174 lines
8.4 KiB
C
174 lines
8.4 KiB
C
// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
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/*
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* Copyright (C) 2021
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* Author(s):
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* Jesse Taube <Mr.Bossman075@gmail.com>
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* Giulio Benetti <giulio.benetti@benettiengineering.com>
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*/
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#include <linux/clk.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#include <linux/platform_device.h>
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#include <dt-bindings/clock/imxrt1050-clock.h>
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#include "clk.h"
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static const char * const pll_ref_sels[] = {"osc", "dummy", };
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static const char * const per_sels[] = {"ipg_pdof", "osc", };
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static const char * const pll1_bypass_sels[] = {"pll1_arm", "pll1_arm_ref_sel", };
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static const char * const pll2_bypass_sels[] = {"pll2_sys", "pll2_sys_ref_sel", };
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static const char * const pll3_bypass_sels[] = {"pll3_usb_otg", "pll3_usb_otg_ref_sel", };
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static const char * const pll5_bypass_sels[] = {"pll5_video", "pll5_video_ref_sel", };
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static const char *const pre_periph_sels[] = {
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"pll2_sys", "pll2_pfd2_396m", "pll2_pfd0_352m", "arm_podf", };
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static const char *const periph_sels[] = { "pre_periph_sel", "todo", };
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static const char *const usdhc_sels[] = { "pll2_pfd2_396m", "pll2_pfd0_352m", };
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static const char *const lpuart_sels[] = { "pll3_80m", "osc", };
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static const char *const lcdif_sels[] = {
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"pll2_sys", "pll3_pfd3_454_74m", "pll5_video", "pll2_pfd0_352m",
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"pll2_pfd1_594m", "pll3_pfd1_664_62m", };
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static const char *const semc_alt_sels[] = { "pll2_pfd2_396m", "pll3_pfd1_664_62m", };
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static const char *const semc_sels[] = { "periph_sel", "semc_alt_sel", };
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static struct clk_hw **hws;
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static struct clk_hw_onecell_data *clk_hw_data;
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static int imxrt1050_clocks_probe(struct platform_device *pdev)
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{
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void __iomem *ccm_base;
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void __iomem *pll_base;
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struct device *dev = &pdev->dev;
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struct device_node *np = dev->of_node;
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struct device_node *anp;
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int ret;
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clk_hw_data = kzalloc(struct_size(clk_hw_data, hws,
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IMXRT1050_CLK_END), GFP_KERNEL);
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if (WARN_ON(!clk_hw_data))
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return -ENOMEM;
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clk_hw_data->num = IMXRT1050_CLK_END;
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hws = clk_hw_data->hws;
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hws[IMXRT1050_CLK_OSC] = imx_get_clk_hw_by_name(np, "osc");
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anp = of_find_compatible_node(NULL, NULL, "fsl,imxrt-anatop");
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pll_base = of_iomap(anp, 0);
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of_node_put(anp);
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if (WARN_ON(!pll_base))
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return -ENOMEM;
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/* Anatop clocks */
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hws[IMXRT1050_CLK_DUMMY] = imx_clk_hw_fixed("dummy", 0UL);
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hws[IMXRT1050_CLK_PLL1_REF_SEL] = imx_clk_hw_mux("pll1_arm_ref_sel",
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pll_base + 0x0, 14, 2, pll_ref_sels, ARRAY_SIZE(pll_ref_sels));
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hws[IMXRT1050_CLK_PLL2_REF_SEL] = imx_clk_hw_mux("pll2_sys_ref_sel",
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pll_base + 0x30, 14, 2, pll_ref_sels, ARRAY_SIZE(pll_ref_sels));
