From 08f86b3eab9807e6d36de7e00025abad893ff557 Mon Sep 17 00:00:00 2001 From: "Govindraj.R" Date: Tue, 18 Oct 2011 17:09:10 +0530 Subject: 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 Signed-off-by: Kevin Hilman diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c index 85516c9..6c8135a 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; -- cgit v0.10.2