From patchwork Fri Jun 23 02:20:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: George Stark X-Patchwork-Id: 13289950 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 95955EB64DA for ; Fri, 23 Jun 2023 02:24:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=LzcDjj23yngxqxihwoRdnps5EQ8rl8w8LrtVZtNvSkw=; b=3oXdhZv+cG6QU2 9lvRWx0XCjB1cV3fRBXoMGlnQVhJnecnpKSO8pkAOeorqEMez6IuWnhWk8Jd0IGxmAHmprX+fVZZD 5ohPz5dkEk6ok8cBSE93XGADSwfy8JidbcILXts5KFj1+QXAx0y0AKEFxlgoeeI0h0DtIi4jYRnIq X0ArFenndMycEcMbCbJwCfSWQ6E0rSp365jJpijSiVSgcHmRVihwX1+wK23Q979uthV9/dBrU9gx6 xWupOChjuajMreSM9TBYYEhIn0DTpQYaA7maySBw/+Zlw0dC4DgHfVvUSGdP45TvHkAU7fn1NePUX Ie2hl1krB/roDAxRO3fw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qCWTG-002K5m-2V; Fri, 23 Jun 2023 02:24:22 +0000 Received: from mx.sberdevices.ru ([45.89.227.171]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qCWSw-002Jt3-1q; Fri, 23 Jun 2023 02:24:04 +0000 Received: from s-lin-edge02.sberdevices.ru (localhost [127.0.0.1]) by mx.sberdevices.ru (Postfix) with ESMTP id CC5655FD8F; Fri, 23 Jun 2023 05:23:54 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sberdevices.ru; s=mail; t=1687487034; bh=kqNz9q85odOrDuiiTt1JEkfAd/EMGs7Y5SX22XNQeEE=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type; b=T39Jxks6azD91PZBhbkGc1NRepOEgTuS1Elqw6BHEExneu+lrGYZsXG2KIhgrdR1s qJU2/0uKFkHnCXw6cTC4aH7MzCltyBbjhl48/FJ0+SihFJlq1rMvuBu//8pzZjpUVe nvK7nQDr7ySW1ao5hJe8JkL0bW7cA3Wum7ENfunSXuL1fMJiEE5jEtS/5JEP6rvSPg fkCeOQ0htuogBhUDJZ5OhevrKV2zBmAUwc34R8DuNKDKPiTvyyWO9mrF5JBe+m3BBJ 3q5NNsGZuOxmKlp4xX8jSHwcZPD1z8WMLE28i1oDMZbF3N9bYDZTajVxzkofbdmQZs dcc9GUDkPiYTw== Received: from p-i-exch-sc-m01.sberdevices.ru (p-i-exch-sc-m01.sberdevices.ru [172.16.192.107]) by mx.sberdevices.ru (Postfix) with ESMTP; Fri, 23 Jun 2023 05:23:54 +0300 (MSK) From: George Stark To: , , , , , , , , CC: , , , , , George Stark Subject: [PATCH v2 6/6] meson saradc: support reading from channel7 mux inputs Date: Fri, 23 Jun 2023 05:20:14 +0300 Message-ID: <20230623022334.791026-7-gnstark@sberdevices.ru> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230623022334.791026-1-gnstark@sberdevices.ru> References: <20230623022334.791026-1-gnstark@sberdevices.ru> MIME-Version: 1.0 X-Originating-IP: [100.64.160.123] X-ClientProxiedBy: p-i-exch-sc-m01.sberdevices.ru (172.16.192.107) To p-i-exch-sc-m01.sberdevices.ru (172.16.192.107) X-KSMG-Rule-ID: 4 X-KSMG-Message-Action: clean X-KSMG-AntiSpam-Status: not scanned, disabled by settings X-KSMG-AntiSpam-Interceptor-Info: not scanned X-KSMG-AntiPhishing: not scanned, disabled by settings X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 1.1.2.30, bases: 2023/06/22 21:10:00 #21557945 X-KSMG-AntiVirus-Status: Clean, skipped X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230622_192402_978245_3516BCC0 X-CRM114-Status: GOOD ( 14.56 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add iio channel for every channel 7 muxer input. Meson saradc channel 7 is connected to muxer that can switch channel input to well-known sources like Vdd, GND and several Vdd dividers. Signed-off-by: George Stark --- Changelog: v1->v2: update commit message from [1] [1] https://lore.kernel.org/lkml/20230621062715.455652-4-gnstark@sberdevices.ru/ --- drivers/iio/adc/meson_saradc.c | 65 +++++++++++++++++++++++++++++++--- 1 file changed, 61 insertions(+), 4 deletions(-) diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c index e7eb154b151f..ecaebb569e8e 100644 --- a/drivers/iio/adc/meson_saradc.c +++ b/drivers/iio/adc/meson_saradc.c @@ -163,6 +163,7 @@ #define MESON_SAR_ADC_MAX_FIFO_SIZE 32 #define MESON_SAR_ADC_TIMEOUT 100 /* ms */ #define MESON_SAR_ADC_VOLTAGE_AND_TEMP_CHANNEL 6 +#define MESON_SAR_ADC_VOLTAGE_AND_MUX_CHANNEL 7 #define MESON_SAR_ADC_TEMP_OFFSET 27 /* temperature sensor calibration information in eFuse */ @@ -201,6 +202,19 @@ .datasheet_name = "TEMP_SENSOR", \ } +#define MESON_SAR_ADC_MUX(_chan, _sel) { \ + .type = IIO_VOLTAGE, \ + .channel = _chan, \ + .indexed = 1, \ + .address = MESON_SAR_ADC_VOLTAGE_AND_MUX_CHANNEL, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ + BIT(IIO_CHAN_INFO_AVERAGE_RAW), \ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_CALIBBIAS) | \ + BIT(IIO_CHAN_INFO_CALIBSCALE), \ + .datasheet_name = "SAR_ADC_MUX_"#_sel, \ +} + enum meson_sar_adc_avg_mode { NO_AVERAGING = 0x0, MEAN_AVERAGING = 0x1, @@ -233,6 +247,27 @@ enum meson_sar_adc_channel_index { INDEX_CHAN_6, INDEX_CHAN_7, INDEX_CHAN_SOFT_TIMESTAMP, + INDEX_MUX_0_VSS, + INDEX_MUX_1_VDD_DIV4, + INDEX_MUX_2_VDD_DIV2, + INDEX_MUX_3_VDD_MUL3_DIV4, + INDEX_MUX_4_VDD, +}; + +static enum meson_sar_adc_chan7_mux_sel chan7_mux_values[] = { + CHAN7_MUX_VSS, + CHAN7_MUX_VDD_DIV4, + CHAN7_MUX_VDD_DIV2, + CHAN7_MUX_VDD_MUL3_DIV4, + CHAN7_MUX_VDD, +}; + +static const char * const chan7_mux_names[] = { + "gnd", + "0.25vdd", + "0.5vdd", + "0.75vdd", + "vdd", }; static const struct iio_chan_spec meson_sar_adc_iio_channels[] = { @@ -245,6 +280,11 @@ static const struct iio_chan_spec meson_sar_adc_iio_channels[] = { MESON_SAR_ADC_CHAN(INDEX_CHAN_6), MESON_SAR_ADC_CHAN(INDEX_CHAN_7), IIO_CHAN_SOFT_TIMESTAMP(INDEX_CHAN_SOFT_TIMESTAMP), + MESON_SAR_ADC_MUX(INDEX_MUX_0_VSS, 0), + MESON_SAR_ADC_MUX(INDEX_MUX_1_VDD_DIV4, 1), + MESON_SAR_ADC_MUX(INDEX_MUX_2_VDD_DIV2, 2), + MESON_SAR_ADC_MUX(INDEX_MUX_3_VDD_MUL3_DIV4, 3), + MESON_SAR_ADC_MUX(INDEX_MUX_4_VDD, 4), MESON_SAR_ADC_TEMP_CHAN(), /* must be the last item */ }; @@ -284,6 +324,7 @@ struct meson_sar_adc_priv { bool temperature_sensor_calibrated; u8 temperature_sensor_coefficient; u16 temperature_sensor_adc_val; + enum meson_sar_adc_chan7_mux_sel chan7_mux_sel; }; static const struct regmap_config meson_sar_adc_regmap_config_gxbb = { @@ -348,6 +389,8 @@ static void meson_sar_adc_set_chan7_mux(struct iio_dev *indio_dev, MESON_SAR_ADC_REG3_CTRL_CHAN7_MUX_SEL_MASK, regval); usleep_range(10, 20); + + priv->chan7_mux_sel = sel; } static int meson_sar_adc_read_raw_sample(struct iio_dev *indio_dev, @@ -443,6 +486,15 @@ static void meson_sar_adc_enable_channel(struct iio_dev *indio_dev, regmap_update_bits(priv->regmap, MESON_SAR_ADC_DELTA_10, MESON_SAR_ADC_DELTA_10_TEMP_SEL, regval); + } else if (chan->address == MESON_SAR_ADC_VOLTAGE_AND_MUX_CHANNEL) { + enum meson_sar_adc_chan7_mux_sel sel; + + if (chan->channel == INDEX_CHAN_7) + sel = CHAN7_MUX_CH7_INPUT; + else + sel = chan7_mux_values[chan->channel - INDEX_MUX_0_VSS]; + if (sel != priv->chan7_mux_sel) + meson_sar_adc_set_chan7_mux(indio_dev, sel); } } @@ -1015,7 +1067,7 @@ static int meson_sar_adc_calib(struct iio_dev *indio_dev) meson_sar_adc_set_chan7_mux(indio_dev, CHAN7_MUX_VDD_DIV4); usleep_range(10, 20); ret = meson_sar_adc_get_sample(indio_dev, - &indio_dev->channels[INDEX_CHAN_7], + &indio_dev->channels[INDEX_MUX_1_VDD_DIV4], MEAN_AVERAGING, EIGHT_SAMPLES, &value0); if (ret < 0) goto out; @@ -1023,7 +1075,7 @@ static int meson_sar_adc_calib(struct iio_dev *indio_dev) meson_sar_adc_set_chan7_mux(indio_dev, CHAN7_MUX_VDD_MUL3_DIV4); usleep_range(10, 20); ret = meson_sar_adc_get_sample(indio_dev, - &indio_dev->channels[INDEX_CHAN_7], + &indio_dev->channels[INDEX_MUX_3_VDD_MUL3_DIV4], MEAN_AVERAGING, EIGHT_SAMPLES, &value1); if (ret < 0) goto out; @@ -1050,8 +1102,13 @@ static int read_label(struct iio_dev *indio_dev, { if (chan->type == IIO_TEMP) return sprintf(label, "%s\n", "temp-sensor"); - if (chan->type == IIO_VOLTAGE) - return sprintf(label, "channel-%d\n", chan->channel); + if (chan->type == IIO_VOLTAGE) { + if (chan->channel <= INDEX_CHAN_7) + return sprintf(label, "channel-%d\n", chan->channel); + if (chan->channel >= INDEX_MUX_0_VSS) + return sprintf(label, "%s\n", + chan7_mux_names[chan->channel - INDEX_MUX_0_VSS]); + } return 0; }