--- /dev/null
+/*
+ * Core driver for TI TPS6586x PMIC family
+ *
+ * Copyright (c) 2010 CompuLab Ltd.
+ * Mike Rapoport <mike@compulab.co.il>
+ *
+ * Based on da903x.c.
+ * Copyright (C) 2008 Compulab, Ltd.
+ * Mike Rapoport <mike@compulab.co.il>
+ * Copyright (C) 2006-2008 Marvell International Ltd.
+ * Eric Miao <eric.miao@marvell.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.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/of.h>
+
+#include <linux/mfd/core.h>
+#include <linux/mfd/tps6586x.h>
+
+#define TPS6586X_SUPPLYENE 0x14
+#define EXITSLREQ_BIT BIT(1)
+#define SLEEP_MODE_BIT BIT(3)
+
+/* interrupt control registers */
+#define TPS6586X_INT_ACK1 0xb5
+#define TPS6586X_INT_ACK2 0xb6
+#define TPS6586X_INT_ACK3 0xb7
+#define TPS6586X_INT_ACK4 0xb8
+
+/* interrupt mask registers */
+#define TPS6586X_INT_MASK1 0xb0
+#define TPS6586X_INT_MASK2 0xb1
+#define TPS6586X_INT_MASK3 0xb2
+#define TPS6586X_INT_MASK4 0xb3
+#define TPS6586X_INT_MASK5 0xb4
+
+/* device id */
+#define TPS6586X_VERSIONCRC 0xcd
+
+/* Maximum register */
+#define TPS6586X_MAX_REGISTER (TPS6586X_VERSIONCRC + 1)
+
+struct tps6586x_irq_data {
+ u8 mask_reg;
+ u8 mask_mask;
+};
+
+#define TPS6586X_IRQ(_reg, _mask) \
+ { \
+ .mask_reg = (_reg) - TPS6586X_INT_MASK1, \
+ .mask_mask = (_mask), \
+ }
+
+static const struct tps6586x_irq_data tps6586x_irqs[] = {
+ [TPS6586X_INT_PLDO_0] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0),
+ [TPS6586X_INT_PLDO_1] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1),
+ [TPS6586X_INT_PLDO_2] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2),
+ [TPS6586X_INT_PLDO_3] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3),
+ [TPS6586X_INT_PLDO_4] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4),
+ [TPS6586X_INT_PLDO_5] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5),
+ [TPS6586X_INT_PLDO_6] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6),
+ [TPS6586X_INT_PLDO_7] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7),
+ [TPS6586X_INT_COMP_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0),
+ [TPS6586X_INT_ADC] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1),
+ [TPS6586X_INT_PLDO_8] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2),
+ [TPS6586X_INT_PLDO_9] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3),
+ [TPS6586X_INT_PSM_0] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4),
+ [TPS6586X_INT_PSM_1] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5),
+ [TPS6586X_INT_PSM_2] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6),
+ [TPS6586X_INT_PSM_3] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7),
+ [TPS6586X_INT_RTC_ALM1] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4),
+ [TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03),
+ [TPS6586X_INT_USB_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2),
+ [TPS6586X_INT_AC_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3),
+ [TPS6586X_INT_BAT_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0),
+ [TPS6586X_INT_CHG_STAT] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc),
+ [TPS6586X_INT_CHG_TEMP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06),
+ [TPS6586X_INT_PP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0),
+ [TPS6586X_INT_RESUME] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5),
+ [TPS6586X_INT_LOW_SYS] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6),
+ [TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1),
+};
+
+static struct resource tps6586x_rtc_resources[] = {
+ {
+ .start = TPS6586X_INT_RTC_ALM1,
+ .end = TPS6586X_INT_RTC_ALM1,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static const struct mfd_cell tps6586x_cell[] = {
+ {
+ .name = "tps6586x-gpio",
+ },
+ {
+ .name = "tps6586x-regulator",
+ },
+ {
+ .name = "tps6586x-rtc",
+ .num_resources = ARRAY_SIZE(tps6586x_rtc_resources),
+ .resources = &tps6586x_rtc_resources[0],
+ },
+ {
+ .name = "tps6586x-onkey",
+ },
+};
+
+struct tps6586x {
+ struct device *dev;
