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path: root/drivers/mfd/bd9571mwv.c
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Diffstat (limited to 'drivers/mfd/bd9571mwv.c')
-rw-r--r--drivers/mfd/bd9571mwv.c230
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");