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[42.72.220.172]) by smtp.gmail.com with ESMTPSA id c1-20020a63d501000000b003c14af50631sm10216519pgg.73.2022.05.31.03.29.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 31 May 2022 03:29:48 -0700 (PDT) From: ChiaEn Wu To: lee.jones@linaro.org, daniel.thompson@linaro.org, jingoohan1@gmail.com, pavel@ucw.cz, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, matthias.bgg@gmail.com, sre@kernel.org, chunfeng.yun@mediatek.com, gregkh@linuxfoundation.org, jic23@kernel.org, lars@metafoo.de, lgirdwood@gmail.com, broonie@kernel.org, linux@roeck-us.net, heikki.krogerus@linux.intel.com, deller@gmx.de Cc: cy_huang@richtek.com, alice_chen@richtek.com, chiaen_wu@richtek.com, dri-devel@lists.freedesktop.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, linux-usb@vger.kernel.org, linux-iio@vger.kernel.org, linux-fbdev@vger.kernel.org Subject: [PATCH 04/14] iio: adc: mt6370: Add Mediatek MT6370 support Date: Tue, 31 May 2022 18:27:59 +0800 Message-Id: <20220531102809.11976-5-peterwu.pub@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220531102809.11976-1-peterwu.pub@gmail.com> References: <20220531102809.11976-1-peterwu.pub@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org From: ChiaEn Wu Add Mediatek MT6370 ADC support. Signed-off-by: ChiaEn Wu --- drivers/iio/adc/Kconfig | 9 ++ drivers/iio/adc/Makefile | 1 + drivers/iio/adc/mt6370-adc.c | 257 +++++++++++++++++++++++++++++++++++ 3 files changed, 267 insertions(+) create mode 100644 drivers/iio/adc/mt6370-adc.c diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 71ab0a06aa82..d7932dd9b773 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -737,6 +737,15 @@ config MEDIATEK_MT6360_ADC is used in smartphones and tablets and supports a 11 channel general purpose ADC. +config MEDIATEK_MT6370_ADC + tristate "Mediatek MT6370 ADC driver" + depends on MFD_MT6370 + help + Say Y here to enable MT6370 ADC support. + Integrated for System Monitoring includes + is used in smartphones and tablets and supports a 9 channel + general purpose ADC. + config MEDIATEK_MT6577_AUXADC tristate "MediaTek AUXADC driver" depends on ARCH_MEDIATEK || COMPILE_TEST diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile index 39d806f6d457..0ce285c7e2d0 100644 --- a/drivers/iio/adc/Makefile +++ b/drivers/iio/adc/Makefile @@ -68,6 +68,7 @@ obj-$(CONFIG_MCP320X) += mcp320x.o obj-$(CONFIG_MCP3422) += mcp3422.o obj-$(CONFIG_MCP3911) += mcp3911.o obj-$(CONFIG_MEDIATEK_MT6360_ADC) += mt6360-adc.o +obj-$(CONFIG_MEDIATEK_MT6370_ADC) += mt6370-adc.o obj-$(CONFIG_MEDIATEK_MT6577_AUXADC) += mt6577_auxadc.o obj-$(CONFIG_MEN_Z188_ADC) += men_z188_adc.o obj-$(CONFIG_MESON_SARADC) += meson_saradc.o diff --git a/drivers/iio/adc/mt6370-adc.c b/drivers/iio/adc/mt6370-adc.c new file mode 100644 index 000000000000..3320ebca17ad --- /dev/null +++ b/drivers/iio/adc/mt6370-adc.c @@ -0,0 +1,257 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define MT6370_REG_CHG_CTRL3 0x113 /* AICR */ +#define