[PATCH 2/2] soc: mediatek: svs: add support for mt8188

[jia-wei.chang <jia-wei.chang@mediatek.com>]

From: Jia-Wei Chang <jia-wei.chang@mediatek.com>

MT8188 svs gpu uses 2-line high bank and low bank to optimize the
voltage of opp table for higher and lower frequency respectively.

Signed-off-by: Jia-Wei Chang <jia-wei.chang@mediatek.com>
---
 drivers/soc/mediatek/mtk-svs.c | 164 +++++++++++++++++++++++++++++++++
 1 file changed, 164 insertions(+)

diff --git a/drivers/soc/mediatek/mtk-svs.c b/drivers/soc/mediatek/mtk-svs.c
index dd32a7315490..e82a5c62170f 100644
--- a/drivers/soc/mediatek/mtk-svs.c
+++ b/drivers/soc/mediatek/mtk-svs.c
@@ -897,6 +897,29 @@ static void svs_get_bank_volts_v3(struct svs_platform *svsp)
 			svsb->volt[i] -= svsb->dvt_fixed;
 		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_v3(struct svs_platform *svsp)
@@ -1846,6 +1869,80 @@ static bool svs_mt8192_efuse_parsing(struct svs_platform *svsp)
 	return true;
 }
 
+static bool svs_mt8188_efuse_parsing(struct svs_platform *svsp)
+{
+	struct svs_bank *svsb;
+	struct nvmem_cell *cell;
+	u32 idx, i, golden_temp;
+
+	for (i = 0; i < svsp->efuse_max; i++)
+		if (svsp->efuse[i])
+			dev_info(svsp->dev, "M_HW_RES%d: 0x%08x\n",
+				 i, svsp->efuse[i]);
+
+	if (!svsp->efuse[5]) {
+		dev_notice(svsp->dev, "svs_efuse[5] = 0x0?\n");
+		return false;
+	}
+
+	/* Svs efuse parsing */
+	for (idx = 0; idx < svsp->bank_max; idx++) {
+		svsb = &svsp->banks[idx];
+
+		if (svsb->type == SVSB_LOW) {
+			svsb->mtdes = svsp->efuse[5] & GENMASK(7, 0);
+			svsb->bdes = (svsp->efuse[5] >> 16) & GENMASK(7, 0);
+			svsb->mdes = (svsp->efuse[5] >> 24) & GENMASK(7, 0);
+			svsb->dcbdet = (svsp->efuse[15] >> 16) & GENMASK(7, 0);
+			svsb->dcmdet = (svsp->efuse[15] >> 24) & GENMASK(7, 0);
+		} else if (svsb->type == SVSB_HIGH) {
+			svsb->mtdes = svsp->efuse[4] & GENMASK(7, 0);
+			svsb->bdes = (svsp->efuse[4] >> 16) & GENMASK(7, 0);
+			svsb->mdes = (svsp->efuse[4] >> 24) & GENMASK(7, 0);
+			svsb->dcbdet = svsp->efuse[14] & GENMASK(7, 0);
+			svsb->dcmdet = (svsp->efuse[14] >> 8) & GENMASK(7, 0);
+		}
+
+		svsb->vmax += svsb->dvt_fixed;
+	}
+
+	/* Thermal efuse parsing */
+	cell = nvmem_cell_get(svsp->dev, "t-calibration-data");
+	if (IS_ERR_OR_NULL(cell)) {
+		dev_err(svsp->dev, "no \"t-calibration-data\"? %ld\n",
+			PTR_ERR(cell));
+		return false;
+	}
+
+	svsp->tefuse = nvmem_cell_read(cell, &svsp->tefuse_max);
+	if (IS_ERR(svsp->tefuse)) {
+		dev_err(svsp->dev, "cannot read thermal efuse: %ld\n",
+			PTR_ERR(svsp->tefuse));
+		nvmem_cell_put(cell);
+		return false;
+	}
+
+	svsp->tefuse_max /= sizeof(u32);
+	nvmem_cell_put(cell);
+
+	for (i = 0; i < svsp->tefuse_max; i++)
+		if (svsp->tefuse[i] != 0)
+			break;
+
+	if (i == svsp->tefuse_max)
+		golden_temp = 50; /* All thermal efuse data are 0 */
+	else
+		golden_temp = (svsp->tefuse[0] & GENMASK(31, 24)) >> 24;
+
+	for (idx = 0; idx < svsp->bank_max; idx++) {
+		svsb = &svsp->banks[idx];
+		svsb->mts = 500;
+		svsb->bts = (((500 * golden_temp + 250460) / 1000) - 25) * 4;
+	}
+
+	return true;
+}
+
 static bool svs_mt8186_efuse_parsing(struct svs_platform *svsp)
 {
 	struct svs_bank *svsb;
@@ -2454,6 +2551,61 @@ static struct svs_bank svs_mt8192_banks[] = {
 	},
 };
 
