From patchwork Tue Oct 23 19:04:41 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nishad Kamdar X-Patchwork-Id: 10653547 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 2607413BF for ; Tue, 23 Oct 2018 19:04:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 10EAD29EDE for ; Tue, 23 Oct 2018 19:04:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0289629F43; Tue, 23 Oct 2018 19:04:51 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,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 5955D29EDE for ; Tue, 23 Oct 2018 19:04:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728672AbeJXD3a (ORCPT ); Tue, 23 Oct 2018 23:29:30 -0400 Received: from mail-pf1-f193.google.com ([209.85.210.193]:37499 "EHLO mail-pf1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728385AbeJXD3a (ORCPT ); Tue, 23 Oct 2018 23:29:30 -0400 Received: by mail-pf1-f193.google.com with SMTP id j23-v6so1142617pfi.4; Tue, 23 Oct 2018 12:04:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:mime-version:content-disposition :user-agent; bh=DU6qnRzjht9KffKNJrgKbi4GgtqvFuagk3ORvRXbkPU=; b=pDSoqyN92b78imM/y9swuErNRgOY73VsUaVSNZaytDfn6FQ4VMbe2jp08K7sct4fyi AJbRfDIbCoE18PXPcQZVJNhgJElxazWYgqD9FC3pZwQnekrmAWjcdEhT7HJZei+q6DC4 DxBmhxpOd/FZGqvji6nzz507y0b+loTPzYfZmQY6ki6cOjbHES6tnTOk2LB2BixNf949 gCgnG35Qc8xOgilKLqBda5jcmU6OW7MnHmx22yNcr+mHZ4i5ywH+x2uzaAnA3k/+igWy ebvo2V5M3Hcan+dqVWv31W3iytaqdxBSLbL2RAZErqOv464iGzz3QU2pTMy3JkZwx2uH WXPg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:mime-version :content-disposition:user-agent; bh=DU6qnRzjht9KffKNJrgKbi4GgtqvFuagk3ORvRXbkPU=; b=Dqh4EBGeblgwih4w0aXcFYvGibK8Om/jdsszFZWuRBS/nZJXnva8l77+IU5o/dYpx3 bW2MVtX3yMuFLuCrVMb/pOSHnLKKQ4tBC+H+Y/ry3h+BiatO5rbZGK7tAGBGra34o5Gd rMxzOEk8nmfbpIfTQhVmFkbgLb28v+6H3Z0Yk1DVXufB+g/D4hsw/bRaGA7IieyaqwuE JxXVGx7etoj9Y1u+AKKXIO/Eb8Ik1LHm72rINiW4xb0xA8OEyPzGiVLuD+TC5Gl7Gk+s WHL9xY1HQdt1ZA2Ffc5dZyrVjgXToKOcMMSVCp1pvRnoSrFxspY/VWEc5c9y9lVHLL+8 BLyQ== X-Gm-Message-State: AGRZ1gJK9ZehhHMFkFr7bboSL2z6YTry2HEWpPu/FcuKqtFyNTGQo1Ni Nv5VnO5deVdCTR8dLtA5Ko8= X-Google-Smtp-Source: AJdET5f5LsCoOs24F3V7d+/9Sx9VDUqZ1Fx8l3el83jBpCHzTPIl/ltXVVQSzT1JXYkOqzCkycCKpg== X-Received: by 2002:a63:63c3:: with SMTP id x186mr6225740pgb.330.1540321489506; Tue, 23 Oct 2018 12:04:49 -0700 (PDT) Received: from nishad ([106.51.27.228]) by smtp.gmail.com with ESMTPSA id n72-v6sm3359814pfh.166.2018.10.23.12.04.45 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 23 Oct 2018 12:04:48 -0700 (PDT) Date: Wed, 24 Oct 2018 00:34:41 +0530 From: Nishad Kamdar To: Slawomir Stepien Cc: Lars-Peter Clausen , Michael Hennerich , Jonathan Cameron , Hartmut Knaack , Peter Meerwald-Stadler , Greg Kroah-Hartman , linux-iio@vger.kernel.org, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org Subject: [PATCH v3] staging: iio: ad2s1210: Switch to the gpio descriptor interface Message-ID: <20181023190437.GA12974@nishad> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.9.4 (2018-02-28) 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 Use the gpiod interface instead of the deprecated old non-descriptor interface. Signed-off-by: Nishad Kamdar --- Changes in v3: - Use a pointer to pointer for gpio_desc in struct ad2s1210_gpio as it will be used to modify a pointer. - Use dot notation to