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Input: cyttsp4 - use 16bit address for I2C/SPI communication

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In TSG4, register map is 512bytes long and to access all of it,
one bit from address byte is used (which bit to use differs for
I2C and SPI);

Since common code used for TSG3 and TSG4 for I2C, this parameter
wrongly used as u8. TSG3 does not access beyond 255 bytes
but TSG4 may.

Tested-on:TMA3XX DVB && TMA4XX DVB

Signed-off-by: Ferruh Yigit <fery@cypress.com>
Acked-by: Javier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Ferruh Yigit
2013-07-04 14:02:57 -07:00
committed by Dmitry Torokhov
parent 57961e3ba7
commit 62f548d0c2
5 changed files with 44 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
drivers/input/touchscreen/cyttsp_i2c_common.c
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@@ -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);