Since commit f1d2b313c9eb6808d30c16a9eb5251240452a56c 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. 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.rie...@omicron.at>
Cc: Sudhakar Rajashekhara <sudhakar....@ti.com>
Cc: Sandeep Paulraj <s-paul...@ti.com>
Cc: Heiko Schocher <h...@denx.de>
Cc: Ben Gardiner <bengardi...@nanometrics.ca>
---
In my first submission of this patch I forgot to cc Sudhakar Rajashekhara
as the board's maintainer. Sorry! Thank you for your comments!
Best regards, Christian
board/davinci/da8xxevm/da850evm.c | 23 ++++++++++++++---------
include/configs/da850evm.h | 1 +
2 files changed, 15 insertions(+), 9 deletions(-)
diff --git a/board/davinci/da8xxevm/da850evm.c
b/board/davinci/da8xxevm/da850evm.c
index 73eaa48..11ad88d 100644
--- a/board/davinci/da8xxevm/da850evm.c
+++ b/board/davinci/da8xxevm/da850evm.c
@@ -166,6 +166,20 @@ 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)
{
#ifndef CONFIG_USE_IRQ
@@ -195,15 +209,6 @@ 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 |
diff --git a/include/configs/da850evm.h b/include/configs/da850evm.h
index bbb5a9b..5d0f5bf 100644
--- a/include/configs/da850evm.h
+++ b/include/configs/da850evm.h
@@ -42,6 +42,7 @@
#define CONFIG_SYS_HZ 1000
#define CONFIG_SKIP_LOWLEVEL_INIT
#define CONFIG_SYS_TEXT_BASE 0xc1080000
+#define CONFIG_BOARD_EARLY_INIT_F
/*
* Memory Info
--
1.7.0.4
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