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Commit 9b928c78 authored by Bin Gao's avatar Bin Gao Committed by Rafael J. Wysocki
Browse files

ACPI / PMIC: Add opregion driver for Intel BXT WhiskeyCove PMIC 



This patch adds operation region driver for Intel BXT WhiskeyCove
PMIC. The register mapping is done as per the BXT WC data sheet.

Signed-off-by: default avatarAjay Thomas <ajay.thomas.david.rajamanickam@intel.com>
Signed-off-by: default avatarBin Gao <bin.gao@intel.com>
Reviewed-by: default avatarAaron Lu <aaron.lu@intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent d8ba8191

drivers/acpi/Kconfig

+6 −0
Original line number Diff line number Diff line
@@ -519,6 +519,12 @@ config XPOWER_PMIC_OPREGION 
	help

	  This config adds ACPI operation region support for XPower AXP288 PMIC.



config BXT_WC_PMIC_OPREGION

	bool "ACPI operation region support for BXT WhiskeyCove PMIC"

	depends on INTEL_SOC_PMIC

	help

	  This config adds ACPI operation region support for BXT WhiskeyCove PMIC.



endif



endif	# ACPI

drivers/acpi/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -99,5 +99,6 @@ obj-$(CONFIG_ACPI_EXTLOG) += acpi_extlog.o 
obj-$(CONFIG_PMIC_OPREGION)	+= pmic/intel_pmic.o

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



video-objs			+= acpi_video.o video_detect.o

drivers/acpi/pmic/intel_pmic_bxtwc.c

0 → 100644
+424 −0
Original line number Diff line number Diff line 
/*

 * intel_pmic_bxtwc.c - Intel BXT WhiskeyCove PMIC operation region driver

 *

 * Copyright (C) 2015 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/module.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 WHISKEY_COVE_ALRT_HIGH_BIT_MASK 0x0F

#define WHISKEY_COVE_ADC_HIGH_BIT(x)	(((x & 0x0F) << 8))

#define WHISKEY_COVE_ADC_CURSRC(x)	(((x & 0xF0) >> 4))

#define VR_MODE_DISABLED        0

#define VR_MODE_AUTO            BIT(0)

#define VR_MODE_NORMAL          BIT(1)

#define VR_MODE_SWITCH          BIT(2)

#define VR_MODE_ECO             (BIT(0)|BIT(1))

#define VSWITCH2_OUTPUT         BIT(5)

#define VSWITCH1_OUTPUT         BIT(4)

#define VUSBPHY_CHARGE          BIT(1)



