From patchwork Mon May 16 19:34:11 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ivaylo Dimitrov X-Patchwork-Id: 9105691 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id D9308BF29F for ; Mon, 16 May 2016 19:36:39 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id AAD93202C8 for ; Mon, 16 May 2016 19:36:38 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8F32920173 for ; Mon, 16 May 2016 19:36:37 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1b2OIL-0005Mc-B2; Mon, 16 May 2016 19:35:13 +0000 Received: from mail-wm0-x242.google.com ([2a00:1450:400c:c09::242]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1b2OHy-0004RD-Al for linux-arm-kernel@lists.infradead.org; Mon, 16 May 2016 19:34:52 +0000 Received: by mail-wm0-x242.google.com with SMTP id w143so20282424wmw.3 for ; Mon, 16 May 2016 12:34:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=bgv/Xlg6MP0x5K15rx5h8Gb20eoIiKyPsbLn4T5xt+s=; b=Zay7cmqpVjQYraEZa2w87wK6bKdLrisJ8jjzcSqjcG8QIU8tN2Bb1ytovXL8cVdmJg Yv6jt0pqEkR3frIEKbMIj5TW74Kz85MEOoZiSXaGolDOPgQ8+9dGMqgbDPdHdNQsXVYl 6lXvzkHQ3MGmqxG67FoyhXMjmEDyhM/6WoWTP2ahfQhkCDQDoJ0mrHOF+NwVjntw/0iY d8FLWr333Vvty+mpNLhZ0UVWkQqQzjwwxOMfK/lR1UVXgfRp+ubDml9xMCeAL3RmcUoC MWVyhNWIufNRR1kyiL6N70Zt25KglU418Ixwua6+fCV8vup6zU3DwH2rFmUV4vDD10J/ Im6Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=bgv/Xlg6MP0x5K15rx5h8Gb20eoIiKyPsbLn4T5xt+s=; b=PI4x3L1dJRrLWFuNCdGNq2+CCMPWibDnLerhDefOTHpL68WHYJ+nKi1CsoIUKxjJnM I1QJcTy/yzHqdkvAM5ebVPwb0NAfHm3xd+iTeE0U5T+uXCcc/eo3VD08AKcX5vsaYm1c iOpkWB8qk39Xcf37sz4KQsr7Czfyzf1eSTHWCmLE4rrnRhEqOSp7iQqvfsmrGTRePAeP COjVK7mq9qvj2z7FtZNryKHHyGuMTONYlJ9NJeFof2K5W3bxNUIwFJ/t8ZL3OuNkNFyD fFl0YcLMs3nxETgKeCuvLKlW6DtQJB2aa0IxbfaLqGyGvPfRdmrlNjGlGj/KiBUNpktT NnKg== X-Gm-Message-State: AOPr4FUdGpW/vcnmJNAkUo3JNN075xTq0UziAjkSCFc4X4r3PWL+HylGF5NXq8lHCHACUw== X-Received: by 10.194.231.169 with SMTP id th9mr18594471wjc.32.1463427268763; Mon, 16 May 2016 12:34:28 -0700 (PDT) Received: from localhost.localdomain ([46.249.74.23]) by smtp.gmail.com with ESMTPSA id g132sm20069306wme.0.2016.05.16.12.34.26 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 16 May 2016 12:34:28 -0700 (PDT) From: Ivaylo Dimitrov To: robh+dt@kernel.org, mark.rutland@arm.com, pawel.moll@arm.com, ijc+devicetree@hellion.org.uk, galak@codeaurora.org, thierry.reding@gmail.com, bcousson@baylibre.com, tony@atomide.com, linux@arm.linux.org.uk, mchehab@osg.samsung.com Subject: [PATCH v2 3/6] ir-rx51: use PWM framework instead of OMAP dmtimer Date: Mon, 16 May 2016 22:34:11 +0300 Message-Id: <1463427254-7728-4-git-send-email-ivo.g.dimitrov.75@gmail.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1463427254-7728-1-git-send-email-ivo.g.dimitrov.75@gmail.com> References: <1463427254-7728-1-git-send-email-ivo.g.dimitrov.75@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160516_123450_721094_F6C5699A X-CRM114-Status: GOOD ( 19.95 ) X-Spam-Score: -2.5 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Ivaylo Dimitrov , linux-pwm@vger.kernel.org, linux-kernel@vger.kernel.org, sre@kernel.org, pali.rohar@gmail.com, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-5.5 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, T_DKIM_INVALID, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Convert driver to use PWM framework instead of calling dmtimer functions directly for PWM timer. Remove paragraph about writing to the Free Software Foundation's mailing address while at it. Signed-off-by: Ivaylo Dimitrov --- arch/arm/mach-omap2/board-rx51-peripherals.c | 1 - arch/arm/mach-omap2/pdata-quirks.c | 1 - drivers/media/rc/ir-rx51.c | 85 ++++++++++++++-------------- include/linux/platform_data/media/ir-rx51.h | 2 - 4 files changed, 44 insertions(+), 45 deletions(-) diff --git a/arch/arm/mach-omap2/board-rx51-peripherals.c b/arch/arm/mach-omap2/board-rx51-peripherals.c index 9a70739..e487575 100644 --- a/arch/arm/mach-omap2/board-rx51-peripherals.c +++ b/arch/arm/mach-omap2/board-rx51-peripherals.c @@ -1242,7 +1242,6 @@ static struct pwm_omap_dmtimer_pdata __maybe_unused pwm_dmtimer_pdata = { #if defined(CONFIG_IR_RX51) || defined(CONFIG_IR_RX51_MODULE) static struct lirc_rx51_platform_data rx51_lirc_data = { .set_max_mpu_wakeup_lat = omap_pm_set_max_mpu_wakeup_lat, - .pwm_timer = 9, /* Use GPT 9 for CIR */ #if IS_ENABLED(CONFIG_OMAP_DM_TIMER) .dmtimer = &pwm_dmtimer_pdata, #endif diff --git a/arch/arm/mach-omap2/pdata-quirks.c b/arch/arm/mach-omap2/pdata-quirks.c index ea3a7d5..af65781 100644 --- a/arch/arm/mach-omap2/pdata-quirks.c +++ b/arch/arm/mach-omap2/pdata-quirks.c @@ -491,7 +491,6 @@ static struct pwm_omap_dmtimer_pdata pwm_dmtimer_pdata = { static struct lirc_rx51_platform_data __maybe_unused rx51_lirc_data = { .set_max_mpu_wakeup_lat = omap_pm_set_max_mpu_wakeup_lat, - .pwm_timer = 9, /* Use GPT 9 for CIR */ #if IS_ENABLED(CONFIG_OMAP_DM_TIMER) .dmtimer = &pwm_dmtimer_pdata, #endif diff --git a/drivers/media/rc/ir-rx51.c b/drivers/media/rc/ir-rx51.c index da839c3..5096ef3 100644 --- a/drivers/media/rc/ir-rx51.c +++ b/drivers/media/rc/ir-rx51.c @@ -12,13 +12,7 @@ * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * */ - #include #include #include @@ -26,6 +20,7 @@ #include #include #include +#include #include #include @@ -43,7 +38,7 @@ #define TIMER_MAX_VALUE 0xffffffff struct lirc_rx51 { - pwm_omap_dmtimer *pwm_timer; + struct pwm_device *pwm; pwm_omap_dmtimer *pulse_timer; struct pwm_omap_dmtimer_pdata *dmtimer; struct device *dev; @@ -58,32 +53,28 @@ struct lirc_rx51 { int wbuf[WBUF_LEN]; int wbuf_index; unsigned long device_is_open; - int pwm_timer_num; }; static void