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[92.40.169.177]) by smtp.gmail.com with ESMTPSA id s19-20020a056402521300b0042617ba637bsm6823652edd.5.2022.06.18.14.40.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 18 Jun 2022 14:40:12 -0700 (PDT) From: Aidan MacDonald To: linus.walleij@linaro.org, brgl@bgdev.pl, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, wens@csie.org, jic23@kernel.org, lee.jones@linaro.org, sre@kernel.org, broonie@kernel.org, gregkh@linuxfoundation.org, lgirdwood@gmail.com Cc: lars@metafoo.de, rafael@kernel.org, quic_gurus@quicinc.com, sebastian.reichel@collabora.com, andy.shevchenko@gmail.com, michael@walle.cc, linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, linux-pm@vger.kernel.org Subject: [PATCH v3 11/16] iio: adc: axp20x_adc: Add support for AXP192 Date: Sat, 18 Jun 2022 22:40:04 +0100 Message-Id: <20220618214009.2178567-12-aidanmacdonald.0x0@gmail.com> In-Reply-To: <20220618214009.2178567-1-aidanmacdonald.0x0@gmail.com> References: <20220618214009.2178567-1-aidanmacdonald.0x0@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_ENVFROM_END_DIGIT, FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The AXP192 is identical to the AXP20x, except for the addition of two more GPIO ADC channels. Signed-off-by: Aidan MacDonald --- drivers/iio/adc/axp20x_adc.c | 298 +++++++++++++++++++++++++++++++++-- 1 file changed, 289 insertions(+), 9 deletions(-) diff --git a/drivers/iio/adc/axp20x_adc.c b/drivers/iio/adc/axp20x_adc.c index 041511280e1e..929aa14f9cf3 100644 --- a/drivers/iio/adc/axp20x_adc.c +++ b/drivers/iio/adc/axp20x_adc.c @@ -22,11 +22,19 @@ #include #include +#define AXP192_ADC_EN1_MASK GENMASK(7, 0) +#define AXP192_ADC_EN2_MASK (GENMASK(3, 0) | BIT(7)) + #define AXP20X_ADC_EN1_MASK GENMASK(7, 0) #define AXP20X_ADC_EN2_MASK (GENMASK(3, 2) | BIT(7)) #define AXP22X_ADC_EN1_MASK (GENMASK(7, 5) | BIT(0)) +#define AXP192_GPIO30_IN_RANGE_GPIO0 BIT(0) +#define AXP192_GPIO30_IN_RANGE_GPIO1 BIT(1) +#define AXP192_GPIO30_IN_RANGE_GPIO2 BIT(2) +#define AXP192_GPIO30_IN_RANGE_GPIO3 BIT(3) + #define AXP20X_GPIO10_IN_RANGE_GPIO0 BIT(0) #define AXP20X_GPIO10_IN_RANGE_GPIO1 BIT(1) @@ -71,6 +79,25 @@ struct axp20x_adc_iio { const struct axp_data *data; }; +enum axp192_adc_channel_v { + AXP192_ACIN_V = 0, + AXP192_VBUS_V, + AXP192_TS_IN, + AXP192_GPIO0_V, + AXP192_GPIO1_V, + AXP192_GPIO2_V, + AXP192_GPIO3_V, + AXP192_IPSOUT_V, + AXP192_BATT_V, +}; + +enum axp192_adc_channel_i { + AXP192_ACIN_I = 0, + AXP192_VBUS_I, + AXP192_BATT_CHRG_I, + AXP192_BATT_DISCHRG_I, +}; + enum axp20x_adc_channel_v { AXP20X_ACIN_V = 0, AXP20X_VBUS_V, @@ -158,6 +185,43 @@ static struct iio_map axp22x_maps[] = { * The only exception is for the battery. batt_v will be in_voltage6_raw and * charge current in_current6_raw and discharge current will be in_current7_raw. */ +static const struct iio_chan_spec axp192_adc_channels[] = { + AXP20X_ADC_CHANNEL(AXP192_ACIN_V, "acin_v", IIO_VOLTAGE, + AXP20X_ACIN_V_ADC_H), + AXP20X_ADC_CHANNEL(AXP192_ACIN_I, "acin_i", IIO_CURRENT, + AXP20X_ACIN_I_ADC_H), + AXP20X_ADC_CHANNEL(AXP192_VBUS_V, "vbus_v", IIO_VOLTAGE, + AXP20X_VBUS_V_ADC_H), + AXP20X_ADC_CHANNEL(AXP192_VBUS_I, "vbus_i", IIO_CURRENT, + AXP20X_VBUS_I_ADC_H), + { + .type = IIO_TEMP, + .address = AXP20X_TEMP_ADC_H, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | + BIT(IIO_CHAN_INFO_OFFSET), + .datasheet_name = "pmic_temp", + }, + AXP20X_ADC_CHANNEL_OFFSET(AXP192_GPIO0_V, "gpio0_v", IIO_VOLTAGE, + AXP20X_GPIO0_V_ADC_H), + AXP20X_ADC_CHANNEL_OFFSET(AXP192_GPIO1_V, "gpio1_v", IIO_VOLTAGE, + AXP20X_GPIO1_V_ADC_H), + AXP20X_ADC_CHANNEL_OFFSET(AXP192_GPIO2_V, "gpio2_v", IIO_VOLTAGE, + AXP192_GPIO2_V_ADC_H), + AXP20X_ADC_CHANNEL_OFFSET(AXP192_GPIO3_V, "gpio3_v", IIO_VOLTAGE, + AXP192_GPIO3_V_ADC_H), + AXP20X_ADC_CHANNEL(AXP192_IPSOUT_V, "ipsout_v", IIO_VOLTAGE, + AXP20X_IPSOUT_V_HIGH_H), + AXP20X_ADC_CHANNEL(AXP192_BATT_V, "batt_v", IIO_VOLTAGE, + AXP20X_BATT_V_H), + AXP20X_ADC_CHANNEL(AXP192_BATT_CHRG_I, "batt_chrg_i", IIO_CURRENT, + AXP20X_BATT_CHRG_I_H), + AXP20X_ADC_CHANNEL(AXP192_BATT_DISCHRG_I, "batt_dischrg_i", IIO_CURRENT, + AXP20X_BATT_DISCHRG_I_H), + AXP20X_ADC_CHANNEL(AXP192_TS_IN, "ts_v", IIO_VOLTAGE, + AXP20X_TS_IN_H), +}; + static const struct iio_chan_spec axp20x_adc_channels[] = { AXP20X_ADC_CHANNEL(AXP20X_ACIN_V, "acin_v", IIO_VOLTAGE, AXP20X_ACIN_V_ADC_H), @@ -231,6 +295,27 @@ static const struct iio_chan_spec axp813_adc_channels[] = { AXP288_TS_ADC_H), }; +static int axp192_adc_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val) +{ + struct axp20x_adc_iio *info = iio_priv(indio_dev); + int ret, size; + + if (chan->type == IIO_CURRENT && + (chan->channel == AXP192_BATT_CHRG_I || + chan->channel == AXP192_BATT_DISCHRG_I)) + size = 13; + else + size = 12; + + ret = axp20x_read_variable_width(info->regmap, chan->address, size); + if (ret < 0) + return ret; + + *val = ret; + return IIO_VAL_INT; +} + static int axp20x_adc_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val) { @@ -283,6 +368,44 @@ static int axp813_adc_raw(struct iio_dev *indio_dev, return IIO_VAL_INT; } +static int axp192_adc_scale_voltage(int channel, int *val, int *val2) +{ + switch (channel) { + case AXP192_ACIN_V: + case AXP192_VBUS_V: + *val = 1; + *val2 = 700000; + return IIO_VAL_INT_PLUS_MICRO; + + case AXP192_GPIO0_V: + case AXP192_GPIO1_V: + case AXP192_GPIO2_V: + case AXP192_GPIO3_V: + *val = 0; + *val2 = 500000; + return IIO_VAL_INT_PLUS_MICRO; + + case AXP192_BATT_V: + *val = 1; + *val2 = 100000; + return IIO_VAL_INT_PLUS_MICRO; + + case AXP192_IPSOUT_V: + *val = 1; + *val2 = 400000; + return IIO_VAL_INT_PLUS_MICRO; + + case AXP192_TS_IN: + /* 0.8 mV per LSB */ + *val = 0; + *val2 = 800000; + return IIO_VAL_INT_PLUS_MICRO; + + default: + return -EINVAL; + } +} + static int axp20x_adc_scale_voltage(int channel, int *val, int *val2) { switch (channel) { @@ -386,6 +509,29 @@ static int axp20x_adc_scale_current(int channel, int *val, int *val2) } } +static int axp192_adc_scale(struct iio_chan_spec const *chan, int *val, + int *val2) +{ + switch (chan->type) { + case IIO_VOLTAGE: + return axp192_adc_scale_voltage(chan->channel, val, val2); + + case IIO_CURRENT: + /* + * AXP192 current channels are identical to the AXP20x, + * therefore we can re-use the scaling function. + */ + return axp20x_adc_scale_current(chan->channel, val, val2); + + case IIO_TEMP: + *val = 100; + return IIO_VAL_INT; + + default: + return -EINVAL; + } +} + static int axp20x_adc_scale(struct iio_chan_spec const *chan, int *val, int *val2) { @@ -445,6 +591,42 @@ static int axp813_adc_scale(struct iio_chan_spec const *chan, int *val, } } +static int axp192_adc_offset_voltage(struct iio_dev *indio_dev, int