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MIPS: ath79: add AR933X specific clock init

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Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: Kathy Giori <kgiori@qca.qualcomm.com>
Cc: "Luis R.  Rodriguez" <rodrigue@qca.qualcomm.com>
Patchwork: https://patchwork.linux-mips.org/patch/2522/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Gabor Juhos 2011-06-20 21:26:04 +02:00 committed by Ralf Baechle
parent 0bd3acdf7d
commit 04225e1d22
3 changed files with 83 additions and 0 deletions
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55
arch/mips/ath79/clock.c
View File

@ -110,6 +110,59 @@ static void __init ar913x_clocks_init(void)
ath79_uart_clk.rate = ath79_ahb_clk.rate;
}
static void __init ar933x_clocks_init(void)
{
u32 clock_ctrl;
u32 cpu_config;
u32 freq;
u32 t;
t = ath79_reset_rr(AR933X_RESET_REG_BOOTSTRAP);
if (t & AR933X_BOOTSTRAP_REF_CLK_40)
ath79_ref_clk.rate = (40 * 1000 * 1000);
else
ath79_ref_clk.rate = (25 * 1000 * 1000);
clock_ctrl = ath79_pll_rr(AR933X_PLL_CLOCK_CTRL_REG);
if (clock_ctrl & AR933X_PLL_CLOCK_CTRL_BYPASS) {
ath79_cpu_clk.rate = ath79_ref_clk.rate;
ath79_ahb_clk.rate = ath79_ref_clk.rate;
ath79_ddr_clk.rate = ath79_ref_clk.rate;
} else {
cpu_config = ath79_pll_rr(AR933X_PLL_CPU_CONFIG_REG);
t = (cpu_config >> AR933X_PLL_CPU_CONFIG_REFDIV_SHIFT) &
AR933X_PLL_CPU_CONFIG_REFDIV_MASK;
freq = ath79_ref_clk.rate / t;
t = (cpu_config >> AR933X_PLL_CPU_CONFIG_NINT_SHIFT) &
AR933X_PLL_CPU_CONFIG_NINT_MASK;
freq *= t;
t = (cpu_config >> AR933X_PLL_CPU_CONFIG_OUTDIV_SHIFT) &
AR933X_PLL_CPU_CONFIG_OUTDIV_MASK;
if (t == 0)
t = 1;
freq >>= t;
t = ((clock_ctrl >> AR933X_PLL_CLOCK_CTRL_CPU_DIV_SHIFT) &
AR933X_PLL_CLOCK_CTRL_CPU_DIV_MASK) + 1;
ath79_cpu_clk.rate = freq / t;
t = ((clock_ctrl >> AR933X_PLL_CLOCK_CTRL_DDR_DIV_SHIFT) &
AR933X_PLL_CLOCK_CTRL_DDR_DIV_MASK) + 1;
ath79_ddr_clk.rate = freq / t;
t = ((clock_ctrl >> AR933X_PLL_CLOCK_CTRL_AHB_DIV_SHIFT) &
AR933X_PLL_CLOCK_CTRL_AHB_DIV_MASK) + 1;
ath79_ahb_clk.rate = freq / t;
}
ath79_wdt_clk.rate = ath79_ref_clk.rate;
ath79_uart_clk.rate = ath79_ref_clk.rate;
}
void __init ath79_clocks_init(void)
{
if (soc_is_ar71xx())
@ -118,6 +171,8 @@ void __init ath79_clocks_init(void)
ar724x_clocks_init();
else if (soc_is_ar913x())
ar913x_clocks_init();
else if (soc_is_ar933x())
ar933x_clocks_init();
else
BUG();

22
arch/mips/include/asm/mach-ath79/ar71xx_regs.h
View File

@ -123,6 +123,24 @@
#define AR913X_AHB_DIV_SHIFT 19
#define AR913X_AHB_DIV_MASK 0x1
#define AR933X_PLL_CPU_CONFIG_REG 0x00
#define AR933X_PLL_CLOCK_CTRL_REG 0x08
#define AR933X_PLL_CPU_CONFIG_NINT_SHIFT 10
#define AR933X_PLL_CPU_CONFIG_NINT_MASK 0x3f
#define AR933X_PLL_CPU_CONFIG_REFDIV_SHIFT 16
#define AR933X_PLL_CPU_CONFIG_REFDIV_MASK 0x1f
#define AR933X_PLL_CPU_CONFIG_OUTDIV_SHIFT 23
#define AR933X_PLL_CPU_CONFIG_OUTDIV_MASK 0x7
#define AR933X_PLL_CLOCK_CTRL_BYPASS BIT(2)
#define AR933X_PLL_CLOCK_CTRL_CPU_DIV_SHIFT 5
#define AR933X_PLL_CLOCK_CTRL_CPU_DIV_MASK 0x3
#define AR933X_PLL_CLOCK_CTRL_DDR_DIV_SHIFT 10
#define AR933X_PLL_CLOCK_CTRL_DDR_DIV_MASK 0x3
#define AR933X_PLL_CLOCK_CTRL_AHB_DIV_SHIFT 15
#define AR933X_PLL_CLOCK_CTRL_AHB_DIV_MASK 0x7
/*
* USB_CONFIG block
*/
@ -155,6 +173,8 @@
#define AR724X_RESET_REG_RESET_MODULE 0x1c
#define AR933X_RESET_REG_BOOTSTRAP 0xac
#define MISC_INT_ETHSW BIT(12)
#define MISC_INT_TIMER4 BIT(10)
#define MISC_INT_TIMER3 BIT(9)
@ -204,6 +224,8 @@
#define AR913X_RESET_USB_HOST BIT(5)
#define AR913X_RESET_USB_PHY BIT(4)
#define AR933X_BOOTSTRAP_REF_CLK_40 BIT(0)
#define REV_ID_MAJOR_MASK 0xfff0
#define REV_ID_MAJOR_AR71XX 0x00a0
#define REV_ID_MAJOR_AR913X 0x00b0

6
arch/mips/include/asm/mach-ath79/ath79.h
View File

@ -68,6 +68,12 @@ static inline int soc_is_ar913x(void)
ath79_soc == ATH79_SOC_AR9132);
}
static inline int soc_is_ar933x(void)
{
return (ath79_soc == ATH79_SOC_AR9330 ||
ath79_soc == ATH79_SOC_AR9331);
}
extern void __iomem *ath79_ddr_base;
extern void __iomem *ath79_pll_base;
extern void __iomem *ath79_reset_base;