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Diffstat (limited to 'drivers/mfd/tps65217.c')
-rw-r--r--drivers/mfd/tps65217.c422
1 files changed, 422 insertions, 0 deletions
diff --git a/drivers/mfd/tps65217.c b/drivers/mfd/tps65217.c
new file mode 100644
index 0000000000..029ecc32f0
--- /dev/null
+++ b/drivers/mfd/tps65217.c
@@ -0,0 +1,422 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * tps65217.c
+ *
+ * TPS65217 chip family multi-function driver
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#include <linux/mfd/core.h>
+#include <linux/mfd/tps65217.h>
+
+static const struct resource charger_resources[] = {
+ DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_AC, "AC"),
+ DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_USB, "USB"),
+};
+
+static const struct resource pb_resources[] = {
+ DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_PB, "PB"),
+};
+
+static void tps65217_irq_lock(struct irq_data *data)
+{
+ struct tps65217 *tps = irq_data_get_irq_chip_data(data);
+
+ mutex_lock(&tps->irq_lock);
+}
+
+static void tps65217_irq_sync_unlock(struct irq_data *data)
+{
+ struct tps65217 *tps = irq_data_get_irq_chip_data(data);
+ int ret;
+
+ ret = tps65217_set_bits(tps, TPS65217_REG_INT, TPS65217_INT_MASK,
+ tps->irq_mask, TPS65217_PROTECT_NONE);
+ if (ret != 0)
+ dev_err(tps->dev, "Failed to sync IRQ masks\n");
+
+ mutex_unlock(&tps->irq_lock);
+}
+
+static void tps65217_irq_enable(struct irq_data *data)
+{
+ struct tps65217 *tps = irq_data_get_irq_chip_data(data);
+ u8 mask = BIT(data->hwirq) << TPS65217_INT_SHIFT;
+
+ tps->irq_mask &= ~mask;
+}
+
+static void tps65217_irq_disable(struct irq_data *data)
+{
+ struct tps65217 *tps = irq_data_get_irq_chip_data(data);
+ u8 mask = BIT(data->hwirq) << TPS65217_INT_SHIFT;
+
+ tps->irq_mask |= mask;
+}
+
+static struct irq_chip tps65217_irq_chip = {
+ .name = "tps65217",
+ .irq_bus_lock = tps65217_irq_lock,
+ .irq_bus_sync_unlock = tps65217_irq_sync_unlock,
+ .irq_enable = tps65217_irq_enable,
+ .irq_disable = tps65217_irq_disable,
+};
+
+static struct mfd_cell tps65217s[] = {
+ {
+ .name = "tps65217-pmic",
+ .of_compatible = "ti,tps65217-pmic",
+ },
+ {
+ .name = "tps65217-bl",
+ .of_compatible = "ti,tps65217-bl",
+ },
+ {
+ .name = "tps65217-charger",
+ .num_resources = ARRAY_SIZE(charger_resources),
+ .resources = charger_resources,
+ .of_compatible = "ti,tps65217-charger",
+ },
+ {
+ .name = "tps65217-pwrbutton",
+ .num_resources = ARRAY_SIZE(pb_resources),
+ .resources = pb_resources,
+ .of_compatible = "ti,tps65217-pwrbutton",
+ },
+};
+
+static irqreturn_t tps65217_irq_thread(int irq, void *data)
+{
+ struct tps65217 *tps = data;
+ unsigned int status;
+ bool handled = false;
+ int i;
+ int ret;
+
+ ret = tps65217_reg_read(tps, TPS65217_REG_INT, &status);
+ if (ret < 0) {
+ dev_err(tps->dev, "Failed to read IRQ status: %d\n",
+ ret);
+ return IRQ_NONE;
+ }
+
+ for (i = 0; i < TPS65217_NUM_IRQ; i++) {
+ if (status & BIT(i)) {
+ handle_nested_irq(irq_find_mapping(tps->irq_domain, i));
