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ls1021aqds: set the default I2C channel before DDR init 

When resuming from deep sleep, the I2C channel may not be
in the default channel. So, switch to the default channel
before accessing DDR SPD.

Signed-off-by: Chenhui Zhao <chenhui.zhao@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
This commit is contained in:
Chenhui Zhao 2014-11-06 10:51:59 +08:00 committed by York Sun
parent da419027af
commit afff13790e
1 changed files with 19 additions and 13 deletions
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32
board/freescale/ls1021aqds/ls1021aqds.c
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@ -102,8 +102,27 @@ unsigned long get_board_ddr_clk(void)
return 66666666;
}
int select_i2c_ch_pca9547(u8 ch)
{
int ret;
ret = i2c_write(I2C_MUX_PCA_ADDR_PRI, 0, 1, &ch, 1);
if (ret) {
puts("PCA: failed to select proper channel\n");
return ret;
}
return 0;
}
int dram_init(void)
{
/*
* When resuming from deep sleep, the I2C channel may not be
* in the default channel. So, switch to the default channel
* before accessing DDR SPD.
*/
select_i2c_ch_pca9547(I2C_MUX_CH_DEFAULT);
gd->ram_size = initdram(0);
return 0;
@ -122,19 +141,6 @@ int board_mmc_init(bd_t *bis)
}
#endif
int select_i2c_ch_pca9547(u8 ch)
{
int ret;
ret = i2c_write(I2C_MUX_PCA_ADDR_PRI, 0, 1, &ch, 1);
if (ret) {
puts("PCA: failed to select proper channel\n");
return ret;
}
return 0;
}
int board_early_init_f(void)
{
struct ccsr_scfg *scfg = (struct ccsr_scfg *)CONFIG_SYS_FSL_SCFG_ADDR;