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authorAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>2022-07-13 14:15:11 +0300
committerChanwoo Choi <cw00.choi@samsung.com>2022-09-25 21:59:12 +0300
commite09bd5757b5227d6804b30c58d4587f7f87d1afa (patch)
tree6d89078b377b2939f4213fb3c7dd0b9d87fd60c7
parent521a547ced6477c54b4b0cc206000406c221b4d6 (diff)
downloadlinux-e09bd5757b5227d6804b30c58d4587f7f87d1afa.tar.xz
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>
-rw-r--r--drivers/devfreq/mtk-cci-devfreq.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/devfreq/mtk-cci-devfreq.c b/drivers/devfreq/mtk-cci-devfreq.c
index 71abb3fbd042..e5458ada5197 100644
--- a/drivers/devfreq/mtk-cci-devfreq.c
+++ b/drivers/devfreq/mtk-cci-devfreq.c
@@ -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");