+ struct i2c_client *client;
+ struct regmap *regmap;
+ int version;
+
+ int irq;
+ struct irq_chip irq_chip;
+ struct mutex irq_lock;
+ int irq_base;
+ u32 irq_en;
+ u8 mask_reg[5];
+ struct irq_domain *irq_domain;
+};
+
+static inline struct tps6586x *dev_to_tps6586x(struct device *dev)
+{
+ return i2c_get_clientdata(to_i2c_client(dev));
+}
+
+int tps6586x_write(struct device *dev, int reg, uint8_t val)
+{
+ struct tps6586x *tps6586x = dev_to_tps6586x(dev);
+
+ return regmap_write(tps6586x->regmap, reg, val);
+}
+EXPORT_SYMBOL_GPL(tps6586x_write);
+
+int tps6586x_writes(struct device *dev, int reg, int len, uint8_t *val)
+{
+ struct tps6586x *tps6586x = dev_to_tps6586x(dev);
+
+ return regmap_bulk_write(tps6586x->regmap, reg, val, len);
+}
+EXPORT_SYMBOL_GPL(tps6586x_writes);
+
+int tps6586x_read(struct device *dev, int reg, uint8_t *val)
+{
+ struct tps6586x *tps6586x = dev_to_tps6586x(dev);
+ unsigned int rval;
+ int ret;
+
+ ret = regmap_read(tps6586x->regmap, reg, &rval);
+ if (!ret)
+ *val = rval;
+ return ret;
+}
+EXPORT_SYMBOL_GPL(tps6586x_read);
+
+int tps6586x_reads(struct device *dev, int reg, int len, uint8_t *val)
+{
+ struct tps6586x *tps6586x = dev_to_tps6586x(dev);
+
+ return regmap_bulk_read(tps6586x->regmap, reg, val, len);
+}
+EXPORT_SYMBOL_GPL(tps6586x_reads);
+
+int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
+{
+ struct tps6586x *tps6586x = dev_to_tps6586x(dev);
+
+ return regmap_update_bits(tps6586x->regmap, reg, bit_mask, bit_mask);
+}
+EXPORT_SYMBOL_GPL(tps6586x_set_bits);
+
+int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
+{
+ struct tps6586x *tps6586x = dev_to_tps6586x(dev);
+
+ return regmap_update_bits(tps6586x->regmap, reg, bit_mask, 0);
+}
+EXPORT_SYMBOL_GPL(tps6586x_clr_bits);
+
+int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
+{
+ struct tps6586x *tps6586x = dev_to_tps6586x(dev);
+
+ return regmap_update_bits(tps6586x->regmap, reg, mask, val);
+}
+EXPORT_SYMBOL_GPL(tps6586x_update);
+
+int tps6586x_irq_get_virq(struct device *dev, int irq)
+{
+ struct tps6586x *tps6586x = dev_to_tps6586x(dev);
+
+ return irq_create_mapping(tps6586x->irq_domain, irq);
+}
+EXPORT_SYMBOL_GPL(tps6586x_irq_get_virq);
+
+int tps6586x_get_version(struct device *dev)
+{
+ struct tps6586x *tps6586x = dev_get_drvdata(dev);
+
+ return tps6586x->version;
+}
+EXPORT_SYMBOL_GPL(tps6586x_get_version);
+
+static int __remove_subdev(struct device *dev, void *unused)
+{
+ platform_device_unregister(to_platform_device(dev));
+ return 0;
+}
+
+static int tps6586x_remove_subdevs(struct tps6586x *tps6586x)
+{
+ return device_for_each_child(tps6586x->dev, NULL, __remove_subdev);
+}
+
+static void tps6586x_irq_lock(struct irq_data *data)
+{
+ struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
+
+ mutex_lock(&tps6586x->irq_lock);
+}
+
+static void tps6586x_irq_enable(struct irq_data *irq_data)
+{
+ struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
+ unsigned int __irq = irq_data->hwirq;
+ const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
+
+ tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
+ tps6586x->irq_en |= (1 << __irq);
+}
+
+static void tps6586x_irq_disable(struct irq_data *irq_data)
+{
+ struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
+
+ unsigned int __irq = irq_data->hwirq;
+ const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
+
+ tps6586x->mask_reg[data->mask_reg] |= data->mask_mask;
+ tps6586x->irq_en &= ~(1 << __irq);
+}
+
+static void tps6586x_irq_sync_unlock(struct irq_data *data)
+{
+ struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
+ int ret;
+ ret = tps6586x_write(tps6586x->dev,
+ TPS6586X_INT_MASK1 + i,
+ tps6586x->mask_reg[i]);
+ WARN_ON(ret);
+ }
+
+ mutex_unlock(&tps6586x->irq_lock);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int tps6586x_irq_set_wake(struct irq_data *irq_data, unsigned int on)
+{
+ struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
+ return irq_set_irq_wake(tps6586x->irq, on);
+}
+#else
+#define tps6586x_irq_set_wake NULL
+#endif
+
+static struct irq_chip tps6586x_irq_chip = {
+ .name = "tps6586x",
+ .irq_bus_lock = tps6586x_irq_lock,
+ .irq_bus_sync_unlock = tps6586x_irq_sync_unlock,
+ .irq_disable = tps6586x_irq_disable,
+ .irq_enable = tps6586x_irq_enable,
+ .irq_set_wake = tps6586x_irq_set_wake,
+};
+
+static int tps6586x_irq_map(struct irq_domain *h, unsigned int virq,
+ irq_hw_number_t hw)
+{
+ struct tps6586x *tps6586x = h->host_data;
+
+ irq_set_chip_data(virq, tps6586x);
+ irq_set_chip_and_handler(virq, &tps6586x_irq_chip, handle_simple_irq);
+ irq_set_nested_thread(virq, 1);
+
+ /* ARM needs us to explicitly flag the IRQ as valid
+ * and will set them noprobe when we do so. */
+#ifdef CONFIG_ARM
+ set_irq_flags(virq, IRQF_VALID);
+#else
+ irq_set_noprobe(virq);
+#endif
+
+ return 0;
+}
+
+static struct irq_domain_ops tps6586x_domain_ops = {
+ .map = tps6586x_irq_map,
+ .xlate = irq_domain_xlate_twocell,
+};
+
+static irqreturn_t tps6586x_irq(int irq, void *data)
+{
+ struct tps6586x *tps6586x = data;
+ u32 acks;
+ int ret = 0;
+
+ ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
+ sizeof(acks), (uint8_t *)&acks);
+
+ if (ret < 0) {
+ dev_err(tps6586x->dev, "failed to read interrupt status\n");
+ return IRQ_NONE;
+ }
+
+ acks = le32_to_cpu(acks);
+
+ while (acks) {
+ int i = __ffs(acks);
+
+ if (tps6586x->irq_en & (1 << i))
+ handle_nested_irq(
+ irq_find_mapping(tps6586x->irq_domain, i));
+
+ acks &= ~(1 << i);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
+ int irq_base)
+{
+ int i, ret;
+ u8 tmp[4];
+ int new_irq_base;
+ int irq_num = ARRAY_SIZE(tps6586x_irqs);
+
+ tps6586x->irq = irq;
+
+ mutex_init(&tps6586x->irq_lock);
+ for (i = 0; i < 5; i++) {
+ tps6586x->mask_reg[i] = 0xff;
+ tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
+ }
+
+ tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);
+
+ if (irq_base > 0) {
+ new_irq_base = irq_alloc_descs(irq_base, 0, irq_num, -1);
+ if (new_irq_base < 0) {
+ dev_err(tps6586x->dev,
+ "Failed to alloc IRQs: %d\n", new_irq_base);
+ return new_irq_base;
+ }
+ } else {
+ new_irq_base = 0;
+ }
+
+ tps6586x->irq_domain = irq_domain_add_simple(tps6586x->dev->of_node,
+ irq_num, new_irq_base, &tps6586x_domain_ops,
+ tps6586x);
+ if (!tps6586x->irq_domain) {
+ dev_err(tps6586x->dev, "Failed to create IRQ domain\n");
+ return -ENOMEM;
+ }
+ ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
+ "tps6586x", tps6586x);
+
+ if (!ret)
+ device_init_wakeup(tps6586x->dev, 1);
+
+ return ret;
+}
+
+static int tps6586x_add_subdevs(struct tps6586x *tps6586x,
+ struct tps6586x_platform_data *pdata)
+{
+ struct tps6586x_subdev_info *subdev;
+ struct platform_device *pdev;
+ int i, ret = 0;
+
+ for (i = 0; i < pdata->num_subdevs; i++) {
+ subdev = &pdata->subdevs[i];
+
+ pdev = platform_device_alloc(subdev->name, subdev->id);
+ if (!pdev) {
+ ret = -ENOMEM;
+ goto failed;
+ }
+
+ pdev->dev.parent = tps6586x->dev;
+ pdev->dev.platform_data = subdev->platform_data;
+ pdev->dev.of_node = subdev->of_node;
+
+ ret = platform_device_add(pdev);
+ if (ret) {
+ platform_device_put(pdev);
+ goto failed;
+ }
+ }
+ return 0;
+
+failed:
+ tps6586x_remove_subdevs(tps6586x);
+ return ret;
+}
+
+#ifdef CONFIG_OF
+static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
+{
+ struct device_node *np = client->dev.of_node;
+ struct tps6586x_platform_data *pdata;
+
+ pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata) {
+ dev_err(&client->dev, "Memory allocation failed\n");
+ return NULL;
+ }
+
+ pdata->num_subdevs = 0;
+ pdata->subdevs = NULL;
+ pdata->gpio_base = -1;
+ pdata->irq_base = -1;
+ pdata->pm_off = of_property_read_bool(np, "ti,system-power-controller");
+
+ return pdata;
+}
+
+static const struct of_device_id tps6586x_of_match[] = {
+ { .compatible = "ti,tps6586x", },
+ { },
+};
+#else
+static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
+{
+ return NULL;
+}
+#endif
+
+static bool is_volatile_reg(struct device *dev, unsigned int reg)
+{
+ /* Cache all interrupt mask register */
