From ac4e7610dab3846fefc9e43a0d13c613e440f144 Mon Sep 17 00:00:00 2001 From: Giulio Benetti Date: Tue, 18 Feb 2020 20:02:51 +0100 Subject: [PATCH] clk: imx: add i.IMXRT1020 clk driver Add i.MXRT1020 clk driver support. Signed-off-by: Giulio Benetti Reviewed-by: Lukasz Majewski --- drivers/clk/imx/Kconfig | 16 ++ drivers/clk/imx/Makefile | 1 + drivers/clk/imx/clk-imxrt1020.c | 227 ++++++++++++++++++++ include/dt-bindings/clock/imxrt1020-clock.h | 52 +++++ 4 files changed, 296 insertions(+) create mode 100644 drivers/clk/imx/clk-imxrt1020.c create mode 100644 include/dt-bindings/clock/imxrt1020-clock.h diff --git a/drivers/clk/imx/Kconfig b/drivers/clk/imx/Kconfig index 059bc2fbb9..96721bcbf3 100644 --- a/drivers/clk/imx/Kconfig +++ b/drivers/clk/imx/Kconfig @@ -69,6 +69,22 @@ config CLK_IMX8MP help This enables support clock driver for i.MX8MP platforms. +config SPL_CLK_IMXRT1020 + bool "SPL clock support for i.MXRT1020" + depends on ARCH_IMXRT && SPL + select SPL_CLK + select SPL_CLK_CCF + help + This enables SPL DM/DTS support for clock driver in i.MXRT1020 + +config CLK_IMXRT1020 + bool "Clock support for i.MXRT1020" + depends on ARCH_IMXRT + select CLK + select CLK_CCF + help + This enables support clock driver for i.MXRT1020 platforms. + config SPL_CLK_IMXRT1050 bool "SPL clock support for i.MXRT1050" depends on ARCH_IMXRT && SPL diff --git a/drivers/clk/imx/Makefile b/drivers/clk/imx/Makefile index 1e8a49d0f3..01bbbdf3ae 100644 --- a/drivers/clk/imx/Makefile +++ b/drivers/clk/imx/Makefile @@ -17,4 +17,5 @@ obj-$(CONFIG_$(SPL_TPL_)CLK_IMX8MN) += clk-imx8mn.o clk-pll14xx.o \ obj-$(CONFIG_$(SPL_TPL_)CLK_IMX8MP) += clk-imx8mp.o clk-pll14xx.o \ clk-composite-8m.o +obj-$(CONFIG_$(SPL_TPL_)CLK_IMXRT1020) += clk-imxrt1020.o obj-$(CONFIG_$(SPL_TPL_)CLK_IMXRT1050) += clk-imxrt1050.o diff --git a/drivers/clk/imx/clk-imxrt1020.c b/drivers/clk/imx/clk-imxrt1020.c new file mode 100644 index 0000000000..840f783940 --- /dev/null +++ b/drivers/clk/imx/clk-imxrt1020.c @@ -0,0 +1,227 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright(C) 2020 + * Author(s): Giulio Benetti + */ + +#include +#include +#include +#include +#include +#include +#include + +#include "clk.h" + +static ulong imxrt1020_clk_get_rate(struct clk *clk) +{ + struct clk *c; + int ret; + + debug("%s(#%lu)\n", __func__, clk->id); + + ret = clk_get_by_id(clk->id, &c); + if (ret) + return ret; + + return clk_get_rate(c); +} + +static ulong imxrt1020_clk_set_rate(struct clk *clk, unsigned long rate) +{ + struct clk *c; + int ret; + + debug("%s(#%lu), rate: %lu\n", __func__, clk->id, rate); + + ret = clk_get_by_id(clk->id, &c); + if (ret) + return ret; + + return clk_set_rate(c, rate); +} + +static int __imxrt1020_clk_enable(struct clk *clk, bool enable) +{ + struct clk *c; + int ret; + + debug("%s(#%lu) en: %d\n", __func__, clk->id, enable); + + ret = clk_get_by_id(clk->id, &c); + if (ret) + return ret; + + if (enable) + ret = clk_enable(c); + else + ret = clk_disable(c); + + return ret; +} + +static int imxrt1020_clk_disable(struct clk *clk) +{ + return __imxrt1020_clk_enable(clk, 0); +} + +static int imxrt1020_clk_enable(struct clk *clk) +{ + return __imxrt1020_clk_enable(clk, 1); +} + +static struct clk_ops imxrt1020_clk_ops = { + .set_rate = imxrt1020_clk_set_rate, + .get_rate = imxrt1020_clk_get_rate, + .enable = imxrt1020_clk_enable, + .disable = imxrt1020_clk_disable, +}; + +static const char * const pll2_bypass_sels[] = {"pll2_sys", "osc", }; +static const char * const pll3_bypass_sels[] = {"pll3_usb_otg", "osc", }; + +static const char *const pre_periph_sels[] = { "pll2_sys", "pll2_pfd3_297m", "pll3_pfd3_454_74m", "arm_podf", }; +static const char *const periph_sels[] = { "pre_periph_sel", "todo", }; +static const char *const usdhc_sels[] = { "pll2_pfd2_396m", "pll2_pfd0_352m", }; +static const char *const lpuart_sels[] = { "pll3_80m", "osc", }; +static const char *const semc_alt_sels[] = { "pll2_pfd2_396m", "pll3_pfd1_664_62m", }; +static const char *const semc_sels[] = { "periph_sel", "semc_alt_sel", }; + +static int imxrt1020_clk_probe(struct udevice *dev) +{ + void *base; + + /* Anatop clocks */ + base = (void *)ANATOP_BASE_ADDR; + + clk_dm(IMXRT1020_CLK_PLL2_SYS, + imx_clk_pllv3(IMX_PLLV3_GENERIC, "pll2_sys", "osc", + base + 0x30, 0x1)); + clk_dm(IMXRT1020_CLK_PLL3_USB_OTG, + imx_clk_pllv3(IMX_PLLV3_USB, "pll3_usb_otg", "osc", + base + 0x10, 0x1)); + + /* PLL bypass out */ + clk_dm(IMXRT1020_CLK_PLL2_BYPASS, + imx_clk_mux_flags("pll2_bypass", base + 0x30, 16, 1, + pll2_bypass_sels, + ARRAY_SIZE(pll2_bypass_sels), + CLK_SET_RATE_PARENT)); + clk_dm(IMXRT1020_CLK_PLL3_BYPASS, + imx_clk_mux_flags("pll3_bypass", base + 0x10, 16, 1, + pll3_bypass_sels, + ARRAY_SIZE(pll3_bypass_sels), + CLK_SET_RATE_PARENT)); + + clk_dm(IMXRT1020_CLK_PLL3_80M, + imx_clk_fixed_factor("pll3_80m", "pll3_usb_otg", 1, 6)); + + clk_dm(IMXRT1020_CLK_PLL2_PFD0_352M, + imx_clk_pfd("pll2_pfd0_352m", "pll2_sys", base + 0x100, 0)); + clk_dm(IMXRT1020_CLK_PLL2_PFD1_594M, + imx_clk_pfd("pll2_pfd1_594m", "pll2_sys", base + 0x100, 1)); + clk_dm(IMXRT1020_CLK_PLL2_PFD2_396M, + imx_clk_pfd("pll2_pfd2_396m", "pll2_sys", base + 0x100, 