board: asus: transformer: add ASUS Transformer T30 family support
The ASUS Transformer T30 family are 2-in-1 detachable tablets
and AiO developed by ASUS that run the Android operating system
(TF600T runs Windows RT and P1801-T runs Android and Windows).
The T30 Transformers feature a 10.1-inch display (apart P1801-T),
an Nvidia Tegra 3 quad-core chip, 1/2 GB of RAM, and 16/32 GB of
storage. Transformers board derives from Nvidia Cardhu development
board.
This patch brings support for 7 known Transformer devices:
- ASUS Transformer Prime TF201
- ASUS Transformer Pad TF300T/TF300TG/TF300TL
- ASUS VivoTab RT TF600T (Windows RT based)
- ASUS Transformer Infinity TF700T
- ASUS Portable AiO P1801-T
Tested-by: Andreas Westman Dorcsak <hedmoo@yahoo.com> # all devices
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
diff --git a/board/asus/transformer-t30/transformer-t30-spl.c b/board/asus/transformer-t30/transformer-t30-spl.c
new file mode 100644
index 0000000..89819b2
--- /dev/null
+++ b/board/asus/transformer-t30/transformer-t30-spl.c
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * T30 Transformers SPL stage configuration
+ *
+ * (C) Copyright 2010-2013
+ * NVIDIA Corporation <www.nvidia.com>
+ *
+ * (C) Copyright 2021
+ * Svyatoslav Ryhel <clamor95@gmail.com>
+ */
+
+#include <common.h>
+#include <asm/arch-tegra/tegra_i2c.h>
+#include <linux/delay.h>
+
+#define TPS65911_I2C_ADDR (0x2D << 1)
+#define TPS65911_VDDCTRL_OP_REG 0x28
+#define TPS65911_VDDCTRL_SR_REG 0x27
+#define TPS65911_VDDCTRL_OP_DATA (0x2400 | TPS65911_VDDCTRL_OP_REG)
+#define TPS65911_VDDCTRL_SR_DATA (0x0100 | TPS65911_VDDCTRL_SR_REG)
+
+#define TPS62361B_I2C_ADDR (0x60 << 1)
+#define TPS62361B_SET3_REG 0x03
+#define TPS62361B_SET3_DATA (0x4600 | TPS62361B_SET3_REG)
+
+void pmic_enable_cpu_vdd(void)
+{
+ /* Set VDD_CORE to 1.200V. */
+ tegra_i2c_ll_write(TPS62361B_I2C_ADDR, TPS62361B_SET3_DATA);
+
+ udelay(1000);
+
+ /*
+ * Bring up CPU VDD via the TPS65911x PMIC on the DVC I2C bus.
+ * First set VDD to 1.0125V, then enable the VDD regulator.
+ */
+ tegra_i2c_ll_write(TPS65911_I2C_ADDR, TPS65911_VDDCTRL_OP_DATA);
+ udelay(1000);
+ tegra_i2c_ll_write(TPS65911_I2C_ADDR, TPS65911_VDDCTRL_SR_DATA);
+ udelay(10 * 1000);
+}