[PATCH V3 3/3] video: exynos_dp: Use the generic PHY driver

Jingoo Han
2013-07-01T05:24:54Z

Use the generic PHY API instead of the platform callback to control
the DP PHY. The 'phy_label' field is added to the platform data
structure to allow PHY lookup on non-dt platforms.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Felipe Balbi <balbi@ti.com>
---
.../devicetree/bindings/video/exynos_dp.txt | 23 +---
drivers/video/exynos/exynos_dp_core.c | 118 ++------------------
drivers/video/exynos/exynos_dp_core.h | 2 +
include/video/exynos_dp.h | 6 +-
4 files changed, 21 insertions(+), 128 deletions(-)

diff --git a/Documentation/devicetree/bindings/video/exynos_dp.txt b/Documentation/devicetree/bindings/video/exynos_dp.txt
index 84f10c1..71645dc 100644
--- a/Documentation/devicetree/bindings/video/exynos_dp.txt
+++ b/Documentation/devicetree/bindings/video/exynos_dp.txt
@@ -1,17 +1,6 @@
The Exynos display port interface should be configured based on
the type of panel connected to it.

-We use two nodes:
- -dp-controller node
- -dptx-phy node(defined inside dp-controller node)
-
-For the DP-PHY initialization, we use the dptx-phy node.
-Required properties for dptx-phy:
- -reg:
- Base address of DP PHY register.
- -samsung,enable-mask:
- The bit-mask used to enable/disable DP PHY.
-
For the Panel initialization, we read data from dp-controller node.
Required properties for dp-controller:
-compatible:
@@ -25,6 +14,10 @@ Required properties for dp-controller:
from common clock binding: handle to dp clock.
-clock-names:
from common clock binding: Shall be "dp".
+ -phys:
+ from general phy binding: the phandle for the PHY device.
+ -phy-names:
+ from general phy binding: Should be "dp".
-interrupt-parent:
phandle to Interrupt combiner node.
-samsung,color-space:
@@ -67,12 +60,8 @@ SOC specific portion:
interrupt-parent = <&combiner>;
clocks = <&clock 342>;
clock-names = "dp";
-
- dptx-phy {
- reg = <0x10040720>;
- samsung,enable-mask = <1>;
- };
-
+ phys = <&dp_phy>;
+ phy-names = "dp";
};

Board Specific portion:
diff --git a/drivers/video/exynos/exynos_dp_core.c b/drivers/video/exynos/exynos_dp_core.c
index 12bbede..bac515b 100644
--- a/drivers/video/exynos/exynos_dp_core.c
+++ b/drivers/video/exynos/exynos_dp_core.c
@@ -19,6 +19,7 @@
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/of.h>
+#include <linux/phy/phy.h>

#include <video/exynos_dp.h>

@@ -960,84 +961,15 @@ static struct exynos_dp_platdata *exynos_dp_dt_parse_pdata(struct device *dev)
return ERR_PTR(-EINVAL);
}

- return pd;
-}
-
-static int exynos_dp_dt_parse_phydata(struct exynos_dp_device *dp)
-{
- struct device_node *dp_phy_node = of_node_get(dp->dev->of_node);
- u32 phy_base;
- int ret = 0;
-
- dp_phy_node = of_find_node_by_name(dp_phy_node, "dptx-phy");
- if (!dp_phy_node) {
- dev_err(dp->dev, "could not find dptx-phy node\n");
- return -ENODEV;
- }
-
- if (of_property_read_u32(dp_phy_node, "reg", &phy_base)) {
- dev_err(dp->dev, "failed to get reg for dptx-phy\n");
- ret = -EINVAL;
- goto err;
- }
-
- if (of_property_read_u32(dp_phy_node, "samsung,enable-mask",
- &dp->enable_mask)) {
- dev_err(dp->dev, "failed to get enable-mask for dptx-phy\n");
- ret = -EINVAL;
- goto err;
- }
-
- dp->phy_addr = ioremap(phy_base, SZ_4);
- if (!dp->phy_addr) {
- dev_err(dp->dev, "failed to ioremap dp-phy\n");
- ret = -ENOMEM;
- goto err;
- }
-
-err:
- of_node_put(dp_phy_node);
-
- return ret;
-}
-
-static void exynos_dp_phy_init(struct exynos_dp_device *dp)
-{
- u32 reg;
-
- reg = __raw_readl(dp->phy_addr);
- reg |= dp->enable_mask;
- __raw_writel(reg, dp->phy_addr);
-}
-
-static void exynos_dp_phy_exit(struct exynos_dp_device *dp)
-{
- u32 reg;
+ pd->phy_label = "dp";

