From b57e90189f208e8e873f532b797f8b649973f7a2 Mon Sep 17 00:00:00 2001 From: John Keeping Date: Mon, 4 Oct 2021 14:15:39 +0100 Subject: [PATCH] i2c: rk3x: enable clock before getting rate 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 Reviewed-by: Heiko Stuebner Signed-off-by: Wolfram Sang --- 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 819ab4e..332755f 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) -- 2.7.4