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path: root/drivers/input/touchscreen/cyttsp_i2c_common.c
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Diffstat (limited to 'drivers/input/touchscreen/cyttsp_i2c_common.c')
-rw-r--r--drivers/input/touchscreen/cyttsp_i2c_common.c30
1 files changed, 22 insertions, 8 deletions
diff --git a/drivers/input/touchscreen/cyttsp_i2c_common.c b/drivers/input/touchscreen/cyttsp_i2c_common.c
index 07c553fbcef..1d7b6f15416 100644
--- a/drivers/input/touchscreen/cyttsp_i2c_common.c
+++ b/drivers/input/touchscreen/cyttsp_i2c_common.c
@@ -32,18 +32,20 @@
#include <linux/types.h>
int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf,
- u8 addr, u8 length, void *values)
+ 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,
+ .addr = client_addr,
.flags = 0,
.len = 1,
- .buf = &addr,
+ .buf = &addr_lo,
},
{
- .addr = client->addr,
+ .addr = client_addr,
.flags = I2C_M_RD,
.len = length,
.buf = values,
@@ -60,17 +62,29 @@ int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf,
EXPORT_SYMBOL_GPL(cyttsp_i2c_read_block_data);
int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf,
- u8 addr, u8 length, const void *values)
+ 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;
+ xfer_buf[0] = addr_lo;
memcpy(&xfer_buf[1], values, length);
- retval = i2c_master_send(client, xfer_buf, length + 1);
+ retval = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+ if (retval < 0)
+ return retval;
- return retval < 0 ? retval : 0;
+ return retval != ARRAY_SIZE(msgs) ? -EIO : 0;
}
EXPORT_SYMBOL_GPL(cyttsp_i2c_write_block_data);