Release 4.14 drivers/mfd/88pm800.c

/*
 * Base driver for Marvell 88PM800
 *
 * Copyright (C) 2012 Marvell International Ltd.
 * Haojian Zhuang <haojian.zhuang@marvell.com>
 * Joseph(Yossi) Hanin <yhanin@marvell.com>
 * Qiao Zhou <zhouqiao@marvell.com>
 *
 * This file is subject to the terms and conditions of the GNU General
 * Public License. See the file "COPYING" in the main directory of this
 * archive for more details.
 *
 * 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/kernel.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/mfd/core.h>
#include <linux/mfd/88pm80x.h>
#include <linux/slab.h>

/* Interrupt Registers */

#define PM800_INT_STATUS1		(0x05)

#define PM800_ONKEY_INT_STS1		(1 << 0)

#define PM800_EXTON_INT_STS1		(1 << 1)

#define PM800_CHG_INT_STS1			(1 << 2)

#define PM800_BAT_INT_STS1			(1 << 3)

#define PM800_RTC_INT_STS1			(1 << 4)

#define PM800_CLASSD_OC_INT_STS1	(1 << 5)


#define PM800_INT_STATUS2		(0x06)

#define PM800_VBAT_INT_STS2		(1 << 0)

#define PM800_VSYS_INT_STS2		(1 << 1)

#define PM800_VCHG_INT_STS2		(1 << 2)

#define PM800_TINT_INT_STS2		(1 << 3)

#define PM800_GPADC0_INT_STS2	(1 << 4)

#define PM800_TBAT_INT_STS2		(1 << 5)

#define PM800_GPADC2_INT_STS2	(1 << 6)

#define PM800_GPADC3_INT_STS2	(1 << 7)


#define PM800_INT_STATUS3		(0x07)


#define PM800_INT_STATUS4		(0x08)

#define PM800_GPIO0_INT_STS4		(1 << 0)

#define PM800_GPIO1_INT_STS4		(1 << 1)

#define PM800_GPIO2_INT_STS4		(1 << 2)

#define PM800_GPIO3_INT_STS4		(1 << 3)

#define PM800_GPIO4_INT_STS4		(1 << 4)


#define PM800_INT_ENA_1		(0x09)

#define PM800_ONKEY_INT_ENA1		(1 << 0)

#define PM800_EXTON_INT_ENA1		(1 << 1)

#define PM800_CHG_INT_ENA1			(1 << 2)

#define PM800_BAT_INT_ENA1			(1 << 3)

#define PM800_RTC_INT_ENA1			(1 << 4)

#define PM800_CLASSD_OC_INT_ENA1	(1 << 5)


#define PM800_INT_ENA_2		(0x0A)

#define PM800_VBAT_INT_ENA2		(1 << 0)

#define PM800_VSYS_INT_ENA2		(1 << 1)

#define PM800_VCHG_INT_ENA2		(1 << 2)

#define PM800_TINT_INT_ENA2		(1 << 3)


#define PM800_INT_ENA_3		(0x0B)

#define PM800_GPADC0_INT_ENA3		(1 << 0)

#define PM800_GPADC1_INT_ENA3		(1 << 1)

#define PM800_GPADC2_INT_ENA3		(1 << 2)

#define PM800_GPADC3_INT_ENA3		(1 << 3)

#define PM800_GPADC4_INT_ENA3		(1 << 4)


#define PM800_INT_ENA_4		(0x0C)

#define PM800_GPIO0_INT_ENA4		(1 << 0)

#define PM800_GPIO1_INT_ENA4		(1 << 1)

#define PM800_GPIO2_INT_ENA4		(1 << 2)

#define PM800_GPIO3_INT_ENA4		(1 << 3)

#define PM800_GPIO4_INT_ENA4		(1 << 4)

/* number of INT_ENA & INT_STATUS regs */

#define PM800_INT_REG_NUM			(4)

