On Mon, Jan 02, 2012 at 11:24:35AM +0530, Thomas Abraham wrote:
> Add device tree based initialization for Hydis hv070wsa lcd panel.
>
> Cc: Ben Dooks <ben-linux@xxxxxxxxx>
> Signed-off-by: Thomas Abraham <thomas.abraham@xxxxxxxxxx>
> ---
> drivers/video/backlight/platform_lcd.c | 33 ++++++++++++++++++++++++++++++++
> 1 files changed, 33 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/video/backlight/platform_lcd.c b/drivers/video/backlight/platform_lcd.c
> index feb4fd0..ebdddfd 100644
> --- a/drivers/video/backlight/platform_lcd.c
> +++ b/drivers/video/backlight/platform_lcd.c
> @@ -18,6 +18,8 @@
> #include <linux/lcd.h>
> #include <linux/slab.h>
> #include <linux/gpio.h>
> +#include <linux/of.h>
> +#include <linux/of_gpio.h>
>
> #include <video/platform_lcd.h>
>
> @@ -81,9 +83,18 @@ static struct lcd_ops platform_lcd_ops = {
> .check_fb = platform_lcd_match,
> };
>
> +static const struct of_device_id platform_lcd_dt_match[];
> +
> static inline struct plat_lcd_driver_data *platform_lcd_get_driver_data(
> struct platform_device *pdev)
> {
> +#ifdef CONFIG_OF
> + if (pdev->dev.of_node) {
> + const struct of_device_id *match;
> + match = of_match_node(platform_lcd_dt_match, pdev->dev.of_node);
> + return (struct plat_lcd_driver_data *)match->data;
.data is already void*; the cast should not be necessary.
> + }
> +#endif
> return (struct plat_lcd_driver_data *)
> platform_get_device_id(pdev)->driver_data;
> }
> @@ -167,6 +178,19 @@ static int lcd_hv070wsa_init(struct platform_lcd *plcd)
> struct plat_lcd_hydis_hv070wsa_pdata *pdata = plcd->lcd_pdata;
> int err;
>
> +#ifdef CONFIG_OF
> + if (of_have_populated_dt()) {
> + plcd->lcd_pdata = devm_kzalloc(plcd->us,
> + sizeof(*pdata), GFP_KERNEL);
> + if (!plcd->lcd_pdata) {
> + dev_err(plcd->us, "mem alloc for pdata failed\n");
> + return -ENOMEM;
> + }
> + pdata = plcd->lcd_pdata;
> + pdata->gpio = of_get_gpio(plcd->us->of_node, 0);
> + }
> +#endif
> +
> if (!pdata) {
> dev_err(plcd->us, "no platform data\n");
> return -EINVAL;
> @@ -214,10 +238,19 @@ static struct platform_device_id platform_lcd_driver_ids[] = {
> };
> MODULE_DEVICE_TABLE(platform, platform_lcd_driver_ids);
>
> +#ifdef CONFIG_OF
> +static const struct of_device_id platform_lcd_dt_match[] = {
> + { .compatible = "hydis,hv070wsa", .data = (void *)HV070WSA_DRV_DATA},
> + {},
> +};
> +MODULE_DEVICE_TABLE(of, platform_lcd_dt_match);
> +#endif
> +
> static struct platform_driver platform_lcd_driver = {
> .driver = {
> .name = "platform-lcd",
> .owner = THIS_MODULE,
> + .of_match_table = of_match_ptr(platform_lcd_dt_match),
> },
> .probe = platform_lcd_probe,
> .remove = __devexit_p(platform_lcd_remove),
> --
> 1.6.6.rc2
>
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