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

Kishon Vijay Abraham I
2013-07-01T06:28:26Z

Hi,

On Monday 01 July 2013 10:54 AM, Jingoo Han wrote:
> 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";

Felipe had a comment to change the label to *display-port* no?

Thanks
Kishon