da850evm: Move LPSC configuration to board_early_init_f()

Since commit f1d2b313c9 the serial
port of the da850evm is accessed before the UART2 peripheral of
the SoC is powered on in the function board_init() in
board/davinci/da8xxevm/da850evm.c.

When u-boot is used in conjunction with the UBL (user boot loader, see
doc/README.davinci) on this board, the UART2 peripheral is already
turned on by UBL at the time u-boot is started. Hence, the wrong
initialization sequence is not noticed by most users. However, if UBL is not
used, u-boot must power on the peripheral before using it.

This patch adds a board_early_init_f() function for the LPSC
configuration to the da850evm board configuration.

Signed-off-by: Christian Riesch <christian.riesch@omicron.at>
Cc: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Cc: Sandeep Paulraj <s-paulraj@ti.com>
Cc: Heiko Schocher <hs@denx.de>
Cc: Ben Gardiner <bengardiner@nanometrics.ca>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

board/davinci/da8xxevm/da850evm.c

@@ -278,6 +278,20 @@ u32 get_board_rev(void)
 	return rev;
 }
 
+int board_early_init_f(void)
+{
+	/*
+	 * Power on required peripherals
+	 * ARM does not have access by default to PSC0 and PSC1
+	 * assuming here that the DSP bootloader has set the IOPU
+	 * such that PSC access is available to ARM
+	 */
+	if (da8xx_configure_lpsc_items(lpsc, ARRAY_SIZE(lpsc)))
+		return 1;
+
+	return 0;
+}
+
 int board_init(void)
 {
 #ifdef CONFIG_USE_NOR
@@ -310,15 +324,6 @@ int board_init(void)
 	/* address of boot parameters */
 	gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
 
-	/*
-	 * Power on required peripherals
-	 * ARM does not have access by default to PSC0 and PSC1
-	 * assuming here that the DSP bootloader has set the IOPU
-	 * such that PSC access is available to ARM
-	 */
-	if (da8xx_configure_lpsc_items(lpsc, ARRAY_SIZE(lpsc)))
-		return 1;
-
 	/* setup the SUSPSRC for ARM to control emulation suspend */
 	writel(readl(&davinci_syscfg_regs->suspsrc) &
 	       ~(DAVINCI_SYSCFG_SUSPSRC_EMAC | DAVINCI_SYSCFG_SUSPSRC_I2C |

include/configs/da850evm.h

@@ -160,6 +160,7 @@
  * U-Boot general configuration
  */
 #define CONFIG_MISC_INIT_R
+#define CONFIG_BOARD_EARLY_INIT_F
 #define CONFIG_BOOTFILE		"uImage" /* Boot file name */
 #define CONFIG_SYS_PROMPT	"U-Boot > " /* Command Prompt */
 #define CONFIG_SYS_CBSIZE	1024 /* Console I/O Buffer Size	*/