/* Interrupt Number in 88PM800 */
enum {
	
PM800_IRQ_ONKEY,	/*EN1b0 *//*0 */
	
PM800_IRQ_EXTON,	/*EN1b1 */
	
PM800_IRQ_CHG,		/*EN1b2 */
	
PM800_IRQ_BAT,		/*EN1b3 */
	
PM800_IRQ_RTC,		/*EN1b4 */
	
PM800_IRQ_CLASSD,	/*EN1b5 *//*5 */
	
PM800_IRQ_VBAT,		/*EN2b0 */
	
PM800_IRQ_VSYS,		/*EN2b1 */
	
PM800_IRQ_VCHG,		/*EN2b2 */
	
PM800_IRQ_TINT,		/*EN2b3 */
	
PM800_IRQ_GPADC0,	/*EN3b0 *//*10 */
	
PM800_IRQ_GPADC1,	/*EN3b1 */
	
PM800_IRQ_GPADC2,	/*EN3b2 */
	
PM800_IRQ_GPADC3,	/*EN3b3 */
	
PM800_IRQ_GPADC4,	/*EN3b4 */
	
PM800_IRQ_GPIO0,	/*EN4b0 *//*15 */
	
PM800_IRQ_GPIO1,	/*EN4b1 */
	
PM800_IRQ_GPIO2,	/*EN4b2 */
	
PM800_IRQ_GPIO3,	/*EN4b3 */
	
PM800_IRQ_GPIO4,	/*EN4b4 *//*19 */
	
PM800_MAX_IRQ,
};

/* PM800: generation identification number */

#define PM800_CHIP_GEN_ID_NUM	0x3


static const struct i2c_device_id pm80x_id_table[] = {
	{"88PM800", 0},
	{} /* NULL terminated */
};
MODULE_DEVICE_TABLE(i2c, pm80x_id_table);


static struct resource rtc_resources[] = {
	{
	 .name = "88pm80x-rtc",
	 .start = PM800_IRQ_RTC,
	 .end = PM800_IRQ_RTC,
	 .flags = IORESOURCE_IRQ,
         },
};


static struct mfd_cell rtc_devs[] = {
	{
	 .name = "88pm80x-rtc",
	 .num_resources = ARRAY_SIZE(rtc_resources),
	 .resources = &rtc_resources[0],
	 .id = -1,
         },
};


static struct resource onkey_resources[] = {
	{
	 .name = "88pm80x-onkey",
	 .start = PM800_IRQ_ONKEY,
	 .end = PM800_IRQ_ONKEY,
	 .flags = IORESOURCE_IRQ,
         },
};


static const struct mfd_cell onkey_devs[] = {
	{
	 .name = "88pm80x-onkey",
	 .num_resources = 1,
	 .resources = &onkey_resources[0],
	 .id = -1,
         },
};


static const struct mfd_cell regulator_devs[] = {
	{
	 .name = "88pm80x-regulator",
	 .id = -1,
        },
};


static const struct regmap_irq pm800_irqs[] = {
	/* INT0 */
	[PM800_IRQ_ONKEY] = {
		.mask = PM800_ONKEY_INT_ENA1,
        },
	[PM800_IRQ_EXTON] = {
		.mask = PM800_EXTON_INT_ENA1,
        },
	[PM800_IRQ_CHG] = {
		.mask = PM800_CHG_INT_ENA1,
        },
	[PM800_IRQ_BAT] = {
		.mask = PM800_BAT_INT_ENA1,
        },
	[PM800_IRQ_RTC] = {
		.mask = PM800_RTC_INT_ENA1,
        },
	[PM800_IRQ_CLASSD] = {
		.mask = PM800_CLASSD_OC_INT_ENA1,
        },
	/* INT1 */
	[PM800_IRQ_VBAT] = {
		.reg_offset = 1,
		.mask = PM800_VBAT_INT_ENA2,
        },
	[PM800_IRQ_VSYS] = {
		.reg_offset = 1,
		.mask = PM800_VSYS_INT_ENA2,
        },
	[PM800_IRQ_VCHG] = {
		.reg_offset = 1,
		.mask = PM800_VCHG_INT_ENA2,
        },
	[PM800_IRQ_TINT] = {
		.reg_offset = 1,
		.mask = PM800_TINT_INT_ENA2,
        },
	/* INT2 */
	[PM800_IRQ_GPADC0] = {
		.reg_offset = 2,
		.mask = PM800_GPADC0_INT_ENA3,
        },
	[PM800_IRQ_GPADC1] = {
		.reg_offset = 2,
		.mask = PM800_GPADC1_INT_ENA3,
        },
	[PM800_IRQ_GPADC2] = {
		.reg_offset = 2,
		.mask = PM800_GPADC2_INT_ENA3,
        },
	[PM800_IRQ_GPADC3] = {
		.reg_offset = 2,
		.mask = PM800_GPADC3_INT_ENA3,
        },
	[PM800_IRQ_GPADC4] = {
		.reg_offset = 2,
		.mask = PM800_GPADC4_INT_ENA3,
        },
	/* INT3 */
	[PM800_IRQ_GPIO0] = {
		.reg_offset = 3,
		.mask = PM800_GPIO0_INT_ENA4,
        },
	[PM800_IRQ_GPIO1] = {
		.reg_offset = 3,
		.mask = PM800_GPIO1_INT_ENA4,
        },
	[PM800_IRQ_GPIO2] = {
		.reg_offset = 3,
		.mask = PM800_GPIO2_INT_ENA4,
        },
	[PM800_IRQ_GPIO3] = {
		.reg_offset = 3,
		.mask = PM800_GPIO3_INT_ENA4,
        },
	[PM800_IRQ_GPIO4] = {
		.reg_offset = 3,
		.mask = PM800_GPIO4_INT_ENA4,
        },
};



