diff options
Diffstat (limited to 'drivers/mfd/bd9571mwv.c')
| -rw-r--r-- | drivers/mfd/bd9571mwv.c | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/drivers/mfd/bd9571mwv.c b/drivers/mfd/bd9571mwv.c new file mode 100644 index 000000000000..64e088dfe7b0 --- /dev/null +++ b/drivers/mfd/bd9571mwv.c @@ -0,0 +1,230 @@ +/* + * 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_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_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"); |