lirc_rx51_on(struct lirc_rx51 *lirc_rx51) { - lirc_rx51->dmtimer->set_pwm(lirc_rx51->pwm_timer, 0, 1, - PWM_OMAP_DMTIMER_TRIGGER_OVERFLOW_AND_COMPARE); + pwm_enable(lirc_rx51->pwm); } static void lirc_rx51_off(struct lirc_rx51 *lirc_rx51) { - lirc_rx51->dmtimer->set_pwm(lirc_rx51->pwm_timer, 0, 1, - PWM_OMAP_DMTIMER_TRIGGER_NONE); + pwm_disable(lirc_rx51->pwm); } static int init_timing_params(struct lirc_rx51 *lirc_rx51) { - u32 load, match; - - load = -(lirc_rx51->fclk_khz * 1000 / lirc_rx51->freq); - match = -(lirc_rx51->duty_cycle * -load / 100); - lirc_rx51->dmtimer->set_load(lirc_rx51->pwm_timer, 1, load); - lirc_rx51->dmtimer->set_match(lirc_rx51->pwm_timer, 1, match); - lirc_rx51->dmtimer->write_counter(lirc_rx51->pwm_timer, TIMER_MAX_VALUE - 2); - lirc_rx51->dmtimer->start(lirc_rx51->pwm_timer); + struct pwm_device *pwm = lirc_rx51->pwm; + int duty, period = DIV_ROUND_CLOSEST(NSEC_PER_SEC, lirc_rx51->freq); + + duty = DIV_ROUND_CLOSEST(lirc_rx51->duty_cycle * period, 100); lirc_rx51->dmtimer->set_int_enable(lirc_rx51->pulse_timer, 0); + + pwm_config(pwm, duty, period); + lirc_rx51->dmtimer->start(lirc_rx51->pulse_timer); lirc_rx51->match = 0; @@ -165,7 +156,7 @@ end: /* Stop TX here */ lirc_rx51_off(lirc_rx51); lirc_rx51->wbuf_index = -1; - lirc_rx51->dmtimer->stop(lirc_rx51->pwm_timer); + lirc_rx51->dmtimer->stop(lirc_rx51->pulse_timer); lirc_rx51->dmtimer->set_int_enable(lirc_rx51->pulse_timer, 0); wake_up_interruptible(&lirc_rx51->wqueue); @@ -176,13 +167,13 @@ end: static int lirc_rx51_init_port(struct lirc_rx51 *lirc_rx51) { struct clk *clk_fclk; - int retval, pwm_timer = lirc_rx51->pwm_timer_num; + int retval; - lirc_rx51->pwm_timer = lirc_rx51->dmtimer->request_specific(pwm_timer); - if (lirc_rx51->pwm_timer == NULL) { - dev_err(lirc_rx51->dev, ": Error requesting GPT%d timer\n", - pwm_timer); - return -EBUSY; + lirc_rx51->pwm = pwm_get(lirc_rx51->dev, NULL); + if (IS_ERR(lirc_rx51->pwm)) { + retval = PTR_ERR(lirc_rx51->pwm); + dev_err(lirc_rx51->dev, ": pwm_get failed: %d\n", retval); + return retval; } lirc_rx51->pulse_timer = lirc_rx51->dmtimer->request(); @@ -192,15 +183,11 @@ static int lirc_rx51_init_port(struct lirc_rx51 *lirc_rx51) goto err1; } - lirc_rx51->dmtimer->set_source(lirc_rx51->pwm_timer, - PWM_OMAP_DMTIMER_SRC_SYS_CLK); lirc_rx51->dmtimer->set_source(lirc_rx51->pulse_timer, PWM_OMAP_DMTIMER_SRC_SYS_CLK); - - lirc_rx51->dmtimer->enable(lirc_rx51->pwm_timer); lirc_rx51->dmtimer->enable(lirc_rx51->pulse_timer); - - lirc_rx51->irq_num = lirc_rx51->dmtimer->get_irq(lirc_rx51->pulse_timer); + lirc_rx51->irq_num = + lirc_rx51->dmtimer->get_irq(lirc_rx51->pulse_timer); retval = request_irq(lirc_rx51->irq_num, lirc_rx51_interrupt_handler, IRQF_SHARED, "lirc_pulse_timer", lirc_rx51); if (retval) { @@ -208,7 +195,7 @@ static int