[PATCH 3/3] thermal: mediatek: add MT8365 thermal driver support
Markus Schneider-Pargmann
msp at baylibre.com
Mon Oct 18 08:40:01 PDT 2021
Hi Daniel,
On Sat, Oct 16, 2021 at 10:06:28PM +0200, Daniel Lezcano wrote:
> On 14/10/2021 15:56, Markus Schneider-Pargmann wrote:
> > From: Fabien Parent <fparent at baylibre.com>
> >
> > mt8365 is similar to the other SoCs supported by the driver. It has only
> > one bank and 3 sensors that can be multiplexed.
> >
> > Additionally the buffer has to be enabled and connected to AUXADC
> > similar to the V2 version but at a different register offset. That's why
> > I added three new configuration values to define the register, mask and
> > bits to be set to be able to use it for both V2 and mt8365.
> >
> > Signed-off-by: Fabien Parent <fparent at baylibre.com>
> > [Added apmixed control register logic]
> > Signed-off-by: Markus Schneider-Pargmann <msp at baylibre.com>
> > ---
> > drivers/thermal/mtk_thermal.c | 91 ++++++++++++++++++++++++++++++++---
> > 1 file changed, 85 insertions(+), 6 deletions(-)
> >
> > diff --git a/drivers/thermal/mtk_thermal.c b/drivers/thermal/mtk_thermal.c
> > index 93ee043d70da..7a75ae8231f2 100644
> > --- a/drivers/thermal/mtk_thermal.c
> > +++ b/drivers/thermal/mtk_thermal.c
> > @@ -31,6 +31,7 @@
> > #define AUXADC_CON2_V 0x010
> > #define AUXADC_DATA(channel) (0x14 + (channel) * 4)
> >
> > +#define APMIXED_SYS_TS_CON0 0x600
> > #define APMIXED_SYS_TS_CON1 0x604
> >
> > /* Thermal Controller Registers */
> > @@ -245,6 +246,17 @@ enum mtk_thermal_version {
> > /* The calibration coefficient of sensor */
> > #define MT8183_CALIBRATION 153
> >
> > +/* MT8365 */
> > +#define MT8365_TEMP_AUXADC_CHANNEL 11
> > +#define MT8365_CALIBRATION 164
> > +#define MT8365_NUM_CONTROLLER 1
> > +#define MT8365_NUM_BANKS 1
> > +#define MT8365_NUM_SENSORS 3
> > +#define MT8365_NUM_SENSORS_PER_ZONE 3
>
> You can get rid of these macros by using ARRAY_SIZE.
>
> eg.
>
> static const int mt8365_bank_data[] = {
> MT8365_TS1,
> MT8365_TS2,
> MT8365_TS3
> };
>
> ...
>
> .num_sensors = ARRAY_SIZE(mt8365_bank_data);
> ...
>
Thanks, done, I also used ARRAY_SIZE() on the other array definitions to
enforce that they have the correct size.
>
> > +#define MT8365_TS1 0
> > +#define MT8365_TS2 1
> > +#define MT8365_TS3 2
> > +
> > struct mtk_thermal;
> >
> > struct thermal_bank_cfg {
> > @@ -271,6 +283,9 @@ struct mtk_thermal_data {
> > bool need_switch_bank;
> > struct thermal_bank_cfg bank_data[MAX_NUM_ZONES];
> > enum mtk_thermal_version version;
> > + u32 apmixed_buffer_ctl_reg;
> > + u32 apmixed_buffer_ctl_mask;
> > + u32 apmixed_buffer_ctl_set;
> > };
> >
> > struct mtk_thermal {
> > @@ -386,6 +401,24 @@ static const int mt7622_mux_values[MT7622_NUM_SENSORS] = { 0, };
> > static const int mt7622_vts_index[MT7622_NUM_SENSORS] = { VTS1 };
> > static const int mt7622_tc_offset[MT7622_NUM_CONTROLLER] = { 0x0, };
> >
> > +/* MT8365 thermal sensor data */
> > +static const int mt8365_bank_data[MT8365_NUM_SENSORS] = {
> > + MT8365_TS1, MT8365_TS2, MT8365_TS3
> > +};
> > +
> > +static const int mt8365_msr[MT8365_NUM_SENSORS_PER_ZONE] = {
> > + TEMP_MSR0, TEMP_MSR1, TEMP_MSR2
> > +};
> > +
> > +static const int mt8365_adcpnp[MT8365_NUM_SENSORS_PER_ZONE] = {
> > + TEMP_ADCPNP0, TEMP_ADCPNP1, TEMP_ADCPNP2
> > +};
> > +
> > +static const int mt8365_mux_values[MT8365_NUM_SENSORS] = { 0, 1, 2 };
> > +static const int mt8365_tc_offset[MT8365_NUM_CONTROLLER] = { 0 };
> > +
> > +static const int mt8365_vts_index[MT8365_NUM_SENSORS] = { VTS1, VTS2, VTS3 };
> > +
> > /*
> > * The MT8173 thermal controller has four banks. Each bank can read up to
> > * four temperature sensors simultaneously. The MT8173 has a total of 5
> > @@ -460,6 +493,40 @@ static const struct mtk_thermal_data mt2701_thermal_data = {
> > .version = MTK_THERMAL_V1,
> > };
> >
> > +/*
> > + * The MT8365 thermal controller has one bank, which can read up to
> > + * four temperature sensors simultaneously. The MT8365 has a total of 3
> > + * temperature sensors.
