Commit d2394860 authored Jul 13, 2022 by AngeloGioacchino Del Regno Committed by Viresh Kumar Jul 13, 2022

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: ffa7bdf7 ("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>

parent be4b61ec

drivers/cpufreq/mediatek-cpufreq.c

+6 −2

Original line number	Diff line number	Diff line
		@@ -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);