2018-08-30 19:52:54 +03:00
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// SPDX-License-Identifier: GPL-2.0
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2017-06-04 15:59:20 +03:00
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/*
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* MFD core driver for Intel Cherrytrail Whiskey Cove PMIC
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*
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* Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com>
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*
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* Based on various non upstream patches to support the CHT Whiskey Cove PMIC:
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* Copyright (C) 2013-2015 Intel Corporation. All rights reserved.
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*/
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#include <linux/acpi.h>
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#include <linux/delay.h>
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mfd: intel_soc_pmic_chtwc: Add cht_wc_model data to struct intel_soc_pmic
Tablet / laptop designs using an Intel Cherry Trail x86 main SoC with
an Intel Whiskey Cove PMIC do not use a single standard setup for
the charger, fuel-gauge and other chips surrounding the PMIC /
charging+data USB port.
Unlike what is normal on x86 this diversity in designs is not handled
by the ACPI tables. On 2 of the 3 known designs there are no standard
(PNP0C0A) ACPI battery devices and on the 3th design the ACPI battery
device does not work under Linux due to it requiring non-standard
and undocumented ACPI behavior.
So to make things work under Linux we use native charger and fuel-gauge
drivers on these devices, re-using the native drivers used on ARM boards
with the same charger / fuel-gauge ICs.
This requires various MFD-cell drivers for the CHT-WC PMIC cells to
know which model they are exactly running on so that they can e.g.
instantiate an I2C-client for the right model charger-IC (the charger
is connected to an I2C-controller which is part of the PMIC).
Rather then duplicating DMI-id matching to check which model we are
running on in each MFD-cell driver, add a check for this to the
shared drivers/mfd/intel_soc_pmic_chtwc.c code by using a
DMI table for all 3 known models:
1. The GPD Win and GPD Pocket mini-laptops, these are really 2 models
but the Pocket re-uses the GPD Win's design in a different housing:
The WC PMIC is connected to a TI BQ24292i charger, paired with
a Maxim MAX17047 fuelgauge + a FUSB302 USB Type-C Controller +
a PI3USB30532 USB switch, for a fully functional Type-C port.
2. The Xiaomi Mi Pad 2:
The WC PMIC is connected to a TI BQ25890 charger, paired with
a TI BQ27520 fuelgauge, using the TI BQ25890 for BC1.2 charger type
detection, for a USB-2 only Type-C port without PD.
3. The Lenovo Yoga Book YB1-X90 / Lenovo Yoga Book YB1-X91 series:
The WC PMIC is connected to a TI BQ25892 charger, paired with
a TI BQ27542 fuelgauge, using the WC PMIC for BC1.2 charger type
detection and using the BQ25892's Mediatek Pump Express+ (1.0)
support to enable charging with up to 12V through a micro-USB port.
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
2022-02-01 16:07:00 +03:00
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#include <linux/dmi.h>
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2017-06-04 15:59:20 +03:00
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/intel_soc_pmic.h>
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#include <linux/regmap.h>
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/* PMIC device registers */
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#define REG_OFFSET_MASK GENMASK(7, 0)
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#define REG_ADDR_MASK GENMASK(15, 8)
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#define REG_ADDR_SHIFT 8
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#define CHT_WC_IRQLVL1 0x6e02
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#define CHT_WC_IRQLVL1_MASK 0x6e0e
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/* Whiskey Cove PMIC share same ACPI ID between different platforms */
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#define CHT_WC_HRV 3
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/* Level 1 IRQs (level 2 IRQs are handled in the child device drivers) */
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enum {
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CHT_WC_PWRSRC_IRQ = 0,
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CHT_WC_THRM_IRQ,
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CHT_WC_BCU_IRQ,
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CHT_WC_ADC_IRQ,
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CHT_WC_EXT_CHGR_IRQ,
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CHT_WC_GPIO_IRQ,
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/* There is no irq 6 */
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CHT_WC_CRIT_IRQ = 7,
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};
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2020-09-22 22:26:53 +03:00
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static const struct resource cht_wc_pwrsrc_resources[] = {
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2017-06-04 15:59:20 +03:00
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DEFINE_RES_IRQ(CHT_WC_PWRSRC_IRQ),
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};
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2020-09-22 22:26:53 +03:00
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static const struct resource cht_wc_ext_charger_resources[] = {
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2017-06-04 15:59:20 +03:00
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DEFINE_RES_IRQ(CHT_WC_EXT_CHGR_IRQ),
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};
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static struct mfd_cell cht_wc_dev[] = {
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{
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.name = "cht_wcove_pwrsrc",
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.num_resources = ARRAY_SIZE(cht_wc_pwrsrc_resources),
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.resources = cht_wc_pwrsrc_resources,
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}, {
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.name = "cht_wcove_ext_chgr",
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.num_resources = ARRAY_SIZE(cht_wc_ext_charger_resources),
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.resources = cht_wc_ext_charger_resources,
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},
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{ .name = "cht_wcove_region", },
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2019-02-12 23:59:01 +03:00
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{ .name = "cht_wcove_leds", },
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2017-06-04 15:59:20 +03:00
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};
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/*
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* The CHT Whiskey Cove covers multiple I2C addresses, with a 1 Byte
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* register address space per I2C address, so we use 16 bit register
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* addresses where the high 8 bits contain the I2C client address.
