board: asus: grouper: add Google Nexus 7 (2012) support
Nexus 7 is a mini tablet computer co-developed by Google and Asus
that runs the Android operating system. The Nexus 7 features a 7"
display, an Nvidia Tegra 3 quad-core chip, 1 GB of RAM and 8/16 GB
of internal storage.
This patch brings support for all 3 known ASUS/Google devices:
- Nexus 7 (2012) E1565
- Nexus 7 (2012) PM269
- Nexus 7 (2012) 3G - tilapia
Tested-by: Andreas Westman Dorcsak <hedmoo@yahoo.com> # ASUS Grouper E1565
Tested-by: Svyatoslav Ryhel <clamor95@gmail.com> # ASUS Grouper E1565
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
diff --git a/board/asus/grouper/grouper-spl-max.c b/board/asus/grouper/grouper-spl-max.c
new file mode 100644
index 0000000..8443837
--- /dev/null
+++ b/board/asus/grouper/grouper-spl-max.c
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * T30 Grouper MAX SPL stage configuration
+ *
+ * (C) Copyright 2010-2013
+ * NVIDIA Corporation <www.nvidia.com>
+ *
+ * (C) Copyright 2022
+ * Svyatoslav Ryhel <clamor95@gmail.com>
+ */
+
+#include <common.h>
+#include <asm/arch-tegra/tegra_i2c.h>
+#include <linux/delay.h>
+
+#define MAX77663_I2C_ADDR (0x3C << 1)
+
+#define MAX77663_REG_SD0 0x16
+#define MAX77663_REG_SD0_DATA (0x2100 | MAX77663_REG_SD0)
+#define MAX77663_REG_SD1 0x17
+#define MAX77663_REG_SD1_DATA (0x3000 | MAX77663_REG_SD1)
+#define MAX77663_REG_LDO4 0x2B
+#define MAX77663_REG_LDO4_DATA (0xE000 | MAX77663_REG_LDO4)
+
+#define MAX77663_REG_GPIO4 0x3A
+#define MAX77663_REG_GPIO4_DATA (0x0100 | MAX77663_REG_GPIO4)
+
+void pmic_enable_cpu_vdd(void)
+{
+ /* Set VDD_CORE to 1.200V. */
+ tegra_i2c_ll_write(MAX77663_I2C_ADDR, MAX77663_REG_SD1_DATA);
+
+ udelay(1000);
+
+ /* Bring up VDD_CPU to 1.0125V. */
+ tegra_i2c_ll_write(MAX77663_I2C_ADDR, MAX77663_REG_SD0_DATA);
+ udelay(1000);
+
+ /* Bring up VDD_RTC to 1.200V. */
+ tegra_i2c_ll_write(MAX77663_I2C_ADDR, MAX77663_REG_LDO4_DATA);
+ udelay(10 * 1000);
+
+ /* Set 32k-out gpio state */
+ tegra_i2c_ll_write(MAX77663_I2C_ADDR, MAX77663_REG_GPIO4_DATA);
+}