Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / input / touchscreen / cyttsp_i2c_common.c

diff --git a/kernel/drivers/input/touchscreen/cyttsp_i2c_common.c b/kernel/drivers/input/touchscreen/cyttsp_i2c_common.c
new file mode 100644 (file)
index 0000000..ccefa56
--- /dev/null
+++ b/kernel/drivers/input/touchscreen/cyttsp_i2c_common.c
@@ -0,0 +1,95 @@
+/*
+ * cyttsp_i2c_common.c
+ * Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver.
+ * For use with Cypress Txx3xx and Txx4xx parts.
+ * Supported parts include:
+ * CY8CTST341
+ * CY8CTMA340
+ * TMA4XX
+ * TMA1036
+ *
+ * Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
+ * Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2, and only version 2, as published by the
+ * Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/export.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/types.h>
+
+#include "cyttsp4_core.h"
+
+int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf,
+                                     u16 addr, u8 length, void *values)
+{
+       struct i2c_client *client = to_i2c_client(dev);
+       u8 client_addr = client->addr | ((addr >> 8) & 0x1);
+       u8 addr_lo = addr & 0xFF;
+       struct i2c_msg msgs[] = {
+               {
+                       .addr = client_addr,
+                       .flags = 0,
+                       .len = 1,
+                       .buf = &addr_lo,
+               },
+               {
+                       .addr = client_addr,
+                       .flags = I2C_M_RD,
+                       .len = length,
+                       .buf = values,
+               },
+       };
+       int retval;
+
+       retval = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+       if (retval < 0)
+               return retval;
+
+       return retval != ARRAY_SIZE(msgs) ? -EIO : 0;
+}
+EXPORT_SYMBOL_GPL(cyttsp_i2c_read_block_data);
+
+int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf,
+                                      u16 addr, u8 length, const void *values)
+{
+       struct i2c_client *client = to_i2c_client(dev);
+       u8 client_addr = client->addr | ((addr >> 8) & 0x1);
+       u8 addr_lo = addr & 0xFF;
+       struct i2c_msg msgs[] = {
+               {
+                       .addr = client_addr,
+                       .flags = 0,
+                       .len = length + 1,
+                       .buf = xfer_buf,
+               },
+       };
+       int retval;
+
+       xfer_buf[0] = addr_lo;
+       memcpy(&xfer_buf[1], values, length);
+
+       retval = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+       if (retval < 0)
+               return retval;
+
+       return retval != ARRAY_SIZE(msgs) ? -EIO : 0;
+}
+EXPORT_SYMBOL_GPL(cyttsp_i2c_write_block_data);
+
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Cypress");