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*/
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static int cht_wc_byte_reg_read(void *context, unsigned int reg,
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unsigned int *val)
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{
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struct i2c_client *client = context;
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int ret, orig_addr = client->addr;
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if (!(reg & REG_ADDR_MASK)) {
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dev_err(&client->dev, "Error I2C address not specified\n");
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return -EINVAL;
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}
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client->addr = (reg & REG_ADDR_MASK) >> REG_ADDR_SHIFT;
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ret = i2c_smbus_read_byte_data(client, reg & REG_OFFSET_MASK);
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client->addr = orig_addr;
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if (ret < 0)
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return ret;
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*val = ret;
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return 0;
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}
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static int cht_wc_byte_reg_write(void *context, unsigned int reg,
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unsigned int val)
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{
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struct i2c_client *client = context;
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int ret, orig_addr = client->addr;
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if (!(reg & REG_ADDR_MASK)) {
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dev_err(&client->dev, "Error I2C address not specified\n");
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return -EINVAL;
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}
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client->addr = (reg & REG_ADDR_MASK) >> REG_ADDR_SHIFT;
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ret = i2c_smbus_write_byte_data(client, reg & REG_OFFSET_MASK, val);
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client->addr = orig_addr;
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return ret;
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}
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static const struct regmap_config cht_wc_regmap_cfg = {
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.reg_bits = 16,
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.val_bits = 8,
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.reg_write = cht_wc_byte_reg_write,
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.reg_read = cht_wc_byte_reg_read,
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};
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static const struct regmap_irq cht_wc_regmap_irqs[] = {
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REGMAP_IRQ_REG(CHT_WC_PWRSRC_IRQ, 0, BIT(CHT_WC_PWRSRC_IRQ)),
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REGMAP_IRQ_REG(CHT_WC_THRM_IRQ, 0, BIT(CHT_WC_THRM_IRQ)),
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REGMAP_IRQ_REG(CHT_WC_BCU_IRQ, 0, BIT(CHT_WC_BCU_IRQ)),
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REGMAP_IRQ_REG(CHT_WC_ADC_IRQ, 0, BIT(CHT_WC_ADC_IRQ)),
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REGMAP_IRQ_REG(CHT_WC_EXT_CHGR_IRQ, 0, BIT(CHT_WC_EXT_CHGR_IRQ)),
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REGMAP_IRQ_REG(CHT_WC_GPIO_IRQ, 0, BIT(CHT_WC_GPIO_IRQ)),
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REGMAP_IRQ_REG(CHT_WC_CRIT_IRQ, 0, BIT(CHT_WC_CRIT_IRQ)),
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};
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static const struct regmap_irq_chip cht_wc_regmap_irq_chip = {
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.name = "cht_wc_irq_chip",
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.status_base = CHT_WC_IRQLVL1,
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.mask_base = CHT_WC_IRQLVL1_MASK,
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.irqs = cht_wc_regmap_irqs,
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.num_irqs = ARRAY_SIZE(cht_wc_regmap_irqs),
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.num_regs = 1,
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};
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mfd: intel_soc_pmic_chtwc: Add cht_wc_model data to struct intel_soc_pmic
Tablet / laptop designs using an Intel Cherry Trail x86 main SoC with
an Intel Whiskey Cove PMIC do not use a single standard setup for
the charger, fuel-gauge and other chips surrounding the PMIC /
charging+data USB port.
