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| author | Govindraj.R <govindraj.raja@ti.com> | 2011-10-11 19:11:27 +0530 |
|---|---|---|
| committer | Kevin Hilman <khilman@ti.com> | 2011-12-14 16:05:22 -0800 |
| commit | ec3bebc6ec64aac23500e6b8ef5c0aaaeda735cf (patch) | |
| tree | 8d47117285aecdb37e65f1fc72b3070f45444433 /arch | |
| parent | 32212897eeb8c2b2b3c74dbd44d842963084d808 (diff) | |
| download | linux-stable-ec3bebc6ec64aac23500e6b8ef5c0aaaeda735cf.tar.gz linux-stable-ec3bebc6ec64aac23500e6b8ef5c0aaaeda735cf.tar.bz2 linux-stable-ec3bebc6ec64aac23500e6b8ef5c0aaaeda735cf.zip | |
ARM: OMAP2+: UART: Get context loss count to context restore
Avoid unconditional context restore every time we gate uart
clocks. Check whether context loss happened based on which
we can context restore uart regs from uart_port structure.
Signed-off-by: Govindraj.R <govindraj.raja@ti.com>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de> (for drivers/tty changes)
Signed-off-by: Kevin Hilman <khilman@ti.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-omap2/serial.c | 2 | ||||
| -rw-r--r-- | arch/arm/plat-omap/include/plat/omap-serial.h | 3 |
2 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c index b3f3284bf6ba..78ca7e8fc10b 100644 --- a/arch/arm/mach-omap2/serial.c +++ b/arch/arm/mach-omap2/serial.c @@ -33,6 +33,7 @@ #include <plat/dma.h> #include <plat/omap_hwmod.h> #include <plat/omap_device.h> +#include <plat/omap-pm.h> #include "prm2xxx_3xxx.h" #include "pm.h" @@ -478,6 +479,7 @@ void __init omap_serial_init_port(struct omap_board_data *bdata) omap_up.dma_enabled = uart->dma_enabled; omap_up.uartclk = OMAP24XX_BASE_BAUD * 16; omap_up.flags = UPF_BOOT_AUTOCONF; + omap_up.get_context_loss_count = omap_pm_get_dev_context_loss_count; pdata = &omap_up; pdata_size = sizeof(struct omap_uart_port_info); diff --git a/arch/arm/plat-omap/include/plat/omap-serial.h b/arch/arm/plat-omap/include/plat/omap-serial.h index 5b913c71cd7f..348c9ead6edb 100644 --- a/arch/arm/plat-omap/include/plat/omap-serial.h +++ b/arch/arm/plat-omap/include/plat/omap-serial.h @@ -62,6 +62,8 @@ struct omap_uart_port_info { bool dma_enabled; /* To specify DMA Mode */ unsigned int uartclk; /* UART clock rate */ upf_t flags; /* UPF_* flags */ + + int (*get_context_loss_count)(struct device *); }; struct uart_omap_dma { @@ -114,6 +116,7 @@ struct uart_omap_port { unsigned char msr_saved_flags; char name[20]; unsigned long port_activity; + u32 context_loss_cnt; }; #endif /* __OMAP_SERIAL_H__ */ |