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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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dea7b202bd
Fix up inconsistent usage of upper and lowercase letters in "Samsung" and "Exynos" names. "SAMSUNG" and "EXYNOS" are not abbreviations but regular trademarked names. Therefore they should be written with lowercase letters starting with capital letter. The lowercase "Exynos" name is promoted by its manufacturer Samsung Electronics Co., Ltd., in advertisement materials and on website. Although advertisement materials usually use uppercase "SAMSUNG", the lowercase version is used in all legal aspects (e.g. on Wikipedia and in privacy/legal statements on https://www.samsung.com/semiconductor/privacy-global/). Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Link: https://lore.kernel.org/r/20200104152107.11407-9-krzk@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
259 lines
5.9 KiB
C
259 lines
5.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/**
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* dwc3-exynos.c - Samsung Exynos DWC3 Specific Glue layer
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*
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* Copyright (c) 2012 Samsung Electronics Co., Ltd.
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* http://www.samsung.com
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*
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* Author: Anton Tikhomirov <av.tikhomirov@samsung.com>
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/regulator/consumer.h>
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#define DWC3_EXYNOS_MAX_CLOCKS 4
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struct dwc3_exynos_driverdata {
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const char *clk_names[DWC3_EXYNOS_MAX_CLOCKS];
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int num_clks;
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int suspend_clk_idx;
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};
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struct dwc3_exynos {
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struct device *dev;
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const char **clk_names;
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struct clk *clks[DWC3_EXYNOS_MAX_CLOCKS];
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int num_clks;
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int suspend_clk_idx;
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struct regulator *vdd33;
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struct regulator *vdd10;
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};
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static int dwc3_exynos_remove_child(struct device *dev, void *unused)
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{
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struct platform_device *pdev = to_platform_device(dev);
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platform_device_unregister(pdev);
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return 0;
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}
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static int dwc3_exynos_probe(struct platform_device *pdev)
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{
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struct dwc3_exynos *exynos;
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struct device *dev = &pdev->dev;
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struct device_node *node = dev->of_node;
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const struct dwc3_exynos_driverdata *driver_data;
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int i, ret;
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exynos = devm_kzalloc(dev, sizeof(*exynos), GFP_KERNEL);
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if (!exynos)
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return -ENOMEM;
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driver_data = of_device_get_match_data(dev);
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exynos->dev = dev;
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exynos->num_clks = driver_data->num_clks;
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exynos->clk_names = (const char **)driver_data->clk_names;
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exynos->suspend_clk_idx = driver_data->suspend_clk_idx;
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platform_set_drvdata(pdev, exynos);
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for (i = 0; i < exynos->num_clks; i++) {
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exynos->clks[i] = devm_clk_get(dev, exynos->clk_names[i]);
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if (IS_ERR(exynos->clks[i])) {
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dev_err(dev, "failed to get clock: %s\n",
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exynos->clk_names[i]);
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return PTR_ERR(exynos->clks[i]);
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}
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}
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for (i = 0; i < exynos->num_clks; i++) {
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ret = clk_prepare_enable(exynos->clks[i]);
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if (ret) {
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while (i-- > 0)
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clk_disable_unprepare(exynos->clks[i]);
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return ret;
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}
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}
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if (exynos->suspend_clk_idx >= 0)
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clk_prepare_enable(exynos->clks[exynos->suspend_clk_idx]);
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exynos->vdd33 = devm_regulator_get(dev, "vdd33");
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if (IS_ERR(exynos->vdd33)) {
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ret = PTR_ERR(exynos->vdd33);
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goto vdd33_err;
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}
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ret = regulator_enable(exynos->vdd33);
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if (ret) {
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dev_err(dev, "Failed to enable VDD33 supply\n");
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goto vdd33_err;
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}
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exynos->vdd10 = devm_regulator_get(dev, "vdd10");
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if (IS_ERR(exynos->vdd10)) {
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ret = PTR_ERR(exynos->vdd10);
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goto vdd10_err;
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}
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ret = regulator_enable(exynos->vdd10);
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if (ret) {
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dev_err(dev, "Failed to enable VDD10 supply\n");
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goto vdd10_err;
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}
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if (node) {
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ret = of_platform_populate(node, NULL, NULL, dev);
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if (ret) {
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dev_err(dev, "failed to add dwc3 core\n");
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goto populate_err;
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}
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} else {
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dev_err(dev, "no device node, failed to add dwc3 core\n");
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ret = -ENODEV;
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goto populate_err;
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}
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return 0;
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populate_err:
