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