From patchwork Wed Dec 8 00:43:11 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gwendal Grignou X-Patchwork-Id: 12663089 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C4358C433F5 for ; Wed, 8 Dec 2021 00:45:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231616AbhLHAsw (ORCPT ); Tue, 7 Dec 2021 19:48:52 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50254 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236000AbhLHAqy (ORCPT ); Tue, 7 Dec 2021 19:46:54 -0500 Received: from mail-pg1-x52d.google.com (mail-pg1-x52d.google.com [IPv6:2607:f8b0:4864:20::52d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3C84FC061746 for ; Tue, 7 Dec 2021 16:43:23 -0800 (PST) Received: by mail-pg1-x52d.google.com with SMTP id m15so562332pgu.11 for ; Tue, 07 Dec 2021 16:43:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=4F4EbPUt7EtrJJvibYxN3NdN+PNF9DLnCpFTCxD5lMk=; b=TOb3TU7cQ7ks/8I6a4VY/xCwzY3O6iBur9qrMeefpyW0NwKWPaKUN2Iv0UzvfGf3Ax 2LosrpgM9Wfk0tX+Csx8fBrsCBEP2onoYGyOCJ6B+6KuOHAW9wihYpxrN1z2ohRwcL+b N70NcNL1Muxv6NS6ALj+JnCHQVk8g7kumcAm4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=4F4EbPUt7EtrJJvibYxN3NdN+PNF9DLnCpFTCxD5lMk=; b=VTRLaJhKGOAtLRa59HaVk5QHA+J4gDZsZzxMul38SjYghjTV+AMvMUcim9Ew1l8D7L eIzSWSIc36MIdb6Nv/iBjO7gz13ZXWeAPZJWeoEXmgrxoac+4i5etIdE3baINb+YeF4E vK7z34HzkbqKdtwrUzZhRisuVGlL62bX/Xpgg+NRAOHpRBLb3BjI5+hm6l/wwrA8yhH7 FC6LYGe22gg0SGMcTL1O7H0IDcZllPmxBvWzoEaqflYM0l5Kp6O/LeGzLE7DbjBHXATj XWO3TmxpbkFMU7RnZI+6BL2ehNsLIo0ydhuyZow6owO9ZDKf+pXjXjtziIgrzZzBvkMl HhZA== X-Gm-Message-State: AOAM531B1TBv7puMQg837PE5klzkIWOeAzMX651Kkp//4IzvytnPw7GN Hwpu+XbXkV9MhjbAEwZ2gRVxXw== X-Google-Smtp-Source: ABdhPJwGazY7VJWo2081XvR+Gz4S9zmg3+jXf+CQgckWYpuF3RlOYXpVTPIRVE8eXX20zIJBWvLvsA== X-Received: by 2002:a63:2a8a:: with SMTP id q132mr26588624pgq.23.1638924202728; Tue, 07 Dec 2021 16:43:22 -0800 (PST) Received: from localhost ([2620:15c:202:201:e4:362a:40f4:7f9f]) by smtp.gmail.com with UTF8SMTPSA id e4sm627490pgi.21.2021.12.07.16.43.21 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 07 Dec 2021 16:43:22 -0800 (PST) From: Gwendal Grignou To: jic23@kernel.org, lars@metafoo.de, swboyd@chromium.org Cc: andy.shevchenko@gmail.com, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, Gwendal Grignou Subject: [PATCH v5 5/5] iio: sx9324: Add dt_binding support Date: Tue, 7 Dec 2021 16:43:11 -0800 Message-Id: <20211208004311.3098571-6-gwendal@chromium.org> X-Mailer: git-send-email 2.34.1.400.ga245620fadb-goog In-Reply-To: <20211208004311.3098571-1-gwendal@chromium.org> References: <20211208004311.3098571-1-gwendal@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Based on bindings/iio/proximity/semtech,sx9324.yaml, implement retrieving sensor hardware property and alter default values. Signed-off-by: Gwendal Grignou --- Changes in v5: - Use prefixed binding names. - Fix long lines. Changes in v4: - Fix spelling in commit title. Changes in v3: - Remove duplicate information. - Use intervals instead of enum. - Fix filter description. Changes in v2: - Fix interrupt documentation wording. drivers/iio/proximity/sx9324.c | 164 +++++++++++++++++++++++++++++++++ 1 file changed, 164 insertions(+) diff --git a/drivers/iio/proximity/sx9324.c b/drivers/iio/proximity/sx9324.c index a27aae64e6d4e1..86b7c83ea644e8 100644 --- a/drivers/iio/proximity/sx9324.c +++ b/drivers/iio/proximity/sx9324.c @@ -77,6 +77,7 @@ #define SX9324_REG_PROX_CTRL0 0x30 #define SX9324_REG_PROX_CTRL0_GAIN_MASK GENMASK(5, 3) #define SX9324_REG_PROX_CTRL0_GAIN_1 0x80 +#define SX9324_REG_PROX_CTRL0_RAWFILT_MASK GENMASK(2, 0) #define SX9324_REG_PROX_CTRL0_RAWFILT_1P50 0x01 #define SX9324_REG_PROX_CTRL1 0x31 #define SX9324_REG_PROX_CTRL2 0x32 @@ -751,6 +752,74 @@ static int sx9324_write_raw(struct iio_dev *indio_dev, return -EINVAL; } +static const struct sx_common_reg_default sx9324_default_regs[] = { + { SX9324_REG_IRQ_MSK, 0x00 }, + { SX9324_REG_IRQ_CFG0, 0x00 }, + { SX9324_REG_IRQ_CFG1, SX9324_REG_IRQ_CFG1_FAILCOND }, + { SX9324_REG_IRQ_CFG2, 0x00 }, + { SX9324_REG_GNRL_CTRL0, SX9324_REG_GNRL_CTRL0_SCANPERIOD_100MS }, + /* + * The lower 4 bits should not be set as it enable sensors measurements. + * Turning the detection on before the configuration values are set to + * good values can cause the device to return erroneous readings. + */ + { SX9324_REG_GNRL_CTRL1, SX9324_REG_GNRL_CTRL1_PAUSECTRL }, + + { SX9324_REG_AFE_CTRL0, 0x00 }, + { SX9324_REG_AFE_CTRL3, 0x00 }, + { SX9324_REG_AFE_CTRL4, SX9324_REG_AFE_CTRL4_FREQ_83_33HZ | + SX9324_REG_AFE_CTRL4_RES_100 }, + { SX9324_REG_AFE_CTRL6, 0x00 }, + { SX9324_REG_AFE_CTRL7, SX9324_REG_AFE_CTRL4_FREQ_83_33HZ | + SX9324_REG_AFE_CTRL4_RES_100 }, + + /* TODO(gwendal): PHx use chip default or all grounded? */ + { SX9324_REG_AFE_PH0, 0x29 }, + { SX9324_REG_AFE_PH1, 0x26 }, + { SX9324_REG_AFE_PH2, 0x1a }, + { SX9324_REG_AFE_PH3, 0x16 }, + + { SX9324_REG_AFE_CTRL8, SX9324_REG_AFE_CTRL8_RESFILTN_4KOHM }, + { SX9324_REG_AFE_CTRL9, SX9324_REG_AFE_CTRL9_AGAIN_1 }, + + { SX9324_REG_PROX_CTRL0, SX9324_REG_PROX_CTRL0_GAIN_1 | + SX9324_REG_PROX_CTRL0_RAWFILT_1P50 }, + { SX9324_REG_PROX_CTRL1, SX9324_REG_PROX_CTRL0_GAIN_1 | + SX9324_REG_PROX_CTRL0_RAWFILT_1P50 }, + { SX9324_REG_PROX_CTRL2, SX9324_REG_PROX_CTRL2_AVGNEG_THRESH_16K }, + { SX9324_REG_PROX_CTRL3, SX9324_REG_PROX_CTRL3_AVGDEB_2SAMPLES | + SX9324_REG_PROX_CTRL3_AVGPOS_THRESH_16K }, + { SX9324_REG_PROX_CTRL4, SX9324_REG_PROX_CTRL4_AVGNEG_FILT_2 | + SX9324_REG_PROX_CTRL3_AVGPOS_FILT_256 }, + { SX9324_REG_PROX_CTRL5, 0x00 }, + { SX9324_REG_PROX_CTRL6, SX9324_REG_PROX_CTRL6_PROXTHRESH_32 }, + { SX9324_REG_PROX_CTRL7, SX9324_REG_PROX_CTRL6_PROXTHRESH_32 }, + { SX9324_REG_ADV_CTRL0, 0x00 }, + { SX9324_REG_ADV_CTRL1, 0x00 }, + { SX9324_REG_ADV_CTRL2, 0x00 }, + { SX9324_REG_ADV_CTRL3, 0x00 }, + { SX9324_REG_ADV_CTRL4, 0x00 }, + { SX9324_REG_ADV_CTRL5, SX9324_REG_ADV_CTRL5_STARTUP_SENSOR_1 | + SX9324_REG_ADV_CTRL5_STARTUP_METHOD_1 }, + { SX9324_REG_ADV_CTRL6, 0x00 }, + { SX9324_REG_ADV_CTRL7, 0x00 }, + { SX9324_REG_ADV_CTRL8, 0x00 }, + { SX9324_REG_ADV_CTRL9, 0x00 }, + /* Body/Table threshold */ + { SX9324_REG_ADV_CTRL10, 0x00 }, + { SX9324_REG_ADV_CTRL11, 0x00 }, + { SX9324_REG_ADV_CTRL12, 0x00 }, + /* TODO(gwendal): SAR currenly disabled */ + { SX9324_REG_ADV_CTRL13, 0x00 }, + { SX9324_REG_ADV_CTRL14, 0x00 }, + { SX9324_REG_ADV_CTRL15, 0x00 }, + { SX9324_REG_ADV_CTRL16, 0x00 }, + { SX9324_REG_ADV_CTRL17, 0x00 }, + { SX9324_REG_ADV_CTRL18, 0x00 }, + { SX9324_REG_ADV_CTRL19, SX9324_REG_ADV_CTRL19_HIGHT_FAILURE_THRESH_SATURATION }, + { SX9324_REG_ADV_CTRL20, SX9324_REG_ADV_CTRL19_HIGHT_FAILURE_THRESH_SATURATION }, +}; + /* Activate all channels and perform an initial compensation. */ static int sx9324_init_compensation(struct iio_dev *indio_dev) { @@ -775,6 +844,99 @@ static int sx9324_init_compensation(struct iio_dev *indio_dev) return ret; } +static const struct sx_common_reg_default * +sx9324_get_default_reg(struct device *dev, int idx, + struct sx_common_reg_default *reg_def) +{ +#define SX9324_PIN_DEF "semtech,ph0-pin" +#define SX9324_RESOLUTION_DEF "semtech,ph01-resolution" +#define SX9324_PROXRAW_DEF "semtech,ph01-proxraw-strength" + unsigned int pin_defs[SX9324_NUM_PINS]; + char prop[] = SX9324_PROXRAW_DEF; + u32 start = 0, raw = 0, pos = 0; + int ret, count, ph, pin; + + memcpy(reg_def, &sx9324_default_regs[idx], sizeof(*reg_def)); + switch (reg_def->reg) { + case SX9324_REG_AFE_PH0: + case SX9324_REG_AFE_PH1: + case SX9324_REG_AFE_PH2: + case SX9324_REG_AFE_PH3: + ph = reg_def->reg - SX9324_REG_AFE_PH0; + scnprintf(prop, ARRAY_SIZE(prop), "semtech,ph%d-pin", ph); + + count = device_property_count_u32(dev, prop); + if (count != ARRAY_SIZE(pin_defs)) + break; + ret = device_property_read_u32_array(dev, prop, pin_defs, + ARRAY_SIZE(pin_defs)); + for (pin = 0; pin < SX9324_NUM_PINS; pin++) + raw |= (pin_defs[pin] << (2 * pin)) & + SX9324_REG_AFE_PH0_PIN_MASK(pin); + reg_def->def = raw; + break; + case SX9324_REG_AFE_CTRL4: + case SX9324_REG_AFE_CTRL7: + if (reg_def->reg == SX9324_REG_AFE_CTRL4) + strncpy(prop, "semtech,ph01-resolution", + ARRAY_SIZE(prop)); + else + strncpy(prop, "semtech,ph23-resolution", + ARRAY_SIZE(prop)); + + ret = device_property_read_u32(dev, prop, &raw); + if (ret) + break; + + raw = ilog2(raw) - 3; + + reg_def->def &= ~SX9324_REG_AFE_CTRL4_RESOLUTION_MASK; + reg_def->def |= FIELD_PREP(SX9324_REG_AFE_CTRL4_RESOLUTION_MASK, + raw); + break; + case SX9324_REG_ADV_CTRL5: + ret = device_property_read_u32(dev, "semtech,startup-sensor", + &start); + if (ret) + break; + + reg_def->def &= ~SX9324_REG_ADV_CTRL5_STARTUPSENS_MASK; + reg_def->def |= FIELD_PREP(SX9324_REG_ADV_CTRL5_STARTUPSENS_MASK, + start); + break; + case SX9324_REG_PROX_CTRL4: + ret = device_property_read_u32(dev, "semtech,avg-pos-strength", + &pos); + if (ret) + break; + + /* Powers of 2, except for a gap between 16 and 64 */ + raw = clamp(ilog2(pos), 3, 11) - (pos >= 32 ? 4 : 3); + + reg_def->def &= ~SX9324_REG_PROX_CTRL4_AVGPOSFILT_MASK; + reg_def->def |= FIELD_PREP(SX9324_REG_PROX_CTRL4_AVGPOSFILT_MASK, + raw); + break; + case SX9324_REG_PROX_CTRL0: + case SX9324_REG_PROX_CTRL1: + if (reg_def->reg == SX9324_REG_PROX_CTRL0) + strncpy(prop, "semtech,ph01-proxraw-strength", + ARRAY_SIZE(prop)); + else + strncpy(prop, "semtech,ph23-proxraw-strength", + ARRAY_SIZE(prop)); + ret = device_property_read_u32(dev, prop, &raw); + if (ret) + break; + + reg_def->def &= ~SX9324_REG_PROX_CTRL0_RAWFILT_MASK; + reg_def->def |= FIELD_PREP(SX9324_REG_PROX_CTRL0_RAWFILT_MASK, + raw); + break; + } + return reg_def; +} + static int sx9324_check_whoami(struct device *dev, struct iio_dev *indio_dev) { @@ -795,12 +957,14 @@ static const struct sx_common_chip_info sx9324_chip_info = { .mask_enable_chan = SX9324_REG_GNRL_CTRL1_PHEN_MASK, .irq_msk_offset = 3, .num_channels = SX9324_NUM_CHANNELS, + .num_default_regs = ARRAY_SIZE(sx9324_default_regs), .ops = { .read_prox_data = sx9324_read_prox_data, .check_whoami = sx9324_check_whoami, .init_compensation = sx9324_init_compensation, .wait_for_sample = sx9324_wait_for_sample, + .get_default_reg = sx9324_get_default_reg, }, .iio_channels = sx9324_channels,