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Message-ID: <f086c86e-7d7b-50c4-baf2-66022301adc7@gmail.com>
Date: Fri, 10 Jul 2020 17:23:04 +0200
From: Matthias Brugger <matthias.bgg@...il.com>
To: Henry Yen <henry.yen@...iatek.com>,
Zhang Rui <rui.zhang@...el.com>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Amit Kucheria <amit.kucheria@...durent.com>
Cc: linux-pm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
Steven Liu <steven.liu@...iatek.com>,
Michael Kao <michael.kao@...iatek.com>
Subject: Re: [PATCH v2 2/2] thermal: mediatek: add tsensor support for V2
thermal system
On 30/04/2020 11:14, Henry Yen wrote:
> This patch adds full support for ver 2 thermal system (e.g., MT7622 SoC).
> The new changes include reading calibration data, converting temperature
> and hardware initialization which are specific for version 2 system.
> Each platform decides which function to call according to its version.
>
> Fixes: 3966be3c08c3 ("thermal: mediatek: add support for MT7622 SoC")
> Signed-off-by: Henry Yen <henry.yen@...iatek.com>
Reviewed-by: Matthias Brugger <matthias.bgg@...il.com>
> ---
> drivers/thermal/mtk_thermal.c | 132 ++++++++++++++++++++++++++++++++--
> 1 file changed, 125 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/thermal/mtk_thermal.c b/drivers/thermal/mtk_thermal.c
> index 10107d9d56a8..88620f7e9890 100644
> --- a/drivers/thermal/mtk_thermal.c
> +++ b/drivers/thermal/mtk_thermal.c
> @@ -38,6 +38,7 @@
> #define TEMP_MONIDET0 0x014
> #define TEMP_MONIDET1 0x018
> #define TEMP_MSRCTL0 0x038
> +#define TEMP_MSRCTL1 0x03c
> #define TEMP_AHBPOLL 0x040
> #define TEMP_AHBTO 0x044
> #define TEMP_ADCPNP0 0x048
> @@ -133,6 +134,20 @@
> #define CALIB_BUF0_O_SLOPE_SIGN_V1(x) (((x) >> 7) & 0x1)
> #define CALIB_BUF1_ID_V1(x) (((x) >> 9) & 0x1)
>
> +/*
> + * Layout of the fuses providing the calibration data
> + * These macros could be used for MT7622.
> + */
> +#define CALIB_BUF0_ADC_OE_V2(x) (((x) >> 22) & 0x3ff)
> +#define CALIB_BUF0_ADC_GE_V2(x) (((x) >> 12) & 0x3ff)
> +#define CALIB_BUF0_DEGC_CALI_V2(x) (((x) >> 6) & 0x3f)
> +#define CALIB_BUF0_O_SLOPE_V2(x) (((x) >> 0) & 0x3f)
> +#define CALIB_BUF1_VTS_TS1_V2(x) (((x) >> 23) & 0x1ff)
> +#define CALIB_BUF1_VTS_TS2_V2(x) (((x) >> 14) & 0x1ff)
> +#define CALIB_BUF1_VTS_TSABB_V2(x) (((x) >> 5) & 0x1ff)
> +#define CALIB_BUF1_VALID_V2(x) (((x) >> 4) & 0x1)
> +#define CALIB_BUF1_O_SLOPE_SIGN_V2(x) (((x) >> 3) & 0x1)
> +
> enum {
> VTS1,
> VTS2,
> @@ -143,6 +158,11 @@ enum {
> MAX_NUM_VTS,
> };
>
> +enum mtk_thermal_version {
> + MTK_THERMAL_V1 = 1,
> + MTK_THERMAL_V2,
> +};
> +
> /* MT2701 thermal sensors */
> #define MT2701_TS1 0
> #define MT2701_TS2 1
> @@ -245,6 +265,7 @@ struct mtk_thermal_data {
> const int *controller_offset;
> bool need_switch_bank;
> struct thermal_bank_cfg bank_data[MAX_NUM_ZONES];
> + enum mtk_thermal_version version;
> };
>
> struct mtk_thermal {
> @@ -258,8 +279,10 @@ struct mtk_thermal {
>
> /* Calibration values */
> s32 adc_ge;
> + s32 adc_oe;
> s32 degc_cali;
> s32 o_slope;
> + s32 o_slope_sign;
> s32 vts[MAX_NUM_VTS];
>
> const struct mtk_thermal_data *conf;
> @@ -398,6 +421,7 @@ static const struct mtk_thermal_data mt8173_thermal_data = {
> .msr = mt8173_msr,
