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ARM: k2g: Define embedded_dtb_select for runtime DTB selection in U-boot

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For K2G, runtime DTB selection utilizes the embedded_dtb_select function.
Therefore, define the function which will perform a EEPROM read and then
retries selecting the correct dtb now that it can detect which board its
on. For other Keystone devices use an empty function since they will still
use the embedded FIT functionality but their FIT will only contain a single
dtb.

Most production K2G boards do not have their EEPROM programmed. Therefore,
perform a test to verify a K2G GP is currently being used and if it is then
set the values normally set by a EEPROM read.

Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Cooper Jr., Franklin 2017-06-16 17:25:15 -05:00 committed by Tom Rini
parent 85bfe48b0a
commit 5f48da9a98
2 changed files with 45 additions and 0 deletions
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7
board/ti/ks2_evm/board.c
View File

@ -277,3 +277,10 @@ void ft_board_setup_ex(void *blob, bd_t *bd)
ddr3_check_ecc_int(KS2_DDR3A_EMIF_CTRL_BASE);
}
#endif /* CONFIG_OF_BOARD_SETUP */
#if defined(CONFIG_DTB_RESELECT)
int __weak embedded_dtb_select(void)
{
return 0;
}
#endif

38
board/ti/ks2_evm/board_k2g.c
View File

@ -11,9 +11,13 @@
#include <asm/ti-common/keystone_net.h>
#include <asm/arch/psc_defs.h>
#include <asm/arch/mmc_host_def.h>
#include <fdtdec.h>
#include <i2c.h>
#include "mux-k2g.h"
#include "../common/board_detect.h"
#define K2G_GP_AUDIO_CODEC_ADDRESS 0x1B
const unsigned int sysclk_array[MAX_SYSCLK] = {
19200000,
24000000,
@ -210,6 +214,40 @@ int board_mmc_init(bd_t *bis)
}
#endif
#if defined(CONFIG_DTB_RESELECT)
static int k2g_alt_board_detect(void)
{
int rc;
rc = i2c_set_bus_num(1);
if (rc)
return rc;
rc = i2c_probe(K2G_GP_AUDIO_CODEC_ADDRESS);
if (rc)
return rc;
ti_i2c_eeprom_am_set("66AK2GGP", "1.0X");
return 0;
}
int embedded_dtb_select(void)
{
int rc;
rc = k2g_alt_board_detect();
if (rc) {
printf("Unable to do board detection\n");
return -1;
}
fdtdec_setup();
return 0;
}
#endif
#ifdef CONFIG_BOARD_EARLY_INIT_F
static void k2g_reset_mux_config(void)