Commit 31374972 authored by Takashi Iwai's avatar Takashi Iwai Committed by Lee Jones
Browse files

ACPI / PMIC: Add opregion driver for Intel Dollar Cove TI PMIC 

This patch adds the opregion driver for Dollar Cove TI PMIC on Intel
Cherry Trail devices.  The patch is based on the original work by
Intel, found at:
      https://github.com/01org/ProductionKernelQuilts
with many cleanups and rewrites.

The driver is currently provided only as built-in to follow other
PMIC opregion drivers convention.

The re-enumeration of devices at probe is required for fixing the
issues on HP x2 210 G2.  See bug#195689.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=193891
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=195689



Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
Reviewed-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent 6bac0606

drivers/acpi/Kconfig

+6 −0
Original line number Diff line number Diff line
@@ -521,6 +521,12 @@ config CHT_WC_PMIC_OPREGION 
	help

	  This config adds ACPI operation region support for CHT Whiskey Cove PMIC.



config CHT_DC_TI_PMIC_OPREGION

	bool "ACPI operation region support for Dollar Cove TI PMIC"

	depends on INTEL_SOC_PMIC_CHTDC_TI

	help

	  This config adds ACPI operation region support for Dollar Cove TI PMIC.



endif



config ACPI_CONFIGFS

drivers/acpi/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -104,6 +104,7 @@ obj-$(CONFIG_CRC_PMIC_OPREGION) += pmic/intel_pmic_crc.o 
obj-$(CONFIG_XPOWER_PMIC_OPREGION) += pmic/intel_pmic_xpower.o

obj-$(CONFIG_BXT_WC_PMIC_OPREGION) += pmic/intel_pmic_bxtwc.o

obj-$(CONFIG_CHT_WC_PMIC_OPREGION) += pmic/intel_pmic_chtwc.o

obj-$(CONFIG_CHT_DC_TI_PMIC_OPREGION) += pmic/intel_pmic_chtdc_ti.o



obj-$(CONFIG_ACPI_CONFIGFS)	+= acpi_configfs.o

drivers/acpi/pmic/intel_pmic_chtdc_ti.c

0 → 100644
+137 −0
Original line number Diff line number Diff line 
/*

 * Dollar Cove TI PMIC operation region driver

 * Copyright (C) 2014 Intel Corporation. All rights reserved.

 *

 * Rewritten and cleaned up

 * Copyright (C) 2017 Takashi Iwai <tiwai@suse.de>

 */



#include <linux/acpi.h>

#include <linux/init.h>

#include <linux/mfd/intel_soc_pmic.h>

#include <linux/platform_device.h>

#include "intel_pmic.h"



/* registers stored in 16bit BE (high:low, total 10bit) */

#define CHTDC_TI_VBAT		0x54

#define CHTDC_TI_DIETEMP	0x56

#define CHTDC_TI_BPTHERM	0x58

#define CHTDC_TI_GPADC		0x5a



static struct pmic_table chtdc_ti_power_table[] = {

	{ .address = 0x00, .reg = 0x41 },

	{ .address = 0x04, .reg = 0x42 },

	{ .address = 0x08, .reg = 0x43 },

	{ .address = 0x0c, .reg = 0x45 },

	{ .address = 0x10, .reg = 0x46 },

	{ .address = 0x14, .reg = 0x47 },

	{ .address = 0x18, .reg = 0x48 },

	{ .address = 0x1c, .reg = 0x49 },

	{ .address = 0x20, .reg = 0x4a },

	{ .address = 0x24, .reg = 0x4b },

	{ .address = 0x28, .reg = 0x4c },

	{ .address = 0x2c, .reg = 0x4d },

	{ .address = 0x30, .reg = 0x4e },

};



static struct pmic_table chtdc_ti_thermal_table[] = {

	{

		.address = 0x00,

		.reg = CHTDC_TI_GPADC

	},

	{

		.address = 0x0c,

		.reg = CHTDC_TI_GPADC

	},

	/* TMP2 -> SYSTEMP */

	{

		.address = 0x18,

		.reg = CHTDC_TI_GPADC

	},

	/* TMP3 -> BPTHERM */

	{

		.address = 0x24,

		.reg = CHTDC_TI_BPTHERM

	},

	{

		.address = 0x30,

		.reg = CHTDC_TI_GPADC

	},

	/* TMP5 -> DIETEMP */

	{

		.address = 0x3c,

		.reg = CHTDC_TI_DIETEMP

	},

};



static int chtdc_ti_pmic_get_power(struct regmap *regmap, int reg, int bit,

				   u64 *value)

{

	int data;



	if (regmap_read(regmap, reg, &data))

		return -EIO;



	*value = data & 1;

	return 0;

}



static int chtdc_ti_pmic_update_power(struct regmap *regmap, int reg, int bit,

				      bool on)

{

	return regmap_update_bits(regmap, reg, 1, on);

}



static int chtdc_ti_pmic_get_raw_temp(struct regmap *regmap, int reg)

{

	u8 buf[2];



	if (regmap_bulk_read(regmap, reg, buf, 2))

		return -EIO;



	/* stored in big-endian */

	return ((buf[0] & 0x03) << 8) | buf[1];

}



static struct intel_pmic_opregion_data chtdc_ti_pmic_opregion_data = {

	.get_power = chtdc_ti_pmic_get_power,

	.update_power = chtdc_ti_pmic_update_power,

	.get_raw_temp = chtdc_ti_pmic_get_raw_temp,

	.power_table = chtdc_ti_power_table,

	.power_table_count = ARRAY_SIZE(chtdc_ti_power_table),

	.thermal_table = chtdc_ti_thermal_table,

	.thermal_table_count = ARRAY_SIZE(chtdc_ti_thermal_table),

};



static int chtdc_ti_pmic_opregion_probe(struct platform_device *pdev)

{

	struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);

	int err;



	err = intel_pmic_install_opregion_handler(&pdev->dev,

			ACPI_HANDLE(pdev->dev.parent), pmic->regmap,

			&chtdc_ti_pmic_opregion_data);

	if (err < 0)

		return err;



	/* Re-enumerate devices depending on PMIC */

	acpi_walk_dep_device_list(ACPI_HANDLE(pdev->dev.parent));

	return 0;

}



static const struct platform_device_id chtdc_ti_pmic_opregion_id_table[] = {

	{ .name = "chtdc_ti_region" },

	{},

};



static struct platform_driver chtdc_ti_pmic_opregion_driver = {

	.probe = chtdc_ti_pmic_opregion_probe,

	.driver = {

		.name = "cht_dollar_cove_ti_pmic",

	},

	.id_table = chtdc_ti_pmic_opregion_id_table,

};

module_platform_driver(chtdc_ti_pmic_opregion_driver);



MODULE_DESCRIPTION("Dollar Cove TI PMIC opregion driver");

MODULE_LICENSE("GPL v2");