--- /dev/null
+/* NXP PCF50633 Power Management Unit (PMU) driver
+ *
+ * (C) 2006-2008 by Openmoko, Inc.
+ * Author: Harald Welte <laforge@openmoko.org>
+ * Balaji Rao <balajirrao@openmoko.org>
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/sysfs.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/pm.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+#include <linux/err.h>
+
+#include <linux/mfd/pcf50633/core.h>
+
+/* Read a block of up to 32 regs */
+int pcf50633_read_block(struct pcf50633 *pcf, u8 reg,
+ int nr_regs, u8 *data)
+{
+ int ret;
+
+ ret = regmap_raw_read(pcf->regmap, reg, data, nr_regs);
+ if (ret != 0)
+ return ret;
+
+ return nr_regs;
+}
+EXPORT_SYMBOL_GPL(pcf50633_read_block);
+
+/* Write a block of up to 32 regs */
+int pcf50633_write_block(struct pcf50633 *pcf , u8 reg,
+ int nr_regs, u8 *data)
+{
+ return regmap_raw_write(pcf->regmap, reg, data, nr_regs);
+}
+EXPORT_SYMBOL_GPL(pcf50633_write_block);
+
+u8 pcf50633_reg_read(struct pcf50633 *pcf, u8 reg)
+{
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(pcf->regmap, reg, &val);
+ if (ret < 0)
+ return -1;
+
+ return val;
+}
+EXPORT_SYMBOL_GPL(pcf50633_reg_read);
+
+int pcf50633_reg_write(struct pcf50633 *pcf, u8 reg, u8 val)
+{
+ return regmap_write(pcf->regmap, reg, val);
+}
+EXPORT_SYMBOL_GPL(pcf50633_reg_write);
+
+int pcf50633_reg_set_bit_mask(struct pcf50633 *pcf, u8 reg, u8 mask, u8 val)
+{
+ return regmap_update_bits(pcf->regmap, reg, mask, val);
+}
+EXPORT_SYMBOL_GPL(pcf50633_reg_set_bit_mask);
+
+int pcf50633_reg_clear_bits(struct pcf50633 *pcf, u8 reg, u8 val)
+{
+ return regmap_update_bits(pcf->regmap, reg, val, 0);
+}
+EXPORT_SYMBOL_GPL(pcf50633_reg_clear_bits);
+
+/* sysfs attributes */
+static ssize_t show_dump_regs(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct pcf50633 *pcf = dev_get_drvdata(dev);
+ u8 dump[16];
+ int n, n1, idx = 0;
+ char *buf1 = buf;
+ static u8 address_no_read[] = { /* must be ascending */
+ PCF50633_REG_INT1,
+ PCF50633_REG_INT2,
+ PCF50633_REG_INT3,
+ PCF50633_REG_INT4,
+ PCF50633_REG_INT5,
+ 0 /* terminator */
+ };
+
+ for (n = 0; n < 256; n += sizeof(dump)) {
+ for (n1 = 0; n1 < sizeof(dump); n1++)
+ if (n == address_no_read[idx]) {
+ idx++;
+ dump[n1] = 0x00;
+ } else
+ dump[n1] = pcf50633_reg_read(pcf, n + n1);
+
+ buf1 += sprintf(buf1, "%*ph\n", (int)sizeof(dump), dump);
+ }
+
+ return buf1 - buf;
+}
+static DEVICE_ATTR(dump_regs, 0400, show_dump_regs, NULL);
+
+static ssize_t show_resume_reason(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct pcf50633 *pcf = dev_get_drvdata(dev);
+ int n;
+
+ n = sprintf(buf, "%02x%02x%02x%02x%02x\n",
+ pcf->resume_reason[0],
+ pcf->resume_reason[1],
+ pcf->resume_reason[2],
+ pcf->resume_reason[3],
+ pcf->resume_reason[4]);
+
+ return n;
+}
+static DEVICE_ATTR(resume_reason, 0400, show_resume_reason, NULL);
+
+static struct attribute *pcf_sysfs_entries[] = {
+ &dev_attr_dump_regs.attr,
+ &dev_attr_resume_reason.attr,
+ NULL,
+};
+
+static struct attribute_group pcf_attr_group = {
+ .name = NULL, /* put in device directory */
+ .attrs = pcf_sysfs_entries,
+};
+
+static void
+pcf50633_client_dev_register(struct pcf50633 *pcf, const char *name,
+ struct platform_device **pdev)
+{
+ int ret;
+
+ *pdev = platform_device_alloc(name, -1);
+ if (!*pdev) {
+ dev_err(pcf->dev, "Falied to allocate %s\n", name);
+ return;
+ }
+
+ (*pdev)->dev.parent = pcf->dev;
+
+ ret = platform_device_add(*pdev);
+ if (ret) {
+ dev_err(pcf->dev, "Failed to register %s: %d\n", name, ret);
+ platform_device_put(*pdev);
+ *pdev = NULL;
+ }
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int pcf50633_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct pcf50633 *pcf = i2c_get_clientdata(client);
+
+ return pcf50633_irq_suspend(pcf);
+}
+
+static int pcf50633_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct pcf50633 *pcf = i2c_get_clientdata(client);
