[PATCH v2 11/21] clk: imx: add i.IMXRT1050 clk driver

Giulio Benetti
2020-01-10T14:47:01Z

Add i.MXRT1050 clk driver support.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
---
drivers/clk/imx/Kconfig | 16 ++
drivers/clk/imx/Makefile | 2 +
drivers/clk/imx/clk-imxrt1050.c | 292 ++++++++++++++++++++
include/dt-bindings/clock/imxrt1050-clock.h | 65 +++++
4 files changed, 375 insertions(+)
create mode 100644 drivers/clk/imx/clk-imxrt1050.c
create mode 100644 include/dt-bindings/clock/imxrt1050-clock.h

diff --git a/drivers/clk/imx/Kconfig b/drivers/clk/imx/Kconfig
index 2f149ff6f8..059bc2fbb9 100644
--- a/drivers/clk/imx/Kconfig
+++ b/drivers/clk/imx/Kconfig
@@ -68,3 +68,19 @@ config CLK_IMX8MP
select CLK_CCF
help
This enables support clock driver for i.MX8MP platforms.
+
+config SPL_CLK_IMXRT1050
+ bool "SPL clock support for i.MXRT1050"
+ depends on ARCH_IMXRT && SPL
+ select SPL_CLK
+ select SPL_CLK_CCF
+ help
+ This enables SPL DM/DTS support for clock driver in i.MXRT1050
+
+config CLK_IMXRT1050
+ bool "Clock support for i.MXRT1050"
+ depends on ARCH_IMXRT
+ select CLK
+ select CLK_CCF
+ help
+ This enables support clock driver for i.MXRT1050 platforms.
diff --git a/drivers/clk/imx/Makefile b/drivers/clk/imx/Makefile
index 255a87b18e..1e8a49d0f3 100644
--- a/drivers/clk/imx/Makefile
+++ b/drivers/clk/imx/Makefile
@@ -16,3 +16,5 @@ obj-$(CONFIG_$(SPL_TPL_)CLK_IMX8MN) += clk-imx8mn.o clk-pll14xx.o \
clk-composite-8m.o
obj-$(CONFIG_$(SPL_TPL_)CLK_IMX8MP) += clk-imx8mp.o clk-pll14xx.o \
clk-composite-8m.o
+
+obj-$(CONFIG_$(SPL_TPL_)CLK_IMXRT1050) += clk-imxrt1050.o
diff --git a/drivers/clk/imx/clk-imxrt1050.c b/drivers/clk/imx/clk-imxrt1050.c
new file mode 100644
index 0000000000..44ca52c013
--- /dev/null
+++ b/drivers/clk/imx/clk-imxrt1050.c
@@ -0,0 +1,292 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright(C) 2019
+ * Author(s): Giulio Benetti <giulio.benetti@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/imxrt1050-clock.h>
+
+#include "clk.h"
+
+static ulong imxrt1050_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 imxrt1050_clk_set_rate(struct clk *clk, ulong 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 __imxrt1050_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 imxrt1050_clk_disable(struct clk *clk)
+{
+ return __imxrt1050_clk_enable(clk, 0);
+}
+
+static int imxrt1050_clk_enable(struct clk *clk)
