mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-16 16:54:20 +08:00
f0ed817638
In case of multi-phy PHY providers, each PHY should be modeled as a sub node of the PHY provider. Then each PHY will have a different node pointer (node pointer of sub node) than that of PHY provider. Added this provision in the PHY core. Also fixed all drivers to use the updated API. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Acked-by: Lee Jones <lee.jones@linaro.org>
111 lines
2.7 KiB
C
111 lines
2.7 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/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/phy/phy.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
/* DPTX_PHY_CONTROL register */
|
|
#define EXYNOS_DPTX_PHY_ENABLE (1 << 0)
|
|
|
|
struct exynos_dp_video_phy {
|
|
void __iomem *regs;
|
|
};
|
|
|
|
static int __set_phy_state(struct exynos_dp_video_phy *state, unsigned int on)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = readl(state->regs);
|
|
if (on)
|
|
reg |= EXYNOS_DPTX_PHY_ENABLE;
|
|
else
|
|
reg &= ~EXYNOS_DPTX_PHY_ENABLE;
|
|
writel(reg, state->regs);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int exynos_dp_video_phy_power_on(struct phy *phy)
|
|
{
|
|
struct exynos_dp_video_phy *state = phy_get_drvdata(phy);
|
|
|
|
return __set_phy_state(state, 1);
|
|
}
|
|
|
|
static int exynos_dp_video_phy_power_off(struct phy *phy)
|
|
{
|
|
struct exynos_dp_video_phy *state = phy_get_drvdata(phy);
|
|
|
|
return __set_phy_state(state, 0);
|
|
}
|
|
|
|
static 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 int exynos_dp_video_phy_probe(struct platform_device *pdev)
|
|
{
|
|
struct exynos_dp_video_phy *state;
|
|
struct device *dev = &pdev->dev;
|
|
struct resource *res;
|
|
struct phy_provider *phy_provider;
|
|
struct phy *phy;
|
|
|
|
state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL);
|
|
if (!state)
|
|
return -ENOMEM;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
|
|
state->regs = devm_ioremap_resource(dev, res);
|
|
if (IS_ERR(state->regs))
|
|
return PTR_ERR(state->regs);
|
|
|
|
phy = devm_phy_create(dev, NULL, &exynos_dp_video_phy_ops, NULL);
|
|
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 const struct of_device_id exynos_dp_video_phy_of_match[] = {
|
|
{ .compatible = "samsung,exynos5250-dp-video-phy" },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, exynos_dp_video_phy_of_match);
|
|
|
|
static struct platform_driver exynos_dp_video_phy_driver = {
|
|
.probe = exynos_dp_video_phy_probe,
|
|
.driver = {
|
|
.name = "exynos-dp-video-phy",
|
|
.owner = THIS_MODULE,
|
|
.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");
|