arm: rmobile: silk: Migrate serial driver to drivers model

This adds drivers model support of serial port to Silk board,
and migrate serial port to drivers model.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

board/renesas/silk/silk.c

@@ -9,6 +9,8 @@
 
 #include <common.h>
 #include <malloc.h>
+#include <dm.h>
+#include <dm/platform_data/serial_sh.h>
 #include <asm/processor.h>
 #include <asm/mach-types.h>
 #include <asm/io.h>
@@ -161,3 +163,15 @@ void reset_cpu(ulong addr)
 	val |= 0x02;
 	i2c_write(CONFIG_SYS_I2C_POWERIC_ADDR, 0x13, 1, &val, 1);
 }
+
+static const struct sh_serial_platdata serial_platdata = {
+	.base = SCIF2_BASE,
+	.type = PORT_SCIF,
+	.clk = 14745600,
+	.clk_mode = EXT_CLK,
+};
+
+U_BOOT_DEVICE(alt_serials) = {
+	.name = "serial_sh",
+	.platdata = &serial_platdata,
+};

configs/silk_defconfig

@@ -1,3 +1,5 @@
 CONFIG_ARM=y
 CONFIG_RMOBILE=y
 CONFIG_TARGET_SILK=y
+CONFIG_DM=y
+CONFIG_DM_SERIAL=y

include/configs/silk.h

@@ -39,8 +39,6 @@
 
 /* SCIF */
 #define CONFIG_SCIF_CONSOLE
-#define CONFIG_CONS_SCIF2
-#define CONFIG_SCIF_USE_EXT_CLK
 
 /* FLASH */
 #define CONFIG_SPI
@@ -71,7 +69,6 @@
 #define CONFIG_SH_TMU_CLK_FREQ	(CONFIG_SYS_CLK_FREQ / 2) /* EXT / 2 */
 #define CONFIG_PLL1_CLK_FREQ	(CONFIG_SYS_CLK_FREQ * 156 / 2)
 #define CONFIG_P_CLK_FREQ	(CONFIG_PLL1_CLK_FREQ / 24)
-#define CONFIG_SH_SCIF_CLK_FREQ	14745600 /* External Clock */
 
 #define CONFIG_SYS_TMU_CLK_DIV  4