+{
+ return __imxrt1050_clk_enable(clk, 1);
+}
+
+static struct clk_ops imxrt1050_clk_ops = {
+ .set_rate = imxrt1050_clk_set_rate,
+ .get_rate = imxrt1050_clk_get_rate,
+ .enable = imxrt1050_clk_enable,
+ .disable = imxrt1050_clk_disable,
+};
+
+static const char * const pll_ref_sels[] = {"osc", "dummy", };
+static const char * const pll1_bypass_sels[] = {"pll1_arm", "pll1_arm_ref_sel", };
+static const char * const pll2_bypass_sels[] = {"pll2_sys", "pll2_sys_ref_sel", };
+static const char * const pll3_bypass_sels[] = {"pll3_usb_otg", "pll3_usb_otg_ref_sel", };
+static const char * const pll5_bypass_sels[] = {"pll5_video", "pll5_video_ref_sel", };
+
+static const char *const pre_periph_sels[] = { "pll2_sys", "pll2_pfd2_396m", "pll2_pfd0_352m", "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 const char *const lcdif_sels[] = { "pll2_sys", "pll3_pfd3_454_74m", "pll5_video:", "pll2_pfd0_352m", "pll2_pfd1_594m", "pll3_pfd1_664_62m"};
+
+static int imxrt1050_clk_probe(struct udevice *dev)
+{
+ void *base;
+
+ /* Anatop clocks */
+ base = (void *)ANATOP_BASE_ADDR;
+
+ clk_dm(IMXRT1050_CLK_PLL1_REF_SEL,
+ imx_clk_mux("pll1_arm_ref_sel", base + 0x0, 14, 2,
+ pll_ref_sels, ARRAY_SIZE(pll_ref_sels)));
+ clk_dm(IMXRT1050_CLK_PLL2_REF_SEL,
+ imx_clk_mux("pll2_sys_ref_sel", base + 0x30, 14, 2,
+ pll_ref_sels, ARRAY_SIZE(pll_ref_sels)));
+ clk_dm(IMXRT1050_CLK_PLL3_REF_SEL,
+ imx_clk_mux("pll3_usb_otg_ref_sel", base + 0x10, 14, 2,
+ pll_ref_sels, ARRAY_SIZE(pll_ref_sels)));
+ clk_dm(IMXRT1050_CLK_PLL5_REF_SEL,
+ imx_clk_mux("pll5_video_ref_sel", base + 0xa0, 14, 2,
+ pll_ref_sels, ARRAY_SIZE(pll_ref_sels)));
+
+ clk_dm(IMXRT1050_CLK_PLL1_ARM,
+ imx_clk_pllv3(IMX_PLLV3_SYS, "pll1_arm", "pll1_arm_ref_sel",
+ base + 0x0, 0x7f));
+ clk_dm(IMXRT1050_CLK_PLL2_SYS,
+ imx_clk_pllv3(IMX_PLLV3_GENERIC, "pll2_sys", "pll2_sys_ref_sel",
+ base + 0x30, 0x1));
+ clk_dm(IMXRT1050_CLK_PLL3_USB_OTG,
+ imx_clk_pllv3(IMX_PLLV3_USB, "pll3_usb_otg",
+ "pll3_usb_otg_ref_sel",
+ base + 0x10, 0x1));
+ clk_dm(IMXRT1050_CLK_PLL5_VIDEO,
+ imx_clk_pllv3(IMX_PLLV3_AV, "pll5_video", "pll5_video_ref_sel",
+ base + 0xa0, 0x7f));
+
+ /* PLL bypass out */
+ clk_dm(IMXRT1050_CLK_PLL1_BYPASS,
+ imx_clk_mux_flags("pll1_bypass", base + 0x0, 16, 1,
+ pll1_bypass_sels,
+ ARRAY_SIZE(pll1_bypass_sels),
+ CLK_SET_RATE_PARENT));
