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Surface RT is a hybrid tablet computer developed and manufactured by Microsoft and shipped with Windows RT. The tablet uses a 1.3 GHz quad-core Nvidia Tegra 3 chipset with 2 GB of RAM, features 10.8 inch 1366x768 screen and 32/64 GB of internal memory that can be supplemented with a microSDXC card giving up to 200 GB of additional storage. Tested-by: Jethro Bull <jethrob@hotmail.com> Signed-off-by: Jonas Schwöbel <jonasschwoebel@yahoo.de> Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Surface RT SPL stage configuration
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*
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* (C) Copyright 2010-2013
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* NVIDIA Corporation <www.nvidia.com>
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*
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* (C) Copyright 2021
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* Svyatoslav Ryhel <clamor95@gmail.com>
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*/
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#include <asm/arch/tegra.h>
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#include <asm/arch-tegra/tegra_i2c.h>
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#include <linux/delay.h>
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#define TPS65911_I2C_ADDR (0x2D << 1)
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#define TPS65911_VDDCTRL_OP_REG 0x28
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#define TPS65911_VDDCTRL_SR_REG 0x27
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#define TPS65911_VDDCTRL_OP_DATA (0x2400 | TPS65911_VDDCTRL_OP_REG)
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#define TPS65911_VDDCTRL_SR_DATA (0x0100 | TPS65911_VDDCTRL_SR_REG)
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#define TPS62361B_I2C_ADDR (0x60 << 1)
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#define TPS62361B_SET3_REG 0x03
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#define TPS62361B_SET3_DATA (0x4600 | TPS62361B_SET3_REG)
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void pmic_enable_cpu_vdd(void)
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{
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/* Set VDD_CORE to 1.200V. */
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tegra_i2c_ll_write(TPS62361B_I2C_ADDR, TPS62361B_SET3_DATA);
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udelay(1000);
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/*
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* Bring up CPU VDD via the TPS65911x PMIC on the DVC I2C bus.
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* First set VDD to 1.0125V, then enable the VDD regulator.
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*/
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tegra_i2c_ll_write(TPS65911_I2C_ADDR, TPS65911_VDDCTRL_OP_DATA);
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udelay(1000);
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tegra_i2c_ll_write(TPS65911_I2C_ADDR, TPS65911_VDDCTRL_SR_DATA);
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udelay(10 * 1000);
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}
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