2)); + clk_dm(IMXRT1020_CLK_PLL2_PFD3_297M, + imx_clk_pfd("pll2_pfd3_297m", "pll2_sys", base + 0x100, 3)); + clk_dm(IMXRT1020_CLK_PLL3_PFD1_664_62M, + imx_clk_pfd("pll3_pfd1_664_62m", "pll3_usb_otg", base + 0xf0, 1)); + clk_dm(IMXRT1020_CLK_PLL3_PFD3_454_74M, + imx_clk_pfd("pll3_pfd3_454_74m", "pll3_usb_otg", base + 0xf0, 3)); + + /* CCM clocks */ + base = dev_read_addr_ptr(dev); + if (base == (void *)FDT_ADDR_T_NONE) + return -EINVAL; + + clk_dm(IMXRT1020_CLK_PRE_PERIPH_SEL, + imx_clk_mux("pre_periph_sel", base + 0x18, 18, 2, + pre_periph_sels, ARRAY_SIZE(pre_periph_sels))); + clk_dm(IMXRT1020_CLK_PERIPH_SEL, + imx_clk_mux("periph_sel", base + 0x14, 25, 1, + periph_sels, ARRAY_SIZE(periph_sels))); + clk_dm(IMXRT1020_CLK_USDHC1_SEL, + imx_clk_mux("usdhc1_sel", base + 0x1c, 16, 1, + usdhc_sels, ARRAY_SIZE(usdhc_sels))); + clk_dm(IMXRT1020_CLK_USDHC2_SEL, + imx_clk_mux("usdhc2_sel", base + 0x1c, 17, 1, + usdhc_sels, ARRAY_SIZE(usdhc_sels))); + clk_dm(IMXRT1020_CLK_LPUART_SEL, + imx_clk_mux("lpuart_sel", base + 0x24, 6, 1, + lpuart_sels, ARRAY_SIZE(lpuart_sels))); + clk_dm(IMXRT1020_CLK_SEMC_ALT_SEL, + imx_clk_mux("semc_alt_sel", base + 0x14, 7, 1, + semc_alt_sels, ARRAY_SIZE(semc_alt_sels))); + clk_dm(IMXRT1020_CLK_SEMC_SEL, + imx_clk_mux("semc_sel", base + 0x14, 6, 1, + semc_sels, ARRAY_SIZE(semc_sels))); + + clk_dm(IMXRT1020_CLK_AHB_PODF, + imx_clk_divider("ahb_podf", "periph_sel", + base + 0x14, 10, 3)); + clk_dm(IMXRT1020_CLK_USDHC1_PODF, + imx_clk_divider("usdhc1_podf", "usdhc1_sel", + base + 0x24, 11, 3)); + clk_dm(IMXRT1020_CLK_USDHC2_PODF, + imx_clk_divider("usdhc2_podf", "usdhc2_sel", + base + 0x24, 16, 3)); + clk_dm(IMXRT1020_CLK_LPUART_PODF, + imx_clk_divider("lpuart_podf", "lpuart_sel", + base + 0x24, 0, 6)); + clk_dm(IMXRT1020_CLK_SEMC_PODF, + imx_clk_divider("semc_podf", "semc_sel", + base + 0x14, 16, 3)); + + clk_dm(IMXRT1020_CLK_USDHC1, + imx_clk_gate2("usdhc1", "usdhc1_podf", base + 0x80, 2)); + clk_dm(IMXRT1020_CLK_USDHC2, + imx_clk_gate2("usdhc2", "usdhc2_podf", base + 0x80, 4)); + clk_dm(IMXRT1020_CLK_LPUART1, + imx_clk_gate2("lpuart1", "lpuart_podf", base + 0x7c, 24)); + clk_dm(IMXRT1020_CLK_SEMC, + imx_clk_gate2("semc", "semc_podf", base + 0x74, 4)); + +#ifdef CONFIG_SPL_BUILD + struct clk *clk, *clk1; + + clk_get_by_id(IMXRT1020_CLK_SEMC_SEL, &clk1); + clk_get_by_id(IMXRT1020_CLK_SEMC_ALT_SEL, &clk); + clk_set_parent(clk1, clk); + + /* Configure PLL3_USB_OTG to 480MHz */ + clk_get_by_id(IMXRT1020_CLK_PLL3_USB_OTG, &clk); + clk_enable(clk); + clk_set_rate(clk, 480000000UL); + + clk_get_by_id(IMXRT1020_CLK_PLL3_BYPASS, &clk1); + clk_set_parent(clk1, clk); + + clk_get_by_id(IMXRT1020_CLK_PLL2_PFD3_297M, &clk); + clk_set_rate(clk, 