This commit adds Actions Semi OWL family base clock and S900 SoC specific clock support. For S900 peripheral clock support, only UART clock has been added for now.
Signed-off-by: Manivannan Sadhasivam manivannan.sadhasivam@linaro.org ---
Changes in v3:
* Moved the change log from cover letter
Changes in v2:
* Removed clk_owl.c and moved all clk code to clk_s900.c as per Simon's review comments. * Moved arch/arm/mach-owl/Kconfig changes to board support patch.
arch/arm/include/asm/arch-owl/clk_s900.h | 57 +++++++++ arch/arm/include/asm/arch-owl/regs_s900.h | 64 ++++++++++ drivers/clk/Kconfig | 1 + drivers/clk/Makefile | 1 + drivers/clk/owl/Kconfig | 12 ++ drivers/clk/owl/Makefile | 3 + drivers/clk/owl/clk_s900.c | 138 ++++++++++++++++++++++ 7 files changed, 276 insertions(+) create mode 100644 arch/arm/include/asm/arch-owl/clk_s900.h create mode 100644 arch/arm/include/asm/arch-owl/regs_s900.h create mode 100644 drivers/clk/owl/Kconfig create mode 100644 drivers/clk/owl/Makefile create mode 100644 drivers/clk/owl/clk_s900.c
diff --git a/arch/arm/include/asm/arch-owl/clk_s900.h b/arch/arm/include/asm/arch-owl/clk_s900.h new file mode 100644 index 0000000000..88e88f77f8 --- /dev/null +++ b/arch/arm/include/asm/arch-owl/clk_s900.h @@ -0,0 +1,57 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Actions Semi S900 Clock Definitions + * + * Copyright (C) 2015 Actions Semi Co., Ltd. + * Copyright (C) 2018 Manivannan Sadhasivam manivannan.sadhasivam@linaro.org + * + */ + +#ifndef _OWL_CLK_S900_H_ +#define _OWL_CLK_S900_H_ + +#include <clk-uclass.h> + +struct owl_clk_priv { + phys_addr_t base; +}; + +/* BUSCLK register definitions */ +#define CMU_PDBGDIV_8 7 +#define CMU_PDBGDIV_SHIFT 26 +#define CMU_PDBGDIV_DIV (CMU_PDBGDIV_8 << CMU_PDBGDIV_SHIFT) +#define CMU_PERDIV_8 7 +#define CMU_PERDIV_SHIFT 20 +#define CMU_PERDIV_DIV (CMU_PERDIV_8 << CMU_PERDIV_SHIFT) +#define CMU_NOCDIV_2 1 +#define CMU_NOCDIV_SHIFT 19 +#define CMU_NOCDIV_DIV (CMU_NOCDIV_2 << CMU_NOCDIV_SHIFT) +#define CMU_DMMCLK_SRC_APLL 2 +#define CMU_DMMCLK_SRC_SHIFT 10 +#define CMU_DMMCLK_SRC (CMU_DMMCLK_SRC_APLL << CMU_DMMCLK_SRC_SHIFT) +#define CMU_APBCLK_DIV BIT(8) +#define CMU_NOCCLK_SRC BIT(7) +#define CMU_AHBCLK_DIV BIT(4) +#define CMU_CORECLK_MASK 3 +#define CMU_CORECLK_CPLL BIT(1) +#define CMU_CORECLK_HOSC BIT(0) + +/* COREPLL register definitions */ +#define CMU_COREPLL_EN BIT(9) +#define CMU_COREPLL_HOSC_EN BIT(8) +#define CMU_COREPLL_OUT (1104 / 24) + +/* DEVPLL register definitions */ +#define CMU_DEVPLL_CLK BIT(12) +#define CMU_DEVPLL_EN BIT(8) +#define CMU_DEVPLL_OUT (660 / 6) + +/* UARTCLK register definitions */ +#define CMU_UARTCLK_SRC_DEVPLL BIT(16) + +/* DEVCLKEN1 register definitions */ +#define CMU_DEVCLKEN1_UART5 BIT(21) + +#define PLL_STABILITY_WAIT_US 50 + +#endif diff --git a/arch/arm/include/asm/arch-owl/regs_s900.h b/arch/arm/include/asm/arch-owl/regs_s900.h new file mode 100644 index 0000000000..9e9106ddaa --- /dev/null +++ b/arch/arm/include/asm/arch-owl/regs_s900.h @@ -0,0 +1,64 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Actions Semi S900 Register Definitions + * + * Copyright (C) 2015 Actions Semi Co., Ltd. + * Copyright (C) 2018 Manivannan Sadhasivam manivannan.sadhasivam@linaro.org + * + */ + +#ifndef _OWL_REGS_S900_H_ +#define _OWL_REGS_S900_H_ + +/* CMU registers */ +#define CMU_COREPLL (0x0000) +#define CMU_DEVPLL (0x0004) +#define CMU_DDRPLL (0x0008) +#define CMU_NANDPLL (0x000C) +#define CMU_DISPLAYPLL (0x0010) +#define CMU_AUDIOPLL (0x0014) +#define CMU_TVOUTPLL (0x0018) +#define CMU_BUSCLK (0x001C) +#define CMU_SENSORCLK (0x0020) +#define CMU_LCDCLK (0x0024) +#define CMU_DSICLK (0x0028) +#define CMU_CSICLK (0x002C) +#define CMU_DECLK (0x0030) +#define CMU_BISPCLK (0x0034) +#define CMU_IMXCLK (0x0038) +#define CMU_HDECLK (0x003C) +#define CMU_VDECLK (0x0040) +#define CMU_VCECLK (0x0044) +#define CMU_NANDCCLK (0x004C) +#define CMU_SD0CLK (0x0050) +#define CMU_SD1CLK (0x0054) +#define CMU_SD2CLK (0x0058) +#define CMU_UART0CLK (0x005C) +#define CMU_UART1CLK (0x0060) +#define CMU_UART2CLK (0x0064) +#define CMU_PWM0CLK (0x0070) +#define CMU_PWM1CLK (0x0074) +#define CMU_PWM2CLK (0x0078) +#define CMU_PWM3CLK (0x007C) +#define CMU_USBPLL (0x0080) +#define CMU_ASSISTPLL (0x0084) +#define CMU_EDPCLK (0x0088) +#define CMU_GPU3DCLK (0x0090) +#define CMU_CORECTL (0x009C) +#define CMU_DEVCLKEN0 (0x00A0) +#define CMU_DEVCLKEN1 (0x00A4) +#define CMU_DEVRST0 (0x00A8) +#define CMU_DEVRST1 (0x00AC) +#define CMU_UART3CLK (0x00B0) +#define CMU_UART4CLK (0x00B4) +#define CMU_UART5CLK (0x00B8) +#define CMU_UART6CLK (0x00BC) +#define CMU_TLSCLK (0x00C0) +#define CMU_SD3CLK (0x00C4) +#define CMU_PWM4CLK (0x00C8) +#define CMU_PWM5CLK (0x00CC) +#define CMU_ANALOGDEBUG (0x00D4) +#define CMU_TVOUTPLLDEBUG0 (0x00EC) +#define CMU_TVOUTPLLDEBUG1 (0x00FC) + +#endif diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index edb4ca58ea..18bf8a6d28 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -89,6 +89,7 @@ source "drivers/clk/exynos/Kconfig" source "drivers/clk/at91/Kconfig" source "drivers/clk/renesas/Kconfig" source "drivers/clk/mvebu/Kconfig" +source "drivers/clk/owl/Kconfig"
config ICS8N3QV01 bool "Enable ICS8N3QV01 VCXO driver" diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index 58139b13a8..078f8d7ae1 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -16,6 +16,7 @@ obj-$(CONFIG_CLK_BCM6345) += clk_bcm6345.o obj-$(CONFIG_CLK_BOSTON) += clk_boston.o obj-$(CONFIG_CLK_EXYNOS) += exynos/ obj-$(CONFIG_CLK_HSDK) += clk-hsdk-cgu.o +obj-$(CONFIG_CLK_OWL) += owl/ obj-$(CONFIG_CLK_RENESAS) += renesas/ obj-$(CONFIG_CLK_STM32F) += clk_stm32f.o obj-$(CONFIG_CLK_STM32MP1) += clk_stm32mp1.o diff --git a/drivers/clk/owl/Kconfig b/drivers/clk/owl/Kconfig new file mode 100644 index 0000000000..661f1981b9 --- /dev/null +++ b/drivers/clk/owl/Kconfig @@ -0,0 +1,12 @@ +config CLK_OWL + bool "Actions Semi OWL clock drivers" + depends on CLK && ARCH_OWL + help + Enable support for clock managemet unit present in Actions Semi + OWL SoCs. + +config CLK_S900 + bool "Actions Semi S900 clock driver" + depends on CLK_OWL && ARM64 + help + Enable support for the clocks in Actions Semi S900 SoC. diff --git a/drivers/clk/owl/Makefile b/drivers/clk/owl/Makefile new file mode 100644 index 0000000000..9132dcc175 --- /dev/null +++ b/drivers/clk/owl/Makefile @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0+ + +obj-$(CONFIG_CLK_S900) += clk_s900.o diff --git a/drivers/clk/owl/clk_s900.c b/drivers/clk/owl/clk_s900.c new file mode 100644 index 0000000000..2b39bb99af --- /dev/null +++ b/drivers/clk/owl/clk_s900.c @@ -0,0 +1,138 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Actions Semi S900 clock driver + * + * Copyright (C) 2015 Actions Semi Co., Ltd. + * Copyright (C) 2018 Manivannan Sadhasivam manivannan.sadhasivam@linaro.org + */ + +#include <common.h> +#include <dm.h> +#include <asm/arch-owl/clk_s900.h> +#include <asm/arch-owl/regs_s900.h> +#include <asm/io.h> + +#include <dt-bindings/clock/s900_cmu.h> + +void owl_clk_init(struct owl_clk_priv *priv) +{ + u32 bus_clk = 0, core_pll, dev_pll; + + /* Enable ASSIST_PLL */ + setbits_le32(priv->base + CMU_ASSISTPLL, BIT(0)); + + udelay(PLL_STABILITY_WAIT_US); + + /* Source HOSC to DEV_CLK */ + clrbits_le32(priv->base + CMU_DEVPLL, CMU_DEVPLL_CLK); + + /* Configure BUS_CLK */ + bus_clk |= (CMU_PDBGDIV_DIV | CMU_PERDIV_DIV | CMU_NOCDIV_DIV | + CMU_DMMCLK_SRC | CMU_APBCLK_DIV | CMU_AHBCLK_DIV | + CMU_NOCCLK_SRC | CMU_CORECLK_HOSC); + writel(bus_clk, priv->base + CMU_BUSCLK); + + udelay(PLL_STABILITY_WAIT_US); + + /* Configure CORE_PLL */ + core_pll = readl(priv->base + CMU_COREPLL); + core_pll |= (CMU_COREPLL_EN | CMU_COREPLL_HOSC_EN | CMU_COREPLL_OUT); + writel(core_pll, priv->base + CMU_COREPLL); + + udelay(PLL_STABILITY_WAIT_US); + + /* Configure DEV_PLL */ + dev_pll = readl(priv->base + CMU_DEVPLL); + dev_pll |= (CMU_DEVPLL_EN | CMU_DEVPLL_OUT); + writel(dev_pll, priv->base + CMU_DEVPLL); + + udelay(PLL_STABILITY_WAIT_US); + + /* Source CORE_PLL for CORE_CLK */ + clrsetbits_le32(priv->base + CMU_BUSCLK, CMU_CORECLK_MASK, + CMU_CORECLK_CPLL); + + /* Source DEV_PLL for DEV_CLK */ + setbits_le32(priv->base + CMU_DEVPLL, CMU_DEVPLL_CLK); + + udelay(PLL_STABILITY_WAIT_US); +} + +void owl_uart_clk_enable(struct owl_clk_priv *priv) +{ + /* Source HOSC for UART5 interface */ + clrbits_le32(priv->base + CMU_UART5CLK, CMU_UARTCLK_SRC_DEVPLL); + + /* Enable UART5 interface clock */ + setbits_le32(priv->base + CMU_DEVCLKEN1, CMU_DEVCLKEN1_UART5); +} + +void owl_uart_clk_disable(struct owl_clk_priv *priv) +{ + /* Disable UART5 interface clock */ + clrbits_le32(priv->base + CMU_DEVCLKEN1, CMU_DEVCLKEN1_UART5); +} + +int owl_clk_enable(struct clk *clk) +{ + struct owl_clk_priv *priv = dev_get_priv(clk->dev); + + switch (clk->id) { + case CLOCK_UART5: + owl_uart_clk_enable(priv); + break; + default: + return 0; + } + + return 0; +} + +int owl_clk_disable(struct clk *clk) +{ + struct owl_clk_priv *priv = dev_get_priv(clk->dev); + + switch (clk->id) { + case CLOCK_UART5: + owl_uart_clk_disable(priv); + break; + default: + return 0; + } + + return 0; +} + +static int owl_clk_probe(struct udevice *dev) +{ + struct owl_clk_priv *priv = dev_get_priv(dev); + + priv->base = dev_read_addr(dev); + if (priv->base == FDT_ADDR_T_NONE) + return -EINVAL; + + /* setup necessary clocks */ + owl_clk_init(priv); + + return 0; +} + +static struct clk_ops owl_clk_ops = { + .enable = owl_clk_enable, + .disable = owl_clk_disable, +}; + +static const struct udevice_id owl_clk_ids[] = { + { .compatible = "actions,s900-cmu" }, + { } +}; + +U_BOOT_DRIVER(clk_owl) = { + .name = "clk_s900", + .id = UCLASS_CLK, + .of_match = owl_clk_ids, + .ops = &owl_clk_ops, + .priv_auto_alloc_size = sizeof(struct owl_clk_priv), + .probe = owl_clk_probe, + .flags = DM_FLAG_PRE_RELOC, +};