+ clk_dm(IMXRT1050_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(IMXRT1050_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(IMXRT1050_CLK_PLL5_BYPASS,
+ imx_clk_mux_flags("pll5_bypass", base + 0xa0, 16, 1,
+ pll5_bypass_sels,
+ ARRAY_SIZE(pll5_bypass_sels),
+ CLK_SET_RATE_PARENT));
+
+ clk_dm(IMXRT1050_CLK_VIDEO_POST_DIV_SEL,
+ imx_clk_divider("video_post_div_sel", "pll5_video",
+ base + 0xa0, 19, 2));
+ clk_dm(IMXRT1050_CLK_VIDEO_DIV,
+ imx_clk_divider("video_div", "video_post_div_sel",
+ base + 0x170, 30, 2));
+
+ clk_dm(IMXRT1050_CLK_PLL3_80M,
+ imx_clk_fixed_factor("pll3_80m", "pll3_usb_otg", 1, 6));
+
+ clk_dm(IMXRT1050_CLK_PLL2_PFD0_352M,
+ imx_clk_pfd("pll2_pfd0_352m", "pll2_sys", base + 0x100, 0));
+ clk_dm(IMXRT1050_CLK_PLL2_PFD1_594M,
+ imx_clk_pfd("pll2_pfd1_594m", "pll2_sys", base + 0x100, 1));
+ clk_dm(IMXRT1050_CLK_PLL2_PFD2_396M,
+ imx_clk_pfd("pll2_pfd2_396m", "pll2_sys", base + 0x100, 2));
+ clk_dm(IMXRT1050_CLK_PLL3_PFD1_664_62M,
+ imx_clk_pfd("pll3_pfd1_664_62m", "pll3_usb_otg", base + 0xf0,
+ 1));
+ clk_dm(IMXRT1050_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(IMXRT1050_CLK_ARM_PODF,
+ imx_clk_divider("arm_podf", "pll1_arm",
+ base + 0x10, 0, 3));
+
+ clk_dm(IMXRT1050_CLK_PRE_PERIPH_SEL,
+ imx_clk_mux("pre_periph_sel", base + 0x18, 18, 2,
+ pre_periph_sels, ARRAY_SIZE(pre_periph_sels)));
+ clk_dm(IMXRT1050_CLK_PERIPH_SEL,
+ imx_clk_mux("periph_sel", base + 0x14, 25, 1,
+ periph_sels, ARRAY_SIZE(periph_sels)));
+ clk_dm(IMXRT1050_CLK_USDHC1_SEL,
+ imx_clk_mux("usdhc1_sel", base + 0x1c, 16, 1,
+ usdhc_sels, ARRAY_SIZE(usdhc_sels)));
+ clk_dm(IMXRT1050_CLK_USDHC2_SEL,
+ imx_clk_mux("usdhc2_sel", base + 0x1c, 17, 1,
+ usdhc_sels, ARRAY_SIZE(usdhc_sels)));
+ clk_dm(IMXRT1050_CLK_LPUART_SEL,
+ imx_clk_mux("lpuart_sel", base + 0x24, 6, 1,
+ lpuart_sels, ARRAY_SIZE(lpuart_sels)));
+ clk_dm(IMXRT1050_CLK_SEMC_ALT_SEL,
+ imx_clk_mux("semc_alt_sel", base + 0x14, 7, 1,
+ semc_alt_sels, ARRAY_SIZE(semc_alt_sels)));
+ clk_dm(IMXRT1050_CLK_SEMC_SEL,
+ imx_clk_mux("semc_sel", base + 0x14, 6, 1,
+ semc_sels, ARRAY_SIZE(semc_sels)));
+ clk_dm(IMXRT1050_CLK_LCDIF_SEL,
+ imx_clk_mux("lcdif_sel", base + 0x38, 15, 3,
+ lcdif_sels, ARRAY_SIZE(lcdif_sels)));
+
+ clk_dm(IMXRT1050_CLK_AHB_PODF,
+ imx_clk_divider("ahb_podf", "periph_sel",
+ base + 0x14, 10, 3));
+ clk_dm(IMXRT1050_CLK_USDHC1_PODF,
+ imx_clk_divider("usdhc1_podf", "usdhc1_sel",
+ base + 0x24, 11, 3));
