diff options
Diffstat (limited to 'target/linux/mediatek/patches-5.15/350-06-cpufreq-mediatek-Record-previous-target-vproc-value.patch')
| -rw-r--r-- | target/linux/mediatek/patches-5.15/350-06-cpufreq-mediatek-Record-previous-target-vproc-value.patch | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches-5.15/350-06-cpufreq-mediatek-Record-previous-target-vproc-value.patch b/target/linux/mediatek/patches-5.15/350-06-cpufreq-mediatek-Record-previous-target-vproc-value.patch new file mode 100644 index 0000000000..94e6617d26 --- /dev/null +++ b/target/linux/mediatek/patches-5.15/350-06-cpufreq-mediatek-Record-previous-target-vproc-value.patch @@ -0,0 +1,64 @@ +From 34737eb8d0daa0d4183f10286a2f55d8788066bc Mon Sep 17 00:00:00 2001 +From: Jia-Wei Chang <jia-wei.chang@mediatek.com> +Date: Fri, 22 Apr 2022 15:52:29 +0800 +Subject: [PATCH 06/21] cpufreq: mediatek: Record previous target vproc value + +We found the buck voltage may not be exactly the same with what we set +because CPU may share the same buck with other module. +Therefore, we need to record the previous desired value instead of reading +it from regulators. + +Signed-off-by: Andrew-sh.Cheng <andrew-sh.cheng@mediatek.com> +Signed-off-by: Jia-Wei Chang <jia-wei.chang@mediatek.com> +Signed-off-by: Rex-BC Chen <rex-bc.chen@mediatek.com> +Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> +Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> +--- + drivers/cpufreq/mediatek-cpufreq.c | 20 ++++++++++++++++---- + 1 file changed, 16 insertions(+), 4 deletions(-) + +--- a/drivers/cpufreq/mediatek-cpufreq.c ++++ b/drivers/cpufreq/mediatek-cpufreq.c +@@ -40,6 +40,7 @@ struct mtk_cpu_dvfs_info { + struct list_head list_head; + int intermediate_voltage; + bool need_voltage_tracking; ++ int pre_vproc; + }; + + static struct platform_device *cpufreq_pdev; +@@ -193,11 +194,17 @@ static int mtk_cpufreq_voltage_tracking( + + static int mtk_cpufreq_set_voltage(struct mtk_cpu_dvfs_info *info, int vproc) + { ++ int ret; ++ + if (info->need_voltage_tracking) +- return mtk_cpufreq_voltage_tracking(info, vproc); ++ ret = mtk_cpufreq_voltage_tracking(info, vproc); + else +- return regulator_set_voltage(info->proc_reg, vproc, +- vproc + VOLT_TOL); ++ ret = regulator_set_voltage(info->proc_reg, vproc, ++ MAX_VOLT_LIMIT); ++ if (!ret) ++ info->pre_vproc = vproc; ++ ++ return ret; + } + + static int mtk_cpufreq_set_target(struct cpufreq_policy *policy, +@@ -215,7 +222,12 @@ static int mtk_cpufreq_set_target(struct + inter_vproc = info->intermediate_voltage; + + pre_freq_hz = clk_get_rate(cpu_clk); +- pre_vproc = regulator_get_voltage(info->proc_reg); ++ ++ if (unlikely(info->pre_vproc <= 0)) ++ pre_vproc = regulator_get_voltage(info->proc_reg); ++ else ++ pre_vproc = info->pre_vproc; ++ + if (pre_vproc < 0) { + dev_err(cpu_dev, "invalid Vproc value: %d\n", pre_vproc); + return pre_vproc; |