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| author | Govindraj.R <govindraj.raja@ti.com> | 2011-10-18 15:39:10 +0400 |
|---|---|---|
| committer | Kevin Hilman <khilman@ti.com> | 2011-12-15 04:05:26 +0400 |
| commit | 08f86b3eab9807e6d36de7e00025abad893ff557 (patch) | |
| tree | 6f44b56d6cb9c0b49e0750e18f9465e1d2f5ee9d /arch/arm/mach-omap2/serial.c | |
| parent | 8612bd22f30369745d0fda0d540aca39ab591cc5 (diff) | |
| download | linux-08f86b3eab9807e6d36de7e00025abad893ff557.tar.xz | |
ARM: OMAP2+: UART: Avoid uart idling on suspend for no_console_suspend usecase
If no_console_suspend is used we have prevent uart idling during suspend
to provide debug prints.
Power domain hooks can idle uarts if left enabled during system wide suspend
so re-use the omap_device_disable_idle_on_suspend API's to ensure console_uart
is not idled during suspend.
omap_device_disable_idle_on_suspend API was used on all uarts since the uart
driver was not runtime adapted, now with runtime adaptation we can re-use this
API only for no_console_suspend use cases.
Signed-off-by: Govindraj.R <govindraj.raja@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>
Diffstat (limited to 'arch/arm/mach-omap2/serial.c')
| -rw-r--r-- | arch/arm/mach-omap2/serial.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c index 85516c946ef0..6c8135a9d35d 100644 --- a/arch/arm/mach-omap2/serial.c +++ b/arch/arm/mach-omap2/serial.c @@ -64,6 +64,7 @@ struct omap_uart_state { static LIST_HEAD(uart_list); static u8 num_uarts; static u8 console_uart_id = -1; +static u8 no_console_suspend; #define DEFAULT_RXDMA_POLLRATE 1 /* RX DMA polling rate (us) */ #define DEFAULT_RXDMA_BUFSIZE 4096 /* RX DMA buffer size */ @@ -298,6 +299,10 @@ static int __init omap_serial_early_init(void) if (cmdline_find_option(uart_name)) { console_uart_id = uart->num; + + if (cmdline_find_option("no_console_suspend")) + no_console_suspend = true; + /* * omap-uart can be used for earlyprintk logs * So if omap-uart is used as console then prevent @@ -385,7 +390,9 @@ void __init omap_serial_init_port(struct omap_board_data *bdata, WARN(IS_ERR(pdev), "Could not build omap_device for %s: %s.\n", name, oh->name); - omap_device_disable_idle_on_suspend(pdev); + if ((console_uart_id == bdata->id) && no_console_suspend) + omap_device_disable_idle_on_suspend(pdev); + oh->mux = omap_hwmod_mux_init(bdata->pads, bdata->pads_cnt); uart->pdev = pdev; |