297000000UL); + + clk_get_by_id(IMXRT1020_CLK_PLL2_SYS, &clk); + clk_enable(clk); + clk_set_rate(clk, 528000000UL); + + clk_get_by_id(IMXRT1020_CLK_PLL2_BYPASS, &clk1); + clk_set_parent(clk1, clk); + +#endif + + return 0; +} + +static const struct udevice_id imxrt1020_clk_ids[] = { + { .compatible = "fsl,imxrt1020-ccm" }, + { }, +}; + +U_BOOT_DRIVER(imxrt1020_clk) = { + .name = "clk_imxrt1020", + .id = UCLASS_CLK, + .of_match = imxrt1020_clk_ids, + .ops = &imxrt1020_clk_ops, + .probe = imxrt1020_clk_probe, + .flags = DM_FLAG_PRE_RELOC, +}; diff --git a/include/dt-bindings/clock/imxrt1020-clock.h b/include/dt-bindings/clock/imxrt1020-clock.h new file mode 100644 index 0000000000..836244358b --- /dev/null +++ b/include/dt-bindings/clock/imxrt1020-clock.h @@ -0,0 +1,52 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright(C) 2020 + * Author(s): Giulio Benetti + */ + +#ifndef __DT_BINDINGS_CLOCK_IMXRT1020_H +#define __DT_BINDINGS_CLOCK_IMXRT1020_H + +#define IMXRT1020_CLK_DUMMY 0 +#define IMXRT1020_CLK_CKIL 1 +#define IMXRT1020_CLK_CKIH 2 +#define IMXRT1020_CLK_OSC 3 +#define IMXRT1020_CLK_PLL2_PFD0_352M 4 +#define IMXRT1020_CLK_PLL2_PFD1_594M 5 +#define IMXRT1020_CLK_PLL2_PFD2_396M 6 +#define IMXRT1020_CLK_PLL2_PFD3_297M 7 +#define IMXRT1020_CLK_PLL3_PFD0_720M 8 +#define IMXRT1020_CLK_PLL3_PFD1_664_62M 9 +#define IMXRT1020_CLK_PLL3_PFD2_508_24M 10 +#define IMXRT1020_CLK_PLL3_PFD3_454_74M 11 +#define IMXRT1020_CLK_PLL2_198M 12 +#define IMXRT1020_CLK_PLL3_120M 13 +#define IMXRT1020_CLK_PLL3_80M 14 +#define IMXRT1020_CLK_PLL3_60M 15 +#define IMXRT1020_CLK_PLL2_BYPASS 16 +#define IMXRT1020_CLK_PLL3_BYPASS 17 +#define IMXRT1020_CLK_PLL6_BYPASS 18 +#define IMXRT1020_CLK_PRE_PERIPH_SEL 19 +#define IMXRT1020_CLK_PERIPH_SEL 20 +#define IMXRT1020_CLK_SEMC_ALT_SEL 21 +#define IMXRT1020_CLK_SEMC_SEL 22 +#define IMXRT1020_CLK_USDHC1_SEL 23 +#define IMXRT1020_CLK_USDHC2_SEL 24 +#define IMXRT1020_CLK_LPUART_SEL 25 +#define IMXRT1020_CLK_ARM_PODF 26 +#define IMXRT1020_CLK_LPUART_PODF 27 +#define IMXRT1020_CLK_USDHC1_PODF 28 +#define IMXRT1020_CLK_USDHC2_PODF 29 +#define IMXRT1020_CLK_SEMC_PODF 30 +#define IMXRT1020_CLK_AHB_PODF 31 +#define IMXRT1020_CLK_USDHC1 32 +#define IMXRT1020_CLK_USDHC2 33 +#define IMXRT1020_CLK_LPUART1 34 +#define IMXRT1020_CLK_SEMC 35 +#define IMXRT1020_CLK_PLL2_SYS 36 +#define IMXRT1020_CLK_PLL3_USB_OTG 37 +#define IMXRT1020_CLK_PLL4_AUDIO 38 +#define IMXRT1020_CLK_PLL6_ENET 39 +#define IMXRT1020_CLK_END 40 + +#endif /* __DT_BINDINGS_CLOCK_IMXRT1020_H */ -- 2.25.1