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| author | Bibek Basu <bbasu@nvidia.com> | 2016-08-11 16:28:28 -0600 |
|---|---|---|
| committer | Tom Warren <twarren@nvidia.com> | 2016-08-15 10:26:14 -0700 |
| commit | b064c9124acddbcdc70843f62fda13a2d7d7a392 (patch) | |
| tree | b54a420cf982cbee21b87ae5c94b669a89726ecc | |
| parent | 027638d3cf6bf55996b50e41faccd51789a04eb0 (diff) | |
| download | u-boot-imx-b064c9124acddbcdc70843f62fda13a2d7d7a392.zip u-boot-imx-b064c9124acddbcdc70843f62fda13a2d7d7a392.tar.gz u-boot-imx-b064c9124acddbcdc70843f62fda13a2d7d7a392.tar.bz2 | |
ARM: tegra: set vdd_core for Jetson TK1
Program vdd_core for Jetson TK1 to 1V, which is the max safe voltage for
ultra low temperature operations. vdd_cpu and vdd_gpu are already at 1V.
Signed-off-by: Bibek Basu <bbasu@nvidia.com>
(swarren: fixed comments to better match the code)
(swarren: moved board ifdef around data in header, made code generic)
(swarren: fixed typos in commit description)
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
| -rw-r--r-- | board/nvidia/venice2/as3722_init.c | 13 | ||||
| -rw-r--r-- | board/nvidia/venice2/as3722_init.h | 4 |
2 files changed, 15 insertions, 2 deletions
diff --git a/board/nvidia/venice2/as3722_init.c b/board/nvidia/venice2/as3722_init.c index 960fea7..1770ec2 100644 --- a/board/nvidia/venice2/as3722_init.c +++ b/board/nvidia/venice2/as3722_init.c @@ -32,7 +32,18 @@ void pmic_enable_cpu_vdd(void) { debug("%s entry\n", __func__); - /* Don't need to set up VDD_CORE - already done - by OTP */ +#ifdef AS3722_SD1VOLTAGE_DATA + /* Set up VDD_CORE, for boards where OTP is incorrect*/ + debug("%s: Setting VDD_CORE via AS3722 reg 1\n", __func__); + /* Configure VDD_CORE via the AS3722 PMIC on the PWR I2C bus */ + tegra_i2c_ll_write_addr(AS3722_I2C_ADDR, 2); + tegra_i2c_ll_write_data(AS3722_SD1VOLTAGE_DATA, I2C_SEND_2_BYTES); + /* + * Don't write SDCONTROL - it's already 0x7F, i.e. all SDs enabled. + * tegra_i2c_ll_write_data(AS3722_SD1CONTROL_DATA, I2C_SEND_2_BYTES); + */ + udelay(10 * 1000); +#endif debug("%s: Setting VDD_CPU to 1.0V via AS3722 reg 0/4D\n", __func__); /* diff --git a/board/nvidia/venice2/as3722_init.h b/board/nvidia/venice2/as3722_init.h index 992b11f..c6b1247 100644 --- a/board/nvidia/venice2/as3722_init.h +++ b/board/nvidia/venice2/as3722_init.h @@ -25,8 +25,10 @@ #endif #define AS3722_SD0CONTROL_DATA (0x0100 | AS3722_SDCONTROL_REG) -#define AS3722_SD1VOLTAGE_DATA (0x3200 | AS3722_SD1VOLTAGE_REG) +#ifdef CONFIG_TARGET_JETSON_TK1 +#define AS3722_SD1VOLTAGE_DATA (0x2800 | AS3722_SD1VOLTAGE_REG) #define AS3722_SD1CONTROL_DATA (0x0200 | AS3722_SDCONTROL_REG) +#endif #define AS3722_SD6CONTROL_DATA (0x4000 | AS3722_SDCONTROL_REG) #define AS3722_SD6VOLTAGE_DATA (0x2800 | AS3722_SD6VOLTAGE_REG) |