Added missing tegra files.HEADmaster

1 files changed, 376 insertions, 0 deletions

diff --git a/drivers/mfd/max8907c.c b/drivers/mfd/max8907c.c
new file mode 100644
index 00000000000..d03dbced21e
--- /dev/null
+++ b/drivers/mfd/max8907c.c
@@ -0,0 +1,376 @@
+/*
+ * max8907c.c - mfd driver for MAX8907c
+ *
+ * Copyright (C) 2010 Gyungoh Yoo <jack.yoo@maxim-ic.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/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/max8907c.h>
+
+static struct mfd_cell cells[] = {
+        {.name = "max8907-regulator",},
+        {.name = "max8907c-rtc",},
+};
+
+static int max8907c_i2c_read(struct i2c_client *i2c, u8 reg, u8 count, u8 *dest)
+{
+        struct i2c_msg xfer[2];
+        int ret = 0;
+
+        xfer[0].addr = i2c->addr;
+        xfer[0].flags = I2C_M_NOSTART;
+        xfer[0].len = 1;
+        xfer[0].buf = &reg;
+
+        xfer[1].addr = i2c->addr;
+        xfer[1].flags = I2C_M_RD;
+        xfer[1].len = count;
+        xfer[1].buf = dest;
+
+        ret = i2c_transfer(i2c->adapter, xfer, 2);
+        if (ret < 0)
+                return ret;
+        if (ret != 2)
+                return -EIO;
+
+        return 0;
+}
+
+static int max8907c_i2c_write(struct i2c_client *i2c, u8 reg, u8 count, const u8 *src)
+{
+        u8 msg[0x100 + 1];
+        int ret = 0;
+
+        msg[0] = reg;
+        memcpy(&msg[1], src, count);
+
+        ret = i2c_master_send(i2c, msg, count + 1);
+        if (ret < 0)
+                return ret;
+        if (ret != count + 1)
+                return -EIO;
+
+        return 0;
+}
+
+int max8907c_reg_read(struct i2c_client *i2c, u8 reg)
+{
+        int ret;
+        u8 val;
+
+        ret = max8907c_i2c_read(i2c, reg, 1, &val);
+
+        pr_debug("max8907c: reg read  reg=%x, val=%x\n",
+                 (unsigned int)reg, (unsigned int)val);
+
+        if (ret != 0)
+                pr_err("Failed to read max8907c I2C driver: %d\n", ret);
+        return val;
+}
+EXPORT_SYMBOL_GPL(max8907c_reg_read);
+
+int max8907c_reg_bulk_read(struct i2c_client *i2c, u8 reg, u8 count, u8 *val)
+{
+        int ret;
+
+        ret = max8907c_i2c_read(i2c, reg, count, val);
+
+        pr_debug("max8907c: reg read  reg=%x, val=%x\n",
+                 (unsigned int)reg, (unsigned int)*val);
+
+        if (ret != 0)
+                pr_err("Failed to read max8907c I2C driver: %d\n", ret);
+        return ret;
+}
+EXPORT_SYMBOL_GPL(max8907c_reg_bulk_read);
+
+int max8907c_reg_write(struct i2c_client *i2c, u8 reg, u8 val)
+{
+        struct max8907c *max8907c = i2c_get_clientdata(i2c);
+        int ret;
+
+        pr_debug("max8907c: reg write  reg=%x, val=%x\n",
+                 (unsigned int)reg, (unsigned int)val);
+
+        mutex_lock(&max8907c->io_lock);
+        ret = max8907c_i2c_write(i2c, reg, 1, &val);
+        mutex_unlock(&max8907c->io_lock);
+
+        if (ret != 0)
+                pr_err("Failed to write max8907c I2C driver: %d\n", ret);
+        return ret;
+}
+EXPORT_SYMBOL_GPL(max8907c_reg_write);
+
+int max8907c_reg_bulk_write(struct i2c_client *i2c, u8 reg, u8 count, u8 *val)
+{
+        struct max8907c *max8907c = i2c_get_clientdata(i2c);
+        int ret;
+
+        pr_debug("max8907c: reg write  reg=%x, val=%x\n",
+                 (unsigned int)reg, (unsigned int)*val);
+
+        mutex_lock(&max8907c->io_lock);
+        ret = max8907c_i2c_write(i2c, reg, count, val);
+        mutex_unlock(&max8907c->io_lock);
+
+        if (ret != 0)
+                pr_err("Failed to write max8907c I2C driver: %d\n", ret);
+        return ret;
+}
+EXPORT_SYMBOL_GPL(max8907c_reg_bulk_write);
+
+int max8907c_set_bits(struct i2c_client *i2c, u8 reg, u8 mask, u8 val)
+{
+        struct max8907c *max8907c = i2c_get_clientdata(i2c);
+        u8 tmp;
+        int ret;
+
