Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / mfd / stmpe-i2c.c

diff --git a/kernel/drivers/mfd/stmpe-i2c.c b/kernel/drivers/mfd/stmpe-i2c.c
new file mode 100644 (file)
index 0000000..5c05403
--- /dev/null
+++ b/kernel/drivers/mfd/stmpe-i2c.c
@@ -0,0 +1,140 @@
+/*
+ * ST Microelectronics MFD: stmpe's i2c client specific driver
+ *
+ * Copyright (C) ST-Ericsson SA 2010
+ * Copyright (C) ST Microelectronics SA 2011
+ *
+ * License Terms: GNU General Public License, version 2
+ * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
+ * Author: Viresh Kumar <viresh.linux@gmail.com> for ST Microelectronics
+ */
+
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/of_device.h>
+#include "stmpe.h"
+
+static int i2c_reg_read(struct stmpe *stmpe, u8 reg)
+{
+       struct i2c_client *i2c = stmpe->client;
+
+       return i2c_smbus_read_byte_data(i2c, reg);
+}
+
+static int i2c_reg_write(struct stmpe *stmpe, u8 reg, u8 val)
+{
+       struct i2c_client *i2c = stmpe->client;
+
+       return i2c_smbus_write_byte_data(i2c, reg, val);
+}
+
+static int i2c_block_read(struct stmpe *stmpe, u8 reg, u8 length, u8 *values)
+{
+       struct i2c_client *i2c = stmpe->client;
+
+       return i2c_smbus_read_i2c_block_data(i2c, reg, length, values);
+}
+
+static int i2c_block_write(struct stmpe *stmpe, u8 reg, u8 length,
+               const u8 *values)
+{
+       struct i2c_client *i2c = stmpe->client;
+
+       return i2c_smbus_write_i2c_block_data(i2c, reg, length, values);
+}
+
+static struct stmpe_client_info i2c_ci = {
+       .read_byte = i2c_reg_read,
+       .write_byte = i2c_reg_write,
+       .read_block = i2c_block_read,
+       .write_block = i2c_block_write,
+};
+
+static const struct of_device_id stmpe_of_match[] = {
+       { .compatible = "st,stmpe610", .data = (void *)STMPE610, },
+       { .compatible = "st,stmpe801", .data = (void *)STMPE801, },
+       { .compatible = "st,stmpe811", .data = (void *)STMPE811, },
+       { .compatible = "st,stmpe1601", .data = (void *)STMPE1601, },
+       { .compatible = "st,stmpe1801", .data = (void *)STMPE1801, },
+       { .compatible = "st,stmpe2401", .data = (void *)STMPE2401, },
+       { .compatible = "st,stmpe2403", .data = (void *)STMPE2403, },
+       {},
+};
+MODULE_DEVICE_TABLE(of, stmpe_of_match);
+
+static int
+stmpe_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
+{
+       enum stmpe_partnum partnum;
+       const struct of_device_id *of_id;
+
+       i2c_ci.data = (void *)id;
+       i2c_ci.irq = i2c->irq;
+       i2c_ci.client = i2c;
+       i2c_ci.dev = &i2c->dev;
+
+       of_id = of_match_device(stmpe_of_match, &i2c->dev);
+       if (!of_id) {
+               /*
+                * This happens when the I2C ID matches the node name
+                * but no real compatible string has been given.
+                */
+               dev_info(&i2c->dev, "matching on node name, compatible is preferred\n");
+               partnum = id->driver_data;
+       } else
+               partnum = (enum stmpe_partnum)of_id->data;
+
+       return stmpe_probe(&i2c_ci, partnum);
+}
+
+static int stmpe_i2c_remove(struct i2c_client *i2c)
+{
+       struct stmpe *stmpe = dev_get_drvdata(&i2c->dev);
+
+       return stmpe_remove(stmpe);
+}
+
+static const struct i2c_device_id stmpe_i2c_id[] = {
+       { "stmpe610", STMPE610 },
+       { "stmpe801", STMPE801 },
+       { "stmpe811", STMPE811 },
+       { "stmpe1601", STMPE1601 },
+       { "stmpe1801", STMPE1801 },
+       { "stmpe2401", STMPE2401 },
+       { "stmpe2403", STMPE2403 },
+       { }
+};
+MODULE_DEVICE_TABLE(i2c, stmpe_id);
+
+static struct i2c_driver stmpe_i2c_driver = {
+       .driver = {
+               .name = "stmpe-i2c",
+               .owner = THIS_MODULE,
+#ifdef CONFIG_PM
+               .pm = &stmpe_dev_pm_ops,
+#endif
+               .of_match_table = stmpe_of_match,
+       },
+       .probe          = stmpe_i2c_probe,
+       .remove         = stmpe_i2c_remove,
+       .id_table       = stmpe_i2c_id,
+};
+
+static int __init stmpe_init(void)
+{
+       return i2c_add_driver(&stmpe_i2c_driver);
+}
+subsys_initcall(stmpe_init);
+
+static void __exit stmpe_exit(void)
+{
+       i2c_del_driver(&stmpe_i2c_driver);
+}
+module_exit(stmpe_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("STMPE MFD I2C Interface Driver");
+MODULE_AUTHOR("Rabin Vincent <rabin.vincent@stericsson.com>");