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authorGabor Juhos <juhosg@openwrt.org>2009-07-01 19:34:59 +0000
committerGabor Juhos <juhosg@openwrt.org>2009-07-01 19:34:59 +0000
commiteb3ff716c18876f4ecfeed27da2c18bf45794008 (patch)
tree29c3befc7c80477d8d372105d1d458524477764e /target/linux/ar71xx
parent18d7edb82e76e1b56ec8a4b6f7766758cc85815a (diff)
downloadupstream-eb3ff716c18876f4ecfeed27da2c18bf45794008.tar.gz
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add AR7240 specific frequency detection
SVN-Revision: 16645
Diffstat (limited to 'target/linux/ar71xx')
-rw-r--r--target/linux/ar71xx/files/arch/mips/ar71xx/setup.c28
-rw-r--r--target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h11
2 files changed, 39 insertions, 0 deletions
diff --git a/target/linux/ar71xx/files/arch/mips/ar71xx/setup.c b/target/linux/ar71xx/files/arch/mips/ar71xx/setup.c
index f35444901d..1d99bb52fb 100644
--- a/target/linux/ar71xx/files/arch/mips/ar71xx/setup.c
+++ b/target/linux/ar71xx/files/arch/mips/ar71xx/setup.c
@@ -33,6 +33,7 @@
#define AR71XX_SYS_TYPE_LEN 64
#define AR71XX_BASE_FREQ 40000000
#define AR91XX_BASE_FREQ 5000000
+#define AR724X_BASE_FREQ 5000000
enum ar71xx_mach_type ar71xx_mach;
@@ -206,6 +207,29 @@ static void __init ar71xx_detect_sys_frequency(void)
ar71xx_ahb_freq = ar71xx_cpu_freq / div;
}
+static void __init ar724x_detect_sys_frequency(void)
+{
+ u32 pll;
+ u32 freq;
+ u32 div;
+
+ pll = ar71xx_pll_rr(AR724X_PLL_REG_CPU_CONFIG);
+
+ div = ((pll >> AR724X_PLL_DIV_SHIFT) & AR724X_PLL_DIV_MASK);
+ freq = div * AR724X_BASE_FREQ;
+
+ div = ((pll >> AR724X_PLL_REF_DIV_SHIFT) & AR724X_PLL_REF_DIV_MASK);
+ freq *= div;
+
+ ar71xx_cpu_freq = freq;
+
+ div = ((pll >> AR724X_DDR_DIV_SHIFT) & AR724X_DDR_DIV_MASK) + 1;
+ ar71xx_ddr_freq = freq / div;
+
+ div = (((pll >> AR724X_AHB_DIV_SHIFT) & AR724X_AHB_DIV_MASK) + 1) * 2;
+ ar71xx_ahb_freq = ar71xx_cpu_freq / div;
+}
+
static void __init detect_sys_frequency(void)
{
switch (ar71xx_soc) {
@@ -215,6 +239,10 @@ static void __init detect_sys_frequency(void)
ar71xx_detect_sys_frequency();
break;
+ case AR71XX_SOC_AR7240:
+ ar724x_detect_sys_frequency();
+ break;
+
case AR71XX_SOC_AR9130:
case AR71XX_SOC_AR9132:
ar91xx_detect_sys_frequency();
diff --git a/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h b/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h
index 198c4bfc01..8a45a0c90e 100644
--- a/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h
+++ b/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h
@@ -157,6 +157,17 @@ extern enum ar71xx_mach_type ar71xx_mach;
#define AR71XX_ETH0_PLL_SHIFT 17
#define AR71XX_ETH1_PLL_SHIFT 19
+#define AR724X_PLL_REG_CPU_CONFIG 0x00
+
+#define AR724X_PLL_DIV_SHIFT 0
+#define AR724X_PLL_DIV_MASK 0x3ff
+#define AR724X_PLL_REF_DIV_SHIFT 10
+#define AR724X_PLL_REF_DIV_MASK 0xf
+#define AR724X_AHB_DIV_SHIFT 19
+#define AR724X_AHB_DIV_MASK 0x1
+#define AR724X_DDR_DIV_SHIFT 22
+#define AR724X_DDR_DIV_MASK 0x3
+
#define AR91XX_PLL_REG_CPU_CONFIG 0x00
#define AR91XX_PLL_REG_ETH_CONFIG 0x04
#define AR91XX_PLL_REG_ETH0_INT_CLOCK 0x14