+        pr_debug("max8907c: reg write  reg=%02X, val=%02X, mask=%02X\n",
+                 (unsigned int)reg, (unsigned int)val, (unsigned int)mask);
+
+        mutex_lock(&max8907c->io_lock);
+        ret = max8907c_i2c_read(i2c, reg, 1, &tmp);
+        if (ret == 0) {
+                val = (tmp & ~mask) | (val & mask);
+                ret = max8907c_i2c_write(i2c, reg, 1, &val);
+        }
+        mutex_unlock(&max8907c->io_lock);
+
+        if (ret != 0)
+                pr_err("Failed to write max8907c I2C driver: %d\n", ret);
+        return ret;
+}
+EXPORT_SYMBOL_GPL(max8907c_set_bits);
+
+static struct i2c_client *max8907c_client = NULL;
+static void max8907c_power_off(void)
+{
+        if (!max8907c_client)
+                return;
+
+        max8907c_set_bits(max8907c_client, MAX8907C_REG_RESET_CNFG,
+                                                MAX8907C_MASK_POWER_OFF, 0x40);
+}
+
+void max8907c_deep_sleep(int enter)
+{
+        if (!max8907c_client)
+                return;
+
+        if (enter) {
+                max8907c_reg_write(max8907c_client, MAX8907C_REG_SDSEQCNT1,
+                                                MAX8907C_POWER_UP_DELAY_CNT12);
+                max8907c_reg_write(max8907c_client, MAX8907C_REG_SDSEQCNT2,
+                                                        MAX8907C_DELAY_CNT0);
+                max8907c_reg_write(max8907c_client, MAX8907C_REG_SDCTL2,
+                                                        MAX8907C_SD_SEQ2);
+        } else {
+                max8907c_reg_write(max8907c_client, MAX8907C_REG_SDSEQCNT1,
+                                                        MAX8907C_DELAY_CNT0);
+                max8907c_reg_write(max8907c_client, MAX8907C_REG_SDCTL2,
+                                                        MAX8907C_SD_SEQ1);
+                max8907c_reg_write(max8907c_client, MAX8907C_REG_SDSEQCNT2,
+                                MAX8907C_POWER_UP_DELAY_CNT1 | MAX8907C_POWER_DOWN_DELAY_CNT12);
+        }
+}
+
+static int max8907c_remove_subdev(struct device *dev, void *unused)
+{
+        platform_device_unregister(to_platform_device(dev));
+        return 0;
+}
+
+static int max8907c_remove_subdevs(struct max8907c *max8907c)
+{
+        return device_for_each_child(max8907c->dev, NULL,
+                                     max8907c_remove_subdev);
+}
+
+static int max8097c_add_subdevs(struct max8907c *max8907c,
+                                struct max8907c_platform_data *pdata)
+{
+        struct platform_device *pdev;
+        int ret;
+        int i;
+
+        for (i = 0; i < pdata->num_subdevs; i++) {
+                pdev = platform_device_alloc(pdata->subdevs[i]->name,
+                                             pdata->subdevs[i]->id);
+
+                pdev->dev.parent = max8907c->dev;
+                pdev->dev.platform_data = pdata->subdevs[i]->dev.platform_data;
+
+                ret = platform_device_add(pdev);
+                if (ret)
+                        goto error;
+        }
+        return 0;
+
+error:
+        max8907c_remove_subdevs(max8907c);
+        return ret;
+}
+
+int max8907c_pwr_en_config(void)
+{
+        int ret;
+        u8 data;
+
+        if (!max8907c_client)
+                return -EINVAL;
+
+        /*
+         * Enable/disable PWREN h/w control mechanism (PWREN signal must be
+         * inactive = high at this time)
+         */
+        ret = max8907c_set_bits(max8907c_client, MAX8907C_REG_RESET_CNFG,
+                                        MAX8907C_MASK_PWR_EN, MAX8907C_PWR_EN);
+        if (ret != 0)
+                return ret;
+
+        /*
+         * When enabled, connect PWREN to SEQ2 by clearing SEQ2 configuration
+         * settings for silicon revision that requires s/w WAR. On other
+         * MAX8907B revisions PWREN is always connected to SEQ2.
