[PATCH 05/13 v2] OMAP: UART: don't do automatic bus-level suspend/resume
From: Govindraj.R <hidden>
Date: 2010-09-22 15:13:51
Also in:
linux-omap, linux-serial
Subsystem:
arm port, omap2+ support, the rest · Maintainers:
Russell King, Aaro Koskinen, Andreas Kemnade, Kevin Hilman, Roger Quadros, Tony Lindgren, Linus Torvalds
From: Kevin Hilman <redacted> Since the omap_device for UART is currently managed inside the idle path itself, don't let the bus-level code suspend/resume the UART. To prevent this, pm_runtime_get() is used when preparing for suspend and pm_runtime_put() is used when finished with suspend. Signed-off-by: Kevin Hilman <redacted> Signed-off-by: Govindraj.R <redacted> --- arch/arm/mach-omap2/serial.c | 8 ++++++-- 1 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c
index 6ffbc92..ff83e91 100644
--- a/arch/arm/mach-omap2/serial.c
+++ b/arch/arm/mach-omap2/serial.c@@ -26,6 +26,7 @@ #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/serial_8250.h> +#include <linux/pm_runtime.h> #ifdef CONFIG_SERIAL_OMAP #include <plat/omap-serial.h>
@@ -530,14 +531,17 @@ void omap_uart_enable_irqs(int enable) struct omap_uart_state *uart; list_for_each_entry(uart, &uart_list, node) { - if (enable) + if (enable) { + pm_runtime_put_sync(&uart->pdev->dev); ret = request_threaded_irq(uart->irq, NULL, omap_uart_interrupt, IRQF_SHARED, "serial idle", (void *)uart); - else + } else { + pm_runtime_get_noresume(&uart->pdev->dev); free_irq(uart->irq, (void *)uart); + } } }
--
1.6.3.3