[PATCH v7 5/7] clk: imx: Add initial support for i.MXRT1050 clock driver

[Jesse Taube <mr.bossman075@gmail.com>]

Add clock driver support for i.MXRT1050.

Signed-off-by: Jesse Taube <Mr.Bossman075@gmail.com>
Suggested-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
---
V1->V2:
* Kconfig: Add new line
* clk-imxrt.c: Remove unused const
* clk-imxrt.c: Remove set parents
* clk-imxrt.c: Use fsl,imxrt-anatop for anatop base address
V2->V3:
* Remove unused ANATOP_BASE_ADDR
* Move to hw API
* Add GPT's own clock
* Add SEMC clocks to set muxing to CRITICAL
V3->V4:
* Rename clk-imxrt.c to clk-imxrt1050.c
* Rename CONFIG_CLK_IMXRT to CONFIG_CLK_IMXRT1050
* Make CONFIG_CLK_IMXRT1050 selectable
V4->V5:
* Move to platform driver
V5->V6:
* Remove "fsl" from platform driver name
V6->V7:
* Remove GPT
* Remove of_match_ptr
V7->V8:
* Add help message
* Change to config to tristate
* Fix Makefile ordering
* Remove unused inlcude
* Remove imxrt_clocks_common_init
---
 drivers/clk/imx/Kconfig         |   7 ++
 drivers/clk/imx/Makefile        |   1 +
 drivers/clk/imx/clk-imxrt1050.c | 168 ++++++++++++++++++++++++++++++++
 3 files changed, 176 insertions(+)
 create mode 100644 drivers/clk/imx/clk-imxrt1050.c

diff --git a/drivers/clk/imx/Kconfig b/drivers/clk/imx/Kconfig
index c08edbd04d22..45641b8bdc50 100644
--- a/drivers/clk/imx/Kconfig
+++ b/drivers/clk/imx/Kconfig
@@ -105,3 +105,10 @@ config CLK_IMX8ULP
 	select MXC_CLK
 	help
 	    Build the driver for i.MX8ULP CCM Clock Driver
+
+config CLK_IMXRT1050
+	tristate "IMXRT1050 CCM Clock Driver"
+	depends on SOC_IMXRT
+	select MXC_CLK
+	help
+	    Build the driver for i.MXRT1050 CCM Clock Driver
diff --git a/drivers/clk/imx/Makefile b/drivers/clk/imx/Makefile
index b5e040026dfb..1e13c5cb37d9 100644
--- a/drivers/clk/imx/Makefile
+++ b/drivers/clk/imx/Makefile
@@ -46,4 +46,5 @@ obj-$(CONFIG_CLK_IMX6SX) += clk-imx6sx.o
 obj-$(CONFIG_CLK_IMX6UL) += clk-imx6ul.o
 obj-$(CONFIG_CLK_IMX7D)  += clk-imx7d.o
 obj-$(CONFIG_CLK_IMX7ULP) += clk-imx7ulp.o
+obj-$(CONFIG_CLK_IMXRT1050)  += clk-imxrt1050.o
 obj-$(CONFIG_CLK_VF610)  += clk-vf610.o
diff --git a/drivers/clk/imx/clk-imxrt1050.c b/drivers/clk/imx/clk-imxrt1050.c
new file mode 100644
index 000000000000..9539d35588ee
--- /dev/null
+++ b/drivers/clk/imx/clk-imxrt1050.c
@@ -0,0 +1,168 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright (C) 2021
+ * Author(s):
+ * Jesse Taube <Mr.Bossman075@gmail.com>
+ * Giulio Benetti <giulio.benetti@benettiengineering.com>
+ */
