diff options
Diffstat (limited to 'drivers/acpi/pmic/intel_pmic_crc.c')
| -rw-r--r-- | drivers/acpi/pmic/intel_pmic_crc.c | 309 |
1 files changed, 309 insertions, 0 deletions
diff --git a/drivers/acpi/pmic/intel_pmic_crc.c b/drivers/acpi/pmic/intel_pmic_crc.c new file mode 100644 index 000000000..22c9e374c --- /dev/null +++ b/drivers/acpi/pmic/intel_pmic_crc.c @@ -0,0 +1,309 @@ +/* + * intel_pmic_crc.c - Intel CrystalCove PMIC operation region driver + * + * Copyright (C) 2014 Intel Corporation. All rights reserved. + * + * 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. + */ + +#include <linux/init.h> +#include <linux/acpi.h> +#include <linux/mfd/intel_soc_pmic.h> +#include <linux/regmap.h> +#include <linux/platform_device.h> +#include "intel_pmic.h" + +#define PWR_SOURCE_SELECT BIT(1) + +#define PMIC_A0LOCK_REG 0xc5 + +static struct pmic_table power_table[] = { +/* { + .address = 0x00, + .reg = ??, + .bit = ??, + }, ** VSYS */ + { + .address = 0x04, + .reg = 0x63, + .bit = 0x00, + }, /* SYSX -> VSYS_SX */ + { + .address = 0x08, + .reg = 0x62, + .bit = 0x00, + }, /* SYSU -> VSYS_U */ + { + .address = 0x0c, + .reg = 0x64, + .bit = 0x00, + }, /* SYSS -> VSYS_S */ + { + .address = 0x10, + .reg = 0x6a, + .bit = 0x00, + }, /* V50S -> V5P0S */ + { + .address = 0x14, + .reg = 0x6b, + .bit = 0x00, + }, /* HOST -> VHOST, USB2/3 host */ + { + .address = 0x18, + .reg = 0x6c, + .bit = 0x00, + }, /* VBUS -> VBUS, USB2/3 OTG */ + { + .address = 0x1c, + .reg = 0x6d, + .bit = 0x00, + }, /* HDMI -> VHDMI */ +/* { + .address = 0x20, + .reg = ??, + .bit = ??, + }, ** S285 */ + { + .address = 0x24, + .reg = 0x66, + .bit = 0x00, + }, /* X285 -> V2P85SX, camera */ +/* { + .address = 0x28, + .reg = ??, + .bit = ??, + }, ** V33A */ + { + .address = 0x2c, + .reg = 0x69, + .bit = 0x00, + }, /* V33S -> V3P3S, display/ssd/audio */ + { + .address = 0x30, + .reg = 0x68, + .bit = 0x00, + }, /* V33U -> V3P3U, SDIO wifi&bt */ +/* { + .address = 0x34 .. 0x40, + .reg = ??, + .bit = ??, + }, ** V33I, V18A, REFQ, V12A */ + { + .address = 0x44, + .reg = 0x5c, + .bit = 0x00, + }, /* V18S -> V1P8S, SOC/USB PHY/SIM */ + { + .address = 0x48, + .reg = 0x5d, + .bit = 0x00, + }, /* V18X -> V1P8SX, eMMC/camara/audio */ + { + .address = 0x4c, + .reg = 0x5b, + .bit = 0x00, + }, /* V18U -> V1P8U, LPDDR */ + { + .address = 0x50, + .reg = 0x61, + .bit = 0x00, + }, /* V12X -> V1P2SX, SOC SFR */ + { + .address = 0x54, + .reg = 0x60, + .bit = 0x00, + }, /* V12S -> V1P2S, MIPI */ +/* { + .address = 0x58, + .reg = ??, + .bit = ??, + }, ** V10A */ + { + .address = 0x5c, + .reg = 0x56, + .bit = 0x00, + }, /* V10S -> V1P0S, SOC GFX */ + { + .address = 0x60, + .reg = 0x57, + .bit = 0x00, + }, /* V10X -> V1P0SX, SOC display/DDR IO/PCIe */ + { + .address = 0x64, + .reg = 0x59, + .bit = 0x00, + }, /* V105 -> V1P05S, L2 SRAM */ +}; + +static struct pmic_table thermal_table[] = { + { + .address = 0x00, + .reg = 0x75 + }, + { + .address = 0x04, + .reg = 0x95 + }, + { + .address = 0x08, + .reg = 0x97 + }, + { + .address = 0x0c, + .reg = 0x77 + }, + { + .address = 0x10, + .reg = 0x9a + }, + { + .address = 0x14, + .reg = 0x9c + }, + { + .address = 0x18, + .reg = 0x79 + }, + { + .address = 0x1c, + .reg = 0x9f + }, + { + .address = 0x20, + .reg = 0xa1 + }, + { + .address = 0x48, + .reg = 0x94 + }, + { + .address = 0x4c, + .reg = 0x99 + }, + { + .address = 0x50, + .reg = 0x9e + }, +}; + +static int intel_crc_pmic_get_power(struct regmap *regmap, int reg, + int bit, u64 *value) +{ + int data; + + if (regmap_read(regmap, reg, &data)) + return -EIO; + + *value = (data & PWR_SOURCE_SELECT) && (data & BIT(bit)) ? 1 : 0; + return 0; +} + +static int intel_crc_pmic_update_power(struct regmap *regmap, int reg, + int bit, bool on) +{ + int data; + + if (regmap_read(regmap, reg, &data)) + return -EIO; + + if (on) { + data |= PWR_SOURCE_SELECT | BIT(bit); + } else { + data &= ~BIT(bit); + data |= PWR_SOURCE_SELECT; + } + + if (regmap_write(regmap, reg, data)) + return -EIO; + return 0; +} + +static int intel_crc_pmic_get_raw_temp(struct regmap *regmap, int reg) +{ + int temp_l, temp_h; + + /* + * Raw temperature value is 10bits: 8bits in reg + * and 2bits in reg-1: bit0,1 + */ + if (regmap_read(regmap, reg, &temp_l) || + regmap_read(regmap, reg - 1, &temp_h)) + return -EIO; + + return temp_l | (temp_h & 0x3) << 8; +} + +static int intel_crc_pmic_update_aux(struct regmap *regmap, int reg, int raw) +{ + return regmap_write(regmap, reg, raw) || + regmap_update_bits(regmap, reg - 1, 0x3, raw >> 8) ? -EIO : 0; +} + +static int intel_crc_pmic_get_policy(struct regmap *regmap, + int reg, int bit, u64 *value) +{ + int pen; + + if (regmap_read(regmap, reg, &pen)) + return -EIO; + *value = pen >> 7; + return 0; +} + +static int intel_crc_pmic_update_policy(struct regmap *regmap, + int reg, int bit, int enable) +{ + int alert0; + + /* Update to policy enable bit requires unlocking a0lock */ + if (regmap_read(regmap, PMIC_A0LOCK_REG, &alert0)) + return -EIO; + + if (regmap_update_bits(regmap, PMIC_A0LOCK_REG, 0x01, 0)) + return -EIO; + + if (regmap_update_bits(regmap, reg, 0x80, enable << 7)) + return -EIO; + + /* restore alert0 */ + if (regmap_write(regmap, PMIC_A0LOCK_REG, alert0)) + return -EIO; + + return 0; +} + +static struct intel_pmic_opregion_data intel_crc_pmic_opregion_data = { + .get_power = intel_crc_pmic_get_power, + .update_power = intel_crc_pmic_update_power, + .get_raw_temp = intel_crc_pmic_get_raw_temp, + .update_aux = intel_crc_pmic_update_aux, + .get_policy = intel_crc_pmic_get_policy, + .update_policy = intel_crc_pmic_update_policy, + .power_table = power_table, + .power_table_count= ARRAY_SIZE(power_table), + .thermal_table = thermal_table, + .thermal_table_count = ARRAY_SIZE(thermal_table), +}; + +static int intel_crc_pmic_opregion_probe(struct platform_device *pdev) +{ + struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent); + return intel_pmic_install_opregion_handler(&pdev->dev, + ACPI_HANDLE(pdev->dev.parent), pmic->regmap, + &intel_crc_pmic_opregion_data); +} + +static struct platform_driver intel_crc_pmic_opregion_driver = { + .probe = intel_crc_pmic_opregion_probe, + .driver = { + .name = "crystal_cove_pmic", + }, +}; +builtin_platform_driver(intel_crc_pmic_opregion_driver); |