> .adcpnp = mt8173_adcpnp,
> .sensor_mux_values = mt8173_mux_values,
> + .version = MTK_THERMAL_V1,
> };
>
> /*
> @@ -428,6 +452,7 @@ static const struct mtk_thermal_data mt2701_thermal_data = {
> .msr = mt2701_msr,
> .adcpnp = mt2701_adcpnp,
> .sensor_mux_values = mt2701_mux_values,
> + .version = MTK_THERMAL_V1,
> };
>
> /*
> @@ -458,6 +483,7 @@ static const struct mtk_thermal_data mt2712_thermal_data = {
> .msr = mt2712_msr,
> .adcpnp = mt2712_adcpnp,
> .sensor_mux_values = mt2712_mux_values,
> + .version = MTK_THERMAL_V1,
> };
>
> /*
> @@ -482,6 +508,7 @@ static const struct mtk_thermal_data mt7622_thermal_data = {
> .msr = mt7622_msr,
> .adcpnp = mt7622_adcpnp,
> .sensor_mux_values = mt7622_mux_values,
> + .version = MTK_THERMAL_V2,
> };
>
> /*
> @@ -514,6 +541,7 @@ static const struct mtk_thermal_data mt8183_thermal_data = {
> .msr = mt8183_msr,
> .adcpnp = mt8183_adcpnp,
> .sensor_mux_values = mt8183_mux_values,
> + .version = MTK_THERMAL_V1,
> };
>
> /**
> @@ -540,6 +568,36 @@ static int raw_to_mcelsius_v1(struct mtk_thermal *mt, int sensno, s32 raw)
> return mt->degc_cali * 500 - tmp;
> }
>
> +static int raw_to_mcelsius_v2(struct mtk_thermal *mt, int sensno, s32 raw)
> +{
> + s32 format_1 = 0;
> + s32 format_2 = 0;
> + s32 g_oe = 1;
> + s32 g_gain = 1;
> + s32 g_x_roomt = 0;
> + s32 tmp = 0;
> +
> + if (raw == 0)
> + return 0;
> +
> + raw &= 0xfff;
> + g_gain = 10000 + (((mt->adc_ge - 512) * 10000) >> 12);
> + g_oe = mt->adc_oe - 512;
> + format_1 = mt->vts[VTS2] + 3105 - g_oe;
> + format_2 = (mt->degc_cali * 10) >> 1;
> + g_x_roomt = (((format_1 * 10000) >> 12) * 10000) / g_gain;
> +
> + tmp = (((((raw - g_oe) * 10000) >> 12) * 10000) / g_gain) - g_x_roomt;
> + tmp = tmp * 10 * 100 / 11;
> +
> + if (mt->o_slope_sign == 0)
> + tmp = tmp / (165 - mt->o_slope);
> + else
> + tmp = tmp / (165 + mt->o_slope);
> +
> + return (format_2 - tmp) * 100;
> +}
> +
> /**
> * mtk_thermal_get_bank - get bank
> * @bank: The bank
> @@ -594,9 +652,13 @@ static int mtk_thermal_bank_temperature(struct mtk_thermal_bank *bank)
> raw = readl(mt->thermal_base +
> conf->msr[conf->bank_data[bank->id].sensors[i]]);
>
> - temp = raw_to_mcelsius_v1(mt,
> - conf->bank_data[bank->id].sensors[i],
> - raw);
> + if (mt->conf->version == MTK_THERMAL_V1) {
> + temp = raw_to_mcelsius_v1(
> + mt, conf->bank_data[bank->id].sensors[i], raw);
> + } else {
> + temp = raw_to_mcelsius_v2(
> + mt, conf->bank_data[bank->id].sensors[i], raw);
> + }
>
> /*
> * The first read of a sensor often contains very high bogus
> @@ -698,9 +760,11 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
> writel(auxadc_phys_base + AUXADC_CON1_CLR_V,
> controller_base + TEMP_ADCMUXADDR);
>
> - /* AHB address for pnp sensor mux selection */
> - writel(apmixed_phys_base + APMIXED_SYS_TS_CON1,
> - controller_base + TEMP_PNPMUXADDR);
> + if (mt->conf->version == MTK_THERMAL_V1) {
> + /* AHB address for pnp sensor mux selection */
> + writel(apmixed_phys_base + APMIXED_SYS_TS_CON1,
> + controller_base + TEMP_PNPMUXADDR);
> + }
>
> /* AHB value for auxadc enable */
> writel(BIT(conf->auxadc_channel), controller_base + TEMP_ADCEN);
> @@ -803,6 +867,23 @@ static int mtk_thermal_extract_efuse_v1(struct mtk_thermal *mt, u32 *buf)