+#include <linux/clk.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/platform_device.h>
+#include <dt-bindings/clock/imxrt1050-clock.h>
+
+#include "clk.h"
+
+static const char * const pll_ref_sels[] = {"osc", "dummy", };
+static const char * const per_sels[] = {"ipg_pdof", "osc", };
+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 lcdif_sels[] = {
+	"pll2_sys", "pll3_pfd3_454_74m", "pll5_video", "pll2_pfd0_352m",
+	"pll2_pfd1_594m", "pll3_pfd1_664_62m", };
+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 struct clk_hw **hws;
+static struct clk_hw_onecell_data *clk_hw_data;
+
+static int imxrt1050_clocks_probe(struct platform_device *pdev)
+{
+	void __iomem *ccm_base;
+	void __iomem *pll_base;
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct device_node *anp;
+	int ret;
+
+	clk_hw_data = kzalloc(struct_size(clk_hw_data, hws,
+					  IMXRT1050_CLK_END), GFP_KERNEL);
+	if (WARN_ON(!clk_hw_data))
+		return -ENOMEM;
+
+	clk_hw_data->num = IMXRT1050_CLK_END;
+	hws = clk_hw_data->hws;
+
+	hws[IMXRT1050_CLK_OSC] = imx_obtain_fixed_clk_hw(np, "osc");
+
+	anp = of_find_compatible_node(NULL, NULL, "fsl,imxrt-anatop");
+	pll_base = of_iomap(anp, 0);
+	of_node_put(anp);
+	if (WARN_ON(!pll_base))
+		return -ENOMEM;
+
+	/* Anatop clocks */
+	hws[IMXRT1050_CLK_DUMMY] = imx_clk_hw_fixed("dummy", 0UL);
+
+	hws[IMXRT1050_CLK_PLL1_REF_SEL] = imx_clk_hw_mux("pll1_arm_ref_sel",
+		pll_base + 0x0, 14, 2, pll_ref_sels, ARRAY_SIZE(pll_ref_sels));
+	hws[IMXRT1050_CLK_PLL2_REF_SEL] = imx_clk_hw_mux("pll2_sys_ref_sel",
+		pll_base + 0x30, 14, 2, pll_ref_sels, ARRAY_SIZE(pll_ref_sels));
+	hws[IMXRT1050_CLK_PLL3_REF_SEL] = imx_clk_hw_mux("pll3_usb_otg_ref_sel",
+		pll_base + 0x10, 14, 2, pll_ref_sels, ARRAY_SIZE(pll_ref_sels));
+	hws[IMXRT1050_CLK_PLL5_REF_SEL] = imx_clk_hw_mux("pll5_video_ref_sel",
+		pll_base + 0xa0, 14, 2, pll_ref_sels, ARRAY_SIZE(pll_ref_sels));
+
+	hws[IMXRT1050_CLK_PLL1_ARM] = imx_clk_hw_pllv3(IMX_PLLV3_SYS, "pll1_arm",
+		"pll1_arm_ref_sel", pll_base + 0x0, 0x7f);
+	hws[IMXRT1050_CLK_PLL2_SYS] = imx_clk_hw_pllv3(IMX_PLLV3_GENERIC, "pll2_sys",
+		"pll2_sys_ref_sel", pll_base + 0x30, 0x1);
+	hws[IMXRT1050_CLK_PLL3_USB_OTG] = imx_clk_hw_pllv3(IMX_PLLV3_USB, "pll3_usb_otg",
+		"pll3_usb_otg_ref_sel", pll_base + 0x10, 0x1);
+	hws[IMXRT1050_CLK_PLL5_VIDEO] = imx_clk_hw_pllv3(IMX_PLLV3_AV, "pll5_video",
+		"pll5_video_ref_sel", pll_base + 0xa0, 0x7f);
+
+	/* PLL bypass out */
+	hws[IMXRT1050_CLK_PLL1_BYPASS] = imx_clk_hw_mux_flags("pll1_bypass", pll_base + 0x0, 16, 1,
