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65 lines
2.2 KiB
Diff
65 lines
2.2 KiB
Diff
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From 34737eb8d0daa0d4183f10286a2f55d8788066bc Mon Sep 17 00:00:00 2001
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From: Jia-Wei Chang <jia-wei.chang@mediatek.com>
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Date: Fri, 22 Apr 2022 15:52:29 +0800
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Subject: [PATCH 06/21] cpufreq: mediatek: Record previous target vproc value
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We found the buck voltage may not be exactly the same with what we set
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because CPU may share the same buck with other module.
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Therefore, we need to record the previous desired value instead of reading
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it from regulators.
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Signed-off-by: Andrew-sh.Cheng <andrew-sh.cheng@mediatek.com>
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Signed-off-by: Jia-Wei Chang <jia-wei.chang@mediatek.com>
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Signed-off-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
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Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
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Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
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---
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drivers/cpufreq/mediatek-cpufreq.c | 20 ++++++++++++++++----
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1 file changed, 16 insertions(+), 4 deletions(-)
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--- a/drivers/cpufreq/mediatek-cpufreq.c
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+++ b/drivers/cpufreq/mediatek-cpufreq.c
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@@ -40,6 +40,7 @@ struct mtk_cpu_dvfs_info {
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struct list_head list_head;
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int intermediate_voltage;
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bool need_voltage_tracking;
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+ int pre_vproc;
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};
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static struct platform_device *cpufreq_pdev;
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@@ -193,11 +194,17 @@ static int mtk_cpufreq_voltage_tracking(
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static int mtk_cpufreq_set_voltage(struct mtk_cpu_dvfs_info *info, int vproc)
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{
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+ int ret;
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+
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if (info->need_voltage_tracking)
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- return mtk_cpufreq_voltage_tracking(info, vproc);
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+ ret = mtk_cpufreq_voltage_tracking(info, vproc);
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else
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- return regulator_set_voltage(info->proc_reg, vproc,
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- vproc + VOLT_TOL);
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+ ret = regulator_set_voltage(info->proc_reg, vproc,
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+ MAX_VOLT_LIMIT);
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+ if (!ret)
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+ info->pre_vproc = vproc;
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+
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+ return ret;
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}
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static int mtk_cpufreq_set_target(struct cpufreq_policy *policy,
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@@ -215,7 +222,12 @@ static int mtk_cpufreq_set_target(struct
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inter_vproc = info->intermediate_voltage;
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pre_freq_hz = clk_get_rate(cpu_clk);
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- pre_vproc = regulator_get_voltage(info->proc_reg);
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+
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+ if (unlikely(info->pre_vproc <= 0))
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+ pre_vproc = regulator_get_voltage(info->proc_reg);
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+ else
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+ pre_vproc = info->pre_vproc;
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+
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if (pre_vproc < 0) {
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dev_err(cpu_dev, "invalid Vproc value: %d\n", pre_vproc);
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return pre_vproc;
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