misc: atmel_tclib: get and use slow clock
Commit dca1a4b5ff6e ("clk: at91: keep slow clk enabled to prevent system
hang") added a workaround for the slow clock as it is not properly handled
by its users.
Get and use the slow clock as it is necessary for the timer counters.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Thierry Reding <thierry.reding@gmail.com>
diff --git a/drivers/misc/atmel_tclib.c b/drivers/misc/atmel_tclib.c
index 0ca05c3..ac24a4b 100644
--- a/drivers/misc/atmel_tclib.c
+++ b/drivers/misc/atmel_tclib.c
@@ -125,6 +125,10 @@
if (IS_ERR(clk))
return PTR_ERR(clk);
+ tc->slow_clk = devm_clk_get(&pdev->dev, "slow_clk");
+ if (IS_ERR(tc->slow_clk))
+ return PTR_ERR(tc->slow_clk);
+
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
tc->regs = devm_ioremap_resource(&pdev->dev, r);
if (IS_ERR(tc->regs))