+		pll1_bypass_sels, ARRAY_SIZE(pll1_bypass_sels), CLK_SET_RATE_PARENT);
+	hws[IMXRT1050_CLK_PLL2_BYPASS] = imx_clk_hw_mux_flags("pll2_bypass", pll_base + 0x30, 16, 1,
+		pll2_bypass_sels, ARRAY_SIZE(pll2_bypass_sels), CLK_SET_RATE_PARENT);
+	hws[IMXRT1050_CLK_PLL3_BYPASS] = imx_clk_hw_mux_flags("pll3_bypass", pll_base + 0x10, 16, 1,
+		pll3_bypass_sels, ARRAY_SIZE(pll3_bypass_sels), CLK_SET_RATE_PARENT);
+	hws[IMXRT1050_CLK_PLL5_BYPASS] = imx_clk_hw_mux_flags("pll5_bypass", pll_base + 0xa0, 16, 1,
+		pll5_bypass_sels, ARRAY_SIZE(pll5_bypass_sels), CLK_SET_RATE_PARENT);
+
+	hws[IMXRT1050_CLK_VIDEO_POST_DIV_SEL] = imx_clk_hw_divider("video_post_div_sel",
+		"pll5_video", pll_base + 0xa0, 19, 2);
+	hws[IMXRT1050_CLK_VIDEO_DIV] = imx_clk_hw_divider("video_div",
+		"video_post_div_sel", pll_base + 0x170, 30, 2);
+
+	hws[IMXRT1050_CLK_PLL3_80M] = imx_clk_hw_fixed_factor("pll3_80m",  "pll3_usb_otg", 1, 6);
+
+	hws[IMXRT1050_CLK_PLL2_PFD0_352M] = imx_clk_hw_pfd("pll2_pfd0_352m", "pll2_sys", pll_base + 0x100, 0);
+	hws[IMXRT1050_CLK_PLL2_PFD1_594M] = imx_clk_hw_pfd("pll2_pfd1_594m", "pll2_sys", pll_base + 0x100, 1);
+	hws[IMXRT1050_CLK_PLL2_PFD2_396M] = imx_clk_hw_pfd("pll2_pfd2_396m", "pll2_sys", pll_base + 0x100, 2);
+	hws[IMXRT1050_CLK_PLL3_PFD1_664_62M] = imx_clk_hw_pfd("pll3_pfd1_664_62m", "pll3_usb_otg", pll_base + 0xf0, 1);
+	hws[IMXRT1050_CLK_PLL3_PFD3_454_74M] = imx_clk_hw_pfd("pll3_pfd3_454_74m", "pll3_usb_otg", pll_base + 0xf0, 3);
+
+	/* CCM clocks */
+	ccm_base = devm_platform_ioremap_resource(pdev, 0);
+	if (WARN_ON(IS_ERR(ccm_base)))
+		return PTR_ERR(ccm_base);
+
+	hws[IMXRT1050_CLK_ARM_PODF] = imx_clk_hw_divider("arm_podf", "pll1_arm", ccm_base + 0x10, 0, 3);
+	hws[IMXRT1050_CLK_PRE_PERIPH_SEL] = imx_clk_hw_mux("pre_periph_sel", ccm_base + 0x18, 18, 2,
+		pre_periph_sels, ARRAY_SIZE(pre_periph_sels));
+	hws[IMXRT1050_CLK_PERIPH_SEL] = imx_clk_hw_mux("periph_sel", ccm_base + 0x14, 25, 1,
+		periph_sels, ARRAY_SIZE(periph_sels));
+	hws[IMXRT1050_CLK_USDHC1_SEL] = imx_clk_hw_mux("usdhc1_sel", ccm_base + 0x1c, 16, 1,
+		usdhc_sels, ARRAY_SIZE(usdhc_sels));
+	hws[IMXRT1050_CLK_USDHC2_SEL] = imx_clk_hw_mux("usdhc2_sel", ccm_base + 0x1c, 17, 1,
+		usdhc_sels, ARRAY_SIZE(usdhc_sels));
+	hws[IMXRT1050_CLK_LPUART_SEL] = imx_clk_hw_mux("lpuart_sel", ccm_base + 0x24, 6, 1,
+		lpuart_sels, ARRAY_SIZE(lpuart_sels));
+	hws[IMXRT1050_CLK_LCDIF_SEL] = imx_clk_hw_mux("lcdif_sel", ccm_base + 0x38, 15, 3,