+ if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5))
+ return false;
+
+ return true;
+}
+
+static const struct regmap_config tps6586x_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = TPS6586X_MAX_REGISTER - 1,
+ .volatile_reg = is_volatile_reg,
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static struct device *tps6586x_dev;
+static void tps6586x_power_off(void)
+{
+ if (tps6586x_clr_bits(tps6586x_dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT))
+ return;
+
+ tps6586x_set_bits(tps6586x_dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT);
+}
+
+static void tps6586x_print_version(struct i2c_client *client, int version)
+{
+ const char *name;
+
+ switch (version) {
+ case TPS658621A:
+ name = "TPS658621A";
+ break;
+ case TPS658621CD:
+ name = "TPS658621C/D";
+ break;
+ case TPS658623:
+ name = "TPS658623";
+ break;
+ case TPS658640:
+ case TPS658640v2:
+ name = "TPS658640";
+ break;
+ case TPS658643:
+ name = "TPS658643";
+ break;
+ default:
+ name = "TPS6586X";
+ break;
+ }
+
+ dev_info(&client->dev, "Found %s, VERSIONCRC is %02x\n", name, version);
+}
+
+static int tps6586x_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct tps6586x_platform_data *pdata = dev_get_platdata(&client->dev);
+ struct tps6586x *tps6586x;
+ int ret;
+ int version;
+
+ if (!pdata && client->dev.of_node)
+ pdata = tps6586x_parse_dt(client);
+
+ if (!pdata) {
+ dev_err(&client->dev, "tps6586x requires platform data\n");
+ return -ENOTSUPP;
+ }
+
+ version = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
+ if (version < 0) {
+ dev_err(&client->dev, "Chip ID read failed: %d\n", version);
+ return -EIO;
+ }
+
+ tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
+ if (!tps6586x)
+ return -ENOMEM;
+
+ tps6586x->version = version;
+ tps6586x_print_version(client, tps6586x->version);
+
+ tps6586x->client = client;
+ tps6586x->dev = &client->dev;
+ i2c_set_clientdata(client, tps6586x);
+
+ tps6586x->regmap = devm_regmap_init_i2c(client,
+ &tps6586x_regmap_config);
+ if (IS_ERR(tps6586x->regmap)) {
+ ret = PTR_ERR(tps6586x->regmap);
+ dev_err(&client->dev, "regmap init failed: %d\n", ret);
+ return ret;
+ }
+
+
+ if (client->irq) {
+ ret = tps6586x_irq_init(tps6586x, client->irq,
+ pdata->irq_base);
+ if (ret) {
+ dev_err(&client->dev, "IRQ init failed: %d\n", ret);
+ return ret;
+ }
+ }
+
+ ret = mfd_add_devices(tps6586x->dev, -1,
+ tps6586x_cell, ARRAY_SIZE(tps6586x_cell),
+ NULL, 0, tps6586x->irq_domain);
+ if (ret < 0) {
+ dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
+ goto err_mfd_add;
+ }
+
+ ret = tps6586x_add_subdevs(tps6586x, pdata);
+ if (ret) {
+ dev_err(&client->dev, "add devices failed: %d\n", ret);
+ goto err_add_devs;
+ }
+
+ if (pdata->pm_off && !pm_power_off) {
+ tps6586x_dev = &client->dev;
+ pm_power_off = tps6586x_power_off;
+ }
+
+ return 0;
+
+err_add_devs:
+ mfd_remove_devices(tps6586x->dev);
+err_mfd_add:
+ if (client->irq)
+ free_irq(client->irq, tps6586x);
+ return ret;
+}
+
+static int tps6586x_i2c_remove(struct i2c_client *client)
+{
+ struct tps6586x *tps6586x = i2c_get_clientdata(client);
+
+ tps6586x_remove_subdevs(tps6586x);
+ mfd_remove_devices(tps6586x->dev);
+ if (client->irq)
+ free_irq(client->irq, tps6586x);
+ return 0;
+}
+
+static const struct i2c_device_id tps6586x_id_table[] = {
+ { "tps6586x", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);
+
+static struct i2c_driver tps6586x_driver = {
+ .driver = {
+ .name = "tps6586x",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(tps6586x_of_match),
+ },
+ .probe = tps6586x_i2c_probe,
+ .remove = tps6586x_i2c_remove,
+ .id_table = tps6586x_id_table,
+};
+
+static int __init tps6586x_init(void)
+{
+ return i2c_add_driver(&tps6586x_driver);
+}
+subsys_initcall(tps6586x_init);
+
+static void __exit tps6586x_exit(void)
+{
+ i2c_del_driver(&tps6586x_driver);
+}
+module_exit(tps6586x_exit);
+
+MODULE_DESCRIPTION("TPS6586X core driver");
+MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff