diff options
Diffstat (limited to 'drivers/tty/serial/samsung.c')
| -rw-r--r-- | drivers/tty/serial/samsung.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index 89429410a245..376079b9bd75 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -1166,6 +1166,18 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport, ourport->tx_irq = ret; ourport->clk = clk_get(&platdev->dev, "uart"); + if (IS_ERR(ourport->clk)) { + pr_err("%s: Controller clock not found\n", + dev_name(&platdev->dev)); + return PTR_ERR(ourport->clk); + } + + ret = clk_prepare_enable(ourport->clk); + if (ret) { + pr_err("uart: clock failed to prepare+enable: %d\n", ret); + clk_put(ourport->clk); + return ret; + } /* Keep all interrupts masked and cleared */ if (s3c24xx_serial_has_interrupt_mask(port)) { @@ -1180,6 +1192,7 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport, /* reset the fifos (and setup the uart) */ s3c24xx_serial_resetport(port, cfg); + clk_disable_unprepare(ourport->clk); return 0; } @@ -1700,9 +1713,7 @@ static struct s3c24xx_serial_drv_data s5pv210_serial_drv_data = { #define S5PV210_SERIAL_DRV_DATA (kernel_ulong_t)NULL #endif -#if defined(CONFIG_CPU_EXYNOS4210) || defined(CONFIG_SOC_EXYNOS4212) || \ - defined(CONFIG_SOC_EXYNOS4412) || defined(CONFIG_SOC_EXYNOS5250) || \ - defined(CONFIG_SOC_EXYNOS5440) +#if defined(CONFIG_ARCH_EXYNOS) static struct s3c24xx_serial_drv_data exynos4210_serial_drv_data = { .info = &(struct s3c24xx_uart_info) { .name = "Samsung Exynos4 UART", @@ -1798,7 +1809,13 @@ static int __init s3c24xx_serial_modinit(void) return ret; } - return platform_driver_register(&samsung_serial_driver); + ret = platform_driver_register(&samsung_serial_driver); + if (ret < 0) { + pr_err("Failed to register platform driver\n"); + uart_unregister_driver(&s3c24xx_uart_drv); + } + + return ret; } static void __exit s3c24xx_serial_modexit(void) |