From 00a2749d7be5b0e6cb6435187ec8fea600b44627 Mon Sep 17 00:00:00 2001 From: Allen Martin Date: Fri, 31 Aug 2012 08:30:00 +0000 Subject: tegra20: rename tegra2 -> tegra20 This is make naming consistent with the kernel and devicetree and in preparation of pulling out the common tegra20 code. Signed-off-by: Allen Martin Acked-by: Stephen Warren Tested-by: Thierry Reding Signed-off-by: Tom Warren --- arch/arm/cpu/armv7/tegra20/pmu.c | 70 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 arch/arm/cpu/armv7/tegra20/pmu.c (limited to 'arch/arm/cpu/armv7/tegra20/pmu.c') diff --git a/arch/arm/cpu/armv7/tegra20/pmu.c b/arch/arm/cpu/armv7/tegra20/pmu.c new file mode 100644 index 0000000000..53505e9c50 --- /dev/null +++ b/arch/arm/cpu/armv7/tegra20/pmu.c @@ -0,0 +1,70 @@ +/* + * Copyright (c) 2011 The Chromium OS Authors. + * (C) Copyright 2010,2011 NVIDIA Corporation + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include +#include +#include +#include +#include +#include +#include + +#define VDD_CORE_NOMINAL_T25 0x17 /* 1.3v */ +#define VDD_CPU_NOMINAL_T25 0x10 /* 1.125v */ + +#define VDD_CORE_NOMINAL_T20 0x16 /* 1.275v */ +#define VDD_CPU_NOMINAL_T20 0x0f /* 1.1v */ + +#define VDD_RELATION 0x02 /* 50mv */ +#define VDD_TRANSITION_STEP 0x06 /* 150mv */ +#define VDD_TRANSITION_RATE 0x06 /* 3.52mv/us */ + +int pmu_set_nominal(void) +{ + int core, cpu, bus; + + /* by default, the table has been filled with T25 settings */ + switch (tegra_get_chip_type()) { + case TEGRA_SOC_T20: + core = VDD_CORE_NOMINAL_T20; + cpu = VDD_CPU_NOMINAL_T20; + break; + case TEGRA_SOC_T25: + core = VDD_CORE_NOMINAL_T25; + cpu = VDD_CPU_NOMINAL_T25; + break; + default: + debug("%s: Unknown chip type\n", __func__); + return -1; + } + + bus = tegra_i2c_get_dvc_bus_num(); + if (bus == -1) { + debug("%s: Cannot find DVC I2C bus\n", __func__); + return -1; + } + tps6586x_init(bus); + tps6586x_set_pwm_mode(TPS6586X_PWM_SM1); + return tps6586x_adjust_sm0_sm1(core, cpu, VDD_TRANSITION_STEP, + VDD_TRANSITION_RATE, VDD_RELATION); +} -- cgit v1.2.1