- reg = __raw_readl(dp->phy_addr);
- reg &= ~(dp->enable_mask);
- __raw_writel(reg, dp->phy_addr);
+ return pd;
}
#else
static struct exynos_dp_platdata *exynos_dp_dt_parse_pdata(struct device *dev)
{
return NULL;
}
-
-static int exynos_dp_dt_parse_phydata(struct exynos_dp_device *dp)
-{
- return -EINVAL;
-}
-
-static void exynos_dp_phy_init(struct exynos_dp_device *dp)
-{
- return;
-}
-
-static void exynos_dp_phy_exit(struct exynos_dp_device *dp)
-{
- return;
-}
#endif /* CONFIG_OF */

static int exynos_dp_probe(struct platform_device *pdev)
@@ -1061,10 +993,6 @@ static int exynos_dp_probe(struct platform_device *pdev)
pdata = exynos_dp_dt_parse_pdata(&pdev->dev);
if (IS_ERR(pdata))
return PTR_ERR(pdata);
-
- ret = exynos_dp_dt_parse_phydata(dp);
- if (ret)
- return ret;
} else {
pdata = pdev->dev.platform_data;
if (!pdata) {
@@ -1073,6 +1001,10 @@ static int exynos_dp_probe(struct platform_device *pdev)
}
}

+ dp->phy = devm_phy_get(&pdev->dev, pdata->phy_label);
+ if (IS_ERR(dp->phy))
+ return PTR_ERR(dp->phy);
+
dp->clock = devm_clk_get(&pdev->dev, "dp");
if (IS_ERR(dp->clock)) {
dev_err(&pdev->dev, "failed to get clock\n");
@@ -1097,13 +1029,7 @@ static int exynos_dp_probe(struct platform_device *pdev)

dp->video_info = pdata->video_info;

- if (pdev->dev.of_node) {
- if (dp->phy_addr)
- exynos_dp_phy_init(dp);
- } else {
- if (pdata->phy_init)
- pdata->phy_init();
- }
+ phy_power_on(dp->phy);

exynos_dp_init_dp(dp);

@@ -1121,42 +1047,27 @@ static int exynos_dp_probe(struct platform_device *pdev)

static int exynos_dp_remove(struct platform_device *pdev)
{
- struct exynos_dp_platdata *pdata = pdev->dev.platform_data;
struct exynos_dp_device *dp = platform_get_drvdata(pdev);

flush_work(&dp->hotplug_work);

- if (pdev->dev.of_node) {
- if (dp->phy_addr)
- exynos_dp_phy_exit(dp);
- } else {
- if (pdata->phy_exit)
- pdata->phy_exit();
- }
+ phy_power_off(dp->phy);

clk_disable_unprepare(dp->clock);

-
return 0;
}

#ifdef CONFIG_PM_SLEEP
static int exynos_dp_suspend(struct device *dev)
{
- struct exynos_dp_platdata *pdata = dev->platform_data;
struct exynos_dp_device *dp = dev_get_drvdata(dev);

disable_irq(dp->irq);

flush_work(&dp->hotplug_work);

- if (dev->of_node) {
- if (dp->phy_addr)
- exynos_dp_phy_exit(dp);
- } else {
- if (pdata->phy_exit)
- pdata->phy_exit();
- }
+ phy_power_off(dp->phy);

clk_disable_unprepare(dp->clock);

@@ -1165,16 +1076,9 @@ static int exynos_dp_suspend(struct device *dev)

static int exynos_dp_resume(struct device *dev)
{
- struct exynos_dp_platdata *pdata = dev->platform_data;
struct exynos_dp_device *dp = dev_get_drvdata(dev);

- if (dev->of_node) {
- if (dp->phy_addr)
- exynos_dp_phy_init(dp);
- } else {
- if (pdata->phy_init)
- pdata->phy_init();
- }
+ phy_power_on(dp->phy);

clk_prepare_enable(dp->clock);

diff --git a/drivers/video/exynos/exynos_dp_core.h b/drivers/video/exynos/exynos_dp_core.h
index 6c567bbf..b3d0328 100644
--- a/drivers/video/exynos/exynos_dp_core.h
+++ b/drivers/video/exynos/exynos_dp_core.h
@@ -42,6 +42,8 @@ struct exynos_dp_device {
struct video_info *video_info;
struct link_train link_train;
struct work_struct hotplug_work;
+
+ struct phy *phy;
};

/* exynos_dp_reg.c */
diff --git a/include/video/exynos_dp.h b/include/video/exynos_dp.h
index bd8cabd..f38c9af 100644
--- a/include/video/exynos_dp.h
+++ b/include/video/exynos_dp.h
@@ -122,10 +122,8 @@ struct video_info {
};

struct exynos_dp_platdata {
- struct video_info *video_info;
-
- void (*phy_init)(void);
- void (*phy_exit)(void);
+ struct video_info *video_info;
+ const char *phy_label;
};

#endif /* _EXYNOS_DP_H */
--
1.7.10.4