MT6370_REG_CHG_CTRL7 0x117 /* ICHG */ +#define MT6370_REG_CHG_ADC 0x121 +#define MT6370_REG_ADC_DATA_H 0x14C + +#define MT6370_ADC_START_MASK BIT(0) +#define MT6370_ADC_IN_SEL_MASK GENMASK(7, 4) +#define MT6370_AICR_ICHG_MASK GENMASK(7, 2) + +#define MT6370_ADC_CHAN_SHIFT 4 + +#define MT6370_AICR_400MA 0x6 +#define MT6370_ICHG_500MA 0x4 +#define MT6370_ICHG_900MA 0x8 + +#define ADC_CONV_TIME_US 35000 +#define ADC_CONV_POLLING_TIME 1000 + +struct mt6370_adc_data { + struct device *dev; + struct regmap *regmap; + struct mutex lock; +}; + +static int mt6370_adc_read_channel(struct mt6370_adc_data *priv, int chan, + unsigned long addr, int *val) +{ + __be16 be_val; + unsigned int reg_val; + int ret; + + mutex_lock(&priv->lock); + + reg_val = MT6370_ADC_START_MASK | (addr << MT6370_ADC_CHAN_SHIFT); + ret = regmap_write(priv->regmap, MT6370_REG_CHG_ADC, reg_val); + if (ret) + goto adc_unlock; + + msleep(ADC_CONV_TIME_US / 1000); + + ret = regmap_read_poll_timeout(priv->regmap, + MT6370_REG_CHG_ADC, reg_val, + !(reg_val & MT6370_ADC_START_MASK), + ADC_CONV_POLLING_TIME, + ADC_CONV_TIME_US * 3); + if (ret) { + if (ret == -ETIMEDOUT) + dev_err(priv->dev, "Failed to wait adc conversion\n"); + goto adc_unlock; + } + + ret = regmap_raw_read(priv->regmap, MT6370_REG_ADC_DATA_H, + &be_val, sizeof(be_val)); + if (ret) + goto adc_unlock; + + *val = be16_to_cpu(be_val); + ret = IIO_VAL_INT; + +adc_unlock: + mutex_unlock(&priv->lock); + + return ret; +} + +static int mt6370_adc_read_scale(struct mt6370_adc_data *priv, + int chan, int *val1, int *val2) +{ + unsigned int reg_val; + int ret; + + switch (chan) { + case MT6370_CHAN_VBAT: + case MT6370_CHAN_VSYS: + case MT6370_CHAN_CHG_VDDP: + *val1 = 5000; + return IIO_VAL_INT; + case MT6370_CHAN_IBUS: + ret = regmap_read(priv->regmap, MT6370_REG_CHG_CTRL3, ®_val); + if (ret) + return ret; + + reg_val = FIELD_GET(MT6370_AICR_ICHG_MASK, reg_val); + if (reg_val < MT6370_AICR_400MA) + *val1 = 33500; + else + *val1 = 50000; + + return IIO_VAL_INT; + case MT6370_CHAN_IBAT: + ret = regmap_read(priv->regmap, MT6370_REG_CHG_CTRL7, ®_val); + if (ret) + return ret; + + reg_val = FIELD_GET(MT6370_AICR_ICHG_MASK, reg_val); + if (reg_val < MT6370_ICHG_500MA) + *val1 = 23750; + else if (reg_val >= MT6370_ICHG_500MA && + reg_val < MT6370_ICHG_900MA) + *val1 = 26800; + else + *val1 = 50000; + + return IIO_VAL_INT; + case MT6370_CHAN_VBUSDIV5: + *val1 = 25000; + return IIO_VAL_INT; + case MT6370_CHAN_VBUSDIV2: + *val1 = 50000; + return IIO_VAL_INT; + case MT6370_CHAN_TS_BAT: + *val1 = 25; + *val2 = 10000; + return IIO_VAL_FRACTIONAL; + case MT6370_CHAN_TEMP_JC: + *val1 = 2; + return IIO_VAL_INT; + } + + return -EINVAL; +} + +static int mt6370_adc_read_offset(struct mt6370_adc_data *priv, + int chan, int *val) +{ + *val = (chan == MT6370_CHAN_TEMP_JC) ? -20 : 0; + return IIO_VAL_INT; +} + +static int mt6370_adc_read_raw(struct iio_dev *iio_dev, + const struct iio_chan_spec *chan, + int *val, int *val2, long mask) +{ + struct mt6370_adc_data *priv = iio_priv(iio_dev); + + switch (mask) { + case IIO_CHAN_INFO_RAW: + return mt6370_adc_read_channel(priv, chan->channel, + chan->address, val); + case IIO_CHAN_INFO_SCALE: + return mt6370_adc_read_scale(priv, chan->channel, val, val2); + case IIO_CHAN_INFO_OFFSET: + return mt6370_adc_read_offset(priv, chan->channel, val); + } + + return -EINVAL; +} + +static const char * const mt6370_channel_labels[MT6370_CHAN_MAX] = { + "vbusdiv5", "vbusdiv2", "vsys", "vbat", + "ts_bat", "ibus", "ibat", "chg_vddp", + "temp_jc", +}; + +static int mt6370_adc_read_label(struct iio_dev *iio_dev, + struct iio_chan_spec const *chan, char *label) +{ + return snprintf(label, PAGE_SIZE, "%s\n", + mt6370_channel_labels[chan->channel]); +} + +static const struct iio_info mt6370_adc_iio_info = { + .read_raw = mt6370_adc_read_raw, + .read_label = mt6370_adc_read_label, +}; + +#define MT6370_ADC_CHAN(_idx, _type, _addr) { \ + .type = _type, \ + .channel = MT6370_CHAN_##_idx, \ + .address = _addr, \ + .scan_index = MT6370_CHAN_##_idx, \ + .indexed = 1, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ + BIT(IIO_CHAN_INFO_SCALE) | \ + BIT(IIO_CHAN_INFO_OFFSET), \ +} + +static const struct iio_chan_spec mt6370_adc_channels[] = { + MT6370_ADC_CHAN(VBUSDIV5, IIO_VOLTAGE, 1), + MT6370_ADC_CHAN(VBUSDIV2, IIO_VOLTAGE, 2), + MT6370_ADC_CHAN(VSYS, IIO_VOLTAGE, 3), + MT6370_ADC_CHAN(VBAT, IIO_VOLTAGE, 4), + MT6370_ADC_CHAN(TS_BAT, IIO_VOLTAGE, 6), + MT6370_ADC_CHAN(IBUS, IIO_CURRENT, 8), + MT6370_ADC_CHAN(IBAT, IIO_CURRENT, 9), + MT6370_ADC_CHAN(CHG_VDDP, IIO_VOLTAGE, 11), + MT6370_ADC_CHAN(TEMP_JC, IIO_TEMP, 12), +}; + +static int mt6370_adc_probe(struct platform_device *pdev) +{ + int ret; + struct mt6370_adc_data *priv; + struct regmap *regmap; + struct iio_dev *indio_dev; + + regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!regmap) { + dev_err(&pdev->dev, "Failed to get regmap\n"); + return -ENODEV; + } + + indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*priv)); + if (!indio_dev) + return -ENOMEM; + + priv = iio_priv(indio_dev); + priv->dev = &pdev->dev; + priv->regmap = regmap; + mutex_init(&priv->lock); + + ret = regmap_write(priv->regmap, MT6370_REG_CHG_ADC, 0); + if (ret) { + dev_err(&pdev->dev, "Failed to reset adc\n"); + return ret; + } + + indio_dev->name = dev_name(&pdev->dev); + indio_dev->info = &mt6370_adc_iio_info; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = mt6370_adc_channels; + indio_dev->num_channels = ARRAY_SIZE(mt6370_adc_channels); + + return devm_iio_device_register(&pdev->dev, indio_dev); +} + +static const struct of_device_id mt6370_adc_of_id[] = { + { .compatible = "mediatek,mt6370-adc", }, + {} +}; +MODULE_DEVICE_TABLE(of, mt6370_adc_of_id); + +static struct platform_driver mt6370_adc_driver = { + .driver = { + .name = "mt6370-adc", + .of_match_table = mt6370_adc_of_id, + }, + .probe = mt6370_adc_probe, +}; +module_platform_driver(mt6370_adc_driver); + +MODULE_AUTHOR("ChiaEn Wu "); +MODULE_DESCRIPTION("MT6370 ADC Drvier"); +MODULE_LICENSE("GPL v2");