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| author | Lily Zhang <r58066@freescale.com> | 2011-01-14 23:42:22 +0800 |
|---|---|---|
| committer | Lily Zhang <r58066@freescale.com> | 2011-01-15 00:01:19 +0800 |
| commit | e6ed124f273d9439f03a32bcdea064574c32c1d2 (patch) | |
| tree | bb55460763ab45c68498367f4873d5b1d5f0cb35 /board/freescale/mx53_smd | |
| parent | 0217e541efbcd63136ce6300f55515d454387751 (diff) | |
| download | u-boot-imx-e6ed124f273d9439f03a32bcdea064574c32c1d2.zip u-boot-imx-e6ed124f273d9439f03a32bcdea064574c32c1d2.tar.gz u-boot-imx-e6ed124f273d9439f03a32bcdea064574c32c1d2.tar.bz2 | |
ENGR00137552 MX53: increase VDDGP as 1.2V for 1GHZ
The norminal voltage of VDDGP for 1GHZ is 1.2V in MX53
TO2.0 datasheet (RevD). So set the CPU frequency
as 800MHZ firstly since VDDGP is 1.1V after power on.
After increasing VDDGP as 1.2V, increase CPU as 1GHZ.
Signed-off-by: Lily Zhang <r58066@freescale.com>
Diffstat (limited to 'board/freescale/mx53_smd')
| -rw-r--r-- | board/freescale/mx53_smd/lowlevel_init.S | 2 | ||||
| -rw-r--r-- | board/freescale/mx53_smd/mx53_smd.c | 14 |
2 files changed, 15 insertions, 1 deletions
diff --git a/board/freescale/mx53_smd/lowlevel_init.S b/board/freescale/mx53_smd/lowlevel_init.S index 5feaaf1..60ee843 100644 --- a/board/freescale/mx53_smd/lowlevel_init.S +++ b/board/freescale/mx53_smd/lowlevel_init.S @@ -97,7 +97,7 @@ mov r1, #0x4 str r1, [r0, #CLKCTL_CCSR] - setup_pll PLL1_BASE_ADDR, 1000 + setup_pll PLL1_BASE_ADDR, 800 setup_pll PLL3_BASE_ADDR, 400 diff --git a/board/freescale/mx53_smd/mx53_smd.c b/board/freescale/mx53_smd/mx53_smd.c index be1185f..1b44b3c 100644 --- a/board/freescale/mx53_smd/mx53_smd.c +++ b/board/freescale/mx53_smd/mx53_smd.c @@ -363,6 +363,16 @@ static void setup_i2c(unsigned int module_base) break; } } + +void setup_pmic_voltages(void) +{ + int value; + i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); + /* increase VDDGP as 1.2V for 1GHZ */ + value = 0x5c; + i2c_write(0x48, 0x2e, 1, &value, 1); +} + #endif #if defined(CONFIG_DWC_AHSATA) @@ -684,6 +694,10 @@ int board_init(void) #ifdef CONFIG_I2C_MXC setup_i2c(CONFIG_SYS_I2C_PORT); + /* Increase VDDGP voltage */ + setup_pmic_voltages(); + /* Switch to 1GHZ */ + clk_config(CONFIG_REF_CLK_FREQ, 1000, CPU_CLK); #endif #if defined(CONFIG_DWC_AHSATA) |