On Tue, Oct 22, 2013 at 01:58:36PM +0800, Peter Chen wrote:
> The mxs-phy has three versions until now, each versions have
> some differences among PHY operations. the 1st version is
> for mx23/mx28 SoC, The 2nd version is for mx6q and mx6dl, the
> 3rd version is for mx6sl and later mx6 platform.
>
> Signed-off-by: Peter Chen <peter.chen@xxxxxxxxxxxxx>
> ---
> drivers/usb/phy/phy-mxs-usb.c | 65 ++++++++++++++++++++++++++++++++++++-----
> 1 files changed, 57 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/usb/phy/phy-mxs-usb.c b/drivers/usb/phy/phy-mxs-usb.c
> index fdd33b4..a0628d6 100644
> --- a/drivers/usb/phy/phy-mxs-usb.c
> +++ b/drivers/usb/phy/phy-mxs-usb.c
> @@ -1,5 +1,5 @@
> /*
> - * Copyright 2012 Freescale Semiconductor, Inc.
> + * Copyright 2012-2013 Freescale Semiconductor, Inc.
> * Copyright (C) 2012 Marek Vasut <marex@xxxxxxx>
> * on behalf of DENX Software Engineering GmbH
> *
> @@ -20,6 +20,7 @@
> #include <linux/delay.h>
> #include <linux/err.h>
> #include <linux/io.h>
> +#include <linux/of_device.h>
>
> #define DRIVER_NAME "mxs_phy"
>
> @@ -34,12 +35,57 @@
> #define BM_USBPHY_CTRL_ENUTMILEVEL2 BIT(14)
> #define BM_USBPHY_CTRL_ENHOSTDISCONDETECT BIT(1)
>
> +#define to_mxs_phy(p) container_of((p), struct mxs_phy, phy)
> +
> +enum imx_phy_type {
> + IMX6Q_USB_PHY,
> + IMX6SL_USB_PHY,
> + IMX23_USB_PHY,
> +};
> +
> struct mxs_phy {
> struct usb_phy phy;
> struct clk *clk;
> + enum imx_phy_type devtype;
> };
>
> -#define to_mxs_phy(p) container_of((p), struct mxs_phy, phy)
> +static inline int is_mx6q_phy(struct mxs_phy *data)
> +{
> + return data->devtype == IMX6Q_USB_PHY;
> +}
> +
> +static inline int is_mx6sl_phy(struct mxs_phy *data)
> +{
> + return data->devtype == IMX6SL_USB_PHY;
> +}
> +
> +static inline int is_mx23_phy(struct mxs_phy *data)
> +{
> + return data->devtype == IMX23_USB_PHY;
> +}
> +
> +static struct platform_device_id imx_phy_devtype[] = {
> + {
> + .name = "usb-phy-imx6q",
> + .driver_data = IMX6Q_USB_PHY,
> + }, {
> + .name = "usb-phy-imx6sl",
> + .driver_data = IMX6SL_USB_PHY,
> + }, {
> + .name = "usb-phy-imx23",
> + .driver_data = IMX23_USB_PHY,
> + }, {
> + /* sentinel */
> + }
> +};
I know many imx device drivers have this platform_device_id table, but
that's because they need to support both non-DT and DT probe. Since
this driver supports DT probe only, we can save this table by passing
imx_phy_type value through of_device_id.data directly.
> +static const struct of_device_id mxs_phy_dt_ids[] = {
> + { .compatible = "fsl,imx6q-usbphy", .data = &imx_phy_devtype[IMX6Q_USB_PHY], },
> + { .compatible = "fsl,imx6sl-usbphy", .data = &imx_phy_devtype[IMX6SL_USB_PHY], },
> + { .compatible = "fsl,imx23-usbphy", .data = &imx_phy_devtype[IMX23_USB_PHY], },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, mxs_phy_dt_ids);
>
> static int mxs_phy_hw_init(struct mxs_phy *mxs_phy)
> {
> @@ -131,6 +177,14 @@ static int mxs_phy_probe(struct platform_device *pdev)
> struct clk *clk;
> struct mxs_phy *mxs_phy;
> int ret;
> + const struct of_device_id *of_id =
> + of_match_device(mxs_phy_dt_ids, &pdev->dev);
> +
> + /* This driver is DT-only version now */
> + if (!of_id)
> + return -ENXIO;
Since it's DT-only, I'm not sure you will run into the case that
mxs_phy_probe() is called with a NULL of_id. The check looks
unnecessary to me.
> +
> + pdev->id_entry = of_id->data;
Some imx device drivers did the same thing, but we should keep
pdev->id_entry immutable. The removal of that platform_device_id table
will help save this.
Shawn
>
> res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> base = devm_ioremap_resource(&pdev->dev, res);
> @@ -163,6 +217,7 @@ static int mxs_phy_probe(struct platform_device *pdev)
> ATOMIC_INIT_NOTIFIER_HEAD(&mxs_phy->phy.notifier);
>
> mxs_phy->clk = clk;
> + mxs_phy->devtype = pdev->id_entry->driver_data;
>
> platform_set_drvdata(pdev, &mxs_phy->phy);
>
> @@ -182,12 +237,6 @@ static int mxs_phy_remove(struct platform_device *pdev)
> return 0;
> }
>
> -static const struct of_device_id mxs_phy_dt_ids[] = {
> - { .compatible = "fsl,imx23-usbphy", },
> - { /* sentinel */ }
> -};
> -MODULE_DEVICE_TABLE(of, mxs_phy_dt_ids);
> -
> static struct platform_driver mxs_phy_driver = {
> .probe = mxs_phy_probe,
> .remove = mxs_phy_remove,
> --
> 1.7.1
>
>
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