static struct pmic_table power_table[] = {

	{

		.address = 0x0,

		.reg = 0x63,

		.bit = VR_MODE_AUTO,

	}, /* VDD1 -> VDD1CNT */

	{

		.address = 0x04,

		.reg = 0x65,

		.bit = VR_MODE_AUTO,

	}, /* VDD2 -> VDD2CNT */

	{

		.address = 0x08,

		.reg = 0x67,

		.bit = VR_MODE_AUTO,

	}, /* VDD3 -> VDD3CNT */

	{

		.address = 0x0c,

		.reg = 0x6d,

		.bit = VR_MODE_AUTO,

	}, /* VLFX -> VFLEXCNT */

	{

		.address = 0x10,

		.reg = 0x6f,

		.bit = VR_MODE_NORMAL,

	}, /* VP1A -> VPROG1ACNT */

	{

		.address = 0x14,

		.reg = 0x70,

		.bit = VR_MODE_NORMAL,

	}, /* VP1B -> VPROG1BCNT */

	{

		.address = 0x18,

		.reg = 0x71,

		.bit = VR_MODE_NORMAL,

	}, /* VP1C -> VPROG1CCNT */

	{

		.address = 0x1c,

		.reg = 0x72,

		.bit = VR_MODE_NORMAL,

	}, /* VP1D -> VPROG1DCNT */

	{

		.address = 0x20,

		.reg = 0x73,

		.bit = VR_MODE_NORMAL,

	}, /* VP2A -> VPROG2ACNT */

	{

		.address = 0x24,

		.reg = 0x74,

		.bit = VR_MODE_NORMAL,

	}, /* VP2B -> VPROG2BCNT */

	{

		.address = 0x28,

		.reg = 0x75,

		.bit = VR_MODE_NORMAL,

	}, /* VP2C -> VPROG2CCNT */

	{

		.address = 0x2c,

		.reg = 0x76,

		.bit = VR_MODE_NORMAL,

	}, /* VP3A -> VPROG3ACNT */

	{

		.address = 0x30,

		.reg = 0x77,

		.bit = VR_MODE_NORMAL,

	}, /* VP3B -> VPROG3BCNT */

	{

		.address = 0x34,

		.reg = 0x78,

		.bit = VSWITCH2_OUTPUT,

	}, /* VSW2 -> VLD0CNT Bit 5*/

	{

		.address = 0x38,

		.reg = 0x78,

		.bit = VSWITCH1_OUTPUT,

	}, /* VSW1 -> VLD0CNT Bit 4 */

	{

		.address = 0x3c,

		.reg = 0x78,

		.bit = VUSBPHY_CHARGE,

	}, /* VUPY -> VLDOCNT Bit 1 */

	{

		.address = 0x40,

		.reg = 0x7b,

		.bit = VR_MODE_NORMAL,

	}, /* VRSO -> VREFSOCCNT*/

	{

		.address = 0x44,

		.reg = 0xA0,

		.bit = VR_MODE_NORMAL,

	}, /* VP1E -> VPROG1ECNT */

	{

		.address = 0x48,

		.reg = 0xA1,

		.bit = VR_MODE_NORMAL,

	}, /* VP1F -> VPROG1FCNT */

	{

		.address = 0x4c,

		.reg = 0xA2,

		.bit = VR_MODE_NORMAL,

	}, /* VP2D -> VPROG2DCNT */

	{

		.address = 0x50,

		.reg = 0xA3,

		.bit = VR_MODE_NORMAL,

	}, /* VP4A -> VPROG4ACNT */

	{

		.address = 0x54,

		.reg = 0xA4,

		.bit = VR_MODE_NORMAL,

	}, /* VP4B -> VPROG4BCNT */

	{

		.address = 0x58,

		.reg = 0xA5,

		.bit = VR_MODE_NORMAL,

	}, /* VP4C -> VPROG4CCNT */

	{

		.address = 0x5c,

		.reg = 0xA6,

		.bit = VR_MODE_NORMAL,

	}, /* VP4D -> VPROG4DCNT */

	{

		.address = 0x60,

		.reg = 0xA7,

		.bit = VR_MODE_NORMAL,

	}, /* VP5A -> VPROG5ACNT */

	{

		.address = 0x64,

		.reg = 0xA8,

		.bit = VR_MODE_NORMAL,

	}, /* VP5B -> VPROG5BCNT */

	{

		.address = 0x68,

		.reg = 0xA9,

		.bit = VR_MODE_NORMAL,

	}, /* VP6A -> VPROG6ACNT */

	{

		.address = 0x6c,

		.reg = 0xAA,

		.bit = VR_MODE_NORMAL,

	}, /* VP6B -> VPROG6BCNT */

	{

		.address = 0x70,

		.reg = 0x36,

		.bit = BIT(2),

	}, /* SDWN_N -> MODEMCTRL Bit 2 */

	{

		.address = 0x74,

		.reg = 0x36,

		.bit = BIT(0),

	} /* MOFF -> MODEMCTRL Bit 0 */

};



static struct pmic_table thermal_table[] = {

	{

		.address = 0x00,

		.reg = 0x4F39

	},

	{

		.address = 0x04,

		.reg = 0x4F24

	},

	{

		.address = 0x08,

		.reg = 0x4F26

	},

	{

		.address = 0x0c,

		.reg = 0x4F3B

	},

	{

		.address = 0x10,

		.reg = 0x4F28

	},

	{

		.address = 0x14,

		.reg = 0x4F2A

	},

	{

		.address = 0x18,

		.reg = 0x4F3D

	},

	{

		.address = 0x1c,

		.reg = 0x4F2C

	},

	{

		.address = 0x20,

		.reg = 0x4F2E

	},

	{

		.address = 0x24,

		.reg = 0x4F3F

	},

	{

		.address = 0x28,

		.reg = 0x4F30

	},

	{

		.address = 0x30,

		.reg = 0x4F41

	},

	{

		.address = 0x34,

		.reg = 0x4F32

	},

	{

		.address = 0x3c,

		.reg = 0x4F43

	},

	{

		.address = 0x40,

		.reg = 0x4F34

	},

	{

		.address = 0x48,

		.reg = 0x4F6A,

		.bit = 0,

	},

	{

		.address = 0x4C,

		.reg = 0x4F6A,

		.bit = 1

	},

	{

		.address = 0x50,

		.reg = 0x4F6A,

		.bit = 2

	},

	{

		.address = 0x54,

		.reg = 0x4F6A,

		.bit = 4

	},

	{

		.address = 0x58,

		.reg = 0x4F6A,

		.bit = 5

	},

	{

		.address = 0x5C,

		.reg = 0x4F6A,

		.bit = 3

	},

};



static int intel_bxtwc_pmic_get_power(struct regmap *regmap, int reg,

		int bit, u64 *value)