> > + *
> > + * The thermal core only gets the maximum temperature of this one bank,
> > + * so the bank concept wouldn't be necessary here. However, the SVS (Smart
> > + * Voltage Scaling) unit makes its decisions based on the same bank
> > + * data.
> > + */
> > +static const struct mtk_thermal_data mt8365_thermal_data = {
> > + .auxadc_channel = MT8365_TEMP_AUXADC_CHANNEL,
> > + .num_banks = MT8365_NUM_BANKS,
> > + .num_sensors = MT8365_NUM_SENSORS,
> > + .vts_index = mt8365_vts_index,
> > + .cali_val = MT8365_CALIBRATION,
> > + .num_controller = MT8365_NUM_CONTROLLER,
> > + .controller_offset = mt8365_tc_offset,
> > + .need_switch_bank = false,
> > + .bank_data = {
> > + {
> > + .num_sensors = MT8365_NUM_SENSORS,
> > + .sensors = mt8365_bank_data
> > + },
> > + },
> > + .msr = mt8365_msr,
> > + .adcpnp = mt8365_adcpnp,
> > + .sensor_mux_values = mt8365_mux_values,
> > + .version = MTK_THERMAL_V1,
> > + .apmixed_buffer_ctl_reg = APMIXED_SYS_TS_CON0,
> > + .apmixed_buffer_ctl_mask = ~(u32)GENMASK(29, 28),
> > + .apmixed_buffer_ctl_set = 0,
> > +};
> > +
> > /*
> > * The MT2712 thermal controller has one bank, which can read up to
> > * four temperature sensors simultaneously. The MT2712 has a total of 4
> > @@ -514,6 +581,9 @@ static const struct mtk_thermal_data mt7622_thermal_data = {
> > .adcpnp = mt7622_adcpnp,
> > .sensor_mux_values = mt7622_mux_values,
> > .version = MTK_THERMAL_V2,
> > + .apmixed_buffer_ctl_reg = APMIXED_SYS_TS_CON1,
> > + .apmixed_buffer_ctl_mask = ~0x37,
> > + .apmixed_buffer_ctl_set = 0x1,
>
> Please change those literal into macros
done.
>
> > };
> >
> > /*
> > @@ -958,19 +1028,27 @@ static const struct of_device_id mtk_thermal_of_match[] = {
> > {
> > .compatible = "mediatek,mt8183-thermal",
> > .data = (void *)&mt8183_thermal_data,
> > + },
> > + {
> > + .compatible = "mediatek,mt8365-thermal",
> > + .data = (void *)&mt8365_thermal_data,
>
> Is this cast really needed ?
No, removed and created another patch to fix all other ones. Would look
weird otherwise.
>
> > }, {
> > },
> > };
> > MODULE_DEVICE_TABLE(of, mtk_thermal_of_match);
> >
> > -static void mtk_thermal_turn_on_buffer(void __iomem *apmixed_base)
> > +static void mtk_thermal_turn_on_buffer(struct mtk_thermal *mt,
> > + 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);
> > + if (!mt->conf->apmixed_buffer_ctl_reg)
> > + return;
> > +
> > + tmp = readl(apmixed_base + mt->conf->apmixed_buffer_ctl_reg);
> > + tmp &= mt->conf->apmixed_buffer_ctl_mask;
> > + tmp |= mt->conf->apmixed_buffer_ctl_set;
>
> What is the goal of these two bits operations ?
mt7622 needs to unset a few bits and set one bit in this register.
mt8365 only unsets bits. For this purpose I created a _mask field to
unset bits and a _set field to set bits.
Would you suggest a different way?
Thanks for your feedback.
Best,
Markus
>
> > + writel(tmp, apmixed_base + mt->conf->apmixed_buffer_ctl_reg);
> > udelay(200);
> > }
> >
> > @@ -1070,8 +1148,9 @@ static int mtk_thermal_probe(struct platform_device *pdev)
> > goto err_disable_clk_auxadc;
> > }
> >
> > + mtk_thermal_turn_on_buffer(mt, apmixed_base);
> > +
> > if (mt->conf->version == MTK_THERMAL_V2) {
> > - mtk_thermal_turn_on_buffer(apmixed_base);
> > mtk_thermal_release_periodic_ts(mt, auxadc_base);
> > }
> >
> >
>
>
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