initialize the structure. - Use a pointer variable to avoid writing gpios[i]. Changes in v2: - Use the spi_device struct embedded in st instead of passing it as an argument to ad2s1210_setup_gpios(). - Use an array of structs to reduce redundant code in in ad2s1210_setup_gpios(). - Remove ad2s1210_free_gpios() as devm API is being used. --- drivers/staging/iio/resolver/ad2s1210.c | 92 ++++++++++++++----------- drivers/staging/iio/resolver/ad2s1210.h | 3 - 2 files changed, 50 insertions(+), 45 deletions(-) diff --git a/drivers/staging/iio/resolver/ad2s1210.c b/drivers/staging/iio/resolver/ad2s1210.c index ac13b99bd9cb..fbf0cc722979 100644 --- a/drivers/staging/iio/resolver/ad2s1210.c +++ b/drivers/staging/iio/resolver/ad2s1210.c @@ -15,7 +15,7 @@ #include #include #include -#include +#include #include #include @@ -69,10 +69,21 @@ enum ad2s1210_mode { static const unsigned int ad2s1210_resolution_value[] = { 10, 12, 14, 16 }; +struct ad2s1210_gpio { + struct gpio_desc **ptr; + const char *name; + unsigned long flags; +}; + struct ad2s1210_state { const struct ad2s1210_platform_data *pdata; struct mutex lock; struct spi_device *sdev; + struct gpio_desc *sample; + struct gpio_desc *a0; + struct gpio_desc *a1; + struct gpio_desc *res0; + struct gpio_desc *res1; unsigned int fclkin; unsigned int fexcit; bool hysteresis; @@ -91,8 +102,8 @@ static const int ad2s1210_mode_vals[4][2] = { static inline void ad2s1210_set_mode(enum ad2s1210_mode mode, struct ad2s1210_state *st) { - gpio_set_value(st->pdata->a[0], ad2s1210_mode_vals[mode][0]); - gpio_set_value(st->pdata->a[1], ad2s1210_mode_vals[mode][1]); + gpiod_set_value(st->a0, ad2s1210_mode_vals[mode][0]); + gpiod_set_value(st->a1, ad2s1210_mode_vals[mode][1]); st->mode = mode; } @@ -152,8 +163,8 @@ int ad2s1210_update_frequency_control_word(struct ad2s1210_state *st) static unsigned char ad2s1210_read_resolution_pin(struct ad2s1210_state *st) { - int resolution = (gpio_get_value(st->pdata->res[0]) << 1) | - gpio_get_value(st->pdata->res[1]); + int resolution = (gpiod_get_value(st->res0) << 1) | + gpiod_get_value(st->res1); return ad2s1210_resolution_value[resolution]; } @@ -164,10 +175,10 @@ static const int ad2s1210_res_pins[4][2] = { static inline void ad2s1210_set_resolution_pin(struct ad2s1210_state *st) { - gpio_set_value(st->pdata->res[0], - ad2s1210_res_pins[(st->resolution - 10) / 2][0]); - gpio_set_value(st->pdata->res[1], - ad2s1210_res_pins[(st->resolution - 10) / 2][1]); + gpiod_set_value(st->res0, + ad2s1210_res_pins[(st->resolution - 10) / 2][0]); + gpiod_set_value(st->res1, + ad2s1210_res_pins[(st->resolution - 10) / 2][1]); } static inline int ad2s1210_soft_reset(struct ad2s1210_state *st) @@ -401,15 +412,15 @@ static ssize_t ad2s1210_clear_fault(struct device *dev, int ret; mutex_lock(&st->lock); - gpio_set_value(st->pdata->sample, 0); + gpiod_set_value(st->sample, 0); /* delay (2 * tck + 20) nano seconds */ udelay(1); - gpio_set_value(st->pdata->sample, 1); + gpiod_set_value(st->sample, 1); ret = ad2s1210_config_read(st, AD2S1210_REG_FAULT); if (ret < 0) goto error_ret; - gpio_set_value(st->pdata->sample, 0); - gpio_set_value(st->pdata->sample, 1); + gpiod_set_value(st->sample, 0); + gpiod_set_value(st->sample, 1); error_ret: mutex_unlock(&st->lock); @@ -466,7 +477,7 @@ static int ad2s1210_read_raw(struct iio_dev *indio_dev, s16 vel; mutex_lock(&st->lock); - gpio_set_value(st->pdata->sample, 0); + gpiod_set_value(st->sample, 0); /* delay (6 * tck + 20) nano seconds */ udelay(1); @@ -512,7 +523,7 @@ static int ad2s1210_read_raw(struct iio_dev *indio_dev, } error_ret: - gpio_set_value(st->pdata->sample, 1); + gpiod_set_value(st->sample, 1); /* delay (2 * tck + 20) nano seconds */ udelay(1); mutex_unlock(&st->lock); @@ -630,30 +641,32 @@ static const struct iio_info ad2s1210_info = { static int ad2s1210_setup_gpios(struct ad2s1210_state *st) { - unsigned long flags = st->pdata->gpioin ? GPIOF_DIR_IN : GPIOF_DIR_OUT; - struct gpio ad2s1210_gpios[] = { - { st->pdata->sample, GPIOF_DIR_IN, "sample" }, - { st->pdata->a[0], flags, "a0" }, - { st->pdata->a[1], flags, "a1" }, - { st->pdata->res[0], flags, "res0" }, - { st->pdata->res[0], flags, "res1" }, + int ret, i; + struct spi_device *spi = st->sdev; + struct ad2s1210_gpio *pin; + unsigned long flags = st->pdata->gpioin ? GPIOD_IN : GPIOD_OUT_LOW; + + struct ad2s1210_gpio gpios[] = { + {.ptr = &st->sample, .name = "sample", .flags = GPIOD_IN}, + {.ptr = &st->a0, .name = "a0", .flags = flags}, + {.ptr = &st->a1, .name = "a1", .flags = flags}, + {.ptr = &st->res0, .name = "res0", .flags = flags}, + {.ptr = &st->res1, .name = "res1", .flags = flags}, }; - return gpio_request_array(ad2s1210_gpios, ARRAY_SIZE(ad2s1210_gpios)); -} - -static void ad2s1210_free_gpios(struct ad2s1210_state *st) -{ - unsigned long flags = st->pdata->gpioin ? GPIOF_DIR_IN : GPIOF_DIR_OUT; - struct gpio ad2s1210_gpios[] = { - { st->pdata->sample, GPIOF_DIR_IN, "sample" }, - { st->pdata->a[0], flags, "a0" }, - { st->pdata->a[1], flags, "a1" }, - { st->pdata->res[0], flags, "res0" }, - { st->pdata->res[0], flags, "res1" }, - }; + for (i = 0; i < ARRAY_SIZE(gpios); i++) { + pin = &gpios[i]; + *pin->ptr = devm_gpiod_get(&spi->dev, pin->name, + pin->flags); + if (IS_ERR(pin->ptr)) { + ret = PTR_ERR(pin->ptr); + dev_err(&spi->dev, "Failed to request %s GPIO: %d\n", + pin->name, ret); + return ret; + } + } - gpio_free_array(ad2s1210_gpios, ARRAY_SIZE(ad2s1210_gpios)); + return 0; } static int ad2s1210_probe(struct spi_device *spi) @@ -692,7 +705,7 @@ static int ad2s1210_probe(struct spi_device *spi) ret = iio_device_register(indio_dev); if (ret) - goto error_free_gpios; + return ret; st->fclkin = spi->max_speed_hz; spi->mode = SPI_MODE_3; @@ -700,10 +713,6 @@ static int ad2s1210_probe(struct spi_device *spi) ad2s1210_initial(st); return 0; - -error_free_gpios: - ad2s1210_free_gpios(st); - return ret; } static int ad2s1210_remove(struct spi_device *spi) @@ -711,7 +720,6 @@ static int ad2s1210_remove(struct spi_device *spi) struct iio_dev *indio_dev = spi_get_drvdata(spi); iio_device_unregister(indio_dev); - ad2s1210_free_gpios(iio_priv(indio_dev)); return 0; } diff --git a/drivers/staging/iio/resolver/ad2s1210.h b/drivers/staging/iio/resolver/ad2s1210.h index e9b2147701fc..63d479b20a6c 100644 --- a/drivers/staging/iio/resolver/ad2s1210.h +++ b/drivers/staging/iio/resolver/ad2s1210.h @@ -12,9 +12,6 @@ #define _AD2S1210_H struct ad2s1210_platform_data { - unsigned int sample; - unsigned int a[2]; - unsigned int res[2]; bool gpioin; }; #endif /* _AD2S1210_H */