[PATCH] i2c: rk3x: enable clock before getting rate

John Keeping
2021-10-04T13:52:28Z

clk_get_rate() is documented as requiring the clock to be enabled.
Ensure that the bus clock is enabled before calling clk_get_rate() in
rk3x_i2c_probe() to satisfy this requirement.

Signed-off-by: John Keeping <john@metanate.com>
---
drivers/i2c/busses/i2c-rk3x.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/drivers/i2c/busses/i2c-rk3x.c b/drivers/i2c/busses/i2c-rk3x.c
index 819ab4ee517e..332755fab2a1 100644
--- a/drivers/i2c/busses/i2c-rk3x.c
+++ b/drivers/i2c/busses/i2c-rk3x.c
@@ -1338,8 +1338,15 @@ static int rk3x_i2c_probe(struct platform_device *pdev)
goto err_pclk;
}

+ ret = clk_enable(i2c->clk);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Can't enable bus clk: %d\n", ret);
+ goto err_clk_notifier;
+ }
+
clk_rate = clk_get_rate(i2c->clk);
rk3x_i2c_adapt_div(i2c, clk_rate);
+ clk_disable(i2c->clk);

ret = i2c_add_adapter(&i2c->adap);
if (ret < 0)
--
2.33.0