stm32f7: use driver model for sdram initialization

As driver model takes care of pin control configuraion, this patch also
removes the sdram/fmc pin configuration.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
cc: Christophe KERELLO <christophe.kerello@st.com>

board/st/stm32f746-disco/stm32f746-disco.c

@@ -6,6 +6,8 @@
  */
 
 #include <common.h>
+#include <dm.h>
+#include <ram.h>
 #include <asm/io.h>
 #include <asm/armv7m.h>
 #include <asm/arch/stm32.h>
@@ -26,66 +28,8 @@ const struct stm32_gpio_ctl gpio_ctl_gpout = {
 	.af = STM32_GPIO_AF0
 };
 
-const struct stm32_gpio_ctl gpio_ctl_fmc = {
-	.mode = STM32_GPIO_MODE_AF,
-	.otype = STM32_GPIO_OTYPE_PP,
-	.speed = STM32_GPIO_SPEED_100M,
-	.pupd = STM32_GPIO_PUPD_NO,
-	.af = STM32_GPIO_AF12
-};
-
-static const struct stm32_gpio_dsc ext_ram_fmc_gpio[] = {
-	/* Chip is LQFP144, see DM00077036.pdf for details */
-	{STM32_GPIO_PORT_D, STM32_GPIO_PIN_10},	/* 79, FMC_D15 */
-	{STM32_GPIO_PORT_D, STM32_GPIO_PIN_9},	/* 78, FMC_D14 */
-	{STM32_GPIO_PORT_D, STM32_GPIO_PIN_8},	/* 77, FMC_D13 */
-	{STM32_GPIO_PORT_E, STM32_GPIO_PIN_15},	/* 68, FMC_D12 */
-	{STM32_GPIO_PORT_E, STM32_GPIO_PIN_14},	/* 67, FMC_D11 */
-	{STM32_GPIO_PORT_E, STM32_GPIO_PIN_13},	/* 66, FMC_D10 */
-	{STM32_GPIO_PORT_E, STM32_GPIO_PIN_12},	/* 65, FMC_D9 */
-	{STM32_GPIO_PORT_E, STM32_GPIO_PIN_11},	/* 64, FMC_D8 */
-	{STM32_GPIO_PORT_E, STM32_GPIO_PIN_10},	/* 63, FMC_D7 */
-	{STM32_GPIO_PORT_E, STM32_GPIO_PIN_9},	/* 60, FMC_D6 */
-	{STM32_GPIO_PORT_E, STM32_GPIO_PIN_8},	/* 59, FMC_D5 */
-	{STM32_GPIO_PORT_E, STM32_GPIO_PIN_7},	/* 58, FMC_D4 */
-	{STM32_GPIO_PORT_D, STM32_GPIO_PIN_1},	/* 115, FMC_D3 */
-	{STM32_GPIO_PORT_D, STM32_GPIO_PIN_0},	/* 114, FMC_D2 */
-	{STM32_GPIO_PORT_D, STM32_GPIO_PIN_15},	/* 86, FMC_D1 */
-	{STM32_GPIO_PORT_D, STM32_GPIO_PIN_14},	/* 85, FMC_D0 */
-
-	{STM32_GPIO_PORT_E, STM32_GPIO_PIN_1},	/* 142, FMC_NBL1 */
-	{STM32_GPIO_PORT_E, STM32_GPIO_PIN_0},	/* 141, FMC_NBL0 */
-
-	{STM32_GPIO_PORT_G, STM32_GPIO_PIN_5},	/* 90, FMC_A15, BA1 */
-	{STM32_GPIO_PORT_G, STM32_GPIO_PIN_4},	/* 89, FMC_A14, BA0 */
-
-	{STM32_GPIO_PORT_G, STM32_GPIO_PIN_1},	/* 57, FMC_A11 */
-	{STM32_GPIO_PORT_G, STM32_GPIO_PIN_0},	/* 56, FMC_A10 */
-	{STM32_GPIO_PORT_F, STM32_GPIO_PIN_15},	/* 55, FMC_A9 */
-	{STM32_GPIO_PORT_F, STM32_GPIO_PIN_14},	/* 54, FMC_A8 */
-	{STM32_GPIO_PORT_F, STM32_GPIO_PIN_13},	/* 53, FMC_A7 */
-	{STM32_GPIO_PORT_F, STM32_GPIO_PIN_12},	/* 50, FMC_A6 */
-	{STM32_GPIO_PORT_F, STM32_GPIO_PIN_5},	/* 15, FMC_A5 */
-	{STM32_GPIO_PORT_F, STM32_GPIO_PIN_4},	/* 14, FMC_A4 */
-	{STM32_GPIO_PORT_F, STM32_GPIO_PIN_3},	/* 13, FMC_A3 */
-	{STM32_GPIO_PORT_F, STM32_GPIO_PIN_2},	/* 12, FMC_A2 */
-	{STM32_GPIO_PORT_F, STM32_GPIO_PIN_1},	/* 11, FMC_A1 */
-	{STM32_GPIO_PORT_F, STM32_GPIO_PIN_0},	/* 10, FMC_A0 */
-
-	{STM32_GPIO_PORT_H, STM32_GPIO_PIN_3},	/* 136, SDRAM_NE */
-	{STM32_GPIO_PORT_F, STM32_GPIO_PIN_11},	/* 49, SDRAM_NRAS */
-	{STM32_GPIO_PORT_G, STM32_GPIO_PIN_15},	/* 132, SDRAM_NCAS */
-	{STM32_GPIO_PORT_H, STM32_GPIO_PIN_5},	/* 26, SDRAM_NWE */
-	{STM32_GPIO_PORT_C, STM32_GPIO_PIN_3},	/* 135, SDRAM_CKE */
-
-	{STM32_GPIO_PORT_G, STM32_GPIO_PIN_8},	/* 93, SDRAM_CLK */
-};
-
 static int fmc_setup_gpio(void)
 {
-	int rv = 0;
-	int i;
-
 	clock_setup(GPIO_B_CLOCK_CFG);
 	clock_setup(GPIO_C_CLOCK_CFG);
 	clock_setup(GPIO_D_CLOCK_CFG);
@@ -94,19 +38,13 @@ static int fmc_setup_gpio(void)
 	clock_setup(GPIO_G_CLOCK_CFG);
 	clock_setup(GPIO_H_CLOCK_CFG);
 
