arm: s5p4418: dm_serial: remove old code / add DEBUG_UART

Remove init of UART-clock and UART-reset in arch_cpu_init(). Add DEBUG_UART
to s5p4418_nanopi2_defconfig.

Signed-off-by: Stefan Bosch <stefan_b@posteo.net>

arch/arm/cpu/armv7/s5p4418/cpu.c

@@ -13,10 +13,8 @@
 #include <asm/io.h>
 #include <asm/arch/nexell.h>
 #include <asm/arch/clk.h>
-#include <asm/arch/reset.h>
 #include <asm/arch/tieoff.h>
 #include <cpu_func.h>
-#include <linux/delay.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -45,39 +43,12 @@ static void cpu_soc_init(void)
 	nx_tieoff_set(NX_TIEOFF_CORTEXA9MP_TOP_QUADL2C_L2RET1N_1, 1);
 }
 
-#ifdef CONFIG_PL011_SERIAL
-static void serial_device_init(void)
-{
-	char dev[10];
-	int id;
-
-	sprintf(dev, "nx-uart.%d", CONFIG_CONS_INDEX);
-	id = RESET_ID_UART0 + CONFIG_CONS_INDEX;
-
-	struct clk *clk = clk_get((const char *)dev);
-
-	/* reset control: Low active ___|---   */
-	nx_rstcon_setrst(id, RSTCON_ASSERT);
-	udelay(10);
-	nx_rstcon_setrst(id, RSTCON_NEGATE);
-	udelay(10);
-
-	/* set clock   */
-	clk_disable(clk);
-	clk_set_rate(clk, CFG_PL011_CLOCK);
-	clk_enable(clk);
-}
-#endif
-
 int arch_cpu_init(void)
 {
 	flush_dcache_all();
 	cpu_soc_init();
 	clk_init();
 
-	if (IS_ENABLED(CONFIG_PL011_SERIAL))
-		serial_device_init();
-
 	return 0;
 }
 

arch/arm/mach-nexell/clock.c

@@ -856,7 +856,7 @@ void __init clk_init(void)
 		}
 
 		/* prevent uart clock disable for low step debug message */
-		#ifndef CONFIG_DEBUG_NX_UART
+		#ifndef CONFIG_DEBUG_UART
 		if (peri->dev_name) {
 			#ifdef CONFIG_BACKLIGHT_PWM
 			if (!strcmp(peri->dev_name, DEV_NAME_PWM))

configs/s5p4418_nanopi2_defconfig

@@ -11,12 +11,15 @@ CONFIG_ENV_OFFSET=0x2E0200
 CONFIG_DM_GPIO=y
 CONFIG_DEFAULT_DEVICE_TREE="s5p4418-nanopi2"
 CONFIG_SYS_PROMPT="nanopi2# "
+CONFIG_DEBUG_UART_BASE=0xC00A1000
+CONFIG_DEBUG_UART_CLOCK=150000000
 CONFIG_TARGET_NANOPI2=y
 CONFIG_S5P4418_ONEWIRE=y
 CONFIG_ROOT_DEV=1
 CONFIG_BOOT_PART=1
 CONFIG_ROOT_PART=2
 CONFIG_SYS_LOAD_ADDR=0x71080000
+CONFIG_DEBUG_UART=y
 CONFIG_SYS_MEMTEST_START=0x71000000
 CONFIG_SYS_MEMTEST_END=0xb0000000
 CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
@@ -54,7 +57,8 @@ CONFIG_MMC_DW=y
 CONFIG_PINCTRL=y
 CONFIG_DM_PMIC=y
 CONFIG_DM_REGULATOR=y
-CONFIG_CONS_INDEX=0
+CONFIG_DEBUG_UART_PL011=y
+CONFIG_DEBUG_UART_SKIP_INIT=y
 CONFIG_VIDEO=y
 CONFIG_VIDEO_LOGO=y
 CONFIG_DISPLAY=y

include/configs/s5p4418_nanopi2.h

@@ -76,11 +76,9 @@
 /*-----------------------------------------------------------------------
  * serial console configuration
  */
-#define CFG_PL011_CLOCK		50000000
+
-#define CFG_PL01x_PORTS		{(void *)PHY_BASEADDR_UART0, \
+/* 150MHz is the clock rate set by SPL (uart0) */
-					 (void *)PHY_BASEADDR_UART1, \
+#define CFG_PL011_CLOCK		150000000
-					 (void *)PHY_BASEADDR_UART2, \
-					 (void *)PHY_BASEADDR_UART3}
 
 /*-----------------------------------------------------------------------
  * BACKLIGHT