ar71xx: use dynamic clock dividers on the 2nd MDIO of AR934x

SVN-Revision: 33343

target/linux/ar71xx/files/arch/mips/ath79/dev-eth.c

@@ -19,6 +19,7 @@
 #include <linux/etherdevice.h>
 #include <linux/platform_device.h>
 #include <linux/serial_8250.h>
+#include <linux/clk.h>
 
 #include <asm/mach-ath79/ath79.h>
 #include <asm/mach-ath79/ar71xx_regs.h>
@@ -146,6 +147,31 @@ static void ath79_mii_ctrl_set_speed(unsigned int reg, unsigned int speed)
 	iounmap(base);
 }
 
+static unsigned long ar934x_get_mdio_ref_clock(void)
+{
+	void __iomem *base;
+	unsigned long ret;
+	u32 t;
+
+	base = ioremap(AR71XX_PLL_BASE, AR71XX_PLL_SIZE);
+
+	ret = 0;
+	t = __raw_readl(base + AR934X_PLL_SWITCH_CLOCK_CONTROL_REG);
+	if (t & AR934X_PLL_SWITCH_CLOCK_CONTROL_MDIO_CLK_SEL) {
+		ret = 100 * 1000 * 1000;
+	} else {
+		struct clk *clk;
+
+		clk = clk_get(NULL, "ref");
+		if (!IS_ERR(clk))
+			ret = clk_get_rate(clk);
+	}
+
+	iounmap(base);
+
+	return ret;
+}
+
 void __init ath79_register_mdio(unsigned int id, u32 phy_mask)
 {
 	struct platform_device *mdio_dev;
@@ -217,6 +243,13 @@ void __init ath79_register_mdio(unsigned int id, u32 phy_mask)
 	case ATH79_SOC_AR9341:
 	case ATH79_SOC_AR9342:
 	case ATH79_SOC_AR9344:
+		if (id == 1) {
+			mdio_data->builtin_switch = 1;
+			mdio_data->ref_clock = ar934x_get_mdio_ref_clock();
+			mdio_data->mdio_clock = 6250000;
+		}
+		mdio_data->is_ar934x = 1;
+		break;
 	case ATH79_SOC_QCA9558:
 		if (id == 1)
 			mdio_data->builtin_switch = 1;

target/linux/ar71xx/patches-3.3/601-MIPS-ath79-add-more-register-defines.patch

@@ -74,15 +74,25 @@
  #define AR933X_PLL_CPU_CONFIG_REG	0x00
  #define AR933X_PLL_CLOCK_CTRL_REG	0x08
  
-@@ -212,6 +232,7 @@
+@@ -212,6 +232,8 @@
  #define AR934X_PLL_CPU_CONFIG_REG		0x00
  #define AR934X_PLL_DDR_CONFIG_REG		0x04
  #define AR934X_PLL_CPU_DDR_CLK_CTRL_REG		0x08
++#define AR934X_PLL_SWITCH_CLOCK_CONTROL_REG	0x24
 +#define AR934X_PLL_ETH_XMII_CONTROL_REG		0x2c
  
  #define AR934X_PLL_CPU_CONFIG_NFRAC_SHIFT	0
  #define AR934X_PLL_CPU_CONFIG_NFRAC_MASK	0x3f
-@@ -370,16 +391,50 @@
+@@ -244,6 +266,8 @@
+ #define AR934X_PLL_CPU_DDR_CLK_CTRL_DDRCLK_FROM_DDRPLL	BIT(21)
+ #define AR934X_PLL_CPU_DDR_CLK_CTRL_AHBCLK_FROM_DDRPLL	BIT(24)
+ 
++#define AR934X_PLL_SWITCH_CLOCK_CONTROL_MDIO_CLK_SEL	BIT(6)
++
+ #define QCA955X_PLL_CPU_CONFIG_REG		0x00
+ #define QCA955X_PLL_DDR_CONFIG_REG		0x04
+ #define QCA955X_PLL_CLK_CTRL_REG		0x08
+@@ -370,16 +394,50 @@
  #define AR913X_RESET_USB_HOST		BIT(5)
  #define AR913X_RESET_USB_PHY		BIT(4)
  
@@ -133,7 +143,7 @@
  #define AR933X_BOOTSTRAP_REF_CLK_40	BIT(0)
  
  #define AR934X_BOOTSTRAP_SW_OPTION8	BIT(23)
-@@ -520,6 +575,14 @@
+@@ -520,6 +578,14 @@
  #define AR71XX_GPIO_REG_INT_ENABLE	0x24
  #define AR71XX_GPIO_REG_FUNC		0x28
  
@@ -148,7 +158,7 @@
  #define AR71XX_GPIO_COUNT		16
  #define AR724X_GPIO_COUNT		18
  #define AR913X_GPIO_COUNT		22
-@@ -548,4 +611,133 @@
+@@ -548,4 +614,133 @@
  #define AR934X_SRIF_DPLL2_OUTDIV_SHIFT	13
  #define AR934X_SRIF_DPLL2_OUTDIV_MASK	0x7