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ls1021aqds: set the default I2C channel before DDR init

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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;