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/*
* ROHM BD9571MWV-M MFD driver
*
* Copyright (C) 2017 Marek Vasut <marek.vasut+renesas@gmail.com>
*
* 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 "as is" WITHOUT ANY WARRANTY of any
* kind, whether expressed or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License version 2 for more details.
*
* Based on the TPS65086 driver
*/
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/mfd/bd9571mwv.h>
static const struct mfd_cell bd9571mwv_cells[] = {
{ .name = "bd9571mwv-regulator", },
{ .name = "bd9571mwv-gpio", },
};
static const struct regmap_range bd9571mwv_readable_yes_ranges[] = {
regmap_reg_range(BD9571MWV_VENDOR_CODE, BD9571MWV_PRODUCT_REVISION),
regmap_reg_range(BD9571MWV_BKUP_MODE_CNT, BD9571MWV_BKUP_MODE_CNT),
regmap_reg_range(BD9571MWV_AVS_SET_MONI, BD9571MWV_AVS_DVFS_VID(3)),
regmap_reg_range(BD9571MWV_VD18_VID, BD9571MWV_VD33_VID),
regmap_reg_range(BD9571MWV_DVFS_VINIT, BD9571MWV_DVFS_VINIT),
regmap_reg_range(BD9571MWV_DVFS_SETVMAX, BD9571MWV_DVFS_MONIVDAC),
regmap_reg_range(BD9571MWV_GPIO_IN, BD9571MWV_GPIO_IN),
regmap_reg_range(BD9571MWV_GPIO_INT, BD9571MWV_GPIO_INTMASK),
regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTMASK),
};
static const struct regmap_access_table bd9571mwv_readable_table = {
.yes_ranges = bd9571mwv_readable_yes_ranges,
.n_yes_ranges = ARRAY_SIZE(bd9571mwv_readable_yes_ranges),
};
static const struct regmap_range bd9571mwv_writable_yes_ranges[] = {
regmap_reg_range(BD9571MWV_BKUP_MODE_CNT, BD9571MWV_BKUP_MODE_CNT),
regmap_reg_range(BD9571MWV_AVS_VD09_VID(0), BD9571MWV_AVS_VD09_VID(3)),
regmap_reg_range(BD9571MWV_DVFS_SETVID, BD9571MWV_DVFS_SETVID),
regmap_reg_range(BD9571MWV_GPIO_DIR, BD9571MWV_GPIO_OUT),
regmap_reg_range(BD9571MWV_GPIO_INT_SET, BD9571MWV_GPIO_INTMASK),
regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTMASK),
};
static const struct regmap_access_table bd9571mwv_writable_table = {
.yes_ranges = bd9571mwv_writable_yes_ranges,
.n_yes_ranges = ARRAY_SIZE(bd9571mwv_writable_yes_ranges),
};
static const struct regmap_range bd9571mwv_volatile_yes_ranges[] = {
regmap_reg_range(BD9571MWV_GPIO_IN, BD9571MWV_GPIO_IN),
regmap_reg_range(BD9571MWV_GPIO_INT, BD9571MWV_GPIO_INT),
regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTREQ),
};
static const struct regmap_access_table bd9571mwv_volatile_table = {
.yes_ranges = bd9571mwv_volatile_yes_ranges,
.n_yes_ranges = ARRAY_SIZE(bd9571mwv_volatile_yes_ranges),
};
static const struct regmap_config bd9571mwv_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.cache_type = REGCACHE_RBTREE,
.rd_table = &bd9571mwv_readable_table,
.wr_table = &bd9571mwv_writable_table,
.volatile_table = &bd9571mwv_volatile_table,
.max_register = 0xff,
};
static const struct regmap_irq bd9571mwv_irqs[] = {
REGMAP_IRQ_REG(BD9571MWV_IRQ_MD1, 0,
BD9571MWV_INT_INTREQ_MD1_INT),
REGMAP_IRQ_REG(BD9571MWV_IRQ_MD2_E1, 0,
BD9571MWV_INT_INTREQ_MD2_E1_INT),
REGMAP_IRQ_REG(BD9571MWV_IRQ_MD2_E2, 0,
BD9571MWV_INT_INTREQ_MD2_E2_INT),
REGMAP_IRQ_REG(BD9571MWV_IRQ_PROT_ERR, 0,
BD9571MWV_INT_INTREQ_PROT_ERR_INT),
REGMAP_IRQ_REG(BD9571MWV_IRQ_GP, 0,
BD9571MWV_INT_INTREQ_GP_INT),
REGMAP_IRQ_REG(BD9571MWV_IRQ_128H_OF, 0,
BD9571MWV_INT_INTREQ_128H_OF_INT),