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hws[IMXRT1050_CLK_PLL3_REF_SEL] = imx_clk_hw_mux("pll3_usb_otg_ref_sel",
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pll_base + 0x10, 14, 2, pll_ref_sels, ARRAY_SIZE(pll_ref_sels));
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hws[IMXRT1050_CLK_PLL5_REF_SEL] = imx_clk_hw_mux("pll5_video_ref_sel",
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pll_base + 0xa0, 14, 2, pll_ref_sels, ARRAY_SIZE(pll_ref_sels));
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hws[IMXRT1050_CLK_PLL1_ARM] = imx_clk_hw_pllv3(IMX_PLLV3_SYS, "pll1_arm",
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"pll1_arm_ref_sel", pll_base + 0x0, 0x7f);
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hws[IMXRT1050_CLK_PLL2_SYS] = imx_clk_hw_pllv3(IMX_PLLV3_GENERIC, "pll2_sys",
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"pll2_sys_ref_sel", pll_base + 0x30, 0x1);
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hws[IMXRT1050_CLK_PLL3_USB_OTG] = imx_clk_hw_pllv3(IMX_PLLV3_USB, "pll3_usb_otg",
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"pll3_usb_otg_ref_sel", pll_base + 0x10, 0x1);
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hws[IMXRT1050_CLK_PLL5_VIDEO] = imx_clk_hw_pllv3(IMX_PLLV3_AV, "pll5_video",
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"pll5_video_ref_sel", pll_base + 0xa0, 0x7f);
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/* PLL bypass out */
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hws[IMXRT1050_CLK_PLL1_BYPASS] = imx_clk_hw_mux_flags("pll1_bypass", pll_base + 0x0, 16, 1,
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pll1_bypass_sels, ARRAY_SIZE(pll1_bypass_sels), CLK_SET_RATE_PARENT);
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hws[IMXRT1050_CLK_PLL2_BYPASS] = imx_clk_hw_mux_flags("pll2_bypass", pll_base + 0x30, 16, 1,
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pll2_bypass_sels, ARRAY_SIZE(pll2_bypass_sels), CLK_SET_RATE_PARENT);
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hws[IMXRT1050_CLK_PLL3_BYPASS] = imx_clk_hw_mux_flags("pll3_bypass", pll_base + 0x10, 16, 1,
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pll3_bypass_sels, ARRAY_SIZE(pll3_bypass_sels), CLK_SET_RATE_PARENT);
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hws[IMXRT1050_CLK_PLL5_BYPASS] = imx_clk_hw_mux_flags("pll5_bypass", pll_base + 0xa0, 16, 1,
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pll5_bypass_sels, ARRAY_SIZE(pll5_bypass_sels), CLK_SET_RATE_PARENT);
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hws[IMXRT1050_CLK_VIDEO_POST_DIV_SEL] = imx_clk_hw_divider("video_post_div_sel",
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"pll5_video", pll_base + 0xa0, 19, 2);
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hws[IMXRT1050_CLK_VIDEO_DIV] = imx_clk_hw_divider("video_div",
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"video_post_div_sel", pll_base + 0x170, 30, 2);
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hws[IMXRT1050_CLK_PLL3_80M] = imx_clk_hw_fixed_factor("pll3_80m", "pll3_usb_otg", 1, 6);
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hws[IMXRT1050_CLK_PLL2_PFD0_352M] = imx_clk_hw_pfd("pll2_pfd0_352m", "pll2_sys", pll_base + 0x100, 0);
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hws[IMXRT1050_CLK_PLL2_PFD1_594M] = imx_clk_hw_pfd("pll2_pfd1_594m", "pll2_sys", pll_base + 0x100, 1);
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hws[IMXRT1050_CLK_PLL2_PFD2_396M] = imx_clk_hw_pfd("pll2_pfd2_396m", "pll2_sys", pll_base + 0x100, 2);
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hws[IMXRT1050_CLK_PLL3_PFD1_664_62M] = imx_clk_hw_pfd("pll3_pfd1_664_62m", "pll3_usb_otg", pll_base + 0xf0, 1);
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hws[IMXRT1050_CLK_PLL3_PFD3_454_74M] = imx_clk_hw_pfd("pll3_pfd3_454_74m", "pll3_usb_otg", pll_base + 0xf0, 3);
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/* CCM clocks */
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ccm_base = devm_platform_ioremap_resource(pdev, 0);
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if (WARN_ON(IS_ERR(ccm_base)))
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return PTR_ERR(ccm_base);
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hws[IMXRT1050_CLK_ARM_PODF] = imx_clk_hw_divider("arm_podf", "pll1_arm", ccm_base + 0x10, 0, 3);
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hws[IMXRT1050_CLK_PRE_PERIPH_SEL] = imx_clk_hw_mux("pre_periph_sel", ccm_base + 0x18, 18, 2,
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pre_periph_sels, ARRAY_SIZE(pre_periph_sels));
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hws[IMXRT1050_CLK_PERIPH_SEL] = imx_clk_hw_mux("periph_sel", ccm_base + 0x14, 25, 1,
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periph_sels, ARRAY_SIZE(periph_sels));
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hws[IMXRT1050_CLK_USDHC1_SEL] = imx_clk_hw_mux("usdhc1_sel", ccm_base + 0x1c, 16, 1,
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usdhc_sels, ARRAY_SIZE(usdhc_sels));
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hws[IMXRT1050_CLK_USDHC2_SEL] = imx_clk_hw_mux("usdhc2_sel", ccm_base + 0x1c, 17, 1,
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usdhc_sels, ARRAY_SIZE(usdhc_sels));
