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authorGabor Juhos <juhosg@openwrt.org>2013-08-28 12:41:44 +0400
committerRalf Baechle <ralf@linux-mips.org>2013-09-04 01:22:17 +0400
commit2310780244d5c3b6cc843d4cc0b63332016678a0 (patch)
treea5d9acd309caa01f549d4c895687fe91235e2805 /arch/mips/ath79
parent837f036c8ab201965b9fb0f6b743a415f555493f (diff)
downloadlinux-2310780244d5c3b6cc843d4cc0b63332016678a0.tar.xz
MIPS: ath79: Use a helper function to get system clock rates
The ath79 platform uses similar code to get the rate of various clocks during init. Separate the similar code into a new helper function and use that to avoid code duplication. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5778/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/ath79')
-rw-r--r--arch/mips/ath79/clock.c16
-rw-r--r--arch/mips/ath79/common.h2
-rw-r--r--arch/mips/ath79/dev-common.c10
-rw-r--r--arch/mips/ath79/setup.c8
4 files changed, 25 insertions, 11 deletions
diff --git a/arch/mips/ath79/clock.c b/arch/mips/ath79/clock.c
index 4378d63bc3ed..c8351b46e566 100644
--- a/arch/mips/ath79/clock.c
+++ b/arch/mips/ath79/clock.c
@@ -400,6 +400,22 @@ void __init ath79_clocks_init(void)
(ath79_ref_clk.rate / 1000) % 1000);
}
+unsigned long __init
+ath79_get_sys_clk_rate(const char *id)
+{
+ struct clk *clk;
+ unsigned long rate;
+
+ clk = clk_get(NULL, id);
+ if (IS_ERR(clk))
+ panic("unable to get %s clock, err=%d", id, (int) PTR_ERR(clk));
+
+ rate = clk_get_rate(clk);
+ clk_put(clk);
+
+ return rate;
+}
+
/*
* Linux clock API
*/
diff --git a/arch/mips/ath79/common.h b/arch/mips/ath79/common.h
index 561906c2345e..648d2dafbc56 100644
--- a/arch/mips/ath79/common.h
+++ b/arch/mips/ath79/common.h
@@ -21,6 +21,8 @@
#define ATH79_MEM_SIZE_MAX (128 * 1024 * 1024)
void ath79_clocks_init(void);
+unsigned long ath79_get_sys_clk_rate(const char *id);
+
void ath79_ddr_wb_flush(unsigned int reg);
void ath79_gpio_function_enable(u32 mask);
diff --git a/arch/mips/ath79/dev-common.c b/arch/mips/ath79/dev-common.c
index a3a2741d0688..c3b04c929f29 100644
--- a/arch/mips/ath79/dev-common.c
+++ b/arch/mips/ath79/dev-common.c
@@ -81,21 +81,19 @@ static struct platform_device ar933x_uart_device = {
void __init ath79_register_uart(void)
{
- struct clk *clk;
+ unsigned long uart_clk_rate;
- clk = clk_get(NULL, "uart");
- if (IS_ERR(clk))
- panic("unable to get UART clock, err=%ld", PTR_ERR(clk));
+ uart_clk_rate = ath79_get_sys_clk_rate("uart");
if (soc_is_ar71xx() ||
soc_is_ar724x() ||
soc_is_ar913x() ||
soc_is_ar934x() ||
soc_is_qca955x()) {
- ath79_uart_data[0].uartclk = clk_get_rate(clk);
+ ath79_uart_data[0].uartclk = uart_clk_rate;
platform_device_register(&ath79_uart_device);
} else if (soc_is_ar933x()) {
- ar933x_uart_data.uartclk = clk_get_rate(clk);
+ ar933x_uart_data.uartclk = uart_clk_rate;
platform_device_register(&ar933x_uart_device);
} else {
BUG();
diff --git a/arch/mips/ath79/setup.c b/arch/mips/ath79/setup.c
index 80f4ecd42b0d..e3b83456d64e 100644
--- a/arch/mips/ath79/setup.c
+++ b/arch/mips/ath79/setup.c
@@ -209,13 +209,11 @@ void __init plat_mem_setup(void)
void __init plat_time_init(void)
{
- struct clk *clk;
+ unsigned long cpu_clk_rate;
- clk = clk_get(NULL, "cpu");
- if (IS_ERR(clk))
- panic("unable to get CPU clock, err=%ld", PTR_ERR(clk));
+ cpu_clk_rate = ath79_get_sys_clk_rate("cpu");
- mips_hpt_frequency = clk_get_rate(clk) / 2;
+ mips_hpt_frequency = cpu_clk_rate / 2;
}
static int __init ath79_setup(void)