static int device_gpadc_init(struct pm80x_chip *chip,
				       struct pm80x_platform_data *pdata)
{
	struct pm80x_subchip *subchip = chip->subchip;
	struct regmap *map = subchip->regmap_gpadc;
	int data = 0, mask = 0, ret = 0;

	if (!map) {
		dev_warn(chip->dev,
			 "Warning: gpadc regmap is not available!\n");
		return -EINVAL;
	}
	/*
         * initialize GPADC without activating it turn on GPADC
         * measurments
         */
	ret = regmap_update_bits(map,
				 PM800_GPADC_MISC_CONFIG2,
				 PM800_GPADC_MISC_GPFSM_EN,
				 PM800_GPADC_MISC_GPFSM_EN);
	if (ret < 0)
		goto out;
	/*
         * This function configures the ADC as requires for
         * CP implementation.CP does not "own" the ADC configuration
         * registers and relies on AP.
         * Reason: enable automatic ADC measurements needed
         * for CP to get VBAT and RF temperature readings.
         */
	ret = regmap_update_bits(map, PM800_GPADC_MEAS_EN1,
				 PM800_MEAS_EN1_VBAT, PM800_MEAS_EN1_VBAT);
	if (ret < 0)
		goto out;
	ret = regmap_update_bits(map, PM800_GPADC_MEAS_EN2,
				 (PM800_MEAS_EN2_RFTMP | PM800_MEAS_GP0_EN),
				 (PM800_MEAS_EN2_RFTMP | PM800_MEAS_GP0_EN));
	if (ret < 0)
		goto out;

	/*
         * the defult of PM800 is GPADC operates at 100Ks/s rate
         * and Number of GPADC slots with active current bias prior
         * to GPADC sampling = 1 slot for all GPADCs set for
         * Temprature mesurmants
         */
	mask = (PM800_GPADC_GP_BIAS_EN0 | PM800_GPADC_GP_BIAS_EN1 |
		PM800_GPADC_GP_BIAS_EN2 | PM800_GPADC_GP_BIAS_EN3);

	if (pdata && (pdata->batt_det == 0))
		data = (PM800_GPADC_GP_BIAS_EN0 | PM800_GPADC_GP_BIAS_EN1 |
			PM800_GPADC_GP_BIAS_EN2 | PM800_GPADC_GP_BIAS_EN3);
	else
		data = (PM800_GPADC_GP_BIAS_EN0 | PM800_GPADC_GP_BIAS_EN2 |
			PM800_GPADC_GP_BIAS_EN3);

	ret = regmap_update_bits(map, PM800_GP_BIAS_ENA1, mask, data);
	if (ret < 0)
		goto out;

	dev_info(chip->dev, "pm800 device_gpadc_init: Done\n");
	return 0;

out:
	dev_info(chip->dev, "pm800 device_gpadc_init: Failed!\n");
	return ret;
}

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static int device_onkey_init(struct pm80x_chip *chip,
				struct pm80x_platform_data *pdata)
{
	int ret;

	ret = mfd_add_devices(chip->dev, 0, &onkey_devs[0],
			      ARRAY_SIZE(onkey_devs), &onkey_resources[0], 0,
			      NULL);
	if (ret) {
		dev_err(chip->dev, "Failed to add onkey subdev\n");
		return ret;
	}

	return 0;
}

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static int device_rtc_init(struct pm80x_chip *chip,
				struct pm80x_platform_data *pdata)
{
	int ret;

	if (pdata) {
		rtc_devs[0].platform_data = pdata->rtc;
		rtc_devs[0].pdata_size =
				pdata->rtc ? sizeof(struct pm80x_rtc_pdata) : 0;
	}
	ret = mfd_add_devices(chip->dev, 0, &rtc_devs[0],
			      ARRAY_SIZE(rtc_devs), NULL, 0, NULL);
	if (ret) {
		dev_err(chip->dev, "Failed to add rtc subdev\n");
		return ret;
	}

