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Message-ID: <20230921052637.30444-4-chun-jen.tseng@mediatek.com>
Date: Thu, 21 Sep 2023 13:26:37 +0800
From: Mark Tseng <chun-jen.tseng@...iatek.com>
To: Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
Roger Lu <roger.lu@...iatek.com>,
Kevin Hilman <khilman@...nel.org>
CC: <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>,
<Project_Global_Chrome_Upstream_Group@...iatek.com>,
<chun-jen.tseng@...iatek.com>
Subject: [PATCH v4 3/3] soc: mediatek: svs: Add support for voltage bins
Add support voltage bins turn point
Signed-off-by: Mark Tseng <chun-jen.tseng@...iatek.com>
---
drivers/soc/mediatek/mtk-svs.c | 57 +++++++++++++++++++++++++++++++---
1 file changed, 53 insertions(+), 4 deletions(-)
diff --git a/drivers/soc/mediatek/mtk-svs.c b/drivers/soc/mediatek/mtk-svs.c
index d2ae0b0cf95a..f31e3bedff50 100644
--- a/drivers/soc/mediatek/mtk-svs.c
+++ b/drivers/soc/mediatek/mtk-svs.c
@@ -407,6 +407,7 @@ struct svs_platform_data {
* @dcbdet: svs efuse data
* @dcmdet: svs efuse data
* @turn_pt: 2-line turn point tells which opp_volt calculated by high/low bank
+ * @vbin_turn_pt: voltage bin turn point helps know which svsb_volt should be overridden
* @type: bank type to represent it is 2-line (high/low) bank or 1-line bank
*
* Svs bank will generate suitalbe voltages by below general math equation
@@ -469,6 +470,7 @@ struct svs_bank {
u32 dcbdet;
u32 dcmdet;
u32 turn_pt;
+ u32 vbin_turn_pt;
u32 type;
};
@@ -751,11 +753,12 @@ static int svs_status_debug_show(struct seq_file *m, void *v)
ret = thermal_zone_get_temp(svsb->tzd, &tzone_temp);
if (ret)
- seq_printf(m, "%s: temperature ignore, turn_pt = %u\n",
- svsb->name, svsb->turn_pt);
+ seq_printf(m, "%s: temperature ignore, vbin_turn_pt = %u, turn_pt = %u\n",
+ svsb->name, svsb->vbin_turn_pt, svsb->turn_pt);
else
- seq_printf(m, "%s: temperature = %d, turn_pt = %u\n",
- svsb->name, tzone_temp, svsb->turn_pt);
+ seq_printf(m, "%s: temperature = %d, vbin_turn_pt = %u, turn_pt = %u\n",
+ svsb->name, tzone_temp, svsb->vbin_turn_pt,
+ svsb->turn_pt);
for (i = 0; i < svsb->opp_count; i++) {
opp = dev_pm_opp_find_freq_exact(svsb->opp_dev,
@@ -952,6 +955,29 @@ static void svs_get_bank_volts_v3(struct svs_platform *svsp)
for (i = opp_start; i < opp_stop; i++)
if (svsb->volt_flags & SVSB_REMOVE_DVTFIXED_VOLT)
svsb->volt[i] -= svsb->dvt_fixed;
+
+ /* For voltage bin support */
+ if (svsb->opp_dfreq[0] > svsb->freq_base) {
+ svsb->volt[0] = svs_opp_volt_to_bank_volt(svsb->opp_dvolt[0],
+ svsb->volt_step,
+ svsb->volt_base);
+
+ /* Find voltage bin turn point */
+ for (i = 0; i < svsb->opp_count; i++) {
+ if (svsb->opp_dfreq[i] <= svsb->freq_base) {
+ svsb->vbin_turn_pt = i;
+ break;
+ }
+ }
+
+ /* Override svs bank voltages */
+ for (i = 1; i < svsb->vbin_turn_pt; i++)
+ svsb->volt[i] = interpolate(svsb->freq_pct[0],
+ svsb->freq_pct[svsb->vbin_turn_pt],
+ svsb->volt[0],
+ svsb->volt[svsb->vbin_turn_pt],
+ svsb->freq_pct[i]);
+ }
}
static void svs_set_bank_freq_pct_v3(struct svs_platform *svsp)
@@ -1069,6 +1095,29 @@ static void svs_get_bank_volts_v2(struct svs_platform *svsp)
for (i = 0; i < svsb->opp_count; i++)
svsb->volt[i] += svsb->volt_od;
+
+ /* For voltage bin support */
+ if (svsb->opp_dfreq[0] > svsb->freq_base) {
+ svsb->volt[0] = svs_opp_volt_to_bank_volt(svsb->opp_dvolt[0],
+ svsb->volt_step,
+ svsb->volt_base);
+
+ /* Find voltage bin turn point */
+ for (i = 0; i < svsb->opp_count; i++) {
+ if (svsb->opp_dfreq[i] <= svsb->freq_base) {
+ svsb->vbin_turn_pt = i;
+ break;
+ }
+ }
+
+ /* Override svs bank voltages */
+ for (i = 1; i < svsb->vbin_turn_pt; i++)
+ svsb->volt[i] = interpolate(svsb->freq_pct[0],
+ svsb->freq_pct[svsb->vbin_turn_pt],
+ svsb->volt[0],
+ svsb->volt[svsb->vbin_turn_pt],
+ svsb->freq_pct[i]);
+ }
}
static void svs_set_bank_freq_pct_v2(struct svs_platform *svsp)
--
2.18.0
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