serial: samsung: Keep a copy of the location of platform data in driver's private data
Add a pointer to the location of the platform data in the driver's private
data. When instantiated using device tree, pdev->dev->platform_data does not
necessarily point to a valid instance of platform data. The platform data
pointer in the driver's private data could be set to pdev->dev->platform_data
or platform data instance created from device tree.
Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/drivers/tty/serial/samsung.h b/drivers/tty/serial/samsung.h
index 8e87b78..6c9cb9d 100644
--- a/drivers/tty/serial/samsung.h
+++ b/drivers/tty/serial/samsung.h
@@ -48,6 +48,9 @@
struct clk *baudclk;
struct uart_port port;
+ /* reference to platform data */
+ struct s3c2410_uartcfg *cfg;
+
#ifdef CONFIG_CPU_FREQ
struct notifier_block freq_transition;
#endif
@@ -56,7 +59,6 @@
/* conversion functions */
#define s3c24xx_dev_to_port(__dev) (struct uart_port *)dev_get_drvdata(__dev)
-#define s3c24xx_dev_to_cfg(__dev) (struct s3c2410_uartcfg *)((__dev)->platform_data)
/* register access controls */