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ARM: OMAP2+: UART: Avoid uart idling on suspend for no_console_suspend usecase

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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>
This commit is contained in:
Govindraj.R 2011-10-18 17:09:10 +05:30 committed by Kevin Hilman
parent 8612bd22f3
commit 08f86b3eab
1 changed files with 8 additions and 1 deletions
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9
arch/arm/mach-omap2/serial.c
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@ -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;