joel16/android_kernel_sony_msm8994_rework
1
0
Fork 0
mirror of https://github.com/joel16/android_kernel_sony_msm8994_rework.git synced 2024-12-11 21:54:46 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

serial: samsung: enable clock before clearing pending interrupts during init

Browse Source 
Ensure that the uart controller clock is enabled prior to writing to the
interrupt mask and pending registers in the s3c24xx_serial_init_port
function.

Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chander Kashyap 2013-05-28 18:32:07 +05:30 committed by Greg Kroah-Hartman
parent bff09b099b
commit 60e9357547
1 changed files with 13 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/tty/serial/samsung.c
View File

@ -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;
}