diff options
| author | Thomas Abraham <thomas.abraham@linaro.org> | 2011-11-06 17:40:44 +0100 |
|---|---|---|
| committer | Kukjin Kim <kgene.kim@samsung.com> | 2011-12-23 02:07:01 +0100 |
| commit | 26c919e1d3f4dff87ad50e104670f048cbc69b17 (patch) | |
| tree | 7ad7222cb616409257e414b403e9b5ea2c488a07 /drivers/tty | |
| parent | serial: samsung: merge probe() function from all SoC specific extensions (diff) | |
| download | linux-26c919e1d3f4dff87ad50e104670f048cbc69b17.tar.xz linux-26c919e1d3f4dff87ad50e104670f048cbc69b17.zip | |
serial: samsung: add device tree support
Add device tree based discovery support for Samsung's uart controller.
Cc: Ben Dooks <ben-linux@fluff.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/samsung.c | 36 |
1 files changed, 34 insertions, 2 deletions
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index c89987b64c15..efe3756b53f9 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -42,6 +42,7 @@ #include <linux/delay.h> #include <linux/clk.h> #include <linux/cpufreq.h> +#include <linux/of.h> #include <asm/irq.h> @@ -1163,10 +1164,26 @@ static ssize_t s3c24xx_serial_show_clksrc(struct device *dev, static DEVICE_ATTR(clock_source, S_IRUGO, s3c24xx_serial_show_clksrc, NULL); + /* Device driver serial port probe */ +static const struct of_device_id s3c24xx_uart_dt_match[]; static int probe_index; +static inline struct s3c24xx_serial_drv_data *s3c24xx_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(s3c24xx_uart_dt_match, pdev->dev.of_node); + return (struct s3c24xx_serial_drv_data *)match->data; + } +#endif + return (struct s3c24xx_serial_drv_data *) + platform_get_device_id(pdev)->driver_data; +} + static int s3c24xx_serial_probe(struct platform_device *pdev) { struct s3c24xx_uart_port *ourport; @@ -1176,8 +1193,11 @@ static int s3c24xx_serial_probe(struct platform_device *pdev) ourport = &s3c24xx_serial_ports[probe_index]; - ourport->drv_data = (struct s3c24xx_serial_drv_data *) - platform_get_device_id(pdev)->driver_data; + ourport->drv_data = s3c24xx_get_driver_data(pdev); + if (!ourport->drv_data) { + dev_err(&pdev->dev, "could not find driver data\n"); + return -ENODEV; + } ourport->info = ourport->drv_data->info; ourport->cfg = (pdev->dev.platform_data) ? @@ -1626,6 +1646,17 @@ static struct platform_device_id s3c24xx_serial_driver_ids[] = { }; MODULE_DEVICE_TABLE(platform, s3c24xx_serial_driver_ids); +#ifdef CONFIG_OF +static const struct of_device_id s3c24xx_uart_dt_match[] = { + { .compatible = "samsung,exynos4210-uart", + .data = &exynos4210_serial_drv_data }, + {}, +}; +MODULE_DEVICE_TABLE(of, s3c24xx_uart_dt_match); +#else +#define s3c24xx_uart_dt_match NULL +#endif + static struct platform_driver samsung_serial_driver = { .probe = s3c24xx_serial_probe, .remove = __devexit_p(s3c24xx_serial_remove), @@ -1634,6 +1665,7 @@ static struct platform_driver samsung_serial_driver = { .name = "samsung-uart", .owner = THIS_MODULE, .pm = SERIAL_SAMSUNG_PM_OPS, + .of_match_table = s3c24xx_uart_dt_match, }, }; |