Unlike what is normal on x86 this diversity in designs is not handled
by the ACPI tables. On 2 of the 3 known designs there are no standard
(PNP0C0A) ACPI battery devices and on the 3th design the ACPI battery
device does not work under Linux due to it requiring non-standard
and undocumented ACPI behavior.
So to make things work under Linux we use native charger and fuel-gauge
drivers on these devices, re-using the native drivers used on ARM boards
with the same charger / fuel-gauge ICs.
This requires various MFD-cell drivers for the CHT-WC PMIC cells to
know which model they are exactly running on so that they can e.g.
instantiate an I2C-client for the right model charger-IC (the charger
is connected to an I2C-controller which is part of the PMIC).
Rather then duplicating DMI-id matching to check which model we are
running on in each MFD-cell driver, add a check for this to the
shared drivers/mfd/intel_soc_pmic_chtwc.c code by using a
DMI table for all 3 known models:
1. The GPD Win and GPD Pocket mini-laptops, these are really 2 models
but the Pocket re-uses the GPD Win's design in a different housing:
The WC PMIC is connected to a TI BQ24292i charger, paired with
a Maxim MAX17047 fuelgauge + a FUSB302 USB Type-C Controller +
a PI3USB30532 USB switch, for a fully functional Type-C port.
2. The Xiaomi Mi Pad 2:
The WC PMIC is connected to a TI BQ25890 charger, paired with
a TI BQ27520 fuelgauge, using the TI BQ25890 for BC1.2 charger type
detection, for a USB-2 only Type-C port without PD.
3. The Lenovo Yoga Book YB1-X90 / Lenovo Yoga Book YB1-X91 series:
The WC PMIC is connected to a TI BQ25892 charger, paired with
a TI BQ27542 fuelgauge, using the WC PMIC for BC1.2 charger type
detection and using the BQ25892's Mediatek Pump Express+ (1.0)
support to enable charging with up to 12V through a micro-USB port.
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
2022-02-01 16:07:00 +03:00
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static const struct dmi_system_id cht_wc_model_dmi_ids[] = {
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{
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/* GPD win / GPD pocket mini laptops */
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.driver_data = (void *)(long)INTEL_CHT_WC_GPD_WIN_POCKET,
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/*
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* This DMI match may not seem unique, but it is. In the 67000+
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* DMI decode dumps from linux-hardware.org only 116 have
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* board_vendor set to "AMI Corporation" and of those 116 only
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* the GPD win's and pocket's board_name is "Default string".
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*/
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.matches = {
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DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
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DMI_EXACT_MATCH(DMI_BOARD_NAME, "Default string"),
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DMI_EXACT_MATCH(DMI_BOARD_SERIAL, "Default string"),
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DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Default string"),
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},
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}, {
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/* Xiaomi Mi Pad 2 */
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.driver_data = (void *)(long)INTEL_CHT_WC_XIAOMI_MIPAD2,
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Xiaomi Inc"),
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DMI_MATCH(DMI_PRODUCT_NAME, "Mipad2"),
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},
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}, {
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/* Lenovo Yoga Book X90F / X91F / X91L */
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.driver_data = (void *)(long)INTEL_CHT_WC_LENOVO_YOGABOOK1,
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.matches = {
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/* Non exact match to match all versions */
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DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X9"),
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},
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},
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{ }
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};
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2017-06-04 15:59:20 +03:00
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static int cht_wc_probe(struct i2c_client *client)
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{
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struct device *dev = &client->dev;
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mfd: intel_soc_pmic_chtwc: Add cht_wc_model data to struct intel_soc_pmic
Tablet / laptop designs using an Intel Cherry Trail x86 main SoC with
an Intel Whiskey Cove PMIC do not use a single standard setup for
the charger, fuel-gauge and other chips surrounding the PMIC /
charging+data USB port.