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regulator_disable(exynos->vdd10);
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vdd10_err:
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regulator_disable(exynos->vdd33);
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vdd33_err:
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for (i = exynos->num_clks - 1; i >= 0; i--)
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clk_disable_unprepare(exynos->clks[i]);
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if (exynos->suspend_clk_idx >= 0)
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clk_disable_unprepare(exynos->clks[exynos->suspend_clk_idx]);
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return ret;
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}
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static int dwc3_exynos_remove(struct platform_device *pdev)
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{
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struct dwc3_exynos *exynos = platform_get_drvdata(pdev);
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int i;
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device_for_each_child(&pdev->dev, NULL, dwc3_exynos_remove_child);
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for (i = exynos->num_clks - 1; i >= 0; i--)
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clk_disable_unprepare(exynos->clks[i]);
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if (exynos->suspend_clk_idx >= 0)
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clk_disable_unprepare(exynos->clks[exynos->suspend_clk_idx]);
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regulator_disable(exynos->vdd33);
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regulator_disable(exynos->vdd10);
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return 0;
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}
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static const struct dwc3_exynos_driverdata exynos5250_drvdata = {
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.clk_names = { "usbdrd30" },
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.num_clks = 1,
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.suspend_clk_idx = -1,
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};
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static const struct dwc3_exynos_driverdata exynos5433_drvdata = {
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.clk_names = { "aclk", "susp_clk", "pipe_pclk", "phyclk" },
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.num_clks = 4,
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.suspend_clk_idx = 1,
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};
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static const struct dwc3_exynos_driverdata exynos7_drvdata = {
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.clk_names = { "usbdrd30", "usbdrd30_susp_clk", "usbdrd30_axius_clk" },
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.num_clks = 3,
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.suspend_clk_idx = 1,
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};
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static const struct of_device_id exynos_dwc3_match[] = {
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{
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.compatible = "samsung,exynos5250-dwusb3",
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.data = &exynos5250_drvdata,
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}, {
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.compatible = "samsung,exynos5433-dwusb3",
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.data = &exynos5433_drvdata,
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}, {
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.compatible = "samsung,exynos7-dwusb3",
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.data = &exynos7_drvdata,
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}, {
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}
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};
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MODULE_DEVICE_TABLE(of, exynos_dwc3_match);
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#ifdef CONFIG_PM_SLEEP
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static int dwc3_exynos_suspend(struct device *dev)
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{
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struct dwc3_exynos *exynos = dev_get_drvdata(dev);
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int i;
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for (i = exynos->num_clks - 1; i >= 0; i--)
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clk_disable_unprepare(exynos->clks[i]);
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regulator_disable(exynos->vdd33);
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regulator_disable(exynos->vdd10);
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return 0;
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}
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static int dwc3_exynos_resume(struct device *dev)
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{
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struct dwc3_exynos *exynos = dev_get_drvdata(dev);
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int i, ret;
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ret = regulator_enable(exynos->vdd33);
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if (ret) {
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dev_err(dev, "Failed to enable VDD33 supply\n");
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return ret;
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}
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ret = regulator_enable(exynos->vdd10);
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if (ret) {
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dev_err(dev, "Failed to enable VDD10 supply\n");
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return ret;
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}
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for (i = 0; i < exynos->num_clks; i++) {
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ret = clk_prepare_enable(exynos->clks[i]);
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if (ret) {
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while (i-- > 0)
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clk_disable_unprepare(exynos->clks[i]);
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return ret;
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}
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}
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return 0;
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}
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static const struct dev_pm_ops dwc3_exynos_dev_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(dwc3_exynos_suspend, dwc3_exynos_resume)
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};
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#define DEV_PM_OPS (&dwc3_exynos_dev_pm_ops)
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#else
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#define DEV_PM_OPS NULL
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#endif /* CONFIG_PM_SLEEP */
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static struct platform_driver dwc3_exynos_driver = {
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.probe = dwc3_exynos_probe,
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.remove = dwc3_exynos_remove,
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.driver = {
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.name = "exynos-dwc3",
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.of_match_table = exynos_dwc3_match,
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.pm = DEV_PM_OPS,
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},
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};
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module_platform_driver(dwc3_exynos_driver);
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MODULE_AUTHOR("Anton Tikhomirov <av.tikhomirov@samsung.com>");
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("DesignWare USB3 Exynos Glue Layer");
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