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Input: lpc32xx_ts - check for clk_prepare_enable() error

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clk_prepare_enable() may fail, so we better check its return value and
propagate it in the case of error.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Fabio Estevam 2017-04-12 08:34:03 -07:00 committed by Dmitry Torokhov
parent c286841720
commit 71f9f08103
1 changed files with 8 additions and 5 deletions
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13
drivers/input/touchscreen/lpc32xx_ts.c
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@ -142,11 +142,14 @@ static void lpc32xx_stop_tsc(struct lpc32xx_tsc *tsc)
clk_disable_unprepare(tsc->clk);
}
static void lpc32xx_setup_tsc(struct lpc32xx_tsc *tsc)
static int lpc32xx_setup_tsc(struct lpc32xx_tsc *tsc)
{
u32 tmp;
int err;
clk_prepare_enable(tsc->clk);
err = clk_prepare_enable(tsc->clk);
if (err)
return err;
tmp = tsc_readl(tsc, LPC32XX_TSC_CON) & ~LPC32XX_TSC_ADCCON_POWER_UP;
@ -184,15 +187,15 @@ static void lpc32xx_setup_tsc(struct lpc32xx_tsc *tsc)
/* Enable automatic ts event capture */
tsc_writel(tsc, LPC32XX_TSC_CON, tmp | LPC32XX_TSC_ADCCON_AUTO_EN);
return 0;
}
static int lpc32xx_ts_open(struct input_dev *dev)
{
struct lpc32xx_tsc *tsc = input_get_drvdata(dev);
lpc32xx_setup_tsc(tsc);
return 0;
return lpc32xx_setup_tsc(tsc);
}
static void lpc32xx_ts_close(struct input_dev *dev)