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From 29c8b2eef2011bf9392479487a51f6927892bfd6 Mon Sep 17 00:00:00 2001
From: Gabor Juhos <juhosg@openwrt.org>
Date: Mon, 20 Jun 2011 21:26:04 +0200
Subject: [PATCH 07/27] MIPS: ath79: add AR933X specific clock init
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>
---
arch/mips/ath79/clock.c | 55 ++++++++++++++++++++++++
arch/mips/include/asm/mach-ath79/ar71xx_regs.h | 22 +++++++++
arch/mips/include/asm/mach-ath79/ath79.h | 6 +++
3 files changed, 83 insertions(+), 0 deletions(-)
--- a/arch/mips/ath79/clock.c
+++ b/arch/mips/ath79/clock.c
@@ -110,6 +110,59 @@ static void __init ar913x_clocks_init(vo
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();
--- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
+++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
@@ -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
--- a/arch/mips/include/asm/mach-ath79/ath79.h
+++ b/arch/mips/include/asm/mach-ath79/ath79.h
@@ -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;
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