[PATCH 1/5] clk: imx: add i.IMXRT1020 clk driver
Lukasz Majewski
lukma at denx.de
Thu Feb 20 23:33:58 CET 2020
On Tue, 18 Feb 2020 20:02:51 +0100
Giulio Benetti <giulio.benetti at benettiengineering.com> wrote:
> Add i.MXRT1020 clk driver support.
>
> Signed-off-by: Giulio Benetti <giulio.benetti at benettiengineering.com>
> ---
> 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 <giulio.benetti at benettiengineering.com>
> + */
> +
> +#include <common.h>
> +#include <clk.h>
> +#include <clk-uclass.h>
> +#include <dm.h>
> +#include <asm/arch/clock.h>
> +#include <asm/arch/imx-regs.h>
> +#include <dt-bindings/clock/imxrt1020-clock.h>
> +
> +#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 <giulio.benetti at benettiengineering.com>
> + */
> +
> +#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 */
Reviewed-by: Lukasz Majewski <lukma at denx.de>
Best regards,
Lukasz Majewski
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma at denx.de
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