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authorLinus Torvalds <torvalds@linux-foundation.org>2012-07-30 12:41:17 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-30 12:41:17 -0700
commit3e701cdfe601306817604ca7f79f1d1c1088007c (patch)
tree1b0a4088a091f035d8be06758a604ca449223fc0 /drivers/mfd/88pm80x.c
parent7d3d09b01a028e9dd1282149fdcd2a6e0edd73e4 (diff)
parent3c1534c7ecffeb4330bba4c55d17f301528195b6 (diff)
Merge tag 'mfd-3.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6
Pull MFD bits from Samuel Ortiz: "We have support for a few new drivers: - Samsung s2mps11 - Wolfson Microelectronics wm5102 and wm5110 - Marvell 88PM800 and 88PM805 - TI twl6041 We also have our regular driver improvements: - Device tree and IRQ domain support for STE AB8500 - Regmap and devm_* API conversion for TI tps6586x - Device tree support for Samsung max77686 - devm_* API conversion for STE AB3100 Besides that, quite a lot of fixing and cleanup for mc13xxx, tps65910, tps65090, da9052 and twl-core." Fix up mostly trivial conflicts, with the exception of drivers/usb/host/ehci-omap.c in particular, which had some re-organization of the reset sequence (commit 1a49e2ac9651: "EHCI: centralize controller initialization") that clashed with commit 2761a6394516 ("mfd: USB: Fix the omap-usb EHCI ULPI PHY reset fix issues"). In particular, commit 2761a6394516 moved the usb_add_hcd() to the *middle* of the reset sequence, which clashes fairly badly with the reset sequence re-organization (although it could have been done inside the new omap_ehci_init() function). I left that part of commit 2761a6394516 just undone. * tag 'mfd-3.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (110 commits) mfd: Ensure AB8500 platform data is passed through db8500-prcmu to MFD Core mfd: Arizone core should select MFD_CORE mfd: Fix arizona-irq.c build by selecting REGMAP_IRQ mfd: Add debug trace on entering and leaving arizone runtime suspend mfd: Correct tps65090 cell names mfd: Remove gpio support from tps6586x core driver ARM: tegra: defconfig: Enable tps6586x gpio gpio: tps6586x: Add gpio support through platform driver mfd: Cache tps6586x register through regmap mfd: Use regmap for tps6586x register access. mfd: Use devm managed resources for tps6586x input: Add onkey support for 88PM80X PMIC mfd: Add support for twl6041 mfd: Fix twl6040 revision information mfd: Matches should be NULL when populate anatop child devices input: ab8500-ponkey: Create AB8500 domain IRQ mapping mfd: Add missing out of memory check for pcf50633 Documentation: Describe the AB8500 Device Tree bindings mfd: Add tps65910 32-kHz-crystal-input init mfd: Drop modifying mc13xxx driver's id_table in probe ...
Diffstat (limited to 'drivers/mfd/88pm80x.c')
-rw-r--r--drivers/mfd/88pm80x.c145
1 files changed, 145 insertions, 0 deletions
diff --git a/drivers/mfd/88pm80x.c b/drivers/mfd/88pm80x.c
new file mode 100644
index 00000000000..cd0bf527d76
--- /dev/null
+++ b/drivers/mfd/88pm80x.c
@@ -0,0 +1,145 @@
+/*
+ * I2C driver for Marvell 88PM80x
+ *
+ * Copyright (C) 2012 Marvell International Ltd.
+ * Haojian Zhuang <haojian.zhuang@marvell.com>
+ * Joseph(Yossi) Hanin <yhanin@marvell.com>
+ * Qiao Zhou <zhouqiao@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/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/mfd/88pm80x.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+#include <linux/err.h>
+
+/*
+ * workaround: some registers needed by pm805 are defined in pm800, so
+ * need to use this global variable to maintain the relation between
+ * pm800 and pm805. would remove it after HW chip fixes the issue.
+ */
+static struct pm80x_chip *g_pm80x_chip;
+
+const struct regmap_config pm80x_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+EXPORT_SYMBOL_GPL(pm80x_regmap_config);
+
+int __devinit pm80x_init(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct pm80x_chip *chip;
+ struct regmap *map;
+ int ret = 0;
+
+ chip =
+ devm_kzalloc(&client->dev, sizeof(struct pm80x_chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ map = devm_regmap_init_i2c(client, &pm80x_regmap_config);
+ if (IS_ERR(map)) {
+ ret = PTR_ERR(map);
+ dev_err(&client->dev, "Failed to allocate register map: %d\n",
+ ret);
+ goto err_regmap_init;
+ }
+
+ chip->id = id->driver_data;
+ if (chip->id < CHIP_PM800 || chip->id > CHIP_PM805) {
+ ret = -EINVAL;
+ goto err_chip_id;
+ }
+
+ chip->client = client;
+ chip->regmap = map;
+
+ chip->irq = client->irq;
+
+ chip->dev = &client->dev;
+ dev_set_drvdata(chip->dev, chip);
+ i2c_set_clientdata(chip->client, chip);
+
+ device_init_wakeup(&client->dev, 1);
+
+ /*
+ * workaround: set g_pm80x_chip to the first probed chip. if the
+ * second chip is probed, just point to the companion to each
+ * other so that pm805 can access those specific register. would
+ * remove it after HW chip fixes the issue.
+ */
+ if (!g_pm80x_chip)
+ g_pm80x_chip = chip;
+ else {
+ chip->companion = g_pm80x_chip->client;
+ g_pm80x_chip->companion = chip->client;
+ }
+
+ return 0;
+
+err_chip_id:
+ regmap_exit(map);
+err_regmap_init:
+ devm_kfree(&client->dev, chip);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(pm80x_init);
+
+int pm80x_deinit(struct i2c_client *client)
+{
+ struct pm80x_chip *chip = i2c_get_clientdata(client);
+
+ /*
+ * workaround: clear the dependency between pm800 and pm805.
+ * would remove it after HW chip fixes the issue.
+ */
+ if (g_pm80x_chip->companion)
+ g_pm80x_chip->companion = NULL;
+ else
+ g_pm80x_chip = NULL;
+
+ regmap_exit(chip->regmap);
+ devm_kfree(&client->dev, chip);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(pm80x_deinit);
+
+#ifdef CONFIG_PM_SLEEP
+static int pm80x_suspend(struct device *dev)
+{
+ struct i2c_client *client = container_of(dev, struct i2c_client, dev);
+ struct pm80x_chip *chip = i2c_get_clientdata(client);
+
+ if (chip && chip->wu_flag)
+ if (device_may_wakeup(chip->dev))
+ enable_irq_wake(chip->irq);
+
+ return 0;
+}
+
+static int pm80x_resume(struct device *dev)
+{
+ struct i2c_client *client = container_of(dev, struct i2c_client, dev);
+ struct pm80x_chip *chip = i2c_get_clientdata(client);
+
+ if (chip && chip->wu_flag)
+ if (device_may_wakeup(chip->dev))
+ disable_irq_wake(chip->irq);
+
+ return 0;
+}
+#endif
+
+SIMPLE_DEV_PM_OPS(pm80x_pm_ops, pm80x_suspend, pm80x_resume);
+EXPORT_SYMBOL_GPL(pm80x_pm_ops);
+
+MODULE_DESCRIPTION("I2C Driver for Marvell 88PM80x");
+MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
+MODULE_LICENSE("GPL");