	return 0;
}

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static int device_regulator_init(struct pm80x_chip *chip,
					   struct pm80x_platform_data *pdata)
{
	int ret;

	ret = mfd_add_devices(chip->dev, 0, &regulator_devs[0],
			      ARRAY_SIZE(regulator_devs), NULL, 0, NULL);
	if (ret) {
		dev_err(chip->dev, "Failed to add regulator subdev\n");
		return ret;
	}

	return 0;
}

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static int device_irq_init_800(struct pm80x_chip *chip)
{
	struct regmap *map = chip->regmap;
	unsigned long flags = IRQF_ONESHOT;
	int data, mask, ret = -EINVAL;

	if (!map || !chip->irq) {
		dev_err(chip->dev, "incorrect parameters\n");
		return -EINVAL;
	}

	/*
         * irq_mode defines the way of clearing interrupt. it's read-clear by
         * default.
         */
	mask =
	    PM800_WAKEUP2_INV_INT | PM800_WAKEUP2_INT_CLEAR |
	    PM800_WAKEUP2_INT_MASK;

	data = PM800_WAKEUP2_INT_CLEAR;
	ret = regmap_update_bits(map, PM800_WAKEUP2, mask, data);

	if (ret < 0)
		goto out;

	ret =
	    regmap_add_irq_chip(chip->regmap, chip->irq, flags, -1,
				chip->regmap_irq_chip, &chip->irq_data);

out:
	return ret;
}

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static void device_irq_exit_800(struct pm80x_chip *chip)
{
	regmap_del_irq_chip(chip->irq, chip->irq_data);
}

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static struct regmap_irq_chip pm800_irq_chip = {
	.name = "88pm800",
	.irqs = pm800_irqs,
	.num_irqs = ARRAY_SIZE(pm800_irqs),

	.num_regs = 4,
	.status_base = PM800_INT_STATUS1,
	.mask_base = PM800_INT_ENA_1,
	.ack_base = PM800_INT_STATUS1,
	.mask_invert = 1,
};



static int pm800_pages_init(struct pm80x_chip *chip)
{
	struct pm80x_subchip *subchip;
	struct i2c_client *client = chip->client;

	int ret = 0;

	subchip = chip->subchip;
	if (!subchip || !subchip->power_page_addr || !subchip->gpadc_page_addr)
		return -ENODEV;

	/* PM800 block power page */
	subchip->power_page = i2c_new_dummy(client->adapter,
					    subchip->power_page_addr);
	if (subchip->power_page == NULL) {
		ret = -ENODEV;
		goto out;
	}

	subchip->regmap_power = devm_regmap_init_i2c(subchip->power_page,
						     &pm80x_regmap_config);
	if (IS_ERR(subchip->regmap_power)) {
		ret = PTR_ERR(subchip->regmap_power);
		dev_err(chip->dev,
			"Failed to allocate regmap_power: %d\n", ret);
		goto out;
	}

	i2c_set_clientdata(subchip->power_page, chip);

	/* PM800 block GPADC */
	subchip->gpadc_page = i2c_new_dummy(client->adapter,
					    subchip->gpadc_page_addr);
	if (subchip->gpadc_page == NULL) {
		ret = -ENODEV;
		goto out;
	}

	subchip->regmap_gpadc = devm_regmap_init_i2c(subchip->gpadc_page,
						     &pm80x_regmap_config);
	if (IS_ERR(subchip->regmap_gpadc)) {
		ret = PTR_ERR(subchip->regmap_gpadc);
		dev_err(chip->dev,
			"Failed to allocate regmap_gpadc: %d\n", ret);
		goto out;
	}
	i2c_set_clientdata(subchip->gpadc_page, chip);

out:
	return ret;
}

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static void pm800_pages_exit(struct pm80x_chip *chip)
{
	struct pm80x_subchip *subchip;

	subchip = chip->subchip;

	if (subchip && subchip->power_page)
		i2c_unregister_device(subchip->power_page);

	if (subchip && subchip->gpadc_page)
		i2c_unregister_device(subchip->gpadc_page);
}

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static int device_800_init(struct pm80x_chip *chip,
				     struct pm80x_platform_data *pdata)
{
	int ret;
	unsigned int val;

