In case of system with several pin-controller device, probe the first
UCLASS_PINCTRL by seq number (defined by alias) to avoid race condition
with I2C PINCONTROL driver for GPIO expander (GPIO expander need I2C bus,
I2C driver need PINCONFIG).
Signed-off-by: Patrick DELAUNAY <patrick.delau...@st.com>
Signed-off-by: Patrice Chotard <patrice.chot...@st.com>
---
drivers/pinctrl/pinctrl-uclass.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/drivers/pinctrl/pinctrl-uclass.c b/drivers/pinctrl/pinctrl-uclass.c
index 0e3260afd1ee..abb622cfe79e 100644
--- a/drivers/pinctrl/pinctrl-uclass.c
+++ b/drivers/pinctrl/pinctrl-uclass.c
@@ -201,11 +201,14 @@ static int pinctrl_select_state_simple(struct udevice
*dev)
int ret;
/*
- * For simplicity, assume the first device of PINCTRL uclass
- * is the correct one. This is most likely OK as there is
- * usually only one pinctrl device on the system.
+ * For most system, there is only one pincontroller device. But in
+ * case of multiple pincontroller devices, probe the one with sequence
+ * number 0 (defined by alias) to avoid race condition.
*/
- ret = uclass_get_device(UCLASS_PINCTRL, 0, &pctldev);
+ ret = uclass_get_device_by_seq(UCLASS_PINCTRL, 0, &pctldev);
+ if (ret)
+ /* if not found, get the first one */
+ ret = uclass_get_device(UCLASS_PINCTRL, 0, &pctldev);
if (ret)
return ret;
--
1.9.1
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