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From: Pratyush Yadav
To: Simon Glass ,
CC: Pratyush Yadav , Vignesh Raghavendra ,
Sekhar Nori
Subject: [PATCH v3 2/6] dm: board: complete the initialization of the muxes in
initr_dm()
Date: Fri, 12 Jun 2020 01:15:02 +0530
Message-ID: <20200611194506.7263-3-p.yadav@ti.com>
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From: Jean-Jacques Hiblot
This will probe the multiplexer devices that have a "u-boot,mux-autoprobe"
property. As a consequence they will be put in their idle state.
Signed-off-by: Jean-Jacques Hiblot
Signed-off-by: Pratyush Yadav
Reviewed-by: Simon Glass
---
common/board_r.c | 12 ++++++++++++
drivers/mux/mux-uclass.c | 23 +++++++++++++++++++++++
include/mux.h | 12 ++++++++++++
3 files changed, 47 insertions(+)
diff --git a/common/board_r.c b/common/board_r.c
index fa57fa9b69..aa1f98e851 100644
--- a/common/board_r.c
+++ b/common/board_r.c
@@ -46,6 +46,7 @@
#include
#endif
#include
+#include
#include
#include
#include
@@ -334,6 +335,17 @@ static int initr_dm_devices(void)
return ret;
}
+ if (IS_ENABLED(CONFIG_MULTIPLEXER)) {
+ /*
+ * Initialize the multiplexer controls to their default state.
+ * This must be done early as other drivers may unknowingly
+ * rely on it.
+ */
+ ret = dm_mux_init();
+ if (ret)
+ return ret;
+ }
+
return 0;
}
diff --git a/drivers/mux/mux-uclass.c b/drivers/mux/mux-uclass.c
index 3c89e0a389..3dad466101 100644
--- a/drivers/mux/mux-uclass.c
+++ b/drivers/mux/mux-uclass.c
@@ -303,6 +303,29 @@ static int mux_uclass_post_probe(struct udevice *dev)
return 0;
}
+int dm_mux_init(void)
+{
+ struct uclass *uc;
+ struct udevice *dev;
+ int ret;
+
+ ret = uclass_get(UCLASS_MUX, &uc);
+ if (ret < 0) {
+ log_debug("unable to get MUX uclass\n");
+ return ret;
+ }
+ uclass_foreach_dev(dev, uc) {
+ if (dev_read_bool(dev, "u-boot,mux-autoprobe")) {
+ ret = device_probe(dev);
+ if (ret)
+ log_debug("unable to probe device %s\n",
+ dev->name);
+ }
+ }
+
+ return 0;
+}
+
UCLASS_DRIVER(mux) = {
.id = UCLASS_MUX,
.name = "mux",
diff --git a/include/mux.h b/include/mux.h
index 85eb7d42fc..23844f480a 100644
--- a/include/mux.h
+++ b/include/mux.h
@@ -109,6 +109,13 @@ void mux_control_put(struct mux_control *mux);
*/
struct mux_control *devm_mux_control_get(struct udevice *dev,
const char *mux_name);
+/**
+ * dm_mux_init() - Initialize the multiplexer controls to their default state.
+ *
+ * Return: 0 if OK, -errno otherwise.
+ */
+int dm_mux_init(void);
+
#else
unsigned int mux_control_states(struct mux_control *mux)
{
@@ -142,6 +149,11 @@ struct mux_control *devm_mux_control_get(struct udevice *dev,
{
return NULL;
}
+
+int dm_mux_init(void)
+{
+ return -ENOSYS;
+}
#endif
#endif