lirc_rx51_init_port(struct lirc_rx51 *lirc_rx51) goto err2; } - clk_fclk = lirc_rx51->dmtimer->get_fclk(lirc_rx51->pwm_timer); + clk_fclk = lirc_rx51->dmtimer->get_fclk(lirc_rx51->pulse_timer); lirc_rx51->fclk_khz = clk_get_rate(clk_fclk) / 1000; return 0; @@ -216,7 +203,7 @@ static int lirc_rx51_init_port(struct lirc_rx51 *lirc_rx51) err2: lirc_rx51->dmtimer->free(lirc_rx51->pulse_timer); err1: - lirc_rx51->dmtimer->free(lirc_rx51->pwm_timer); + pwm_put(lirc_rx51->pwm); return retval; } @@ -226,11 +213,10 @@ static int lirc_rx51_free_port(struct lirc_rx51 *lirc_rx51) lirc_rx51->dmtimer->set_int_enable(lirc_rx51->pulse_timer, 0); free_irq(lirc_rx51->irq_num, lirc_rx51); lirc_rx51_off(lirc_rx51); - lirc_rx51->dmtimer->disable(lirc_rx51->pwm_timer); lirc_rx51->dmtimer->disable(lirc_rx51->pulse_timer); - lirc_rx51->dmtimer->free(lirc_rx51->pwm_timer); lirc_rx51->dmtimer->free(lirc_rx51->pulse_timer); lirc_rx51->wbuf_index = -1; + pwm_put(lirc_rx51->pwm); return 0; } @@ -387,7 +373,6 @@ static int lirc_rx51_release(struct inode *inode, struct file *file) } static struct lirc_rx51 lirc_rx51 = { - .freq = 38000, .duty_cycle = 50, .wbuf_index = -1, }; @@ -445,14 +430,34 @@ static int lirc_rx51_resume(struct platform_device *dev) static int lirc_rx51_probe(struct platform_device *dev) { + struct pwm_device *pwm; + lirc_rx51_driver.features = LIRC_RX51_DRIVER_FEATURES; lirc_rx51.pdata = dev->dev.platform_data; + + if (!lirc_rx51.pdata) { + dev_err(&dev->dev, "Platform Data is missing\n"); + return -ENXIO; + } + if (!lirc_rx51.pdata->dmtimer) { dev_err(&dev->dev, "no dmtimer?\n"); return -ENODEV; } - lirc_rx51.pwm_timer_num = lirc_rx51.pdata->pwm_timer; + pwm = pwm_get(&dev->dev, NULL); + if (IS_ERR(pwm)) { + int err = PTR_ERR(pwm); + + if (err != -EPROBE_DEFER) + dev_err(&dev->dev, "pwm_get failed: %d\n", err); + return err; + } + + /* Use default, in case userspace does not set the carrier */ + lirc_rx51.freq = DIV_ROUND_CLOSEST(pwm_get_period(pwm), NSEC_PER_SEC); + pwm_put(pwm); + lirc_rx51.dmtimer = lirc_rx51.pdata->dmtimer; lirc_rx51.dev = &dev->dev; lirc_rx51_driver.dev = &dev->dev; @@ -464,8 +469,6 @@ static int lirc_rx51_probe(struct platform_device *dev) lirc_rx51_driver.minor); return lirc_rx51_driver.minor; } - dev_info(lirc_rx51.dev, "registration ok, minor: %d, pwm: %d\n", - lirc_rx51_driver.minor, lirc_rx51.pwm_timer_num); return 0; } diff --git a/include/linux/platform_data/media/ir-rx51.h b/include/linux/platform_data/media/ir-rx51.h index 3038120..6acf22d 100644 --- a/include/linux/platform_data/media/ir-rx51.h +++ b/include/linux/platform_data/media/ir-rx51.h @@ -2,8 +2,6 @@ #define _LIRC_RX51_H struct lirc_rx51_platform_data { - int pwm_timer; - int(*set_max_mpu_wakeup_lat)(struct device *dev, long t); struct pwm_omap_dmtimer_pdata *dmtimer; };