REGMAP_IRQ_REG(BD9571MWV_IRQ_WDT_OF, 0,
BD9571MWV_INT_INTREQ_WDT_OF_INT),
REGMAP_IRQ_REG(BD9571MWV_IRQ_BKUP_TRG, 0,
BD9571MWV_INT_INTREQ_BKUP_TRG_INT),
};
static struct regmap_irq_chip bd9571mwv_irq_chip = {
.name = "bd9571mwv",
.status_base = BD9571MWV_INT_INTREQ,
.mask_base = BD9571MWV_INT_INTMASK,
.ack_base = BD9571MWV_INT_INTREQ,
.init_ack_masked = true,
.num_regs = 1,
.irqs = bd9571mwv_irqs,
.num_irqs = ARRAY_SIZE(bd9571mwv_irqs),
};
static int bd9571mwv_identify(struct bd9571mwv *bd)
{
struct device *dev = bd->dev;
unsigned int value;
int ret;
ret = regmap_read(bd->regmap, BD9571MWV_VENDOR_CODE, &value);
if (ret) {
dev_err(dev, "Failed to read vendor code register (ret=%i)\n",
ret);
return ret;
}
if (value != BD9571MWV_VENDOR_CODE_VAL) {
dev_err(dev, "Invalid vendor code ID %02x (expected %02x)\n",
value, BD9571MWV_VENDOR_CODE_VAL);
return -EINVAL;
}
ret = regmap_read(bd->regmap, BD9571MWV_PRODUCT_CODE, &value);
if (ret) {
dev_err(dev, "Failed to read product code register (ret=%i)\n",
ret);
return ret;
}
if (value != BD9571MWV_PRODUCT_CODE_VAL) {
dev_err(dev, "Invalid product code ID %02x (expected %02x)\n",
value, BD9571MWV_PRODUCT_CODE_VAL);
return -EINVAL;
}
ret = regmap_read(bd->regmap, BD9571MWV_PRODUCT_REVISION, &value);
if (ret) {
dev_err(dev, "Failed to read revision register (ret=%i)\n",
ret);
return ret;
}
dev_info(dev, "Device: BD9571MWV rev. %d\n", value & 0xff);
return 0;
}
static int bd9571mwv_probe(struct i2c_client *client,
const struct i2c_device_id *ids)
{
struct bd9571mwv *bd;
int ret;
bd = devm_kzalloc(&client->dev, sizeof(*bd), GFP_KERNEL);
if (!bd)
return -ENOMEM;
i2c_set_clientdata(client, bd);
bd->dev = &client->dev;
bd->irq = client->irq;
bd->regmap = devm_regmap_init_i2c(client, &bd9571mwv_regmap_config);
if (IS_ERR(bd->regmap)) {
dev_err(bd->dev, "Failed to initialize register map\n");
return PTR_ERR(bd->regmap);
}
ret = bd9571mwv_identify(bd);
if (ret)
return ret;
ret = regmap_add_irq_chip(bd->regmap, bd->irq, IRQF_ONESHOT, 0,
&bd9571mwv_irq_chip, &bd->irq_data);
if (ret) {
dev_err(bd->dev, "Failed to register IRQ chip\n");
return ret;
}
ret = mfd_add_devices(bd->dev, PLATFORM_DEVID_AUTO, bd9571mwv_cells,
ARRAY_SIZE(bd9571mwv_cells), NULL, 0,
regmap_irq_get_domain(bd->irq_data));
if (ret) {
regmap_del_irq_chip(bd->irq, bd->irq_data);
return ret;
}
return 0;
}
static int bd9571mwv_remove(struct i2c_client *client)
{
struct bd9571mwv *bd = i2c_get_clientdata(client);
regmap_del_irq_chip(bd->irq, bd->irq_data);
return 0;
}
static const struct of_device_id bd9571mwv_of_match_table[] = {
{ .compatible = "rohm,bd9571mwv", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, bd9571mwv_of_match_table);
static const struct i2c_device_id bd9571mwv_id_table[] = {
{ "bd9571mwv", 0 },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(i2c, bd9571mwv_id_table);
static struct i2c_driver bd9571mwv_driver = {
.driver = {
.name = "bd9571mwv",
.of_match_table = bd9571mwv_of_match_table,
},
.probe = bd9571mwv_probe,
.remove = bd9571mwv_remove,
.id_table = bd9571mwv_id_table,
};
module_i2c_driver(bd9571mwv_driver);
MODULE_AUTHOR("Marek Vasut <marek.vasut+renesas@gmail.com>");
MODULE_DESCRIPTION("BD9571MWV PMIC Driver");
MODULE_LICENSE("GPL v2");
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