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c233a2edf8
Fix up inconsistent usage of upper and lowercase letters in "Exynos" name. "EXYNOS" is not an abbreviation but a regular trademarked name. Therefore it 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. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Link: https://lore.kernel.org/r/20200617152803.17941-1-krzk@kernel.org Signed-off-by: Vinod Koul <vkoul@kernel.org>
119 lines
3.2 KiB
C
119 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Samsung Exynos SoC series Display Port PHY driver
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*
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* Copyright (C) 2013 Samsung Electronics Co., Ltd.
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* Author: Jingoo Han <jg1.han@samsung.com>
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*/
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mfd/syscon.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_device.h>
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#include <linux/phy/phy.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/soc/samsung/exynos-regs-pmu.h>
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struct exynos_dp_video_phy_drvdata {
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u32 phy_ctrl_offset;
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};
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struct exynos_dp_video_phy {
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struct regmap *regs;
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const struct exynos_dp_video_phy_drvdata *drvdata;
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};
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static int exynos_dp_video_phy_power_on(struct phy *phy)
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{
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struct exynos_dp_video_phy *state = phy_get_drvdata(phy);
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/* Disable power isolation on DP-PHY */
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return regmap_update_bits(state->regs, state->drvdata->phy_ctrl_offset,
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EXYNOS4_PHY_ENABLE, EXYNOS4_PHY_ENABLE);
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}
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static int exynos_dp_video_phy_power_off(struct phy *phy)
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{
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struct exynos_dp_video_phy *state = phy_get_drvdata(phy);
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/* Enable power isolation on DP-PHY */
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return regmap_update_bits(state->regs, state->drvdata->phy_ctrl_offset,
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EXYNOS4_PHY_ENABLE, 0);
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}
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static const struct phy_ops exynos_dp_video_phy_ops = {
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.power_on = exynos_dp_video_phy_power_on,
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.power_off = exynos_dp_video_phy_power_off,
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.owner = THIS_MODULE,
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};
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static const struct exynos_dp_video_phy_drvdata exynos5250_dp_video_phy = {
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.phy_ctrl_offset = EXYNOS5_DPTX_PHY_CONTROL,
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};
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static const struct exynos_dp_video_phy_drvdata exynos5420_dp_video_phy = {
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.phy_ctrl_offset = EXYNOS5420_DPTX_PHY_CONTROL,
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};
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static const struct of_device_id exynos_dp_video_phy_of_match[] = {
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{
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.compatible = "samsung,exynos5250-dp-video-phy",
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.data = &exynos5250_dp_video_phy,
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}, {
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.compatible = "samsung,exynos5420-dp-video-phy",
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.data = &exynos5420_dp_video_phy,
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},
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{ },
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};
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MODULE_DEVICE_TABLE(of, exynos_dp_video_phy_of_match);
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static int exynos_dp_video_phy_probe(struct platform_device *pdev)
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{
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struct exynos_dp_video_phy *state;
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struct device *dev = &pdev->dev;
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struct phy_provider *phy_provider;
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struct phy *phy;
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state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL);
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if (!state)
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return -ENOMEM;
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state->regs = syscon_regmap_lookup_by_phandle(dev->of_node,
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"samsung,pmu-syscon");
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if (IS_ERR(state->regs)) {
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dev_err(dev, "Failed to lookup PMU regmap\n");
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return PTR_ERR(state->regs);
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}
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state->drvdata = of_device_get_match_data(dev);
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phy = devm_phy_create(dev, NULL, &exynos_dp_video_phy_ops);
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if (IS_ERR(phy)) {
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dev_err(dev, "failed to create Display Port PHY\n");
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return PTR_ERR(phy);
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}
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phy_set_drvdata(phy, state);
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phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
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return PTR_ERR_OR_ZERO(phy_provider);
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}
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static struct platform_driver exynos_dp_video_phy_driver = {
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.probe = exynos_dp_video_phy_probe,
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.driver = {
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.name = "exynos-dp-video-phy",
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.of_match_table = exynos_dp_video_phy_of_match,
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.suppress_bind_attrs = true,
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}
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};
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module_platform_driver(exynos_dp_video_phy_driver);
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MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
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MODULE_DESCRIPTION("Samsung Exynos SoC DP PHY driver");
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MODULE_LICENSE("GPL v2");
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