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hws[IMXRT1050_CLK_LPUART_SEL] = imx_clk_hw_mux("lpuart_sel", ccm_base + 0x24, 6, 1,
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lpuart_sels, ARRAY_SIZE(lpuart_sels));
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hws[IMXRT1050_CLK_LCDIF_SEL] = imx_clk_hw_mux("lcdif_sel", ccm_base + 0x38, 15, 3,
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lcdif_sels, ARRAY_SIZE(lcdif_sels));
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hws[IMXRT1050_CLK_PER_CLK_SEL] = imx_clk_hw_mux("per_sel", ccm_base + 0x1C, 6, 1,
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per_sels, ARRAY_SIZE(per_sels));
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hws[IMXRT1050_CLK_SEMC_ALT_SEL] = imx_clk_hw_mux("semc_alt_sel", ccm_base + 0x14, 7, 1,
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semc_alt_sels, ARRAY_SIZE(semc_alt_sels));
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hws[IMXRT1050_CLK_SEMC_SEL] = imx_clk_hw_mux_flags("semc_sel", ccm_base + 0x14, 6, 1,
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semc_sels, ARRAY_SIZE(semc_sels), CLK_IS_CRITICAL);
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hws[IMXRT1050_CLK_AHB_PODF] = imx_clk_hw_divider("ahb", "periph_sel", ccm_base + 0x14, 10, 3);
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hws[IMXRT1050_CLK_IPG_PDOF] = imx_clk_hw_divider("ipg", "ahb", ccm_base + 0x14, 8, 2);
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hws[IMXRT1050_CLK_PER_PDOF] = imx_clk_hw_divider("per", "per_sel", ccm_base + 0x1C, 0, 5);
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hws[IMXRT1050_CLK_USDHC1_PODF] = imx_clk_hw_divider("usdhc1_podf", "usdhc1_sel", ccm_base + 0x24, 11, 3);
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hws[IMXRT1050_CLK_USDHC2_PODF] = imx_clk_hw_divider("usdhc2_podf", "usdhc2_sel", ccm_base + 0x24, 16, 3);
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hws[IMXRT1050_CLK_LPUART_PODF] = imx_clk_hw_divider("lpuart_podf", "lpuart_sel", ccm_base + 0x24, 0, 6);
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hws[IMXRT1050_CLK_LCDIF_PRED] = imx_clk_hw_divider("lcdif_pred", "lcdif_sel", ccm_base + 0x38, 12, 3);
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hws[IMXRT1050_CLK_LCDIF_PODF] = imx_clk_hw_divider("lcdif_podf", "lcdif_pred", ccm_base + 0x18, 23, 3);
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hws[IMXRT1050_CLK_USDHC1] = imx_clk_hw_gate2("usdhc1", "usdhc1_podf", ccm_base + 0x80, 2);
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hws[IMXRT1050_CLK_USDHC2] = imx_clk_hw_gate2("usdhc2", "usdhc2_podf", ccm_base + 0x80, 4);
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hws[IMXRT1050_CLK_LPUART1] = imx_clk_hw_gate2("lpuart1", "lpuart_podf", ccm_base + 0x7c, 24);
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hws[IMXRT1050_CLK_LCDIF_APB] = imx_clk_hw_gate2("lcdif", "lcdif_podf", ccm_base + 0x70, 28);
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hws[IMXRT1050_CLK_LCDIF_PIX] = imx_clk_hw_gate2("lcdif_pix", "lcdif", ccm_base + 0x74, 10);
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hws[IMXRT1050_CLK_DMA] = imx_clk_hw_gate("dma", "ipg", ccm_base + 0x7C, 6);
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hws[IMXRT1050_CLK_DMA_MUX] = imx_clk_hw_gate("dmamux0", "ipg", ccm_base + 0x7C, 7);
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imx_check_clk_hws(hws, IMXRT1050_CLK_END);
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ret = of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_hw_data);
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if (ret < 0) {
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dev_err(dev, "Failed to register clks for i.MXRT1050.\n");
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imx_unregister_hw_clocks(hws, IMXRT1050_CLK_END);
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}
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return ret;
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}
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static const struct of_device_id imxrt1050_clk_of_match[] = {
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{ .compatible = "fsl,imxrt1050-ccm" },
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{ /* Sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, imxrt1050_clk_of_match);
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static struct platform_driver imxrt1050_clk_driver = {
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.probe = imxrt1050_clocks_probe,
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.driver = {
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.name = "imxrt1050-ccm",
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.of_match_table = imxrt1050_clk_of_match,
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},
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};
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module_platform_driver(imxrt1050_clk_driver);
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MODULE_LICENSE("Dual BSD/GPL");
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MODULE_AUTHOR("Jesse Taube <Mr.Bossman075@gmail.com>");
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MODULE_AUTHOR("Giulio Benetti <giulio.benetti@benettiengineering.com>");
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