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| author | Zhou Jingyu <b02241@freescale.com> | 2011-03-11 13:51:59 +0800 |
|---|---|---|
| committer | Zhou Jingyu <b02241@freescale.com> | 2011-03-23 09:59:37 +0800 |
| commit | 398b6f66eae95dc7b09980616ce324408cc16c97 (patch) | |
| tree | bd7b0956cebdffe531613d76702a670ee92ff043 /board/freescale | |
| parent | 33e33116c24f2c1468385142fb0eba2e777cf010 (diff) | |
| download | u-boot-imx-398b6f66eae95dc7b09980616ce324408cc16c97.zip u-boot-imx-398b6f66eae95dc7b09980616ce324408cc16c97.tar.gz u-boot-imx-398b6f66eae95dc7b09980616ce324408cc16c97.tar.bz2 | |
ENGR00140537 mx53: update vddgp according to new data sheet
mx53: update vddgp according to new data sheet
Signed-off-by: Zhou Jingyu <Jingyu.Zhou@freescale.com>
Diffstat (limited to 'board/freescale')
| -rwxr-xr-x | board/freescale/mx53_ard/mx53_ard.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/board/freescale/mx53_ard/mx53_ard.c b/board/freescale/mx53_ard/mx53_ard.c index 6803777..925bd2a 100755 --- a/board/freescale/mx53_ard/mx53_ard.c +++ b/board/freescale/mx53_ard/mx53_ard.c @@ -371,6 +371,38 @@ static void setup_i2c(unsigned int module_base) break; } } + +void setup_pmic_voltages(void) +{ + int value; + /* Increase VDDGP as 1.1v for 800MHZ + * Since VDDGP voltage is caculated via resistors, the actual + * voltage is only about 1.1v + */ + if (is_soc_rev(CHIP_REV_2_0) == 0) { + i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); + /* Update B2DTV1 */ + /* VCC = (1+R1/R2)*(0.3625 + B1DTV1*0.0125) + * = (1 + 100/180)*(0.3625 + 27*0.0125) + * = 1.1083V + */ + value |= 0x1C; + i2c_write(0x34, 0x23, 1, &value, 1); + /* Update VCCR */ + i2c_read(0x34, 0x20, 1, &value, 1); + value = (value & 0xfc) | 0x1; + i2c_write(0x34, 0x20, 1, &value, 1); + /* Update SCR1 */ + i2c_read(0x34, 0x12, 1, &value, 1); + value = (value & 0xfe) | 0x1; + i2c_write(0x34, 0x12, 1, &value, 1); + /* Update OVEN */ + i2c_read(0x34, 0x10, 1, &value, 1); + value = (value & 0xfe) | 0x1; + i2c_write(0x34, 0x10, 1, &value, 1); + udelay(10000); + } +} #endif #ifdef CONFIG_IMX_ECSPI @@ -983,6 +1015,7 @@ int board_init(void) #ifdef CONFIG_I2C_MXC setup_i2c(CONFIG_SYS_I2C_PORT); + setup_pmic_voltages(); #endif weim_smc911x_iomux(); |