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da850evm: Move LPSC configuration to board_early_init_f()

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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. 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>
This commit is contained in:
Christian Riesch 2011-10-13 00:52:29 +00:00 committed by Albert ARIBAUD
parent 3b413c5bfa
commit ae5c77dd90
2 changed files with 15 additions and 9 deletions
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23
board/davinci/da8xxevm/da850evm.c
View File

@ -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 |

1
include/configs/da850evm.h
View File

@ -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 */