODEN BIT(16) +#define PWR_CR1_ODSWEN BIT(17) +#define PWR_CSR1_ODRDY BIT(16) +#define PWR_CSR1_ODSWRDY BIT(17) + +struct stm32_pwr_regs { + u32 cr1; /* power control register 1 */ + u32 csr1; /* power control/status register 2 */ + u32 cr2; /* power control register 2 */ + u32 csr2; /* power control/status register 2 */ +}; + +#endif /* __STM32_PWR_H_ */ diff --git a/drivers/clk/clk_stm32f7.c b/drivers/clk/clk_stm32f7.c index f1a9e9ca44..0fa838c4ee 100644 --- a/drivers/clk/clk_stm32f7.c +++ b/drivers/clk/clk_stm32f7.c @@ -8,10 +8,12 @@ #include #include #include + #include #include #include #include +#include #include @@ -52,13 +54,6 @@ #define RCC_CFGR_PPRE1_SHIFT 10 #define RCC_CFGR_PPRE2_SHIFT 13 -/* - * Offsets of some PWR registers - */ -#define PWR_CR1_ODEN BIT(16) -#define PWR_CR1_ODSWEN BIT(17) -#define PWR_CSR1_ODRDY BIT(16) -#define PWR_CSR1_ODSWRDY BIT(17) struct pll_psc { u8 pll_m; @@ -88,6 +83,7 @@ struct pll_psc { struct stm32_clk { struct stm32_rcc_regs *base; + struct stm32_pwr_regs *pwr_regs; }; #if !defined(CONFIG_STM32_HSE_HZ) @@ -115,6 +111,7 @@ static int configure_clocks(struct udevice *dev) { struct stm32_clk *priv = dev_get_priv(dev); struct stm32_rcc_regs *regs = priv->base; + struct stm32_pwr_regs *pwr = priv->pwr_regs; /* Reset RCC configuration */ setbits_le32(®s->cr, RCC_CR_HSION); @@ -153,14 +150,14 @@ static int configure_clocks(struct udevice *dev) /* Enable high performance mode, System frequency up to 200 MHz */ setbits_le32(®s->apb1enr, RCC_APB1ENR_PWREN); - setbits_le32(&STM32_PWR->cr1, PWR_CR1_ODEN); + setbits_le32(&pwr->cr1, PWR_CR1_ODEN); /* Infinite wait! */ - while (!(readl(&STM32_PWR->csr1) & PWR_CSR1_ODRDY)) + while (!(readl(&pwr->csr1) & PWR_CSR1_ODRDY)) ; /* Enable the Over-drive switch */ - setbits_le32(&STM32_PWR->cr1, PWR_CR1_ODSWEN); + setbits_le32(&pwr->cr1, PWR_CR1_ODSWEN); /* Infinite wait! */ - while (!(readl(&STM32_PWR->csr1) & PWR_CSR1_ODSWRDY)) + while (!(readl(&pwr->csr1) & PWR_CSR1_ODSWRDY)) ; stm32_flash_latency_cfg(5); @@ -268,6 +265,9 @@ void clock_setup(int peripheral) static int stm32_clk_probe(struct udevice *dev) { + struct ofnode_phandle_args args; + int err; + debug("%s: stm32_clk_probe\n", __func__); struct stm32_clk *priv = dev_get_priv(dev); @@ -279,6 +279,16 @@ static int stm32_clk_probe(struct udevice *dev) priv->base = (struct stm32_rcc_regs *)addr; + err = dev_read_phandle_with_args(dev, "st,syscfg", NULL, 0, 0, + &args); + if (err) { + debug("%s: can't find syscon device (%d)\n", __func__, + err); + return err; + } + + priv->pwr_regs = (struct stm32_pwr_regs *)ofnode_get_addr(args.node); + configure_clocks(dev); return 0;