7a66647b25
There is no need for separate defines for Exynos4 and Exynos5 phy enable bit and MIPI phy reset bits. In both cases there are the same so simplify it. This reduces number of defines and allows removal of one header file. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Lee Jones <lee.jones@linaro.org> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
123 lines
3.4 KiB
C
123 lines
3.4 KiB
C
/*
|
|
* Samsung EXYNOS SoC series Display Port PHY driver
|
|
*
|
|
* Copyright (C) 2013 Samsung Electronics Co., Ltd.
|
|
* Author: Jingoo Han <jg1.han@samsung.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/io.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mfd/syscon.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/phy/phy.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/soc/samsung/exynos-regs-pmu.h>
|
|
|
|
struct exynos_dp_video_phy_drvdata {
|
|
u32 phy_ctrl_offset;
|
|
};
|
|
|
|
struct exynos_dp_video_phy {
|
|
struct regmap *regs;
|
|
const struct exynos_dp_video_phy_drvdata *drvdata;
|
|
};
|
|
|
|
static int exynos_dp_video_phy_power_on(struct phy *phy)
|
|
{
|
|
struct exynos_dp_video_phy *state = phy_get_drvdata(phy);
|
|
|
|
/* Disable power isolation on DP-PHY */
|
|
return regmap_update_bits(state->regs, state->drvdata->phy_ctrl_offset,
|
|
EXYNOS4_PHY_ENABLE, EXYNOS4_PHY_ENABLE);
|
|
}
|
|
|
|
static int exynos_dp_video_phy_power_off(struct phy *phy)
|
|
{
|
|
struct exynos_dp_video_phy *state = phy_get_drvdata(phy);
|
|
|
|
/* Enable power isolation on DP-PHY */
|
|
return regmap_update_bits(state->regs, state->drvdata->phy_ctrl_offset,
|
|
EXYNOS4_PHY_ENABLE, 0);
|
|
}
|
|
|
|
static const struct phy_ops exynos_dp_video_phy_ops = {
|
|
.power_on = exynos_dp_video_phy_power_on,
|
|
.power_off = exynos_dp_video_phy_power_off,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static const struct exynos_dp_video_phy_drvdata exynos5250_dp_video_phy = {
|
|
.phy_ctrl_offset = EXYNOS5_DPTX_PHY_CONTROL,
|
|
};
|
|
|
|
static const struct exynos_dp_video_phy_drvdata exynos5420_dp_video_phy = {
|
|
.phy_ctrl_offset = EXYNOS5420_DPTX_PHY_CONTROL,
|
|
};
|
|
|
|
static const struct of_device_id exynos_dp_video_phy_of_match[] = {
|
|
{
|
|
.compatible = "samsung,exynos5250-dp-video-phy",
|
|
.data = &exynos5250_dp_video_phy,
|
|
}, {
|
|
.compatible = "samsung,exynos5420-dp-video-phy",
|
|
.data = &exynos5420_dp_video_phy,
|
|
},
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, exynos_dp_video_phy_of_match);
|
|
|
|
static int exynos_dp_video_phy_probe(struct platform_device *pdev)
|
|
{
|
|
struct exynos_dp_video_phy *state;
|
|
struct device *dev = &pdev->dev;
|
|
const struct of_device_id *match;
|
|
struct phy_provider *phy_provider;
|
|
struct phy *phy;
|
|
|
|
state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL);
|
|
if (!state)
|
|
return -ENOMEM;
|
|
|
|
state->regs = syscon_regmap_lookup_by_phandle(dev->of_node,
|
|
"samsung,pmu-syscon");
|
|
if (IS_ERR(state->regs)) {
|
|
dev_err(dev, "Failed to lookup PMU regmap\n");
|
|
return PTR_ERR(state->regs);
|
|
}
|
|
|
|
match = of_match_node(exynos_dp_video_phy_of_match, dev->of_node);
|
|
state->drvdata = match->data;
|
|
|
|
phy = devm_phy_create(dev, NULL, &exynos_dp_video_phy_ops);
|
|
if (IS_ERR(phy)) {
|
|
dev_err(dev, "failed to create Display Port PHY\n");
|
|
return PTR_ERR(phy);
|
|
}
|
|
phy_set_drvdata(phy, state);
|
|
|
|
phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
|
|
|
|
return PTR_ERR_OR_ZERO(phy_provider);
|
|
}
|
|
|
|
static struct platform_driver exynos_dp_video_phy_driver = {
|
|
.probe = exynos_dp_video_phy_probe,
|
|
.driver = {
|
|
.name = "exynos-dp-video-phy",
|
|
.of_match_table = exynos_dp_video_phy_of_match,
|
|
}
|
|
};
|
|
module_platform_driver(exynos_dp_video_phy_driver);
|
|
|
|
MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>");
|
|
MODULE_DESCRIPTION("Samsung EXYNOS SoC DP PHY driver");
|
|
MODULE_LICENSE("GPL v2");
|