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serial: samsung: Keep a copy of the location of platform data in driver's private data

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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>
This commit is contained in:
Thomas Abraham
2011-10-24 11:47:25 +02:00
committed by Kukjin Kim
parent 659d73ada5
commit 4d84e970d0
3 changed files with 25 additions and 7 deletions
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4
drivers/tty/serial/samsung.h
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@@ -48,6 +48,9 @@ struct s3c24xx_uart_port {
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 @@ struct s3c24xx_uart_port {
/* 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 */