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authorYing Zhang <b40530@freescale.com>2014-10-31 18:06:18 +0800
committerYork Sun <yorksun@freescale.com>2014-12-05 08:06:09 -0800
commit3ad2737ee3faa291f75176b667ac3ad4408b023d (patch)
treeae8af89395aeb105fc38d7a1f06f7740b754d789 /board/freescale/t208xqds
parente7f533cd5972d762e0544a38c74fce495a9d9d2f (diff)
powerpc/t208xqds: VID support
The fuse status register provides the values from on-chip voltage ID efuses programmed at the factory. These values define the voltage requirements for the chip. u-boot reads FUSESR and translates the values into the appropriate commands to set the voltage output value of an external voltage regulator. Signed-off-by: Ying Zhang <b40530@freescale.com> Reviewed-by: York Sun <yorksun@freescale.com>
Diffstat (limited to 'board/freescale/t208xqds')
-rw-r--r--board/freescale/t208xqds/t208xqds.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/board/freescale/t208xqds/t208xqds.c b/board/freescale/t208xqds/t208xqds.c
index 5c470c3a497..7c89cd5ee9a 100644
--- a/board/freescale/t208xqds/t208xqds.c
+++ b/board/freescale/t208xqds/t208xqds.c
@@ -20,6 +20,7 @@
#include "../common/qixis.h"
#include "../common/vsc3316_3308.h"
+#include "../common/vid.h"
#include "t208xqds.h"
#include "t208xqds_qixis.h"
@@ -86,6 +87,11 @@ int select_i2c_ch_pca9547(u8 ch)
return 0;
}
+int i2c_multiplexer_select_vid_channel(u8 channel)
+{
+ return select_i2c_ch_pca9547(channel);
+}
+
int brd_mux_lane_to_slot(void)
{
ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
@@ -358,6 +364,13 @@ int board_early_init_r(void)
/* Disable remote I2C connection to qixis fpga */
QIXIS_WRITE(brdcfg[5], QIXIS_READ(brdcfg[5]) & ~BRDCFG5_IRE);
+ /*
+ * Adjust core voltage according to voltage ID
+ * This function changes I2C mux to channel 2.
+ */
+ if (adjust_vdd(0))
+ printf("Warning: Adjusting core voltage failed.\n");
+
brd_mux_lane_to_slot();
select_i2c_ch_pca9547(I2C_MUX_CH_DEFAULT);