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mfd: atmel-hlcdc: Return in case of error

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For HLCDC timing engine configurations bit ATMEL_HLCDC_SIP of
ATMEL_HLCDC_SR needs to be polled before applying new config. In case of
timeout there is no indicator about this, so, return in case of timeout
and also print a message about this.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Claudiu Beznea 2019-12-18 14:28:27 +02:00 committed by Lee Jones
parent 4b1ca3a404
commit 10f9167664
1 changed files with 10 additions and 3 deletions
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11
drivers/mfd/atmel-hlcdc.c
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@ -40,10 +40,17 @@ static int regmap_atmel_hlcdc_reg_write(void *context, unsigned int reg,
if (reg <= ATMEL_HLCDC_DIS) {
u32 status;
int ret;
readl_poll_timeout_atomic(hregmap->regs + ATMEL_HLCDC_SR,
status, !(status & ATMEL_HLCDC_SIP),
ret = readl_poll_timeout_atomic(hregmap->regs + ATMEL_HLCDC_SR,
status,
!(status & ATMEL_HLCDC_SIP),
1, 100);
if (ret) {
dev_err(hregmap->dev,
"Timeout! Clock domain synchronization is in progress!\n");
return ret;
}
}
writel(val, hregmap->regs + reg);