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iio: Aspeed ADC - Handle return value of clk_prepare_enable 

clk_prepare_enable() can fail here and we must check its return value.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Reviewed-by: Rick Altherr <raltherr@google.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Arvind Yadav 2017-05-29 13:12:12 +05:30 committed by Jonathan Cameron
parent 440d303c77
commit 4e36a8ad4d
1 changed files with 5 additions and 1 deletions
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6
drivers/iio/adc/aspeed_adc.c
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@ -212,7 +212,10 @@ static int aspeed_adc_probe(struct platform_device *pdev)
} }
/* Start all channels in normal mode. */ /* Start all channels in normal mode. */
clk_prepare_enable(data->clk_scaler->clk); ret = clk_prepare_enable(data->clk_scaler->clk);
if (ret)
goto clk_enable_error;
adc_engine_control_reg_val = GENMASK(31, 16) | adc_engine_control_reg_val = GENMASK(31, 16) |
ASPEED_OPERATION_MODE_NORMAL | ASPEED_ENGINE_ENABLE; ASPEED_OPERATION_MODE_NORMAL | ASPEED_ENGINE_ENABLE;
writel(adc_engine_control_reg_val, writel(adc_engine_control_reg_val,
@ -236,6 +239,7 @@ iio_register_error:
writel(ASPEED_OPERATION_MODE_POWER_DOWN, writel(ASPEED_OPERATION_MODE_POWER_DOWN,
data->base + ASPEED_REG_ENGINE_CONTROL); data->base + ASPEED_REG_ENGINE_CONTROL);
clk_disable_unprepare(data->clk_scaler->clk); clk_disable_unprepare(data->clk_scaler->clk);
clk_enable_error:
clk_hw_unregister_divider(data->clk_scaler); clk_hw_unregister_divider(data->clk_scaler);
scaler_error: scaler_error: