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authorBibek Basu <bbasu@nvidia.com>2016-08-11 16:28:28 -0600
committerTom Warren <twarren@nvidia.com>2016-08-15 10:26:14 -0700
commitb064c9124acddbcdc70843f62fda13a2d7d7a392 (patch)
treeb54a420cf982cbee21b87ae5c94b669a89726ecc /board
parent027638d3cf6bf55996b50e41faccd51789a04eb0 (diff)
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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>
Diffstat (limited to 'board')
-rw-r--r--board/nvidia/venice2/as3722_init.c13
-rw-r--r--board/nvidia/venice2/as3722_init.h4
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)