Unlike what is normal on x86 this diversity in designs is not handled
by the ACPI tables. On 2 of the 3 known designs there are no standard
(PNP0C0A) ACPI battery devices and on the 3th design the ACPI battery
device does not work under Linux due to it requiring non-standard
and undocumented ACPI behavior.
So to make things work under Linux we use native charger and fuel-gauge
drivers on these devices, re-using the native drivers used on ARM boards
with the same charger / fuel-gauge ICs.
This requires various MFD-cell drivers for the CHT-WC PMIC cells to
know which model they are exactly running on so that they can e.g.
instantiate an I2C-client for the right model charger-IC (the charger
is connected to an I2C-controller which is part of the PMIC).
Rather then duplicating DMI-id matching to check which model we are
running on in each MFD-cell driver, add a check for this to the
shared drivers/mfd/intel_soc_pmic_chtwc.c code by using a
DMI table for all 3 known models:
1. The GPD Win and GPD Pocket mini-laptops, these are really 2 models
but the Pocket re-uses the GPD Win's design in a different housing:
The WC PMIC is connected to a TI BQ24292i charger, paired with
a Maxim MAX17047 fuelgauge + a FUSB302 USB Type-C Controller +
a PI3USB30532 USB switch, for a fully functional Type-C port.
2. The Xiaomi Mi Pad 2:
The WC PMIC is connected to a TI BQ25890 charger, paired with
a TI BQ27520 fuelgauge, using the TI BQ25890 for BC1.2 charger type
detection, for a USB-2 only Type-C port without PD.
3. The Lenovo Yoga Book YB1-X90 / Lenovo Yoga Book YB1-X91 series:
The WC PMIC is connected to a TI BQ25892 charger, paired with
a TI BQ27542 fuelgauge, using the WC PMIC for BC1.2 charger type
detection and using the BQ25892's Mediatek Pump Express+ (1.0)
support to enable charging with up to 12V through a micro-USB port.
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
2022-02-01 16:07:00 +03:00
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const struct dmi_system_id *id;
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2017-06-04 15:59:20 +03:00
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struct intel_soc_pmic *pmic;
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acpi_status status;
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unsigned long long hrv;
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int ret;
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status = acpi_evaluate_integer(ACPI_HANDLE(dev), "_HRV", NULL, &hrv);
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2022-06-16 20:10:08 +03:00
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if (ACPI_FAILURE(status))
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return dev_err_probe(dev, -ENODEV, "Failed to get PMIC hardware revision\n");
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if (hrv != CHT_WC_HRV)
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return dev_err_probe(dev, -ENODEV, "Invalid PMIC hardware revision: %llu\n", hrv);
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if (client->irq < 0)
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return dev_err_probe(dev, -EINVAL, "Invalid IRQ\n");
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2017-06-04 15:59:20 +03:00
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pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
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if (!pmic)
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return -ENOMEM;
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mfd: intel_soc_pmic_chtwc: Add cht_wc_model data to struct intel_soc_pmic
Tablet / laptop designs using an Intel Cherry Trail x86 main SoC with
an Intel Whiskey Cove PMIC do not use a single standard setup for
the charger, fuel-gauge and other chips surrounding the PMIC /
charging+data USB port.
Unlike what is normal on x86 this diversity in designs is not handled
by the ACPI tables. On 2 of the 3 known designs there are no standard
(PNP0C0A) ACPI battery devices and on the 3th design the ACPI battery
device does not work under Linux due to it requiring non-standard
and undocumented ACPI behavior.
So to make things work under Linux we use native charger and fuel-gauge
drivers on these devices, re-using the native drivers used on ARM boards
with the same charger / fuel-gauge ICs.
This requires various MFD-cell drivers for the CHT-WC PMIC cells to
know which model they are exactly running on so that they can e.g.
instantiate an I2C-client for the right model charger-IC (the charger
is connected to an I2C-controller which is part of the PMIC).
Rather then duplicating DMI-id matching to check which model we are
running on in each MFD-cell driver, add a check for this to the
shared drivers/mfd/intel_soc_pmic_chtwc.c code by using a
DMI table for all 3 known models:
1. The GPD Win and GPD Pocket mini-laptops, these are really 2 models
but the Pocket re-uses the GPD Win's design in a different housing:
The WC PMIC is connected to a TI BQ24292i charger, paired with
a Maxim MAX17047 fuelgauge + a FUSB302 USB Type-C Controller +
a PI3USB30532 USB switch, for a fully functional Type-C port.
