From patchwork Fri Mar 15 11:29:02 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mircea Caprioru X-Patchwork-Id: 10854581 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1265B15AC for ; Fri, 15 Mar 2019 11:29:23 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E534E2899F for ; Fri, 15 Mar 2019 11:29:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D3FF429DFE; Fri, 15 Mar 2019 11:29:22 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B20822899F for ; 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Fri, 15 Mar 2019 04:29:12 -0700 Received: from mircea-Latitude-E6540.analog.com (10.50.3.101) by NWD2HUBCAS7.ad.analog.com (10.64.69.107) with Microsoft SMTP Server id 14.3.408.0; Fri, 15 Mar 2019 07:29:11 -0400 From: Mircea Caprioru To: CC: , , , , , , Mircea Caprioru Subject: [PATCH 1/2] staging: iio: adc: ad7192: Use DT clock binding Date: Fri, 15 Mar 2019 13:29:02 +0200 Message-ID: <20190315112903.15855-1-mircea.caprioru@analog.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-ADIRoutedOnPrem: True X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-HT: Tenant X-Forefront-Antispam-Report: CIP:137.71.25.55;IPV:NLI;CTRY:US;EFV:NLI;SFV:NSPM;SFS:(10009020)(346002)(396003)(376002)(39860400002)(136003)(2980300002)(199004)(189003)(50226002)(77096007)(16586007)(54906003)(7696005)(476003)(51416003)(2616005)(47776003)(126002)(106002)(486006)(316002)(426003)(106466001)(14444005)(36756003)(6666004)(53416004)(2351001)(8936002)(44832011)(107886003)(478600001)(356004)(2906002)(1076003)(246002)(4326008)(8676002)(50466002)(48376002)(305945005)(72206003)(26005)(7636002)(186003)(86362001)(6916009)(336012)(5660300002);DIR:OUT;SFP:1101;SCL:1;SRVR:BLUPR03MB551;H:nwd2mta1.analog.com;FPR:;SPF:Pass;LANG:en;PTR:nwd2mail10.analog.com;A:1;MX:1; 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Through the DT the external clock binding is specified. If this is not provided then the device will use the internal clock source. With the external clock binding there is the option to use a clock or a crystal as the clock source. When an external crystal is used it is connected to MCLK1 and MCLK2 pins. If the external clock is used only MCLK2 pin will be connected. Signed-off-by: Mircea Caprioru --- drivers/staging/iio/adc/ad7192.c | 84 ++++++++++++++++++++++---------- drivers/staging/iio/adc/ad7192.h | 2 - 2 files changed, 58 insertions(+), 28 deletions(-) diff --git a/drivers/staging/iio/adc/ad7192.c b/drivers/staging/iio/adc/ad7192.c index 27f962b8c4ef..5c54ce380fa5 100644 --- a/drivers/staging/iio/adc/ad7192.c +++ b/drivers/staging/iio/adc/ad7192.c @@ -7,6 +7,7 @@ */ #include +#include #include #include #include @@ -156,14 +157,16 @@ struct ad7192_state { struct regulator *avdd; struct regulator *dvdd; + struct clk *mclk; u16 int_vref_mv; - u32 mclk; + u32 fclk; u32 f_order; u32 mode; u32 conf; u32 scale_avail[8][2]; u8 gpocon; u8 devid; + u8 clock_sel; struct mutex lock; /* protect sensor state */ struct ad_sigma_delta sd; @@ -226,6 +229,27 @@ static inline bool ad7192_valid_external_frequency(u32 freq) freq <= AD7192_EXT_FREQ_MHZ_MAX); } +static int ad7192_of_clock_select(struct ad7192_state *st) +{ + struct device_node *np = st->sd.spi->dev.of_node; + unsigned int clock_sel; + + clock_sel = AD7192_CLK_INT; + + /* use internal clock */ + if (PTR_ERR(st->mclk) == -ENOENT) { + if (of_property_read_bool(np, "adi,int-clock-output-enable")) + clock_sel = AD7192_CLK_INT_CO; + } else { + if (of_property_read_bool(np, "adi,clock-xtal")) + clock_sel = AD7192_CLK_EXT_MCLK1_2; + else + clock_sel = AD7192_CLK_EXT_MCLK2; + } + + return clock_sel; +} + static int ad7192_setup(struct ad7192_state *st, const struct ad7192_platform_data *pdata) { @@ -250,28 +274,8 @@ static int ad7192_setup(struct ad7192_state *st, dev_warn(&st->sd.spi->dev, "device ID query failed (0x%X)\n", id); - switch (pdata->clock_source_sel) { - case AD7192_CLK_INT: - case AD7192_CLK_INT_CO: - st->mclk = AD7192_INT_FREQ_MHZ; - break; - case AD7192_CLK_EXT_MCLK1_2: - case AD7192_CLK_EXT_MCLK2: - if (ad7192_valid_external_frequency(pdata->ext_clk_hz)) { - st->mclk = pdata->ext_clk_hz; - break; - } - dev_err(&st->sd.spi->dev, "Invalid frequency setting %u\n", - pdata->ext_clk_hz); - ret = -EINVAL; - goto out; - default: - ret = -EINVAL; - goto out; - } - st->mode = AD7192_MODE_SEL(AD7192_MODE_IDLE) | - AD7192_MODE_CLKSRC(pdata->clock_source_sel) | + AD7192_MODE_CLKSRC(st->clock_sel) | AD7192_MODE_RATE(480); st->conf = AD7192_CONF_GAIN(0); @@ -496,7 +500,7 @@ static int ad7192_read_raw(struct iio_dev *indio_dev, *val -= 273 * ad7192_get_temp_scale(unipolar); return IIO_VAL_INT; case IIO_CHAN_INFO_SAMP_FREQ: - *val = st->mclk / + *val = st->fclk / (st->f_order * 1024 * AD7192_MODE_RATE(st->mode)); return IIO_VAL_INT; } @@ -543,7 +547,7 @@ static int ad7192_write_raw(struct iio_dev *indio_dev, break; } - div = st->mclk / (val * st->f_order * 1024); + div = st->fclk / (val * st->f_order * 1024); if (div < 1 || div > 1023) { ret = -EINVAL; break; @@ -706,15 +710,42 @@ static int ad7192_probe(struct spi_device *spi) if (ret) goto error_disable_dvdd; + st->fclk = AD7192_INT_FREQ_MHZ; + + st->mclk = devm_clk_get(&st->sd.spi->dev, "mclk"); + if (IS_ERR(st->mclk) && PTR_ERR(st->mclk) != -ENOENT) { + ret = PTR_ERR(st->mclk); + goto error_remove_trigger; + } + + st->clock_sel = ad7192_of_clock_select(st); + + if (st->clock_sel == AD7192_CLK_EXT_MCLK1_2 || + st->clock_sel == AD7192_CLK_EXT_MCLK2) { + ret = clk_prepare_enable(st->mclk); + if (ret < 0) + goto error_remove_trigger; + + st->fclk = clk_get_rate(st->mclk); + if (!ad7192_valid_external_frequency(st->fclk)) { + ret = -EINVAL; + dev_err(&spi->dev, + "External clock frequency out of bounds\n"); + goto error_disable_clk; + } + } + ret = ad7192_setup(st, pdata); if (ret) - goto error_remove_trigger; + goto error_disable_clk; ret = iio_device_register(indio_dev); if (ret < 0) - goto error_remove_trigger; + goto error_disable_clk; return 0; +error_disable_clk: + clk_disable_unprepare(st->mclk); error_remove_trigger: ad_sd_cleanup_buffer_and_trigger(indio_dev); error_disable_dvdd: @@ -731,6 +762,7 @@ static int ad7192_remove(struct spi_device *spi) struct ad7192_state *st = iio_priv(indio_dev); iio_device_unregister(indio_dev); + clk_disable_unprepare(st->mclk); ad_sd_cleanup_buffer_and_trigger(indio_dev); regulator_disable(st->dvdd); diff --git a/drivers/staging/iio/adc/ad7192.h b/drivers/staging/iio/adc/ad7192.h index 7433a43c2611..3be3ee269ed5 100644 --- a/drivers/staging/iio/adc/ad7192.h +++ b/drivers/staging/iio/adc/ad7192.h @@ -33,8 +33,6 @@ struct ad7192_platform_data { u16 vref_mv; - u8 clock_source_sel; - u32 ext_clk_hz; bool refin2_en; bool rej60_en; bool sinc3_en; From patchwork Fri Mar 15 11:29:03 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mircea Caprioru X-Patchwork-Id: 10854583 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9627E15AC