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;
+ }
+#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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