From: Pavel Machek <pavel@xxxxxx>
Check that SMBUS APIs are available in touchscreen driver.
Signed-off-by: Pavel Machek <pavel@xxxxxx>
Cc: Trilok Soni <soni.trilok@xxxxxxxxx>
Cc: <arve@xxxxxxxxxxx>
Cc: Brian Swetland <swetland@xxxxxxxxxx>
Cc: Dmitry Torokhov <dtor@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/staging/dream/synaptics_i2c_rmi.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/drivers/staging/dream/synaptics_i2c_rmi.c b/drivers/staging/dream/synaptics_i2c_rmi.c
index ae696d3..4de6bc9 100644
--- a/drivers/staging/dream/synaptics_i2c_rmi.c
+++ b/drivers/staging/dream/synaptics_i2c_rmi.c
@@ -379,6 +379,12 @@ static int __devinit synaptics_ts_probe(
goto err_check_functionality_failed;
}
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
+ pr_err("synaptics_ts_probe: need I2C_FUNC_SMBUS_WORD_DATA\n");
+ ret = -ENODEV;
+ goto err_check_functionality_failed;
+ }
+
ts = kzalloc(sizeof(*ts), GFP_KERNEL);
if (ts == NULL) {
ret = -ENOMEM;
--
1.6.5.5
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