[media] stv090x: added function to control GPIOs from the outside
This patch STV090X adds and exports a function to control the GPIOs of
the stv090x-devices.
Cc: Manu Abraham <abraham.manu@gmail.com>
Signed-off-by: Martin Wilks <m.wilks@technisat.com>
Signed-off-by: Patrick Boettcher <pboettcher@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/dvb/frontends/stv090x.c b/drivers/media/dvb/frontends/stv090x.c
index 4e0fc2c..63cb4f8 100644
--- a/drivers/media/dvb/frontends/stv090x.c
+++ b/drivers/media/dvb/frontends/stv090x.c
@@ -4516,6 +4516,20 @@
return -1;
}
+int stv090x_set_gpio(struct dvb_frontend *fe, u8 gpio, u8 dir, u8 value,
+ u8 xor_value)
+{
+ struct stv090x_state *state = fe->demodulator_priv;
+ u8 reg = 0;
+
+ STV090x_SETFIELD(reg, GPIOx_OPD_FIELD, dir);
+ STV090x_SETFIELD(reg, GPIOx_CONFIG_FIELD, value);
+ STV090x_SETFIELD(reg, GPIOx_XOR_FIELD, xor_value);
+
+ return stv090x_write_reg(state, STV090x_GPIOxCFG(gpio), reg);
+}
+EXPORT_SYMBOL(stv090x_set_gpio);
+
static struct dvb_frontend_ops stv090x_ops = {
.info = {
diff --git a/drivers/media/dvb/frontends/stv090x.h b/drivers/media/dvb/frontends/stv090x.h
index dd1b93a..11754f2 100644
--- a/drivers/media/dvb/frontends/stv090x.h
+++ b/drivers/media/dvb/frontends/stv090x.h
@@ -104,6 +104,11 @@
extern struct dvb_frontend *stv090x_attach(const struct stv090x_config *config,
struct i2c_adapter *i2c,
enum stv090x_demodulator demod);
+
+/* dir = 0 -> output, dir = 1 -> input/open-drain */
+extern int stv090x_set_gpio(struct dvb_frontend *fe, u8 gpio,
+ u8 dir, u8 value, u8 xor_value);
+
#else
static inline struct dvb_frontend *stv090x_attach(const struct stv090x_config *config,
@@ -113,6 +118,13 @@
printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
return NULL;
}
+
+static inline int stv090x_set_gpio(struct dvb_frontend *fe, u8 gpio,
+ u8 opd, u8 value, u8 xor_value)
+{
+ printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
+ return -ENODEV;
+}
#endif /* CONFIG_DVB_STV090x */
#endif /* __STV090x_H */