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counter: ti-eqep: enable clock at probe

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[ 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@ti.com>
Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://lore.kernel.org/r/20240621-ti-eqep-enable-clock-v2-1-edd3421b54d4@baylibre.com
Signed-off-by: William Breathitt Gray <wbg@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
David Lechner 2024-06-21 17:22:40 -05:00 committed by Greg Kroah-Hartman
parent 76da476a4c
commit 78ece307f8
1 changed files with 6 additions and 0 deletions
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6
drivers/counter/ti-eqep.c
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@ -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);