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@@ -1,5 +1,5 @@
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/*
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- * da9211-regulator.c - Regulator device driver for DA9211
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+ * da9211-regulator.c - Regulator device driver for DA9211/DA9213
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* Copyright (C) 2014 Dialog Semiconductor Ltd.
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*
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* This library is free software; you can redistribute it and/or
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@@ -24,9 +24,14 @@
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#include <linux/regmap.h>
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#include <linux/irq.h>
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#include <linux/interrupt.h>
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+#include <linux/regulator/of_regulator.h>
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#include <linux/regulator/da9211.h>
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#include "da9211-regulator.h"
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+/* DEVICE IDs */
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+#define DA9211_DEVICE_ID 0x22
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+#define DA9213_DEVICE_ID 0x23
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+
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#define DA9211_BUCK_MODE_SLEEP 1
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#define DA9211_BUCK_MODE_SYNC 2
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#define DA9211_BUCK_MODE_AUTO 3
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@@ -42,6 +47,7 @@ struct da9211 {
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struct regulator_dev *rdev[DA9211_MAX_REGULATORS];
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int num_regulator;
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int chip_irq;
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+ int chip_id;
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};
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static const struct regmap_range_cfg da9211_regmap_range[] = {
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@@ -52,14 +58,14 @@ static const struct regmap_range_cfg da9211_regmap_range[] = {
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.window_start = 0,
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.window_len = 256,
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.range_min = 0,
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- .range_max = 2*256,
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+ .range_max = 5*128,
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},
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};
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static const struct regmap_config da9211_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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- .max_register = 2 * 256,
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+ .max_register = 5 * 128,
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.ranges = da9211_regmap_range,
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.num_ranges = ARRAY_SIZE(da9211_regmap_range),
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};
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@@ -69,11 +75,20 @@ static const struct regmap_config da9211_regmap_config = {
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#define DA9211_MAX_MV 1570
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#define DA9211_STEP_MV 10
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-/* Current limits for buck (uA) indices corresponds with register values */
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+/* Current limits for DA9211 buck (uA) indices
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+ * corresponds with register values
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+ */
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static const int da9211_current_limits[] = {
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2000000, 2200000, 2400000, 2600000, 2800000, 3000000, 3200000, 3400000,
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3600000, 3800000, 4000000, 4200000, 4400000, 4600000, 4800000, 5000000
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};
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+/* Current limits for DA9213 buck (uA) indices
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+ * corresponds with register values
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+ */
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+static const int da9213_current_limits[] = {
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+ 3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000,
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+ 4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
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+};
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static unsigned int da9211_buck_get_mode(struct regulator_dev *rdev)
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{
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@@ -129,12 +144,26 @@ static int da9211_set_current_limit(struct regulator_dev *rdev, int min,
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{
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int id = rdev_get_id(rdev);
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struct da9211 *chip = rdev_get_drvdata(rdev);
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- int i;
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+ int i, max_size;
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+ const int *current_limits;
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+
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+ switch (chip->chip_id) {
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+ case DA9211:
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+ current_limits = da9211_current_limits;
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+ max_size = ARRAY_SIZE(da9211_current_limits)-1;
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+ break;
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+ case DA9213:
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+ current_limits = da9213_current_limits;
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+ max_size = ARRAY_SIZE(da9213_current_limits)-1;
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+ break;
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+ default:
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+ return -EINVAL;
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+ }
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/* search for closest to maximum */
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- for (i = ARRAY_SIZE(da9211_current_limits)-1; i >= 0; i--) {
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- if (min <= da9211_current_limits[i] &&
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- max >= da9211_current_limits[i]) {
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+ for (i = max_size; i >= 0; i--) {
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+ if (min <= current_limits[i] &&
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+ max >= current_limits[i]) {
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return regmap_update_bits(chip->regmap,
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DA9211_REG_BUCK_ILIM,
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(0x0F << id*4), (i << id*4));
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@@ -150,14 +179,28 @@ static int da9211_get_current_limit(struct regulator_dev *rdev)
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struct da9211 *chip = rdev_get_drvdata(rdev);
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unsigned int data;
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int ret;
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+ const int *current_limits;
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+
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+ switch (chip->chip_id) {
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+ case DA9211:
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+ current_limits = da9211_current_limits;
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+ break;
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+ case DA9213:
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+ current_limits = da9213_current_limits;
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+ break;
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+ default:
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+ return -EINVAL;
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+ }
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ret = regmap_read(chip->regmap, DA9211_REG_BUCK_ILIM, &data);
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if (ret < 0)
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return ret;
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- /* select one of 16 values: 0000 (2000mA) to 1111 (5000mA) */
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+ /* select one of 16 values: 0000 (2000mA or 3000mA)
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+ * to 1111 (5000mA or 6000mA).