-	for (i = 0; i < ARRAY_SIZE(ext_ram_fmc_gpio); i++) {
-		rv = stm32_gpio_config(&ext_ram_fmc_gpio[i],
-				&gpio_ctl_fmc);
-		if (rv)
-			goto out;
-	}
-
-out:
-	return rv;
+	return 0;
 }
 
 int dram_init(void)
 {
+	struct udevice *dev;
+	struct ram_info ram;
 	int rv;
 
 	rv = fmc_setup_gpio();
@@ -114,15 +52,26 @@ int dram_init(void)
 		return rv;
 
 	clock_setup(FMC_CLOCK_CFG);
-	stm32_sdram_init();
+
+	rv = uclass_get_device(UCLASS_RAM, 0, &dev);
+	if (rv) {
+		debug("DRAM init failed: %d\n", rv);
+		return rv;
+	}
+	rv = ram_get_info(dev, &ram);
+	if (rv) {
+		debug("Cannot get DRAM size: %d\n", rv);
+		return rv;
+	}
+	debug("SDRAM base=%lx, size=%x\n", ram.base, ram.size);
+	gd->ram_size = ram.size;
 
 	/*
 	 * Fill in global info with description of SRAM configuration
 	 */
 	gd->bd->bi_dram[0].start = CONFIG_SYS_RAM_BASE;
-	gd->bd->bi_dram[0].size  = CONFIG_SYS_RAM_SIZE;
+	gd->bd->bi_dram[0].size  = ram.size;
 
-	gd->ram_size = CONFIG_SYS_RAM_SIZE;
 	return rv;
 }