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authorBoojin Kim <boojin.kim@samsung.com>2011-05-27 19:04:03 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2011-06-07 09:25:34 -0700
commit470f22975448a65a1084a6f0721fa5df15323f02 (patch)
tree91557ad66ac89f6d244150a012eba3c4d7fa09ef /arch
parentaf99d6f0037d970084b03d9690f50e34d6f70dae (diff)
downloadop-kernel-dev-470f22975448a65a1084a6f0721fa5df15323f02.zip
op-kernel-dev-470f22975448a65a1084a6f0721fa5df15323f02.tar.gz
ARM: SAMSUNG: serial: Fix on handling of one clock source for UART
This patch fixes the way of comparison for handling of two or more clock sources for UART. For example, if just only one clock source is defined even though there are two clock sources for UART, the serial driver does not set proper clock up. Of course, it is problem. So this patch changes the condition of comparison to avoid useless setup clock and adds a flag 'NO_NEED_CHECK_CLKSRC' which means selection of source clock is not required. In addition, since the Exynos4210 has only one clock source for UART this patch adds the flag into its common_init_uarts(). Signed-off-by: Boojin Kim <boojin.kim@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-exynos4/init.c1
-rw-r--r--arch/arm/plat-samsung/include/plat/regs-serial.h2
2 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos4/init.c b/arch/arm/mach-exynos4/init.c
index cf91f50..a8a83e3 100644
--- a/arch/arm/mach-exynos4/init.c
+++ b/arch/arm/mach-exynos4/init.c
@@ -35,6 +35,7 @@ void __init exynos4_common_init_uarts(struct s3c2410_uartcfg *cfg, int no)
tcfg->clocks = exynos4_serial_clocks;
tcfg->clocks_size = ARRAY_SIZE(exynos4_serial_clocks);
}
+ tcfg->flags |= NO_NEED_CHECK_CLKSRC;
}
s3c24xx_init_uartdevs("s5pv210-uart", s5p_uart_resources, cfg, no);
diff --git a/arch/arm/plat-samsung/include/plat/regs-serial.h b/arch/arm/plat-samsung/include/plat/regs-serial.h
index c151c5f..116edfe 100644
--- a/arch/arm/plat-samsung/include/plat/regs-serial.h
+++ b/arch/arm/plat-samsung/include/plat/regs-serial.h
@@ -224,6 +224,8 @@
#define S5PV210_UFSTAT_RXMASK (255<<0)
#define S5PV210_UFSTAT_RXSHIFT (0)
+#define NO_NEED_CHECK_CLKSRC 1
+
#ifndef __ASSEMBLY__
/* struct s3c24xx_uart_clksrc
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