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+ */
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data = (data >> id*4) & 0x0F;
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- return da9211_current_limits[data];
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+ return current_limits[data];
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}
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static struct regulator_ops da9211_buck_ops = {
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@@ -194,6 +237,59 @@ static struct regulator_desc da9211_regulators[] = {
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DA9211_BUCK(BUCKB),
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};
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+#ifdef CONFIG_OF
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+static struct of_regulator_match da9211_matches[] = {
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+ [DA9211_ID_BUCKA] = { .name = "BUCKA" },
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+ [DA9211_ID_BUCKB] = { .name = "BUCKB" },
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+ };
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+
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+static struct da9211_pdata *da9211_parse_regulators_dt(
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+ struct device *dev)
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+{
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+ struct da9211_pdata *pdata;
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+ struct device_node *node;
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+ int i, num, n;
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+
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+ node = of_get_child_by_name(dev->of_node, "regulators");
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+ if (!node) {
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+ dev_err(dev, "regulators node not found\n");
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+ return ERR_PTR(-ENODEV);
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+ }
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+
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+ num = of_regulator_match(dev, node, da9211_matches,
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+ ARRAY_SIZE(da9211_matches));
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+ of_node_put(node);
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+ if (num < 0) {
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+ dev_err(dev, "Failed to match regulators\n");
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+ return ERR_PTR(-EINVAL);
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+ }
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+
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+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
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+ if (!pdata)
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+ return ERR_PTR(-ENOMEM);
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+
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+ pdata->num_buck = num;
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+
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+ n = 0;
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+ for (i = 0; i < ARRAY_SIZE(da9211_matches); i++) {
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+ if (!da9211_matches[i].init_data)
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+ continue;
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+
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+ pdata->init_data[n] = da9211_matches[i].init_data;
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+
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+ n++;
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+ }
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+
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+ return pdata;
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+}
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+#else
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+static struct da9211_pdata *da9211_parse_regulators_dt(
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+ struct device *dev)
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+{
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+ return ERR_PTR(-ENODEV);
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+}
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+#endif
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+
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static irqreturn_t da9211_irq_handler(int irq, void *data)
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{
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struct da9211 *chip = data;
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@@ -264,13 +360,11 @@ static int da9211_regulator_init(struct da9211 *chip)
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}
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for (i = 0; i < chip->num_regulator; i++) {
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- if (chip->pdata)
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- config.init_data =
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- &(chip->pdata->init_data[i]);
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-
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+ config.init_data = chip->pdata->init_data[i];
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config.dev = chip->dev;
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config.driver_data = chip;
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config.regmap = chip->regmap;
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+ config.of_node = chip->dev->of_node;
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chip->rdev[i] = devm_regulator_register(chip->dev,
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&da9211_regulators[i], &config);
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@@ -293,6 +387,7 @@ static int da9211_regulator_init(struct da9211 *chip)
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return 0;
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}
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+
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/*
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* I2C driver interface functions
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*/
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@@ -301,14 +396,17 @@ static int da9211_i2c_probe(struct i2c_client *i2c,
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{
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struct da9211 *chip;
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int error, ret;
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+ unsigned int data;
