This patch allows the default mux mode to be specified using
a firmware property.
Signed-off-by: Mats Karrman <mats.dev.l...@gmail.com>
---
drivers/usb/typec/mux/pi3usb30532.c | 18 ++++++++++++++++++
drivers/usb/typec/tcpm.c | 2 +-
include/linux/usb/typec.h | 1 +
3 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/typec/mux/pi3usb30532.c
b/drivers/usb/typec/mux/pi3usb30532.c
index 3e564e6..d1de12c 100644
--- a/drivers/usb/typec/mux/pi3usb30532.c
+++ b/drivers/usb/typec/mux/pi3usb30532.c
@@ -26,6 +26,7 @@ struct pi3usb30532 {
struct mutex lock; /* protects the cached conf register */
struct typec_switch sw;
struct typec_mux mux;
+ enum typec_mux_mode default_mux_mode; /* Mode for TYPEC_MUX_DEFAULT */
u8 mode_support; /* Modes supported by hardware as bit flags */
u8 conf;
};
@@ -84,6 +85,9 @@ static int pi3usb30532_mux_set(struct typec_mux *mux, enum
typec_mux_mode mode)
mutex_lock(&pi->lock);
new_conf = pi->conf;
+ if (mode == TYPEC_MUX_DEFAULT)
+ mode = pi->default_mux_mode;
+
switch (mode) {
default:
case TYPEC_MUX_NONE:
@@ -116,6 +120,7 @@ static int pi3usb30532_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct pi3usb30532 *pi;
+ const char *mode_str;
int ret;
pi = devm_kzalloc(dev, sizeof(*pi), GFP_KERNEL);
@@ -129,6 +134,19 @@ static int pi3usb30532_probe(struct i2c_client *client)
pi->mux.set = pi3usb30532_mux_set;
mutex_init(&pi->lock);
+ if (!device_property_present(dev, "default-mux-mode")) {
+ pi->default_mux_mode = TYPEC_MUX_2CH_USBSS;
+ } else {
+ ret = device_property_read_string(dev, "default-mux-mode",
+ &mode_str);
+ if (ret)
+ return ret;
+ ret = typec_find_mux_mode(mode_str);
+ if (ret < 0)
+ return ret;
+ pi->default_mux_mode = ret;
+ }
+
if (device_property_present(dev, "have-2ch-usbss"))
pi->mode_support |= 0x1 << TYPEC_MUX_2CH_USBSS;
if (device_property_present(dev, "have-4ch-am"))
diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c
index aaf6d57..8a9dc1a 100644
--- a/drivers/usb/typec/tcpm.c
+++ b/drivers/usb/typec/tcpm.c
@@ -790,7 +790,7 @@ static int tcpm_set_roles(struct tcpm_port *port, bool
attached,
else
usb_role = USB_ROLE_DEVICE;
- ret = tcpm_mux_set(port, TYPEC_MUX_2CH_USBSS, usb_role, orientation);
+ ret = tcpm_mux_set(port, TYPEC_MUX_DEFAULT, usb_role, orientation);
if (ret < 0)
return ret;
diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h
index 72cd4a7..85df816 100644
--- a/include/linux/usb/typec.h
+++ b/include/linux/usb/typec.h
@@ -74,6 +74,7 @@ enum typec_orientation {
enum typec_mux_mode {
TYPEC_MUX_NONE, /* Open switch */
+ TYPEC_MUX_DEFAULT, /* Initial mode after connect */
TYPEC_MUX_2CH_USBSS, /* 2ch USB SS */
TYPEC_MUX_4CH_AM, /* 4ch Alt Mode */
TYPEC_MUX_2CH_USBSS_2CH_AM, /* 2ch USB SS + 2ch Alt Mode */
--
2.7.4
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