stm32 eth: don't configure MCO1 (use external clock for PHY)

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

drivers/net/stm32_eth.c

@@ -155,23 +155,6 @@
 /*
  * STM32 RCC MAC specific definitions
  */
-#define STM32_RCC_CFGR_MCO1_BIT		21		/* MC clock output 1  */
-#define STM32_RCC_CFGR_MCO1_MSK		0x3
-
-#define STM32_RCC_CFGR_MCO1_HSI		0x0		/* Clock source	      */
-#define STM32_RCC_CFGR_MCO1_LSE		0x1
-#define STM32_RCC_CFGR_MCO1_HSE		0x2
-#define STM32_RCC_CFGR_MCO1_PLL		0x3
-
-#define STM32_RCC_CFGR_MCO1PRE_BIT	24		/* MCO1 prescaler     */
-#define STM32_RCC_CFGR_MCO1PRE_MSK	0x7
-
-#define STM32_RCC_CFGR_MCO1PRE_DIVNO	0x0		/* Division by X      */
-#define STM32_RCC_CFGR_MCO1PRE_DIV2	0x4
-#define STM32_RCC_CFGR_MCO1PRE_DIV3	0x5
-#define STM32_RCC_CFGR_MCO1PRE_DIV4	0x6
-#define STM32_RCC_CFGR_MCO1PRE_DIV5	0x7
-
 #define STM32_RCC_AHB1RSTR_MAC		(1 << 25)	/* Reset MAC	      */
 
 #define STM32_RXX_ENR_SYSCFG		(1 << 14)	/* SYSCFG clock	      */
@@ -333,8 +316,6 @@ struct stm_mac_gpio {
 /*
  * Ethernet GPIOs:
  *
- * MCO ------------------------------> PA8
- *
  * ETH_MII_RX_CLK/ETH_RMII_REF_CLK---> PA1
  * ETH_MDIO -------------------------> PA2
  * ETH_MII_RX_DV/ETH_RMII_CRS_DV ----> PA7
@@ -773,7 +754,6 @@ static void stm_mac_address_set(struct stm_eth_dev *mac)
  */
 static int stm_mac_gpio_init(struct stm_eth_dev *mac)
 {
-	static struct stm32f2_gpio_dsc	mco_gpio = {0, 8};
 	static int	gpio_inited;
 
 	u32		val;
@@ -797,26 +777,6 @@ static int stm_mac_gpio_init(struct stm_eth_dev *mac)
 	 */
 	STM32_RCC->apb2enr |= STM32_RXX_ENR_SYSCFG;
 
-	/*
-	 * Configure MC0: PA8
-	 */
-	rv = stm32f2_gpio_config(&mco_gpio, STM32F2_GPIO_ROLE_MCO);
-	if (rv != 0)
-		goto out;
-
-	/*
-	 * Output HSE clock (25MHz) on MCO pin (PA8) to clock the PHY
-	 */
-	val  = STM32_RCC->cfgr;
-
-	val &= ~(STM32_RCC_CFGR_MCO1_MSK << STM32_RCC_CFGR_MCO1_BIT);
-	val |= STM32_RCC_CFGR_MCO1_HSE << STM32_RCC_CFGR_MCO1_BIT;
-
-	val &= ~(STM32_RCC_CFGR_MCO1PRE_MSK << STM32_RCC_CFGR_MCO1PRE_BIT);
-	val |= STM32_RCC_CFGR_MCO1PRE_DIVNO << STM32_RCC_CFGR_MCO1PRE_BIT;
-
-	STM32_RCC->cfgr = val;
-
 	/*
 	 * Set MII mode
 	 */