+ handled = true;
+ }
+ }
+
+ if (handled)
+ return IRQ_HANDLED;
+
+ return IRQ_NONE;
+}
+
+static int tps65217_irq_map(struct irq_domain *h, unsigned int virq,
+ irq_hw_number_t hw)
+{
+ struct tps65217 *tps = h->host_data;
+
+ irq_set_chip_data(virq, tps);
+ irq_set_chip_and_handler(virq, &tps65217_irq_chip, handle_edge_irq);
+ irq_set_nested_thread(virq, 1);
+ irq_set_parent(virq, tps->irq);
+ irq_set_noprobe(virq);
+
+ return 0;
+}
+
+static const struct irq_domain_ops tps65217_irq_domain_ops = {
+ .map = tps65217_irq_map,
+};
+
+static int tps65217_irq_init(struct tps65217 *tps, int irq)
+{
+ int ret;
+
+ mutex_init(&tps->irq_lock);
+ tps->irq = irq;
+
+ /* Mask all interrupt sources */
+ tps->irq_mask = TPS65217_INT_MASK;
+ tps65217_set_bits(tps, TPS65217_REG_INT, TPS65217_INT_MASK,
+ TPS65217_INT_MASK, TPS65217_PROTECT_NONE);
+
+ tps->irq_domain = irq_domain_add_linear(tps->dev->of_node,
+ TPS65217_NUM_IRQ, &tps65217_irq_domain_ops, tps);
+ if (!tps->irq_domain) {
+ dev_err(tps->dev, "Could not create IRQ domain\n");
+ return -ENOMEM;
+ }
+
+ ret = devm_request_threaded_irq(tps->dev, irq, NULL,
+ tps65217_irq_thread, IRQF_ONESHOT,
+ "tps65217-irq", tps);
+ if (ret) {
+ dev_err(tps->dev, "Failed to request IRQ %d: %d\n",
+ irq, ret);
+ return ret;
+ }
+
+ enable_irq_wake(irq);
+
+ return 0;
+}
+
+/**
+ * tps65217_reg_read: Read a single tps65217 register.
+ *
+ * @tps: Device to read from.
+ * @reg: Register to read.
+ * @val: Contians the value
+ */
+int tps65217_reg_read(struct tps65217 *tps, unsigned int reg,
+ unsigned int *val)
+{
+ return regmap_read(tps->regmap, reg, val);
+}
+EXPORT_SYMBOL_GPL(tps65217_reg_read);
+
+/**
+ * tps65217_reg_write: Write a single tps65217 register.
+ *
+ * @tps: Device to write to.
+ * @reg: Register to write to.
+ * @val: Value to write.
+ * @level: Password protected level
+ */
+int tps65217_reg_write(struct tps65217 *tps, unsigned int reg,
+ unsigned int val, unsigned int level)
+{
+ int ret;
+ unsigned int xor_reg_val;
+
+ switch (level) {
+ case TPS65217_PROTECT_NONE:
+ return regmap_write(tps->regmap, reg, val);
+ case TPS65217_PROTECT_L1:
+ xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK;
+ ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
+ xor_reg_val);
+ if (ret < 0)
+ return ret;
+
+ return regmap_write(tps->regmap, reg, val);
+ case TPS65217_PROTECT_L2:
+ xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK;
+ ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
+ xor_reg_val);
+ if (ret < 0)
+ return ret;
+ ret = regmap_write(tps->regmap, reg, val);
+ if (ret < 0)
+ return ret;
+ ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
+ xor_reg_val);
+ if (ret < 0)
+ return ret;
+ return regmap_write(tps->regmap, reg, val);
+ default:
+ return -EINVAL;
+ }
+}
+EXPORT_SYMBOL_GPL(tps65217_reg_write);
+
+/**
+ * tps65217_update_bits: Modify bits w.r.t mask, val and level.
+ *
+ * @tps: Device to write to.
+ * @reg: Register to read-write to.
+ * @mask: Mask.
+ * @val: Value to write.