+ clk_dm(IMXRT1050_CLK_USDHC2_PODF,
+ imx_clk_divider("usdhc2_podf", "usdhc2_sel",
+ base + 0x24, 16, 3));
+ clk_dm(IMXRT1050_CLK_LPUART_PODF,
+ imx_clk_divider("lpuart_podf", "lpuart_sel",
+ base + 0x24, 0, 6));
+ clk_dm(IMXRT1050_CLK_SEMC_PODF,
+ imx_clk_divider("semc_podf", "semc_sel",
+ base + 0x14, 16, 3));
+ clk_dm(IMXRT1050_CLK_LCDIF_PRED,
+ imx_clk_divider("lcdif_pred", "lcdif_sel",
+ base + 0x38, 12, 3));
+ clk_dm(IMXRT1050_CLK_LCDIF_PODF,
+ imx_clk_divider("lcdif_podf", "lcdif_pred",
+ base + 0x18, 23, 3));
+
+ clk_dm(IMXRT1050_CLK_USDHC1,
+ imx_clk_gate2("usdhc1", "usdhc1_podf", base + 0x80, 2));
+ clk_dm(IMXRT1050_CLK_USDHC2,
+ imx_clk_gate2("usdhc2", "usdhc2_podf", base + 0x80, 4));
+ clk_dm(IMXRT1050_CLK_LPUART1,
+ imx_clk_gate2("lpuart1", "lpuart_podf", base + 0x7c, 24));
+ clk_dm(IMXRT1050_CLK_SEMC,
+ imx_clk_gate2("semc", "semc_podf", base + 0x74, 4));
+ clk_dm(IMXRT1050_CLK_LCDIF,
+ imx_clk_gate2("lcdif", "lcdif_podf", base + 0x70, 28));
+
+#ifdef CONFIG_SPL_BUILD
+ struct clk *clk, *clk1;
+
+ /* bypass pll1 before setting its rate */
+ clk_get_by_id(IMXRT1050_CLK_PLL1_REF_SEL, &clk);
+ clk_get_by_id(IMXRT1050_CLK_PLL1_BYPASS, &clk1);
+ clk_set_parent(clk1, clk);
+
+ clk_get_by_id(IMXRT1050_CLK_PLL1_ARM, &clk);
+ clk_enable(clk);
+ clk_set_rate(clk, 1056000000UL);
+
+ clk_get_by_id(IMXRT1050_CLK_PLL1_BYPASS, &clk1);
+ clk_set_parent(clk1, clk);
+
+ clk_get_by_id(IMXRT1050_CLK_SEMC_SEL, &clk1);
+ clk_get_by_id(IMXRT1050_CLK_SEMC_ALT_SEL, &clk);
+ clk_set_parent(clk1, clk);
+
+ clk_get_by_id(IMXRT1050_CLK_PLL2_SYS, &clk);
+ clk_enable(clk);
+ clk_set_rate(clk, 528000000UL);
+
+ clk_get_by_id(IMXRT1050_CLK_PLL2_BYPASS, &clk1);
+ clk_set_parent(clk1, clk);
+
+ /* Configure PLL3_USB_OTG to 480MHz */
+ clk_get_by_id(IMXRT1050_CLK_PLL3_USB_OTG, &clk);
+ clk_enable(clk);
+ clk_set_rate(clk, 480000000UL);
+
+ clk_get_by_id(IMXRT1050_CLK_PLL3_BYPASS, &clk1);
+ clk_set_parent(clk1, clk);
+
+#endif
+
+ return 0;
+}
+
+static const struct udevice_id imxrt1050_clk_ids[] = {
+ { .compatible = "fsl,imxrt1050-ccm" },
+ { },
+};
+
+U_BOOT_DRIVER(imxrt1050_clk) = {
+ .name = "clk_imxrt1050",
+ .id = UCLASS_CLK,
+ .of_match = imxrt1050_clk_ids,
+ .ops = &imxrt1050_clk_ops,
+ .probe = imxrt1050_clk_probe,
+ .flags = DM_FLAG_PRE_RELOC,
+};
diff --git a/include/dt-bindings/clock/imxrt1050-clock.h b/include/dt-bindings/clock/imxrt1050-clock.h
new file mode 100644