> return 0;
> }
>
> +static int mtk_thermal_extract_efuse_v2(struct mtk_thermal *mt, u32 *buf)
> +{
> + if (!CALIB_BUF1_VALID_V2(buf[1]))
> + return -EINVAL;
> +
> + mt->adc_oe = CALIB_BUF0_ADC_OE_V2(buf[0]);
> + mt->adc_ge = CALIB_BUF0_ADC_GE_V2(buf[0]);
> + mt->degc_cali = CALIB_BUF0_DEGC_CALI_V2(buf[0]);
> + mt->o_slope = CALIB_BUF0_O_SLOPE_V2(buf[0]);
> + mt->vts[VTS1] = CALIB_BUF1_VTS_TS1_V2(buf[1]);
> + mt->vts[VTS2] = CALIB_BUF1_VTS_TS2_V2(buf[1]);
> + mt->vts[VTSABB] = CALIB_BUF1_VTS_TSABB_V2(buf[1]);
> + mt->o_slope_sign = CALIB_BUF1_O_SLOPE_SIGN_V2(buf[1]);
> +
> + return 0;
> +}
> +
> static int mtk_thermal_get_calibration_data(struct device *dev,
> struct mtk_thermal *mt)
> {
> @@ -838,8 +919,15 @@ static int mtk_thermal_get_calibration_data(struct device *dev,
> goto out;
> }
>
> - if (mtk_thermal_extract_efuse_v1(mt, buf))
> + if (mt->conf->version == MTK_THERMAL_V1)
> + ret = mtk_thermal_extract_efuse_v1(mt, buf);
> + else
> + ret = mtk_thermal_extract_efuse_v2(mt, buf);
> +
> + if (ret) {
> dev_info(dev, "Device not calibrated, using default calibration values\n");
> + ret = 0;
> + }
>
> out:
> kfree(buf);
> @@ -872,6 +960,28 @@ static const struct of_device_id mtk_thermal_of_match[] = {
> };
> MODULE_DEVICE_TABLE(of, mtk_thermal_of_match);
>
> +static void mtk_thermal_turn_on_buffer(void __iomem *apmixed_base)
> +{
> + int tmp;
> +
> + tmp = readl(apmixed_base + APMIXED_SYS_TS_CON1);
> + tmp &= ~(0x37);
> + tmp |= 0x1;
> + writel(tmp, apmixed_base + APMIXED_SYS_TS_CON1);
> + udelay(200);
> +}
> +
> +static void mtk_thermal_release_periodic_ts(struct mtk_thermal *mt,
> + void __iomem *auxadc_base)
> +{
> + int tmp;
> +
> + writel(0x800, auxadc_base + AUXADC_CON1_SET_V);
> + writel(0x1, mt->thermal_base + TEMP_MONCTL0);
> + tmp = readl(mt->thermal_base + TEMP_MSRCTL1);
> + writel((tmp & (~0x10e)), mt->thermal_base + TEMP_MSRCTL1);
> +}
> +
> static int mtk_thermal_probe(struct platform_device *pdev)
> {
> int ret, i, ctrl_id;
> @@ -880,6 +990,7 @@ static int mtk_thermal_probe(struct platform_device *pdev)
> struct resource *res;
> u64 auxadc_phys_base, apmixed_phys_base;
> struct thermal_zone_device *tzdev;
> + void __iomem *apmixed_base, *auxadc_base;
>
> mt = devm_kzalloc(&pdev->dev, sizeof(*mt), GFP_KERNEL);
> if (!mt)
> @@ -914,6 +1025,7 @@ static int mtk_thermal_probe(struct platform_device *pdev)
> return -ENODEV;
> }
>
> + auxadc_base = of_iomap(auxadc, 0);
> auxadc_phys_base = of_get_phys_base(auxadc);
>
> of_node_put(auxadc);
> @@ -929,6 +1041,7 @@ static int mtk_thermal_probe(struct platform_device *pdev)
> return -ENODEV;
> }
>
> + apmixed_base = of_iomap(apmixedsys, 0);
> apmixed_phys_base = of_get_phys_base(apmixedsys);
>
> of_node_put(apmixedsys);
> @@ -954,6 +1067,11 @@ static int mtk_thermal_probe(struct platform_device *pdev)
> goto err_disable_clk_auxadc;
> }
>
> + if (mt->conf->version == MTK_THERMAL_V2) {
> + mtk_thermal_turn_on_buffer(apmixed_base);
> + mtk_thermal_release_periodic_ts(mt, auxadc_base);
> + }
> +
> for (ctrl_id = 0; ctrl_id < mt->conf->num_controller ; ctrl_id++)
> for (i = 0; i < mt->conf->num_banks; i++)
> mtk_thermal_init_bank(mt, i, apmixed_phys_base,
>
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