diff options
Diffstat (limited to 'arch/arm/mach-tegra/board-colibri_t20-power.c')
| -rw-r--r-- | arch/arm/mach-tegra/board-colibri_t20-power.c | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/board-colibri_t20-power.c b/arch/arm/mach-tegra/board-colibri_t20-power.c new file mode 100644 index 000000000000..fb6e8e8e1bf3 --- /dev/null +++ b/arch/arm/mach-tegra/board-colibri_t20-power.c @@ -0,0 +1,287 @@ +/* + * Copyright (C) 2011 Toradex, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * 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 <linux/gpio.h> +#include <linux/i2c.h> +#include <linux/io.h> +#include <linux/mfd/tps6586x.h> +#include <linux/platform_device.h> +#include <linux/regulator/machine.h> + +#include <mach/iomap.h> +#include <mach/irqs.h> + +#include "board-colibri_t20.h" +#include "board.h" +#include "fuse.h" +#include "gpio-names.h" +#include "pm.h" + +#define PMC_CTRL 0x0 +#define PMC_CTRL_INTR_LOW (1 << 17) + +/* VDD_CORE_1.2V */ +static struct regulator_consumer_supply tps658621_sm0_supply[] = { + REGULATOR_SUPPLY("vdd_core", NULL), +}; + +/* VDD_CPU_1.0V */ +static struct regulator_consumer_supply tps658621_sm1_supply[] = { + REGULATOR_SUPPLY("vdd_cpu", NULL), +}; + +/* VDD_DDR2_1.8V, LAN AX88772B VCC18A_ and NAND K9K8G08U0B VCC */ +static struct regulator_consumer_supply tps658621_sm2_supply[] = { + REGULATOR_SUPPLY("vdd_sm2", NULL), +}; + +/* unused */ +static struct regulator_consumer_supply tps658621_ldo0_supply[] = { + REGULATOR_SUPPLY("vdd_ldo0", NULL), +}; + +/* AVDD_PLL_1.1V and +3.3V_ENABLE_N switching via FET: AVDD_AUDIO_S and +3.3V: +SMSC USB3340 VBAT, VDDIO +VCC_LAN +VDDIO_AUDIO +VDDIO_BB +VDDIO_LCD +VDDIO_NAND +VDDIO_SDIO +VDDIO_UART +VDDIO_VI */ +static struct regulator_consumer_supply tps658621_ldo1_supply[] = { + REGULATOR_SUPPLY("vdd_ldo1", NULL), + REGULATOR_SUPPLY("avdd_pll", NULL), +}; + +/* VDD_RTC_1.2V */ +static struct regulator_consumer_supply tps658621_ldo2_supply[] = { + REGULATOR_SUPPLY("vdd_ldo2", NULL), + REGULATOR_SUPPLY("vdd_rtc", NULL), + REGULATOR_SUPPLY("vdd_aon", NULL), +}; + +/* unused */ +static struct regulator_consumer_supply tps658621_ldo3_supply[] = { + REGULATOR_SUPPLY("vdd_ldo3", NULL), +}; + +/* VDDIO_SYS_1.8V and VDDIO_PMIC */ +static struct regulator_consumer_supply tps658621_ldo4_supply[] = { + REGULATOR_SUPPLY("vdd_ldo4", NULL), + REGULATOR_SUPPLY("avdd_osc", NULL), +}; + +/* +3.3V_USB switched via FET: AVDD_USB, + +3.3V_FUSE switched via FET on FUSE_EN# (PMIC GPIO3)*/ +static struct regulator_consumer_supply tps658621_ldo5_supply[] = { + REGULATOR_SUPPLY("vdd_ldo5", NULL), + REGULATOR_SUPPLY("avdd_usb", NULL), + REGULATOR_SUPPLY("avdd_usb_pll", NULL), + /* fuse via separate GPIO FET (FUSE_ENABLE_N) */ + REGULATOR_SUPPLY("vdd_fuse", NULL), +}; + +/* AVDD_VDAC_2.85V */ +static struct regulator_consumer_supply tps658621_ldo6_supply[] = { + /* Off after boot, needs to be explicitly turned on! */ + REGULATOR_SUPPLY("vdd_ldo6", NULL), + REGULATOR_SUPPLY("avdd_vdac", NULL), +}; + +/* AVDD_HDMI_3.3V */ +static struct regulator_consumer_supply tps658621_ldo7_supply[] = { + REGULATOR_SUPPLY("vdd_ldo7", NULL), + REGULATOR_SUPPLY("avdd_hdmi", NULL), +}; + +/* AVDD_HDMI_PLL_1.8V */ +static struct regulator_consumer_supply tps658621_ldo8_supply[] = { + REGULATOR_SUPPLY("vdd_ldo8", NULL), + REGULATOR_SUPPLY("avdd_hdmi_pll", NULL), +}; + +/* VDDIO_RX_DDR_2.85V */ +static struct regulator_consumer_supply tps658621_ldo9_supply[] = { + REGULATOR_SUPPLY("vdd_ldo9", NULL), + REGULATOR_SUPPLY("vdd_ddr_rx", NULL), +}; + +static struct tps6586x_settings sm0_config = { + .sm_pwm_mode = PWM_DEFAULT_VALUE, + .slew_rate = SLEW_RATE_3520UV_PER_SEC, +}; + +static struct tps6586x_settings sm1_config = { + /* + * Current TPS6586x is known for having a voltage glitch if current load + * changes from low to high in auto PWM/PFM mode for CPU's Vdd line. + */ + .sm_pwm_mode = PWM_ONLY, + .slew_rate = SLEW_RATE_3520UV_PER_SEC, +}; + +#define REGULATOR_INIT(_id, _minmv, _maxmv, on, config) \ + { \ + .constraints = { \ + .min_uV = (_minmv)*1000, \ + .max_uV = (_maxmv)*1000, \ + .valid_modes_mask = (REGULATOR_MODE_NORMAL | \ + REGULATOR_MODE_STANDBY), \ + .valid_ops_mask = (REGULATOR_CHANGE_MODE | \ + REGULATOR_CHANGE_STATUS | \ + REGULATOR_CHANGE_VOLTAGE), \ + .always_on = on, \ + .apply_uV = 1, \ + }, \ + .num_consumer_supplies = ARRAY_SIZE(tps658621_##_id##_supply),\ + .consumer_supplies = tps658621_##_id##_supply, \ + .driver_data = config, \ + } + +#define ON 1 +#define OFF 0 + +static struct regulator_init_data sm0_data = REGULATOR_INIT(sm0, 725, 1500, ON, &sm0_config); +static struct regulator_init_data sm1_data = REGULATOR_INIT(sm1, 725, 1500, ON, &sm1_config); +static struct regulator_init_data sm2_data = REGULATOR_INIT(sm2, 1700, 2475, ON, NULL); +static struct regulator_init_data ldo0_data = REGULATOR_INIT(ldo0, 1200, 3300, OFF, NULL); +static struct regulator_init_data ldo1_data = REGULATOR_INIT(ldo1, 725, 1500, ON, NULL); +static struct regulator_init_data ldo2_data = REGULATOR_INIT(ldo2, 725, 1500, OFF, NULL); +static struct regulator_init_data ldo3_data = REGULATOR_INIT(ldo3, 1250, 3300, OFF, NULL); +static struct regulator_init_data ldo4_data = REGULATOR_INIT(ldo4, 1700, 2475, ON, NULL); +static struct regulator_init_data ldo5_data = REGULATOR_INIT(ldo5, 1250, 3300, ON, NULL); +static struct regulator_init_data ldo6_data = REGULATOR_INIT(ldo6, 2850, 2850, OFF, NULL); +static struct regulator_init_data ldo7_data = REGULATOR_INIT(ldo7, 3300, 3300, OFF, NULL); +static struct regulator_init_data ldo8_data = REGULATOR_INIT(ldo8, 1800, 1800, OFF, NULL); +static struct regulator_init_data ldo9_data = REGULATOR_INIT(ldo9, 1250, 3300, OFF, NULL); + +static struct tps6586x_rtc_platform_data rtc_data = { + .irq = TEGRA_NR_IRQS + TPS6586X_INT_RTC_ALM1, + .start = { + .year = 2009, + .month = 1, + .day = 1, + }, + .cl_sel = TPS6586X_RTC_CL_SEL_1_5PF /* use lowest (external 20pF cap) */ +}; + +#define TPS_REG(_id, _data) \ + { \ + .id = TPS6586X_ID_##_id, \ + .name = "tps6586x-regulator", \ + .platform_data = _data, \ + } + +static struct tps6586x_subdev_info tps_devs[] = { + TPS_REG(SM_0, &sm0_data), + TPS_REG(SM_1, &sm1_data), + TPS_REG(SM_2, &sm2_data), + TPS_REG(LDO_0, &ldo0_data), + TPS_REG(LDO_1, &ldo1_data), + TPS_REG(LDO_2, &ldo2_data), + TPS_REG(LDO_3, &ldo3_data), + TPS_REG(LDO_4, &ldo4_data), + TPS_REG(LDO_5, &ldo5_data), + TPS_REG(LDO_6, &ldo6_data), + TPS_REG(LDO_7, &ldo7_data), + TPS_REG(LDO_8, &ldo8_data), + TPS_REG(LDO_9, &ldo9_data), + { + .id = 0, + .name = "tps6586x-rtc", + .platform_data = &rtc_data, + }, +}; + +static struct tps6586x_platform_data tps_platform = { + .irq_base = TPS6586X_INT_BASE, + .num_subdevs = ARRAY_SIZE(tps_devs), + .subdevs = tps_devs, + .gpio_base = TPS6586X_GPIO_BASE, + /* full PMIC power off decreases power consumption + but reset won't force a re-boot anymore */ + .use_power_off = true, +}; + +static struct i2c_board_info __initdata colibri_t20_regulators[] = { + { + I2C_BOARD_INFO("tps6586x", 0x34), + .irq = INT_EXTERNAL_PMU, + .platform_data = &tps_platform, + }, +}; + +static void colibri_t20_board_suspend(int lp_state, enum suspend_stage stg) +{ + if ((lp_state == TEGRA_SUSPEND_LP1) && (stg == TEGRA_SUSPEND_BEFORE_CPU)) + tegra_console_uart_suspend(); +} + +static void colibri_t20_board_resume(int lp_state, enum resume_stage stg) +{ + if ((lp_state == TEGRA_SUSPEND_LP1) && (stg == TEGRA_RESUME_AFTER_CPU)) + tegra_console_uart_resume(); +} + +static struct tegra_suspend_platform_data colibri_t20_suspend_data = { + /* + * Check power on time and crystal oscillator start time + * for appropriate settings. + */ + .cpu_timer = 2000, + .cpu_off_timer = 100, + .suspend_mode = TEGRA_SUSPEND_LP1, + .core_timer = 0x7e7e, + .core_off_timer = 0xf, + .corereq_high = false, + .sysclkreq_high = true, + .board_suspend = colibri_t20_board_suspend, + .board_resume = colibri_t20_board_resume, +}; + +int __init colibri_t20_regulator_init(void) +{ + void __iomem *pmc = IO_ADDRESS(TEGRA_PMC_BASE); + u32 pmc_ctrl; +#if 0 +//currently LP0 is anyway not supported + void __iomem *chip_id = IO_ADDRESS(TEGRA_APB_MISC_BASE) + 0x804; + u32 minor; + + minor = (readl(chip_id) >> 16) & 0xf; + /* A03 (but not A03p) chips do not support LP0 */ + if (minor == 3 && !(tegra_spare_fuse(18) || tegra_spare_fuse(19))) + colibri_t20_suspend_data.suspend_mode = TEGRA_SUSPEND_LP1; +#endif + + /* configure the power management controller to trigger PMU + * interrupts when low */ + pmc_ctrl = readl(pmc + PMC_CTRL); + writel(pmc_ctrl | PMC_CTRL_INTR_LOW, pmc + PMC_CTRL); + + i2c_register_board_info(4, colibri_t20_regulators, ARRAY_SIZE(colibri_t20_regulators)); + +//none of the Tegra 2 boards currently do this +// regulator_has_full_constraints(); + + tegra_init_suspend(&colibri_t20_suspend_data); + + return 0; +} |