	/*
         * alarm wake up bit will be clear in device_irq_init(),
         * read before that
         */
	ret = regmap_read(chip->regmap, PM800_RTC_CONTROL, &val);
	if (ret < 0) {
		dev_err(chip->dev, "Failed to read RTC register: %d\n", ret);
		goto out;
	}
	if (val & PM800_ALARM_WAKEUP) {
		if (pdata && pdata->rtc)
			pdata->rtc->rtc_wakeup = 1;
	}

	ret = device_gpadc_init(chip, pdata);
	if (ret < 0) {
		dev_err(chip->dev, "[%s]Failed to init gpadc\n", __func__);
		goto out;
	}

	chip->regmap_irq_chip = &pm800_irq_chip;

	ret = device_irq_init_800(chip);
	if (ret < 0) {
		dev_err(chip->dev, "[%s]Failed to init pm800 irq\n", __func__);
		goto out;
	}

	ret = device_onkey_init(chip, pdata);
	if (ret) {
		dev_err(chip->dev, "Failed to add onkey subdev\n");
		goto out_dev;
	}

	ret = device_rtc_init(chip, pdata);
	if (ret) {
		dev_err(chip->dev, "Failed to add rtc subdev\n");
		goto out;
	}

	ret = device_regulator_init(chip, pdata);
	if (ret) {
		dev_err(chip->dev, "Failed to add regulators subdev\n");
		goto out;
	}

	return 0;
out_dev:
	mfd_remove_devices(chip->dev);
	device_irq_exit_800(chip);
out:
	return ret;
}

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static int pm800_probe(struct i2c_client *client,
				 const struct i2c_device_id *id)
{
	int ret = 0;
	struct pm80x_chip *chip;
	struct pm80x_platform_data *pdata = dev_get_platdata(&client->dev);
	struct pm80x_subchip *subchip;

	ret = pm80x_init(client);
	if (ret) {
		dev_err(&client->dev, "pm800_init fail\n");
		goto out_init;
	}

	chip = i2c_get_clientdata(client);

	/* init subchip for PM800 */
	subchip =
	    devm_kzalloc(&client->dev, sizeof(struct pm80x_subchip),
			 GFP_KERNEL);
	if (!subchip) {
		ret = -ENOMEM;
		goto err_subchip_alloc;
	}

	/* pm800 has 2 addtional pages to support power and gpadc. */
	subchip->power_page_addr = client->addr + 1;
	subchip->gpadc_page_addr = client->addr + 2;
	chip->subchip = subchip;

	ret = pm800_pages_init(chip);
	if (ret) {
		dev_err(&client->dev, "pm800_pages_init failed!\n");
		goto err_device_init;
	}

	ret = device_800_init(chip, pdata);
	if (ret) {
		dev_err(chip->dev, "Failed to initialize 88pm800 devices\n");
		goto err_device_init;
	}

	if (pdata && pdata->plat_config)
		pdata->plat_config(chip, pdata);

	return 0;

err_device_init:
	pm800_pages_exit(chip);
err_subchip_alloc:
	pm80x_deinit();
out_init:
	return ret;
}

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static int pm800_remove(struct i2c_client *client)
{
	struct pm80x_chip *chip = i2c_get_clientdata(client);

	mfd_remove_devices(chip->dev);
	device_irq_exit_800(chip);

	pm800_pages_exit(chip);
	pm80x_deinit();

	return 0;
}

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static struct i2c_driver pm800_driver = {
	.driver = {
		.name = "88PM800",
		.pm = &pm80x_pm_ops,
                },
	.probe = pm800_probe,
	.remove = pm800_remove,
	.id_table = pm80x_id_table,
};



static int __init pm800_i2c_init(void)
{
	return i2c_add_driver(&pm800_driver);
}
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1
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subsys_initcall(pm800_i2c_init);



static void __exit pm800_i2c_exit(void)
{
	i2c_del_driver(&pm800_driver);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Qiao Zhou
15
100.00%
1
100.00%
Total
15
100.00%
1
100.00%


module_exit(pm800_i2c_exit);

MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM800");
MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
MODULE_LICENSE("GPL");
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Qiao Zhou
1892
79.70%
1
6.25%
Chao Xie
447
18.83%
8
50.00%
Yi Zhang
16
0.67%
2
12.50%
Axel Lin
8
0.34%
1
6.25%
Jingoo Han
4
0.17%
1
6.25%
Samuel Ortiz
4
0.17%
1
6.25%
Geert Uytterhoeven
2
0.08%
1
6.25%
Krzysztof Kozlowski
1
0.04%
1
6.25%
Total
2374
100.00%
16
100.00%
Directory: drivers/mfd

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