for ; Fri, 15 Mar 2019 11:29:39 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7F3732A62B for ; Fri, 15 Mar 2019 11:29:39 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7264E2A823; 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Received-SPF: Pass (protection.outlook.com: domain of analog.com designates 137.71.25.55 as permitted sender) receiver=protection.outlook.com; client-ip=137.71.25.55; helo=nwd2mta1.analog.com; Received: from nwd2mta1.analog.com (137.71.25.55) by BL2NAM02FT035.mail.protection.outlook.com (10.152.77.157) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.20.1709.13 via Frontend Transport; Fri, 15 Mar 2019 11:29:22 +0000 Received: from NWD2HUBCAS7.ad.analog.com (nwd2hubcas7.ad.analog.com [10.64.69.107]) by nwd2mta1.analog.com (8.13.8/8.13.8) with ESMTP id x2FBTLFR008781 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=OK); Fri, 15 Mar 2019 04:29:21 -0700 Received: from mircea-Latitude-E6540.analog.com (10.50.3.101) by NWD2HUBCAS7.ad.analog.com (10.64.69.107) with Microsoft SMTP Server id 14.3.408.0; Fri, 15 Mar 2019 07:29:21 -0400 From: Mircea Caprioru To: CC: , , , , , , Mircea Caprioru Subject: [PATCH 2/2] staging: iio: adc: ad7192: Convert platform data to DT properties Date: Fri, 15 Mar 2019 13:29:03 +0200 Message-ID: <20190315112903.15855-2-mircea.caprioru@analog.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190315112903.15855-1-mircea.caprioru@analog.com> References: <20190315112903.15855-1-mircea.caprioru@analog.com> MIME-Version: 1.0 X-ADIRoutedOnPrem: True X-EOPAttributedMessage: 0 X-MS-Office365-Filtering-HT: Tenant X-Forefront-Antispam-Report: CIP:137.71.25.55;IPV:NLI;CTRY:US;EFV:NLI;SFV:NSPM;SFS:(10009020)(136003)(39860400002)(396003)(376002)(346002)(2980300002)(189003)(199004)(72206003)(8676002)(50466002)(6916009)(486006)(7696005)(2616005)(106002)(7636002)(246002)(8936002)(47776003)(478600001)(51416003)(4326008)(6666004)(336012)(48376002)(426003)(305945005)(5660300002)(356004)(36756003)(50226002)(44832011)(107886003)(76176011)(86362001)(446003)(77096007)(2906002)(26005)(11346002)(186003)(106466001)(476003)(126002)(316002)(53416004)(54906003)(14444005)(2351001)(1076003)(16586007);DIR:OUT;SFP:1101;SCL:1;SRVR:BL2PR03MB548;H:nwd2mta1.analog.com;FPR:;SPF:Pass;LANG:en;PTR:nwd2mail10.analog.com;MX:1;A:1; X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: dd582063-3e31-4080-dfcc-08d6a9397c48 X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600127)(711020)(4605104)(4608103)(4709054)(2017052603328)(7153060);SRVR:BL2PR03MB548; X-MS-TrafficTypeDiagnostic: BL2PR03MB548: X-Microsoft-Antispam-PRVS: X-Forefront-PRVS: 09778E995A X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam-Message-Info: GuyGEbGhNh+ot3w6fB3Bxcrgmb4iPuU2+69fMGL+1Od8+Y2qikEWIRIHlejdEudB+7dpd9Osjx0jG7K8pizwSYl5Im9+xsapoEh24nBhVvQX3G2eOGR3WK78BukQ47074t6KaDzEr4lT0CvdLuqDDZHH3a8oMKR0hm+YQlqdRvex6j21RrB4n3rq5/NWl4CbOLQP7Nro3OUJv37LGmb6j99DKWwnbwVjGoJRvMyTXE2opUAcO1PtB0eMMeljolEiGIZcrsMvjkwU1GoYN5ZOGu4ftGuuuyEwdo7KT0NF+Zj4IQzwj73RCV2nlleObNaZUtz96klMfmcFgvORoiWvJ9qvGxjBubCzJ97Elx5jUOmQZ0GO/pQBxHaRsGQ4Ubyr8WmloKs/8/F1+U1dqTT8KkRclHi9B72Yd6GaEJeo5Kw= X-OriginatorOrg: analog.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Mar 2019 11:29:22.4843 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: dd582063-3e31-4080-dfcc-08d6a9397c48 X-MS-Exchange-CrossTenant-Id: eaa689b4-8f87-40e0-9c6f-7228de4d754a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=eaa689b4-8f87-40e0-9c6f-7228de4d754a;Ip=[137.71.25.55];Helo=[nwd2mta1.analog.