From patchwork Fri Sep 29 13:14:02 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: 727856 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 0F8D5E71D36 for ; Fri, 29 Sep 2023 13:15:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233331AbjI2NPR (ORCPT ); Fri, 29 Sep 2023 09:15:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40934 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233304AbjI2NPO (ORCPT ); Fri, 29 Sep 2023 09:15:14 -0400 Received: from mx.skole.hr (mx2.hosting.skole.hr [161.53.165.186]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4931F1B4; Fri, 29 Sep 2023 06:15:10 -0700 (PDT) Received: from mx2.hosting.skole.hr (localhost.localdomain [127.0.0.1]) by mx.skole.hr (mx.skole.hr) with ESMTP id D4E488475E; Fri, 29 Sep 2023 15:15:08 +0200 (CEST) From: =?utf-8?q?Duje_Mihanovi=C4=87?= Date: Fri, 29 Sep 2023 15:14:02 +0200 Subject: [PATCH RFC v3 4/6] ARM: pxa: Convert reset driver to GPIO descriptors MIME-Version: 1.0 Message-Id: <20230929-pxa-gpio-v3-4-af8d5e5d1f34@skole.hr> References: <20230929-pxa-gpio-v3-0-af8d5e5d1f34@skole.hr> In-Reply-To: <20230929-pxa-gpio-v3-0-af8d5e5d1f34@skole.hr> To: Daniel Mack , Haojian Zhuang , Robert Jarzmik , Russell King , Alan Stern , Greg Kroah-Hartman , Linus Walleij , Bartosz Golaszewski , Andy Shevchenko Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, linux-gpio@vger.kernel.org, =?utf-8?q?Duje_Mihan?= =?utf-8?q?ovi=C4=87?= X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=3654; i=duje.mihanovic@skole.hr; h=from:subject:message-id; bh=P+Mn+7rnZeSrsHrXwwh73RzIYGjBVvhAgESHp6DzA+A=; b=owEBbQKS/ZANAwAIAZoRnrBCLZbhAcsmYgBlFs3XoAQyb355PIO8PgTe7++rLbalmrVzqHDm8 mkrj5qE87mJAjMEAAEIAB0WIQRT351NnD/hEPs2LXiaEZ6wQi2W4QUCZRbN1wAKCRCaEZ6wQi2W 4aqND/9rFsjp6O60B7TMyvYW6Tf2lAPf1RU4Ns043Xeko6Ire3TxG6VnLRVZ4M+TIDLJkvZmvk/ 926OKxCZ3BLSmgvIb5tgXY8eNv8KEARMBPUW1+688Mpg6ffqBqa+P9NFcu66P2jiaaPno6hAdrp 3SqxsXMp9WIL50+5eNx00ZglLGkPcX8sedQEV+YzInL7+SyQGTL1DfArAy1dZBfD0At9r9XBn/Q VJw/EKPPCYaulj49PCHy+h6uz8qBjbb2uTX8u8oioFoFGezNBsc4XiQWzI90EO7Bmnq2phjfvS0 MpwcXb40eS6VqudVDrYWAF7DMuvQdCe5QowJDBnoi/1r4dohgCSyfgv2EjQK8YiI/WP4io4d/s7 NfsY2Cc5E17y0G5e+57ssJjUOUbF3qtyOHNkTGV+2P/jalpxgC0kLhMBM5zYoNXcx3wg4UAkQRV aSrZWMj5lq5RCDrt5rJhjN5J1v+PAke1M4V7J24u5AvEZlVB00Zlh4fNnRu8jADD+9qOk/fSBmo Exw41SSrTaEY2ZXu6Wl6QQqM8fxKipD+rY08k8Q3rr1pNoNR++7WjzGJcXBpZo6mqQlj1rt6njn BmNDzJ2SJz+HZIHuRDQPYKqFPJrQlJXKE4IXoTn1t+YmbmLFoph3MCI34nOwJ473qXYAWvWdvgf DwIMd8Zp/VxVRNg== X-Developer-Key: i=duje.mihanovic@skole.hr; a=openpgp; fpr=53DF9D4D9C3FE110FB362D789A119EB0422D96E1 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org The PXA reset driver still uses the legacy GPIO interface for configuring and asserting the reset pin. Convert it to use the GPIO descriptor interface. Acked-by: Linus Walleij Signed-off-by: Duje Mihanović --- arch/arm/mach-pxa/reset.c | 39 +++++++++++++-------------------------- arch/arm/mach-pxa/reset.h | 3 +-- arch/arm/mach-pxa/spitz.c | 6 +++++- 3 files changed, 19 insertions(+), 29 deletions(-) diff --git a/arch/arm/mach-pxa/reset.c b/arch/arm/mach-pxa/reset.c index 27293549f8ad..2bfa66f99555 100644 --- a/arch/arm/mach-pxa/reset.c +++ b/arch/arm/mach-pxa/reset.c @@ -2,7 +2,7 @@ #include #include #include -#include +#include #include #include #include @@ -14,33 +14,20 @@ static void do_hw_reset(void); -static int reset_gpio = -1; +static struct gpio_desc *reset_gpio; -int init_gpio_reset(int gpio, int output, int level) +int init_gpio_reset(int output, int level) { - int rc; - - rc = gpio_request(gpio, "reset generator"); - if (rc) { - printk(KERN_ERR "Can't request reset_gpio\n"); - goto out; + reset_gpio = gpiod_get(NULL, "reset generator", GPIOD_ASIS); + if (IS_ERR(reset_gpio)) { + pr_err("Can't request reset_gpio: %pe\n", reset_gpio); + return PTR_ERR(reset_gpio); } if (output) - rc = gpio_direction_output(gpio, level); + return gpiod_direction_output(reset_gpio, level); else - rc = gpio_direction_input(gpio); - if (rc) { - printk(KERN_ERR "Can't configure reset_gpio\n"); - gpio_free(gpio); - goto out; - } - -out: - if (!rc) - reset_gpio = gpio; - - return rc; + return gpiod_direction_input(reset_gpio); } /* @@ -50,16 +37,16 @@ int init_gpio_reset(int gpio, int output, int level) */ static void do_gpio_reset(void) { - BUG_ON(reset_gpio == -1); + BUG_ON(IS_ERR(reset_gpio)); /* drive it low */ - gpio_direction_output(reset_gpio, 0); + gpiod_direction_output(reset_gpio, 0); mdelay(2); /* rising edge or drive high */ - gpio_set_value(reset_gpio, 1); + gpiod_set_value(reset_gpio, 1); mdelay(2); /* falling edge */ - gpio_set_value(reset_gpio, 0); + gpiod_set_value(reset_gpio, 0); /* give it some time */ mdelay(10); diff --git a/arch/arm/mach-pxa/reset.h b/arch/arm/mach-pxa/reset.h index 963dd190bc13..5864f61a0e94 100644 --- a/arch/arm/mach-pxa/reset.h +++ b/arch/arm/mach-pxa/reset.h @@ -13,10 +13,9 @@ extern void pxa_register_wdt(unsigned int reset_status); /** * init_gpio_reset() - register GPIO as reset generator - * @gpio: gpio nr * @output: set gpio as output instead of input during normal work * @level: output level */ -extern int init_gpio_reset(int gpio, int output, int level); +extern int init_gpio_reset(int output, int level); #endif /* __ASM_ARCH_RESET_H */ diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c index 59a4a439e3d2..c789eeaf3c2c 100644 --- a/arch/arm/mach-pxa/spitz.c +++ b/arch/arm/mach-pxa/spitz.c @@ -1024,9 +1024,13 @@ static void spitz_restart(enum reboot_mode mode, const char *cmd) spitz_poweroff(); } +GPIO_LOOKUP_SINGLE(spitz_reset_gpio_table, NULL, "pxa-gpio", + SPITZ_GPIO_ON_RESET, "reset generator", GPIO_ACTIVE_HIGH); + static void __init spitz_init(void) { - init_gpio_reset(SPITZ_GPIO_ON_RESET, 1, 0); + gpiod_add_lookup_table(&spitz_reset_gpio_table); + init_gpio_reset(1, 0); pm_power_off = spitz_poweroff; PMCR = 0x00;