{

	int data;



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

		return -EIO;



	*value = (data & bit) ? 1 : 0;

	return 0;

}



static int intel_bxtwc_pmic_update_power(struct regmap *regmap, int reg,

		int bit, bool on)

{

	u8 val, mask = bit;



	if (on)

		val = 0xFF;

	else

		val = 0x0;



	return regmap_update_bits(regmap, reg, mask, val);

}



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

{

	unsigned int val, adc_val, reg_val;

	u8 temp_l, temp_h, cursrc;

	unsigned long rlsb;

	static const unsigned long rlsb_array[] = {

		0, 260420, 130210, 65100, 32550, 16280,

		8140, 4070, 2030, 0, 260420, 130210 };



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

		return -EIO;

	temp_l = (u8) val;



	if (regmap_read(regmap, (reg - 1), &val))

		return -EIO;

	temp_h = (u8) val;



	reg_val = temp_l | WHISKEY_COVE_ADC_HIGH_BIT(temp_h);

	cursrc = WHISKEY_COVE_ADC_CURSRC(temp_h);

	rlsb = rlsb_array[cursrc];

	adc_val = reg_val * rlsb / 1000;



	return adc_val;

}



static int

intel_bxtwc_pmic_update_aux(struct regmap *regmap, int reg, int raw)

{

	u32 bsr_num;

	u16 resi_val, count = 0, thrsh = 0;

	u8 alrt_h, alrt_l, cursel = 0;



	bsr_num = raw;

	bsr_num /= (1 << 5);



	count = fls(bsr_num) - 1;



	cursel = clamp_t(s8, (count - 7), 0, 7);

	thrsh = raw / (1 << (4 + cursel));



	resi_val = (cursel << 9) | thrsh;

	alrt_h = (resi_val >> 8) & WHISKEY_COVE_ALRT_HIGH_BIT_MASK;

	if (regmap_update_bits(regmap,

				reg - 1,

				WHISKEY_COVE_ALRT_HIGH_BIT_MASK,

				alrt_h))

		return -EIO;



	alrt_l = (u8)resi_val;

	return regmap_write(regmap, reg, alrt_l);

}



static int

intel_bxtwc_pmic_get_policy(struct regmap *regmap, int reg, int bit, u64 *value)

{

	u8 mask = BIT(bit);

	unsigned int val;



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

		return -EIO;



	*value = (val & mask) >> bit;

	return 0;

}



static int

intel_bxtwc_pmic_update_policy(struct regmap *regmap,

				int reg, int bit, int enable)

{

	u8 mask = BIT(bit), val = enable << bit;



	return regmap_update_bits(regmap, reg, mask, val);

}



static struct intel_pmic_opregion_data intel_bxtwc_pmic_opregion_data = {

	.get_power      = intel_bxtwc_pmic_get_power,

	.update_power   = intel_bxtwc_pmic_update_power,

	.get_raw_temp   = intel_bxtwc_pmic_get_raw_temp,

	.update_aux     = intel_bxtwc_pmic_update_aux,

	.get_policy     = intel_bxtwc_pmic_get_policy,

	.update_policy  = intel_bxtwc_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_bxtwc_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_bxtwc_pmic_opregion_data);

}



static struct platform_device_id bxt_wc_opregion_id_table[] = {

	{ .name = "bxt_wcove_region" },

	{},

};



static struct platform_driver intel_bxtwc_pmic_opregion_driver = {

	.probe = intel_bxtwc_pmic_opregion_probe,

	.driver = {

		.name = "bxt_whiskey_cove_pmic",

	},

	.id_table = bxt_wc_opregion_id_table,

};



static int __init intel_bxtwc_pmic_opregion_driver_init(void)

{

	return platform_driver_register(&intel_bxtwc_pmic_opregion_driver);

}



device_initcall(intel_bxtwc_pmic_opregion_driver_init);



MODULE_DESCRIPTION("BXT WhiskeyCove ACPI opregion driver");

MODULE_LICENSE("GPL");