+static struct svs_bank svs_mt8188_banks[] = {
+	{
+		.sw_id			= SVSB_GPU,
+		.type			= SVSB_LOW,
+		.set_freq_pct		= svs_set_bank_freq_pct_v3,
+		.get_volts		= svs_get_bank_volts_v3,
+		.volt_flags		= SVSB_REMOVE_DVTFIXED_VOLT,
+		.mode_support		= SVSB_MODE_INIT02,
+		.opp_count		= MAX_OPP_ENTRIES,
+		.freq_base		= 640000000,
+		.turn_freq_base		= 640000000,
+		.volt_step		= 6250,
+		.volt_base		= 400000,
+		.vmax			= 0x38,
+		.vmin			= 0x1c,
+		.age_config		= 0x555555,
+		.dc_config		= 0x555555,
+		.dvt_fixed		= 0x1,
+		.vco			= 0x10,
+		.chk_shift		= 0x87,
+		.core_sel		= 0x0fff0000,
+		.int_st			= BIT(0),
+		.ctl0			= 0x00100003,
+	},
+	{
+		.sw_id			= SVSB_GPU,
+		.type			= SVSB_HIGH,
+		.set_freq_pct		= svs_set_bank_freq_pct_v3,
+		.get_volts		= svs_get_bank_volts_v3,
+		.tzone_name		= "gpu1",
+		.volt_flags		= SVSB_REMOVE_DVTFIXED_VOLT |
+					  SVSB_MON_VOLT_IGNORE,
+		.mode_support		= SVSB_MODE_INIT02 | SVSB_MODE_MON,
+		.opp_count		= MAX_OPP_ENTRIES,
+		.freq_base		= 880000000,
+		.turn_freq_base		= 640000000,
+		.volt_step		= 6250,
+		.volt_base		= 400000,
+		.vmax			= 0x38,
+		.vmin			= 0x1c,
+		.age_config		= 0x555555,
+		.dc_config		= 0x555555,
+		.dvt_fixed		= 0x4,
+		.vco			= 0x10,
+		.chk_shift		= 0x87,
+		.core_sel		= 0x0fff0001,
+		.int_st			= BIT(1),
+		.ctl0			= 0x00100003,
+		.tzone_htemp		= 85000,
+		.tzone_htemp_voffset	= 0,
+		.tzone_ltemp		= 25000,
+		.tzone_ltemp_voffset	= 7,
+	},
+};
+
 static struct svs_bank svs_mt8186_banks[] = {
 	{
 		.sw_id			= SVSB_CPU_BIG,
@@ -2720,6 +2872,15 @@ static const struct svs_platform_data svs_mt8192_platform_data = {
 	.bank_max = ARRAY_SIZE(svs_mt8192_banks),
 };
 
+static const struct svs_platform_data svs_mt8188_platform_data = {
+	.name = "mt8188-svs",
+	.banks = svs_mt8188_banks,
+	.efuse_parsing = svs_mt8188_efuse_parsing,
+	.probe = svs_mt8192_platform_probe,
+	.regs = svs_regs_v2,
+	.bank_max = ARRAY_SIZE(svs_mt8188_banks),
+};
+
 static const struct svs_platform_data svs_mt8186_platform_data = {
 	.name = "mt8186-svs",
 	.banks = svs_mt8186_banks,
@@ -2746,6 +2907,9 @@ static const struct of_device_id svs_of_match[] = {
 	}, {
 		.compatible = "mediatek,mt8192-svs",
 		.data = &svs_mt8192_platform_data,
+	}, {
+		.compatible = "mediatek,mt8188-svs",
+		.data = &svs_mt8188_platform_data,
 	}, {
 		.compatible = "mediatek,mt8186-svs",
 		.data = &svs_mt8186_platform_data,
-- 
2.18.0