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cpufreq: mediatek: 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: ffa7bdf7f3 ("cpufreq: mediatek: Make sram regulator optional")
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
AngeloGioacchino Del Regno 2022-07-13 13:15:36 +02:00 committed by Viresh Kumar
parent be4b61ec45
commit d2394860b4
1 changed files with 6 additions and 2 deletions
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8
drivers/cpufreq/mediatek-cpufreq.c
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@ -439,9 +439,13 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
/* Both presence and absence of sram regulator are valid cases. */
info->sram_reg = regulator_get_optional(cpu_dev, "sram");
if (IS_ERR(info->sram_reg))
if (IS_ERR(info->sram_reg)) {
ret = PTR_ERR(info->sram_reg);
if (ret == -EPROBE_DEFER)
goto out_free_resources;
info->sram_reg = NULL;
else {
} else {
ret = regulator_enable(info->sram_reg);
if (ret) {
dev_warn(cpu_dev, "cpu%d: failed to enable vsram\n", cpu);