channel, + int *val) +{ + struct axp20x_adc_iio *info = iio_priv(indio_dev); + unsigned int regval; + int ret; + + ret = regmap_read(info->regmap, AXP192_GPIO30_IN_RANGE, ®val); + if (ret < 0) + return ret; + + switch (channel) { + case AXP192_GPIO0_V: + regval = FIELD_GET(AXP192_GPIO30_IN_RANGE_GPIO0, regval); + break; + + case AXP192_GPIO1_V: + regval = FIELD_GET(AXP192_GPIO30_IN_RANGE_GPIO1, regval); + break; + + case AXP192_GPIO2_V: + regval = FIELD_GET(AXP192_GPIO30_IN_RANGE_GPIO2, regval); + break; + + case AXP192_GPIO3_V: + regval = FIELD_GET(AXP192_GPIO30_IN_RANGE_GPIO3, regval); + break; + + default: + return -EINVAL; + } + + *val = regval ? 700000 : 0; + return IIO_VAL_INT; +} + static int axp20x_adc_offset_voltage(struct iio_dev *indio_dev, int channel, int *val) { @@ -473,6 +655,22 @@ static int axp20x_adc_offset_voltage(struct iio_dev *indio_dev, int channel, return IIO_VAL_INT; } +static int axp192_adc_offset(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val) +{ + switch (chan->type) { + case IIO_VOLTAGE: + return axp192_adc_offset_voltage(indio_dev, chan->channel, val); + + case IIO_TEMP: + *val = -1447; + return IIO_VAL_INT; + + default: + return -EINVAL; + } +} + static int axp20x_adc_offset(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val) { @@ -489,6 +687,25 @@ static int axp20x_adc_offset(struct iio_dev *indio_dev, } } +static int axp192_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, + int *val2, long mask) +{ + switch (mask) { + case IIO_CHAN_INFO_OFFSET: + return axp192_adc_offset(indio_dev, chan, val); + + case IIO_CHAN_INFO_SCALE: + return axp192_adc_scale(chan, val, val2); + + case IIO_CHAN_INFO_RAW: + return axp192_adc_raw(indio_dev, chan, val); + + default: + return -EINVAL; + } +} + static int axp20x_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) @@ -549,6 +766,53 @@ static int axp813_read_raw(struct iio_dev *indio_dev, } } +static int axp192_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, int val2, + long mask) +{ + struct axp20x_adc_iio *info = iio_priv(indio_dev); + unsigned int regmask, regval; + + /* + * The AXP192 PMIC allows the user to choose between 0V and 0.7V offsets + * for (independently) GPIO0-3 when in ADC mode. + */ + if (mask != IIO_CHAN_INFO_OFFSET) + return -EINVAL; + + if (val != 0 && val != 700000) + return -EINVAL; + + regval = val ? 1 : 0; + + switch (chan->channel) { + case AXP192_GPIO0_V: + regmask = AXP192_GPIO30_IN_RANGE_GPIO0; + regval = FIELD_PREP(AXP192_GPIO30_IN_RANGE_GPIO0, regval); + break; + + case AXP192_GPIO1_V: + regmask = AXP192_GPIO30_IN_RANGE_GPIO1; + regval = FIELD_PREP(AXP192_GPIO30_IN_RANGE_GPIO1, regval); + break; + + case AXP192_GPIO2_V: + regmask = AXP192_GPIO30_IN_RANGE_GPIO2; + regval = FIELD_PREP(AXP192_GPIO30_IN_RANGE_GPIO2, regval); + break; + + case AXP192_GPIO3_V: + regmask = AXP192_GPIO30_IN_RANGE_GPIO3; + regval = FIELD_PREP(AXP192_GPIO30_IN_RANGE_GPIO3, regval); + break; + + default: + return -EINVAL; + } + + return regmap_update_bits(info->regmap, AXP192_GPIO30_IN_RANGE, regmask, regval); +} + static int axp20x_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) @@ -586,6 +850,11 @@ static int axp20x_write_raw(struct iio_dev *indio_dev, return regmap_update_bits(info->regmap, AXP20X_GPIO10_IN_RANGE, regmask, regval); } +static const struct iio_info axp192_adc_iio_info = { + .read_raw = axp192_read_raw, + .write_raw = axp192_write_raw, +}; + static const struct iio_info axp20x_adc_iio_info = { .read_raw = axp20x_read_raw, .write_raw = axp20x_write_raw, @@ -625,19 +894,29 @@ struct axp_data { int num_channels; struct iio_chan_spec const *channels; unsigned long adc_en1_mask; + unsigned long adc_en2_mask; int (*adc_rate)(struct axp20x_adc_iio *info, int rate); - bool adc_en2; struct iio_map *maps; }; +static const struct axp_data axp192_data = { + .iio_info = &axp192_adc_iio_info, + .num_channels = ARRAY_SIZE(axp192_adc_channels), + .channels = axp192_adc_channels, + .adc_en1_mask = AXP192_ADC_EN1_MASK, + .adc_en2_mask = AXP192_ADC_EN2_MASK, + .adc_rate = axp20x_adc_rate, + .maps = axp20x_maps, +}; + static const struct axp_data axp20x_data = { .iio_info = &axp20x_adc_iio_info, .num_channels = ARRAY_SIZE(axp20x_adc_channels), .channels = axp20x_adc_channels, .adc_en1_mask = AXP20X_ADC_EN1_MASK, + .adc_en2_mask = AXP20X_ADC_EN2_MASK, .adc_rate = axp20x_adc_rate, - .adc_en2 = true, .maps = axp20x_maps, }; @@ -647,7 +926,6 @@ static const struct axp_data axp22x_data = { .channels = axp22x_adc_channels, .adc_en1_mask = AXP22X_ADC_EN1_MASK, .adc_rate = axp22x_adc_rate, - .adc_en2 = false, .maps = axp22x_maps, }; @@ -657,11 +935,11 @@ static const struct axp_data axp813_data = { .channels = axp813_adc_channels, .adc_en1_mask = AXP22X_ADC_EN1_MASK, .adc_rate = axp813_adc_rate, - .adc_en2 = false, .maps = axp22x_maps, }; static const struct of_device_id axp20x_adc_of_match[] = { + { .compatible = "x-powers,axp192-adc", .data = (void *)&axp192_data, }, { .compatible = "x-powers,axp209-adc", .data = (void *)&axp20x_data, }, { .compatible = "x-powers,axp221-adc", .data = (void *)&axp22x_data, }, { .compatible = "x-powers,axp813-adc", .data = (void *)&axp813_data, }, @@ -670,6 +948,7 @@ static const struct of_device_id axp20x_adc_of_match[] = { MODULE_DEVICE_TABLE(of, axp20x_adc_of_match); static const struct platform_device_id axp20x_adc_id_match[] = { + { .name = "axp192-adc", .driver_data = (kernel_ulong_t)&axp192_data, }, { .name = "axp20x-adc", .driver_data = (kernel_ulong_t)&axp20x_data, }, { .name = "axp22x-adc", .driver_data = (kernel_ulong_t)&axp22x_data, }, { .name = "axp813-adc", .driver_data = (kernel_ulong_t)&axp813_data, }, @@ -715,10 +994,11 @@ static int axp20x_probe(struct platform_device *pdev) /* Enable the ADCs on IP */ regmap_write(info->regmap, AXP20X_ADC_EN1, info->data->adc_en1_mask); - if (info->data->adc_en2) - /* Enable GPIO0/1 and internal temperature ADCs */ + if (info->data->adc_en2_mask) + /* Enable GPIO and internal temperature ADCs */ regmap_update_bits(info->regmap, AXP20X_ADC_EN2, - AXP20X_ADC_EN2_MASK, AXP20X_ADC_EN2_MASK); + info->data->adc_en2_mask, + info->data->adc_en2_mask); /* Configure ADCs rate */ info->data->adc_rate(info, 100); @@ -743,7 +1023,7 @@ static int axp20x_probe(struct platform_device *pdev) fail_map: regmap_write(info->regmap, AXP20X_ADC_EN1, 0); - if (info->data->adc_en2) + if (info->data->adc_en2_mask) regmap_write(info->regmap, AXP20X_ADC_EN2, 0); return ret; @@ -759,7 +1039,7 @@ static int axp20x_remove(struct platform_device *pdev) regmap_write(info->regmap, AXP20X_ADC_EN1, 0); - if (info->data->adc_en2) + if (info->data->adc_en2_mask) regmap_write(info->regmap, AXP20X_ADC_EN2, 0); return 0; -- 2.35.1