2. The Xiaomi Mi Pad 2:
The WC PMIC is connected to a TI BQ25890 charger, paired with
a TI BQ27520 fuelgauge, using the TI BQ25890 for BC1.2 charger type
detection, for a USB-2 only Type-C port without PD.
3. The Lenovo Yoga Book YB1-X90 / Lenovo Yoga Book YB1-X91 series:
The WC PMIC is connected to a TI BQ25892 charger, paired with
a TI BQ27542 fuelgauge, using the WC PMIC for BC1.2 charger type
detection and using the BQ25892's Mediatek Pump Express+ (1.0)
support to enable charging with up to 12V through a micro-USB port.
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
2022-02-01 16:07:00 +03:00
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id = dmi_first_match(cht_wc_model_dmi_ids);
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if (id)
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pmic->cht_wc_model = (long)id->driver_data;
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2017-06-04 15:59:20 +03:00
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pmic->irq = client->irq;
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pmic->dev = dev;
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i2c_set_clientdata(client, pmic);
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|
|
|
|
pmic->regmap = devm_regmap_init(dev, NULL, client, &cht_wc_regmap_cfg);
|
|
|
|
if (IS_ERR(pmic->regmap))
|
|
|
|
return PTR_ERR(pmic->regmap);
|
|
|
|
|
|
|
|
ret = devm_regmap_add_irq_chip(dev, pmic->regmap, pmic->irq,
|
|
|
|
IRQF_ONESHOT | IRQF_SHARED, 0,
|
|
|
|
&cht_wc_regmap_irq_chip,
|
|
|
|
&pmic->irq_chip_data);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
return devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
|
|
|
|
cht_wc_dev, ARRAY_SIZE(cht_wc_dev), NULL, 0,
|
|
|
|
regmap_irq_get_domain(pmic->irq_chip_data));
|
|
|
|
}
|
|
|
|
|
|
|
|
static void cht_wc_shutdown(struct i2c_client *client)
|
|
|
|
{
|
|
|
|
struct intel_soc_pmic *pmic = i2c_get_clientdata(client);
|
|
|
|
|
|
|
|
disable_irq(pmic->irq);
|
|
|
|
}
|
|
|
|
|
2022-06-16 20:10:09 +03:00
|
|
|
static int cht_wc_suspend(struct device *dev)
|
2017-06-04 15:59:20 +03:00
|
|
|
{
|
|
|
|
struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
|
|
|
|
|
|
|
|
disable_irq(pmic->irq);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2022-06-16 20:10:09 +03:00
|
|
|
static int cht_wc_resume(struct device *dev)
|
2017-06-04 15:59:20 +03:00
|
|
|
{
|
|
|
|
struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
|
|
|
|
|
|
|
|
enable_irq(pmic->irq);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
2022-06-16 20:10:09 +03:00
|
|
|
static DEFINE_SIMPLE_DEV_PM_OPS(cht_wc_pm_ops, cht_wc_suspend, cht_wc_resume);
|
2017-06-04 15:59:20 +03:00
|
|
|
|
|
|
|
static const struct i2c_device_id cht_wc_i2c_id[] = {
|
|
|
|
{ }
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct acpi_device_id cht_wc_acpi_ids[] = {
|
|
|
|
{ "INT34D3", },
|
|
|
|
{ }
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct i2c_driver cht_wc_driver = {
|
|
|
|
.driver = {
|
|
|
|
.name = "CHT Whiskey Cove PMIC",
|
2022-06-16 20:10:09 +03:00
|
|
|
.pm = pm_sleep_ptr(&cht_wc_pm_ops),
|
2017-06-04 15:59:20 +03:00
|
|
|
.acpi_match_table = cht_wc_acpi_ids,
|
|
|
|
},
|
|
|
|
.probe_new = cht_wc_probe,
|
|
|
|
.shutdown = cht_wc_shutdown,
|
|
|
|
.id_table = cht_wc_i2c_id,
|
|
|
|
};
|
|
|
|
builtin_i2c_driver(cht_wc_driver);
|