From patchwork Sun Oct 1 14:12:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Duje_Mihanovi=C4=87?= X-Patchwork-Id: 13405397 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0CFD1179B2 for ; Sun, 1 Oct 2023 14:13:09 +0000 (UTC) Received: from mx.skole.hr (mx2.hosting.skole.hr [161.53.165.186]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 32EC0BC; Sun, 1 Oct 2023 07:13:07 -0700 (PDT) Received: from mx2.hosting.skole.hr (localhost.localdomain [127.0.0.1]) by mx.skole.hr (mx.skole.hr) with ESMTP id D0F71849BE; Sun, 1 Oct 2023 16:13:05 +0200 (CEST) From: =?utf-8?q?Duje_Mihanovi=C4=87?= Date: Sun, 01 Oct 2023 16:12:57 +0200 Subject: [PATCH RFC v4 6/6] input: ads7846: Move wait_for_sync() logic to driver Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20231001-pxa-gpio-v4-6-0f3b975e6ed5@skole.hr> References: <20231001-pxa-gpio-v4-0-0f3b975e6ed5@skole.hr> In-Reply-To: <20231001-pxa-gpio-v4-0-0f3b975e6ed5@skole.hr> To: Daniel Mack , Haojian Zhuang , Robert Jarzmik , Russell King , Alan Stern , Greg Kroah-Hartman , Linus Walleij , Bartosz Golaszewski , Andy Shevchenko , Dmitry Torokhov , Mark Brown Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, linux-gpio@vger.kernel.org, linux-input@vger.kernel.org, linux-spi@vger.kernel.org, =?utf-8?q?Duje_Mih?= =?utf-8?q?anovi=C4=87?= X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=4116; i=duje.mihanovic@skole.hr; h=from:subject:message-id; bh=vDxjARPpIkB52+0U6yxYfBgdugyxZKs36TcEKwzrmIE=; b=owEBbQKS/ZANAwAIAZoRnrBCLZbhAcsmYgBlGX5oeO7RLXrgpT84soQS3RW8AL4f+9KqS2biH w8i7dlZgViJAjMEAAEIAB0WIQRT351NnD/hEPs2LXiaEZ6wQi2W4QUCZRl+aAAKCRCaEZ6wQi2W 4YO+D/9DQqpYETk638UYYXIIbSeoFZF/ozW1wcqL+jDyIxrota8mS/axOJe4lCC7bUBB8pRi/t3 VoTKgmjv+wK8Vnt9E6xtyTF0S1JoMkv28l8i5/c97MdGWb9wEd7DLEQ9b/sFNIhUt/FhwRFPEDZ Evq1LZFBbGAYr4uN3xIKjgd+zX+pElQiMU/uDqMov92Ac/CeX0pQNVkpgTeRR+YcBA2JNRKWCyF Ypnf2qUh+MBfkMNryG5Eh8oO2/T+9gBLFUtgg6yWDgO9seRO48EJjpuHTGpv3o0eJr/tBLblcYr dcWFEvjIc2tFC+kAfcIfJ2lpCnDO+GT/hiN75clChJQgUYiaWH0aoeGZb2eXlZ3AaJIw4n30n9a 8l+1yP2L9IOt/QsNHc6YRPfWqJkFIvn+UPyI7cvub9udcl0NwmOkbScnHdQZyQyffhjhA4g3d5O FX04w8F52TuCWG3yyPRy6zJuxXYJtT3v1BjGw94zcOEs/XG1i0p5JX7hiqVei9jkocYoePUahu0 bUxD6RxK/Lx58IqSK8IW9X19+kcBWqNdOXdopqk9SwXneXTfJw8I2s7X9nUKeilV4/P3GPh+FSV taulT/VVCaH9q79o0TVydh1177M5vLOWyOrMO6xInQt0camzl6DZrsj8SQdZz0Y0finkO03uatj U3OUdZsr6rWtqZw== X-Developer-Key: i=duje.mihanovic@skole.hr; a=openpgp; fpr=53DF9D4D9C3FE110FB362D789A119EB0422D96E1 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net If this code is left in the board file, the sync GPIO would have to be separated into another lookup table during conversion to the GPIO descriptor API (which is also done in this patch). The only user of this code (Sharp Spitz) is also converted in this patch. Signed-off-by: Duje Mihanović Reviewed-by: Linus Walleij Acked-by: Mark Brown --- arch/arm/mach-pxa/spitz.c | 12 ++---------- drivers/input/touchscreen/ads7846.c | 22 +++++++++++++++------- include/linux/spi/ads7846.h | 1 - 3 files changed, 17 insertions(+), 18 deletions(-) diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c index 701fba130ac4..22d5c5645b8f 100644 --- a/arch/arm/mach-pxa/spitz.c +++ b/arch/arm/mach-pxa/spitz.c @@ -520,22 +520,12 @@ static inline void spitz_leds_init(void) {} * SSP Devices ******************************************************************************/ #if defined(CONFIG_SPI_PXA2XX) || defined(CONFIG_SPI_PXA2XX_MODULE) -static void spitz_ads7846_wait_for_hsync(void) -{ - while (gpio_get_value(SPITZ_GPIO_HSYNC)) - cpu_relax(); - - while (!gpio_get_value(SPITZ_GPIO_HSYNC)) - cpu_relax(); -} - static struct ads7846_platform_data spitz_ads7846_info = { .model = 7846, .vref_delay_usecs = 100, .x_plate_ohms = 419, .y_plate_ohms = 486, .pressure_max = 1024, - .wait_for_sync = spitz_ads7846_wait_for_hsync, }; static struct gpiod_lookup_table spitz_ads7846_gpio_table = { @@ -543,6 +533,8 @@ static struct gpiod_lookup_table spitz_ads7846_gpio_table = { .table = { GPIO_LOOKUP("gpio-pxa", SPITZ_GPIO_TP_INT, "pendown", GPIO_ACTIVE_LOW), + GPIO_LOOKUP("gpio-pxa", SPITZ_GPIO_HSYNC, + "sync", GPIO_ACTIVE_LOW), { } }, }; diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c index faea40dd66d0..894f179bfa8d 100644 --- a/drivers/input/touchscreen/ads7846.c +++ b/drivers/input/touchscreen/ads7846.c @@ -138,8 +138,7 @@ struct ads7846 { void *filter_data; int (*get_pendown_state)(void); struct gpio_desc *gpio_pendown; - - void (*wait_for_sync)(void); + struct gpio_desc *sync; }; enum ads7846_filter { @@ -636,9 +635,14 @@ static const struct attribute_group ads784x_attr_group = { }; /*--------------------------------------------------------------------------*/ - -static void null_wait_for_sync(void) +static void ads7846_wait_for_sync(struct ads7846 *ts) { + if (!ts->sync) return; + while (!gpiod_get_value(ts->sync)) + cpu_relax(); + + while (gpiod_get_value(ts->sync)) + cpu_relax(); } static int ads7846_debounce_filter(void *ads, int data_idx, int *val) @@ -803,7 +807,7 @@ static void ads7846_read_state(struct ads7846 *ts) packet->last_cmd_idx = 0; while (true) { - ts->wait_for_sync(); + ads7846_wait_for_sync(ts); m = &ts->msg[msg_idx]; error = spi_sync(ts->spi, m); @@ -1261,8 +1265,6 @@ static int ads7846_probe(struct spi_device *spi) ts->penirq_recheck_delay_usecs = pdata->penirq_recheck_delay_usecs; - ts->wait_for_sync = pdata->wait_for_sync ? : null_wait_for_sync; - snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(dev)); snprintf(ts->name, sizeof(ts->name), "ADS%d Touchscreen", ts->model); @@ -1361,6 +1363,12 @@ static int ads7846_probe(struct spi_device *spi) if (err) return err; + ts->sync = devm_gpiod_get_optional(dev, "sync", GPIOD_IN); + if (IS_ERR(ts->sync)) { + dev_err(dev, "Failed to get sync GPIO: %pe\n", ts->sync); + return PTR_ERR(ts->sync); + } + err = input_register_device(input_dev); if (err) return err; diff --git a/include/linux/spi/ads7846.h b/include/linux/spi/ads7846.h index a04c1c34c344..fa7c4f119023 100644 --- a/include/linux/spi/ads7846.h +++ b/include/linux/spi/ads7846.h @@ -38,7 +38,6 @@ struct ads7846_platform_data { int gpio_pendown_debounce; /* platform specific debounce time for * the gpio_pendown */ int (*get_pendown_state)(void); - void (*wait_for_sync)(void); bool wakeup; unsigned long irq_flags; };