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chip = devm_kzalloc(&i2c->dev, sizeof(struct da9211), GFP_KERNEL);
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+ if (!chip)
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+ return -ENOMEM;
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chip->dev = &i2c->dev;
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chip->regmap = devm_regmap_init_i2c(i2c, &da9211_regmap_config);
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if (IS_ERR(chip->regmap)) {
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error = PTR_ERR(chip->regmap);
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- dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
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+ dev_err(chip->dev, "Failed to allocate register map: %d\n",
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error);
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return error;
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}
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@@ -316,11 +414,33 @@ static int da9211_i2c_probe(struct i2c_client *i2c,
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i2c_set_clientdata(i2c, chip);
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chip->pdata = i2c->dev.platform_data;
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- if (!chip->pdata) {
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- dev_err(&i2c->dev, "No platform init data supplied\n");
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+
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+ ret = regmap_read(chip->regmap, DA9211_REG_DEVICE_ID, &data);
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+ if (ret < 0) {
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+ dev_err(chip->dev, "Failed to read DEVICE_ID reg: %d\n", ret);
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+ return ret;
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+ }
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+
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+ switch (data) {
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+ case DA9211_DEVICE_ID:
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+ chip->chip_id = DA9211;
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+ break;
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+ case DA9213_DEVICE_ID:
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+ chip->chip_id = DA9213;
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+ break;
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+ default:
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+ dev_err(chip->dev, "Unsupported device id = 0x%x.\n", data);
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return -ENODEV;
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}
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+ if (!chip->pdata)
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+ chip->pdata = da9211_parse_regulators_dt(chip->dev);
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+
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+ if (IS_ERR(chip->pdata)) {
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+ dev_err(chip->dev, "No regulators defined for the platform\n");
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+ return PTR_ERR(chip->pdata);
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+ }
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+
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chip->chip_irq = i2c->irq;
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if (chip->chip_irq != 0) {
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@@ -340,22 +460,32 @@ static int da9211_i2c_probe(struct i2c_client *i2c,
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ret = da9211_regulator_init(chip);
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if (ret < 0)
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- dev_err(&i2c->dev, "Failed to initialize regulator: %d\n", ret);
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+ dev_err(chip->dev, "Failed to initialize regulator: %d\n", ret);
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return ret;
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}
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static const struct i2c_device_id da9211_i2c_id[] = {
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- {"da9211", 0},
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+ {"da9211", DA9211},
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+ {"da9213", DA9213},
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{},
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};
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-
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MODULE_DEVICE_TABLE(i2c, da9211_i2c_id);
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+#ifdef CONFIG_OF
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+static const struct of_device_id da9211_dt_ids[] = {
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+ { .compatible = "dlg,da9211", .data = &da9211_i2c_id[0] },
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+ { .compatible = "dlg,da9213", .data = &da9211_i2c_id[1] },
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+ {},
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+};
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+MODULE_DEVICE_TABLE(of, da9211_dt_ids);
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+#endif
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+
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static struct i2c_driver da9211_regulator_driver = {
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.driver = {
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.name = "da9211",
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.owner = THIS_MODULE,
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+ .of_match_table = of_match_ptr(da9211_dt_ids),
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},
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.probe = da9211_i2c_probe,
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.id_table = da9211_i2c_id,
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@@ -364,5 +494,5 @@ static struct i2c_driver da9211_regulator_driver = {
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module_i2c_driver(da9211_regulator_driver);
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MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
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-MODULE_DESCRIPTION("Regulator device driver for Dialog DA9211");
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+MODULE_DESCRIPTION("Regulator device driver for Dialog DA9211/DA9213");
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MODULE_LICENSE("GPL v2");
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Mark Brown