This is a note to let you know that I've just added the patch titled
counter: ti-eqep: enable clock at probe
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
counter-ti-eqep-enable-clock-at-probe.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 31082bd502218aad7f8d6b4b091a599f0f8b7530
Author: David Lechner <dlechner@xxxxxxxxxxxx>
Date: Fri Jun 21 17:22:40 2024 -0500
counter: ti-eqep: enable clock at probe
[ Upstream commit 0cf81c73e4c6a4861128a8f27861176ec312af4e ]
The TI eQEP clock is both a functional and interface clock. Since it is
required for the device to function, we should be enabling it at probe.
Up to now, we've just been lucky that the clock was enabled by something
else on the system already.
Fixes: f213729f6796 ("counter: new TI eQEP driver")
Reviewed-by: Judith Mendez <jm@xxxxxx>
Signed-off-by: David Lechner <dlechner@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240621-ti-eqep-enable-clock-v2-1-edd3421b54d4@xxxxxxxxxxxx
Signed-off-by: William Breathitt Gray <wbg@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/counter/ti-eqep.c b/drivers/counter/ti-eqep.c
index 65df9ef5b5bc0..6343998819296 100644
--- a/drivers/counter/ti-eqep.c
+++ b/drivers/counter/ti-eqep.c
@@ -6,6 +6,7 @@
*/
#include <linux/bitops.h>
+#include <linux/clk.h>
#include <linux/counter.h>
#include <linux/kernel.h>
#include <linux/mod_devicetable.h>
@@ -349,6 +350,7 @@ static int ti_eqep_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct ti_eqep_cnt *priv;
void __iomem *base;
+ struct clk *clk;
int err;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
@@ -388,6 +390,10 @@ static int ti_eqep_probe(struct platform_device *pdev)
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
+ clk = devm_clk_get_enabled(dev, NULL);
+ if (IS_ERR(clk))
+ return dev_err_probe(dev, PTR_ERR(clk), "failed to enable clock\n");
+
err = counter_register(&priv->counter);
if (err < 0) {
pm_runtime_put_sync(dev);