+         */
+        data = max8907c_reg_read(max8907c_client, MAX8907C_REG_II2RR);
+
+        if (data == MAX8907B_II2RR_PWREN_WAR) {
+                data = 0x00;
+                ret = max8907c_reg_write(max8907c_client, MAX8907C_REG_SEQ2CNFG, data);
+        }
+        return ret;
+}
+
+int max8907c_pwr_en_attach(void)
+{
+        int ret;
+
+        if (!max8907c_client)
+                return -EINVAL;
+
+        /* No sequencer delay for CPU rail when it is attached */
+        ret = max8907c_reg_write(max8907c_client, MAX8907C_REG_SDSEQCNT1,
+                                                        MAX8907C_DELAY_CNT0);
+        if (ret != 0)
+                return ret;
+
+        return max8907c_set_bits(max8907c_client, MAX8907C_REG_SDCTL1,
+                                        MAX8907C_MASK_CTL_SEQ, MAX8907C_CTL_SEQ);
+}
+
+static int max8907c_i2c_probe(struct i2c_client *i2c,
+                              const struct i2c_device_id *id)
+{
+        struct max8907c *max8907c;
+        struct max8907c_platform_data *pdata = i2c->dev.platform_data;
+        int ret;
+        int i;
+
+        max8907c = kzalloc(sizeof(struct max8907c), GFP_KERNEL);
+        if (max8907c == NULL)
+                return -ENOMEM;
+
+        max8907c->dev = &i2c->dev;
+        dev_set_drvdata(max8907c->dev, max8907c);
+
+        max8907c->i2c_power = i2c;
+        i2c_set_clientdata(i2c, max8907c);
+
+        max8907c->i2c_rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
+        i2c_set_clientdata(max8907c->i2c_rtc, max8907c);
+
+        mutex_init(&max8907c->io_lock);
+
+        for (i = 0; i < ARRAY_SIZE(cells); i++) {
+                cells[i].platform_data = max8907c;
+                cells[i].pdata_size = sizeof(*max8907c);
+        }
+        ret = mfd_add_devices(max8907c->dev, -1, cells, ARRAY_SIZE(cells),
+                              NULL, 0);
+        if (ret != 0) {
+                i2c_unregister_device(max8907c->i2c_rtc);
+                kfree(max8907c);
+                pr_debug("max8907c: failed to add MFD devices   %X\n", ret);
+                return ret;
+        }
+
+        max8907c_client = i2c;
+
+        max8907c_irq_init(max8907c, i2c->irq, pdata->irq_base);
+
+        ret = max8097c_add_subdevs(max8907c, pdata);
+
+        if (pdata->use_power_off && !pm_power_off)
+                pm_power_off = max8907c_power_off;
+
+        if (pdata->max8907c_setup)
+                return pdata->max8907c_setup();
+
+        return ret;
+}
+
+static int max8907c_i2c_remove(struct i2c_client *i2c)
+{
+        struct max8907c *max8907c = i2c_get_clientdata(i2c);
+
+        max8907c_remove_subdevs(max8907c);
+        i2c_unregister_device(max8907c->i2c_rtc);
+        mfd_remove_devices(max8907c->dev);
+        max8907c_irq_free(max8907c);
+        kfree(max8907c);
+
+        return 0;
+}
+
+static const struct i2c_device_id max8907c_i2c_id[] = {
+        {"max8907c", 0},
+        {}
+};
+
+MODULE_DEVICE_TABLE(i2c, max8907c_i2c_id);
+
+static struct i2c_driver max8907c_i2c_driver = {
+        .driver = {
+                   .name = "max8907c",
+                   .owner = THIS_MODULE,
+                   },
+        .probe = max8907c_i2c_probe,
+        .remove = max8907c_i2c_remove,
+        .suspend = max8907c_suspend,
+        .resume = max8907c_resume,
+        .id_table = max8907c_i2c_id,
+};
+
+static int __init max8907c_i2c_init(void)
+{
+        int ret = -ENODEV;
+
+        ret = i2c_add_driver(&max8907c_i2c_driver);
+        if (ret != 0)
+                pr_err("Failed to register I2C driver: %d\n", ret);
+
+        return ret;
+}
+
+subsys_initcall(max8907c_i2c_init);
+
+static void __exit max8907c_i2c_exit(void)
+{
+        i2c_del_driver(&max8907c_i2c_driver);
+}
+
+module_exit(max8907c_i2c_exit);
+
+MODULE_DESCRIPTION("MAX8907C multi-function core driver");
+MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@maxim-ic.com>");
+MODULE_LICENSE("GPL");