Commit 0cf81c73 authored by David Lechner's avatar David Lechner Committed by William Breathitt Gray
Browse files

counter: ti-eqep: enable clock at probe 



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: f213729f ("counter: new TI eQEP driver")
Reviewed-by: default avatarJudith Mendez <jm@ti.com>
Signed-off-by: default avatarDavid Lechner <dlechner@baylibre.com>
Link: https://lore.kernel.org/r/20240621-ti-eqep-enable-clock-v2-1-edd3421b54d4@baylibre.com


Signed-off-by: default avatarWilliam Breathitt Gray <wbg@kernel.org>
parent 1613e604

drivers/counter/ti-eqep.c

+6 −0
Original line number Diff line number Diff line
@@ -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>
@@ -376,6 +377,7 @@ static int ti_eqep_probe(struct platform_device *pdev) 
	struct counter_device *counter;

	struct ti_eqep_cnt *priv;

	void __iomem *base;

	struct clk *clk;

	int err;



	counter = devm_counter_alloc(dev, sizeof(*priv));
@@ -415,6 +417,10 @@ 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_add(counter);

	if (err < 0) {

		pm_runtime_put_sync(dev);