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL2PR03MB548 Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch will remove platform data members and replace them with device tree properties. These properties will be subject to further modifications and probably replaced with other functionalities at some point in time. Signed-off-by: Mircea Caprioru --- drivers/staging/iio/adc/ad7192.c | 33 ++++++++++++++++++++------------ drivers/staging/iio/adc/ad7192.h | 7 ------- 2 files changed, 21 insertions(+), 19 deletions(-) diff --git a/drivers/staging/iio/adc/ad7192.c b/drivers/staging/iio/adc/ad7192.c index 5c54ce380fa5..c56eaefbbe41 100644 --- a/drivers/staging/iio/adc/ad7192.c +++ b/drivers/staging/iio/adc/ad7192.c @@ -250,10 +250,11 @@ static int ad7192_of_clock_select(struct ad7192_state *st) return clock_sel; } -static int ad7192_setup(struct ad7192_state *st, - const struct ad7192_platform_data *pdata) +static int ad7192_setup(struct ad7192_state *st, struct device_node *np) { struct iio_dev *indio_dev = spi_get_drvdata(st->sd.spi); + bool rej60_en, sinc3_en, refin2_en, chop_en; + bool buf_en, bipolar, burnout_curr_en; unsigned long long scale_uv; int i, ret, id; @@ -280,18 +281,22 @@ static int ad7192_setup(struct ad7192_state *st, st->conf = AD7192_CONF_GAIN(0); - if (pdata->rej60_en) + rej60_en = of_property_read_bool(np, "adi,rejection-60-Hz-enable"); + if (rej60_en) st->mode |= AD7192_MODE_REJ60; - if (pdata->sinc3_en) + sinc3_en = of_property_read_bool(np, "adi,sinc3-filter-enable"); + if (sinc3_en) st->mode |= AD7192_MODE_SINC3; - if (pdata->refin2_en && st->devid != ID_AD7195) + refin2_en = of_property_read_bool(np, "adi,refin2-pins-enable"); + if (refin2_en && st->devid != ID_AD7195) st->conf |= AD7192_CONF_REFSEL; - if (pdata->chop_en) { + chop_en = of_property_read_bool(np, "adi,chop-enable"); + if (chop_en) { st->conf |= AD7192_CONF_CHOP; - if (pdata->sinc3_en) + if (sinc3_en) st->f_order = 3; /* SINC 3rd order */ else st->f_order = 4; /* SINC 4th order */ @@ -299,15 +304,19 @@ static int ad7192_setup(struct ad7192_state *st, st->f_order = 1; } - if (pdata->buf_en) + buf_en = of_property_read_bool(np, "adi,buffer-enable"); + if (buf_en) st->conf |= AD7192_CONF_BUF; - if (pdata->unipolar_en) + bipolar = of_property_read_bool(np, "bipolar"); + if (!bipolar) st->conf |= AD7192_CONF_UNIPOLAR; - if (pdata->burnout_curr_en && pdata->buf_en && !pdata->chop_en) { + burnout_curr_en = of_property_read_bool(np, + "adi,burnout-currents-enable"); + if (burnout_curr_en && buf_en && !chop_en) { st->conf |= AD7192_CONF_BURN; - } else if (pdata->burnout_curr_en) { + } else if (burnout_curr_en) { dev_warn(&st->sd.spi->dev, "Can't enable burnout currents: see CHOP or buffer\n"); } @@ -735,7 +744,7 @@ static int ad7192_probe(struct spi_device *spi) } } - ret = ad7192_setup(st, pdata); + ret = ad7192_setup(st, spi->dev.of_node); if (ret) goto error_disable_clk; diff --git a/drivers/staging/iio/adc/ad7192.h b/drivers/staging/iio/adc/ad7192.h index 3be3ee269ed5..aa3322c14e38 100644 --- a/drivers/staging/iio/adc/ad7192.h +++ b/drivers/staging/iio/adc/ad7192.h @@ -33,13 +33,6 @@ struct ad7192_platform_data { u16 vref_mv; - bool refin2_en; - bool rej60_en; - bool sinc3_en; - bool chop_en; - bool buf_en; - bool unipolar_en; - bool burnout_curr_en; }; #endif /* IIO_ADC_AD7192_H_ */