Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / mfd / smsc-ece1099.c

diff --git a/kernel/drivers/mfd/smsc-ece1099.c b/kernel/drivers/mfd/smsc-ece1099.c
new file mode 100644 (file)
index 0000000..0324688
--- /dev/null
+++ b/kernel/drivers/mfd/smsc-ece1099.c
@@ -0,0 +1,112 @@
+/*
+ * TI SMSC MFD Driver
+ *
+ * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * Author: Sourav Poddar <sourav.poddar@ti.com>
+ *
+ *  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;  GPL v2.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/gpio.h>
+#include <linux/workqueue.h>
+#include <linux/irq.h>
+#include <linux/regmap.h>
+#include <linux/err.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/smsc.h>
+#include <linux/of_platform.h>
+
+static const struct regmap_config smsc_regmap_config = {
+               .reg_bits = 8,
+               .val_bits = 8,
+               .max_register = SMSC_VEN_ID_H,
+               .cache_type = REGCACHE_RBTREE,
+};
+
+static int smsc_i2c_probe(struct i2c_client *i2c,
+                       const struct i2c_device_id *id)
+{
+       struct smsc *smsc;
+       int devid, rev, venid_l, venid_h;
+       int ret = 0;
+
+       smsc = devm_kzalloc(&i2c->dev, sizeof(struct smsc),
+                               GFP_KERNEL);
+       if (!smsc) {
+               dev_err(&i2c->dev, "smsc mfd driver memory allocation failed\n");
+               return -ENOMEM;
+       }
+
+       smsc->regmap = devm_regmap_init_i2c(i2c, &smsc_regmap_config);
+       if (IS_ERR(smsc->regmap)) {
+               ret = PTR_ERR(smsc->regmap);
+               goto err;
+       }
+
+       i2c_set_clientdata(i2c, smsc);
+       smsc->dev = &i2c->dev;
+
+#ifdef CONFIG_OF
+       of_property_read_u32(i2c->dev.of_node, "clock", &smsc->clk);
+#endif
+
+       regmap_read(smsc->regmap, SMSC_DEV_ID, &devid);
+       regmap_read(smsc->regmap, SMSC_DEV_REV, &rev);
+       regmap_read(smsc->regmap, SMSC_VEN_ID_L, &venid_l);
+       regmap_read(smsc->regmap, SMSC_VEN_ID_H, &venid_h);
+
+       dev_info(&i2c->dev, "SMSCxxx devid: %02x rev: %02x venid: %02x\n",
+               devid, rev, (venid_h << 8) | venid_l);
+
+       ret = regmap_write(smsc->regmap, SMSC_CLK_CTRL, smsc->clk);
+       if (ret)
+               goto err;
+
+#ifdef CONFIG_OF
+       if (i2c->dev.of_node)
+               ret = of_platform_populate(i2c->dev.of_node,
+                                          NULL, NULL, &i2c->dev);
+#endif
+
+err:
+       return ret;
+}
+
+static int smsc_i2c_remove(struct i2c_client *i2c)
+{
+       struct smsc *smsc = i2c_get_clientdata(i2c);
+
+       mfd_remove_devices(smsc->dev);
+
+       return 0;
+}
+
+static const struct i2c_device_id smsc_i2c_id[] = {
+       { "smscece1099", 0},
+       {},
+};
+MODULE_DEVICE_TABLE(i2c, smsc_i2c_id);
+
+static struct i2c_driver smsc_i2c_driver = {
+       .driver = {
+                  .name = "smsc",
+                  .owner = THIS_MODULE,
+       },
+       .probe = smsc_i2c_probe,
+       .remove = smsc_i2c_remove,
+       .id_table = smsc_i2c_id,
+};
+
+module_i2c_driver(smsc_i2c_driver);
+
+MODULE_AUTHOR("Sourav Poddar <sourav.poddar@ti.com>");
+MODULE_DESCRIPTION("SMSC chip multi-function driver");
+MODULE_LICENSE("GPL v2");