index 0000000000..c174f90c1a
--- /dev/null
+++ b/include/dt-bindings/clock/imxrt1050-clock.h
@@ -0,0 +1,65 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright(C) 2019
+ * Author(s): Giulio Benetti <giulio.benetti@benettiengineering.com>
+ */
+
+#ifndef __DT_BINDINGS_CLOCK_IMXRT1050_H
+#define __DT_BINDINGS_CLOCK_IMXRT1050_H
+
+#define IMXRT1050_CLK_DUMMY 0
+#define IMXRT1050_CLK_CKIL 1
+#define IMXRT1050_CLK_CKIH 2
+#define IMXRT1050_CLK_OSC 3
+#define IMXRT1050_CLK_PLL2_PFD0_352M 4
+#define IMXRT1050_CLK_PLL2_PFD1_594M 5
+#define IMXRT1050_CLK_PLL2_PFD2_396M 6
+#define IMXRT1050_CLK_PLL3_PFD0_720M 7
+#define IMXRT1050_CLK_PLL3_PFD1_664_62M 8
+#define IMXRT1050_CLK_PLL3_PFD2_508_24M 9
+#define IMXRT1050_CLK_PLL3_PFD3_454_74M 10
+#define IMXRT1050_CLK_PLL2_198M 11
+#define IMXRT1050_CLK_PLL3_120M 12
+#define IMXRT1050_CLK_PLL3_80M 13
+#define IMXRT1050_CLK_PLL3_60M 14
+#define IMXRT1050_CLK_PLL1_BYPASS 15
+#define IMXRT1050_CLK_PLL2_BYPASS 16
+#define IMXRT1050_CLK_PLL3_BYPASS 17
+#define IMXRT1050_CLK_PLL5_BYPASS 19
+#define IMXRT1050_CLK_PLL1_REF_SEL 20
+#define IMXRT1050_CLK_PLL2_REF_SEL 21
+#define IMXRT1050_CLK_PLL3_REF_SEL 22
+#define IMXRT1050_CLK_PLL5_REF_SEL 23
+#define IMXRT1050_CLK_PRE_PERIPH_SEL 24
+#define IMXRT1050_CLK_PERIPH_SEL 25
+#define IMXRT1050_CLK_SEMC_ALT_SEL 26
+#define IMXRT1050_CLK_SEMC_SEL 27
+#define IMXRT1050_CLK_USDHC1_SEL 28
+#define IMXRT1050_CLK_USDHC2_SEL 29
+#define IMXRT1050_CLK_LPUART_SEL 30
+#define IMXRT1050_CLK_LCDIF_SEL 31
+#define IMXRT1050_CLK_VIDEO_POST_DIV_SEL 32
+#define IMXRT1050_CLK_VIDEO_DIV 33
+#define IMXRT1050_CLK_ARM_PODF 34
+#define IMXRT1050_CLK_LPUART_PODF 35
+#define IMXRT1050_CLK_USDHC1_PODF 36
+#define IMXRT1050_CLK_USDHC2_PODF 37
+#define IMXRT1050_CLK_SEMC_PODF 38
+#define IMXRT1050_CLK_AHB_PODF 39
+#define IMXRT1050_CLK_LCDIF_PRED 40
+#define IMXRT1050_CLK_LCDIF_PODF 41
+#define IMXRT1050_CLK_USDHC1 42
+#define IMXRT1050_CLK_USDHC2 43
+#define IMXRT1050_CLK_LPUART1 44
+#define IMXRT1050_CLK_SEMC 45
+#define IMXRT1050_CLK_LCDIF 46
+#define IMXRT1050_CLK_PLL1_ARM 47
+#define IMXRT1050_CLK_PLL2_SYS 48
+#define IMXRT1050_CLK_PLL3_USB_OTG 49
+#define IMXRT1050_CLK_PLL4_AUDIO 50
+#define IMXRT1050_CLK_PLL5_VIDEO 51
+#define IMXRT1050_CLK_PLL6_ENET 52
+#define IMXRT1050_CLK_PLL7_USB_HOST 53
+#define IMXRT1050_CLK_END 54
+
+#endif /* __DT_BINDINGS_CLOCK_IMXRT1050_H */
--
2.20.1