+
+ return pcf50633_irq_resume(pcf);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(pcf50633_pm, pcf50633_suspend, pcf50633_resume);
+
+static const struct regmap_config pcf50633_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static int pcf50633_probe(struct i2c_client *client,
+ const struct i2c_device_id *ids)
+{
+ struct pcf50633 *pcf;
+ struct platform_device *pdev;
+ struct pcf50633_platform_data *pdata = dev_get_platdata(&client->dev);
+ int i, j, ret;
+ int version, variant;
+
+ if (!client->irq) {
+ dev_err(&client->dev, "Missing IRQ\n");
+ return -ENOENT;
+ }
+
+ pcf = devm_kzalloc(&client->dev, sizeof(*pcf), GFP_KERNEL);
+ if (!pcf)
+ return -ENOMEM;
+
+ i2c_set_clientdata(client, pcf);
+ pcf->dev = &client->dev;
+ pcf->pdata = pdata;
+
+ mutex_init(&pcf->lock);
+
+ pcf->regmap = devm_regmap_init_i2c(client, &pcf50633_regmap_config);
+ if (IS_ERR(pcf->regmap)) {
+ ret = PTR_ERR(pcf->regmap);
+ dev_err(pcf->dev, "Failed to allocate register map: %d\n", ret);
+ return ret;
+ }
+
+ version = pcf50633_reg_read(pcf, 0);
+ variant = pcf50633_reg_read(pcf, 1);
+ if (version < 0 || variant < 0) {
+ dev_err(pcf->dev, "Unable to probe pcf50633\n");
+ ret = -ENODEV;
+ return ret;
+ }
+
+ dev_info(pcf->dev, "Probed device version %d variant %d\n",
+ version, variant);
+
+ pcf50633_irq_init(pcf, client->irq);
+
+ /* Create sub devices */
+ pcf50633_client_dev_register(pcf, "pcf50633-input", &pcf->input_pdev);
+ pcf50633_client_dev_register(pcf, "pcf50633-rtc", &pcf->rtc_pdev);
+ pcf50633_client_dev_register(pcf, "pcf50633-mbc", &pcf->mbc_pdev);
+ pcf50633_client_dev_register(pcf, "pcf50633-adc", &pcf->adc_pdev);
+ pcf50633_client_dev_register(pcf, "pcf50633-backlight", &pcf->bl_pdev);
+
+
+ for (i = 0; i < PCF50633_NUM_REGULATORS; i++) {
+ pdev = platform_device_alloc("pcf50633-regulator", i);
+ if (!pdev)
+ return -ENOMEM;
+
+ pdev->dev.parent = pcf->dev;
+ ret = platform_device_add_data(pdev, &pdata->reg_init_data[i],
+ sizeof(pdata->reg_init_data[i]));
+ if (ret)
+ goto err;
+
+ ret = platform_device_add(pdev);
+ if (ret)
+ goto err;
+
+ pcf->regulator_pdev[i] = pdev;
+ }
+
+ ret = sysfs_create_group(&client->dev.kobj, &pcf_attr_group);
+ if (ret)
+ dev_warn(pcf->dev, "error creating sysfs entries\n");
+
+ if (pdata->probe_done)
+ pdata->probe_done(pcf);
+
+ return 0;
+
+err:
+ platform_device_put(pdev);
+ for (j = 0; j < i; j++)
+ platform_device_put(pcf->regulator_pdev[j]);
+
+ return ret;
+}
+
+static int pcf50633_remove(struct i2c_client *client)
+{
+ struct pcf50633 *pcf = i2c_get_clientdata(client);
+ int i;
+
+ sysfs_remove_group(&client->dev.kobj, &pcf_attr_group);
+ pcf50633_irq_free(pcf);
+
+ platform_device_unregister(pcf->input_pdev);
+ platform_device_unregister(pcf->rtc_pdev);
+ platform_device_unregister(pcf->mbc_pdev);
+ platform_device_unregister(pcf->adc_pdev);
+ platform_device_unregister(pcf->bl_pdev);
+
+ for (i = 0; i < PCF50633_NUM_REGULATORS; i++)
+ platform_device_unregister(pcf->regulator_pdev[i]);
+
+ return 0;
+}
+
+static const struct i2c_device_id pcf50633_id_table[] = {
+ {"pcf50633", 0x73},
+ {/* end of list */}
+};
+MODULE_DEVICE_TABLE(i2c, pcf50633_id_table);
+
+static struct i2c_driver pcf50633_driver = {
+ .driver = {
+ .name = "pcf50633",
+ .pm = &pcf50633_pm,
+ },
+ .id_table = pcf50633_id_table,
+ .probe = pcf50633_probe,
+ .remove = pcf50633_remove,
+};
+
+static int __init pcf50633_init(void)
+{
+ return i2c_add_driver(&pcf50633_driver);
+}
+
+static void __exit pcf50633_exit(void)
+{
+ i2c_del_driver(&pcf50633_driver);
+}
+
+MODULE_DESCRIPTION("I2C chip driver for NXP PCF50633 PMU");
+MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
+MODULE_LICENSE("GPL");
+
+subsys_initcall(pcf50633_init);
+module_exit(pcf50633_exit);
Code Review / kvmfornfv.git / blobdiff