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PM / devfreq: mtk-cci: Handle sram regulator probe deferral 

If the regulator_get_optional()	call for the SRAM regulator returns
a probe deferral, we must bail out and retry probing later: failing
to do this will	produce	unstabilities on platforms requiring the
handling for this regulator.

Fixes: b615b00c42da ("PM / devfreq: mediatek: Introduce MediaTek CCI devfreq driver")
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
This commit is contained in:
AngeloGioacchino Del Regno 2022-07-13 13:15:11 +02:00 committed by Chanwoo Choi
parent 521a547ced
commit e09bd5757b
1 changed files with 6 additions and 2 deletions
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8
drivers/devfreq/mtk-cci-devfreq.c
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@ -291,9 +291,13 @@ static int mtk_ccifreq_probe(struct platform_device *pdev)
}
drv->sram_reg = devm_regulator_get_optional(dev, "sram");
if (IS_ERR(drv->sram_reg))
if (IS_ERR(drv->sram_reg)) {
ret = PTR_ERR(drv->sram_reg);
if (ret == -EPROBE_DEFER)
goto out_free_resources;
drv->sram_reg = NULL;
else {
} else {
ret = regulator_enable(drv->sram_reg);
if (ret) {
dev_err(dev, "failed to enable sram regulator\n");