diff options
| author | Naveen Kumar Gaddipati <naveen.gaddipati@stericsson.com> | 2011-03-03 14:28:30 +0530 |
|---|---|---|
| committer | Henrik Öhman <henrik.ohman@stericsson.com> | 2011-03-15 13:15:41 +0100 |
| commit | 6f09c2674c0f56ef021464e5c3e5c737199c5272 (patch) | |
| tree | 85b059e136834098115dd0cea8ae84c6a7f418ab /arch | |
| parent | 478c3c96217c2d4107a6a9c8afdb8416c61ac338 (diff) | |
uart:BT works after suspend and resume
During suspend uart.0 seem to handle it's irq incorrectly.
BT works after suspend and resume.This has been fixed by
store and restoring only the enabled uart ports
and console port register values.
ST-Ericsson Id: ER 326768
Change-Id: Id5a12e69e92f7992c250e00bb7c8d857f99eb6c9
Signed-off-by: Naveen Kumar Gaddipati <naveen.gaddipati@stericsson.com>
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/17484
Reviewed-by: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
Reviewed-by: QATOOLS
Reviewed-by: Martin PERSSON <martin.persson@stericsson.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-ux500/uart-db8500.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/arm/mach-ux500/uart-db8500.c b/arch/arm/mach-ux500/uart-db8500.c index 5bd0b7d261a..0fb6679c953 100644 --- a/arch/arm/mach-ux500/uart-db8500.c +++ b/arch/arm/mach-ux500/uart-db8500.c @@ -78,6 +78,16 @@ static void save_uart(void) int i; for (i = 0; i < UX500_NR_UARTS; i++) { + /* + * No need to store the UART register values + * for the port which is already disabled the clock + * other than the console port. + */ + context_uart[i].cr = + readl(context_uart[i].base + UART011_CR); + if ((!context_uart[i].cr) && (i != CONFIG_UX500_DEBUG_UART)) + continue; + clk_enable(context_uart[i].uart_clk); context_uart[i].dr = @@ -137,6 +147,14 @@ static void restore_uart(void) int i, cnt; for (i = 0; i < UX500_NR_UARTS; i++) { + /* + * No need to restore the UART register values + * for the port which is already disabled the clock + * other than the console port. + */ + if ((!context_uart[i].cr) && (i != CONFIG_UX500_DEBUG_UART)) + continue; + clk_enable(context_uart[i].uart_clk); writel(context_uart[i].dr, |