Merge "mfd: qcom-i2c-pmic: Add retry mechanism for slow slave responding"

/* Copyright (c) 2016 The Linux Foundation. All rights reserved.

/* Copyright (c) 2016-2017 The Linux Foundation. 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 and

	return rc;

}

#define MAX_I2C_RETRIES	3

static int i2c_pmic_read(struct regmap *map, unsigned int reg, void *val,

			size_t val_count)

{

	int rc, retries = 0;

	do {

		rc = regmap_bulk_read(map, reg, val, val_count);

	} while (rc == -ENOTCONN && retries++ < MAX_I2C_RETRIES);

	if (retries > 1)

		pr_err("i2c_pmic_read failed for %d retries, rc = %d\n",

			retries - 1, rc);

	return rc;

}

static int i2c_pmic_determine_initial_status(struct i2c_pmic *chip)

{

	int rc, i;

	for (i = 0; i < chip->num_periphs; i++) {

		rc = regmap_bulk_read(chip->regmap,

		rc = i2c_pmic_read(chip->regmap,

				chip->periph[i].addr | INT_SET_TYPE_OFFSET,

				chip->periph[i].cached, IRQ_MAX_REGS);

		if (rc < 0) {