+ * @level: Password protected level
+ */
+static int tps65217_update_bits(struct tps65217 *tps, unsigned int reg,
+ unsigned int mask, unsigned int val, unsigned int level)
+{
+ int ret;
+ unsigned int data;
+
+ ret = tps65217_reg_read(tps, reg, &data);
+ if (ret) {
+ dev_err(tps->dev, "Read from reg 0x%x failed\n", reg);
+ return ret;
+ }
+
+ data &= ~mask;
+ data |= val & mask;
+
+ ret = tps65217_reg_write(tps, reg, data, level);
+ if (ret)
+ dev_err(tps->dev, "Write for reg 0x%x failed\n", reg);
+
+ return ret;
+}
+
+int tps65217_set_bits(struct tps65217 *tps, unsigned int reg,
+ unsigned int mask, unsigned int val, unsigned int level)
+{
+ return tps65217_update_bits(tps, reg, mask, val, level);
+}
+EXPORT_SYMBOL_GPL(tps65217_set_bits);
+
+int tps65217_clear_bits(struct tps65217 *tps, unsigned int reg,
+ unsigned int mask, unsigned int level)
+{
+ return tps65217_update_bits(tps, reg, mask, 0, level);
+}
+EXPORT_SYMBOL_GPL(tps65217_clear_bits);
+
+static bool tps65217_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case TPS65217_REG_INT:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct regmap_config tps65217_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = TPS65217_REG_MAX,
+ .volatile_reg = tps65217_volatile_reg,
+};
+
+static const struct of_device_id tps65217_of_match[] = {
+ { .compatible = "ti,tps65217"},
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, tps65217_of_match);
+
+static int tps65217_probe(struct i2c_client *client)
+{
+ struct tps65217 *tps;
+ unsigned int version;
+ bool status_off = false;
+ int ret;
+
+ status_off = of_property_read_bool(client->dev.of_node,
+ "ti,pmic-shutdown-controller");
+
+ tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
+ if (!tps)
+ return -ENOMEM;
+
+ i2c_set_clientdata(client, tps);
+ tps->dev = &client->dev;
+
+ tps->regmap = devm_regmap_init_i2c(client, &tps65217_regmap_config);
+ if (IS_ERR(tps->regmap)) {
+ ret = PTR_ERR(tps->regmap);
+ dev_err(tps->dev, "Failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ if (client->irq) {
+ tps65217_irq_init(tps, client->irq);
+ } else {
+ int i;
+
+ /* Don't tell children about IRQ resources which won't fire */
+ for (i = 0; i < ARRAY_SIZE(tps65217s); i++)
+ tps65217s[i].num_resources = 0;
+ }
+
+ ret = devm_mfd_add_devices(tps->dev, -1, tps65217s,
+ ARRAY_SIZE(tps65217s), NULL, 0,
+ tps->irq_domain);
+ if (ret < 0) {
+ dev_err(tps->dev, "mfd_add_devices failed: %d\n", ret);
+ return ret;
+ }
+
+ ret = tps65217_reg_read(tps, TPS65217_REG_CHIPID, &version);
+ if (ret < 0) {
+ dev_err(tps->dev, "Failed to read revision register: %d\n",
+ ret);
+ return ret;
+ }
+
+ /* Set the PMIC to shutdown on PWR_EN toggle */
+ if (status_off) {
+ ret = tps65217_set_bits(tps, TPS65217_REG_STATUS,
+ TPS65217_STATUS_OFF, TPS65217_STATUS_OFF,
+ TPS65217_PROTECT_NONE);
+ if (ret)
+ dev_warn(tps->dev, "unable to set the status OFF\n");
+ }
+
+ dev_info(tps->dev, "TPS65217 ID %#x version 1.%d\n",
+ (version & TPS65217_CHIPID_CHIP_MASK) >> 4,
+ version & TPS65217_CHIPID_REV_MASK);
+
+ return 0;
+}
+
+static void tps65217_remove(struct i2c_client *client)
+{
+ struct tps65217 *tps = i2c_get_clientdata(client);
+ unsigned int virq;
+ int i;
+
+ for (i = 0; i < TPS65217_NUM_IRQ; i++) {
+ virq = irq_find_mapping(tps->irq_domain, i);
+ if (virq)
+ irq_dispose_mapping(virq);
+ }
+
+ irq_domain_remove(tps->irq_domain);
+ tps->irq_domain = NULL;
+}
+
+static const struct i2c_device_id tps65217_id_table[] = {
+ {"tps65217", TPS65217},
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(i2c, tps65217_id_table);
+
+static struct i2c_driver tps65217_driver = {
+ .driver = {
+ .name = "tps65217",
+ .of_match_table = tps65217_of_match,
+ },
+ .id_table = tps65217_id_table,
+ .probe = tps65217_probe,
+ .remove = tps65217_remove,
+};
+
+static int __init tps65217_init(void)
+{
+ return i2c_add_driver(&tps65217_driver);
+}
+subsys_initcall(tps65217_init);
+
+static void __exit tps65217_exit(void)
+{
+ i2c_del_driver(&tps65217_driver);
+}
+module_exit(tps65217_exit);
+
+MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
+MODULE_DESCRIPTION("TPS65217 chip family multi-function driver");
+MODULE_LICENSE("GPL v2");