+		lcdif_sels, ARRAY_SIZE(lcdif_sels));
+	hws[IMXRT1050_CLK_PER_CLK_SEL] = imx_clk_hw_mux("per_sel", ccm_base + 0x1C, 6, 1,
+		per_sels, ARRAY_SIZE(per_sels));
+	hws[IMXRT1050_CLK_SEMC_ALT_SEL] = imx_clk_hw_mux("semc_alt_sel", ccm_base + 0x14, 7, 1,
+		semc_alt_sels, ARRAY_SIZE(semc_alt_sels));
+	hws[IMXRT1050_CLK_SEMC_SEL] = imx_clk_hw_mux_flags("semc_sel", ccm_base + 0x14, 6, 1,
+		semc_sels, ARRAY_SIZE(semc_sels), CLK_IS_CRITICAL);
+
+	hws[IMXRT1050_CLK_AHB_PODF] = imx_clk_hw_divider("ahb", "periph_sel", ccm_base + 0x14, 10, 3);
+	hws[IMXRT1050_CLK_IPG_PDOF] = imx_clk_hw_divider("ipg", "ahb", ccm_base + 0x14, 8, 2);
+	hws[IMXRT1050_CLK_PER_PDOF] = imx_clk_hw_divider("per", "per_sel", ccm_base + 0x1C, 0, 5);
+
+	hws[IMXRT1050_CLK_USDHC1_PODF] = imx_clk_hw_divider("usdhc1_podf", "usdhc1_sel", ccm_base + 0x24, 11, 3);
+	hws[IMXRT1050_CLK_USDHC2_PODF] = imx_clk_hw_divider("usdhc2_podf", "usdhc2_sel", ccm_base + 0x24, 16, 3);
+	hws[IMXRT1050_CLK_LPUART_PODF] = imx_clk_hw_divider("lpuart_podf", "lpuart_sel", ccm_base + 0x24, 0, 6);
+	hws[IMXRT1050_CLK_LCDIF_PRED] = imx_clk_hw_divider("lcdif_pred", "lcdif_sel", ccm_base + 0x38, 12, 3);
+	hws[IMXRT1050_CLK_LCDIF_PODF] = imx_clk_hw_divider("lcdif_podf", "lcdif_pred", ccm_base + 0x18, 23, 3);
+
+	hws[IMXRT1050_CLK_USDHC1] = imx_clk_hw_gate2("usdhc1", "usdhc1_podf", ccm_base + 0x80, 2);
+	hws[IMXRT1050_CLK_USDHC2] = imx_clk_hw_gate2("usdhc2", "usdhc2_podf", ccm_base + 0x80, 4);
+	hws[IMXRT1050_CLK_LPUART1] = imx_clk_hw_gate2("lpuart1", "lpuart_podf", ccm_base + 0x7c, 24);
+	hws[IMXRT1050_CLK_LCDIF_APB] = imx_clk_hw_gate2("lcdif", "lcdif_podf", ccm_base + 0x74, 10);
+	hws[IMXRT1050_CLK_DMA] = imx_clk_hw_gate("dma", "ipg", ccm_base + 0x7C, 6);
+	hws[IMXRT1050_CLK_DMA_MUX] = imx_clk_hw_gate("dmamux0", "ipg", ccm_base + 0x7C, 7);
+	imx_check_clk_hws(hws, IMXRT1050_CLK_END);
+
+	ret = of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_hw_data);
+	if (ret < 0) {
+		dev_err(dev, "Failed to register clks for i.MXRT1050.\n");
+		imx_unregister_hw_clocks(hws, IMXRT1050_CLK_END);
+	}
+	return ret;
+}
+static const struct of_device_id imxrt1050_clk_of_match[] = {
+	{ .compatible = "fsl,imxrt1050-ccm" },
+	{ /* Sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imxrt1050_clk_of_match);
+
+static struct platform_driver imxrt1050_clk_driver = {
+	.probe = imxrt1050_clocks_probe,
+	.driver = {
+		.name = "imxrt1050-ccm",
+		.of_match_table = imxrt1050_clk_of_match,
+	},
+};
+module_platform_driver(imxrt1050_clk_driver);
-- 
2.34.1