From patchwork Fri Oct 6 13:44:28 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: 13411623 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 19D48E81E0A for ; Fri, 6 Oct 2023 13:45:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232482AbjJFNpS (ORCPT ); Fri, 6 Oct 2023 09:45:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34140 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232473AbjJFNpR (ORCPT ); Fri, 6 Oct 2023 09:45:17 -0400 Received: from mx.skole.hr (mx2.hosting.skole.hr [161.53.165.186]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8A60FAC; Fri, 6 Oct 2023 06:45:15 -0700 (PDT) Received: from mx2.hosting.skole.hr (localhost.localdomain [127.0.0.1]) by mx.skole.hr (mx.skole.hr) with ESMTP id 2E06083F6E; Fri, 6 Oct 2023 15:45:14 +0200 (CEST) From: =?utf-8?q?Duje_Mihanovi=C4=87?= Date: Fri, 06 Oct 2023 15:44:28 +0200 Subject: [PATCH RFT v6 4/6] ARM: pxa: Convert reset driver to GPIO descriptors MIME-Version: 1.0 Message-Id: <20231006-pxa-gpio-v6-4-981b4910d599@skole.hr> References: <20231006-pxa-gpio-v6-0-981b4910d599@skole.hr> In-Reply-To: <20231006-pxa-gpio-v6-0-981b4910d599@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_Miha?= =?utf-8?q?novi=C4=87?= , Bartosz Golaszewski X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=3701; i=duje.mihanovic@skole.hr; h=from:subject:message-id; bh=RO2FS16ccP9uEgSE5MIe1I+a1oRlIzxtkclTF982Y30=; b=owEBbQKS/ZANAwAIAZoRnrBCLZbhAcsmYgBlIA9dOFfYP80i5cCQEO2634FMtl0J7UbyJqQJb 160ZfaVayyJAjMEAAEIAB0WIQRT351NnD/hEPs2LXiaEZ6wQi2W4QUCZSAPXQAKCRCaEZ6wQi2W 4U4RD/9Fu4Xbkc5jhMwxez0QwhXDRlnBMS/ii5bFd5z8xv9VlbczdUdSHZjlhvntd+DDteI/d63 tThg7WMb2UZ+P3TwjR1g8Gd58lZQ0S6nASfACceHfzt9P89ERhMp4UpCYBbofI0wbKJupnaJGP4 3EraXQjqv6Pechea2UT6wHWiU+909yeC+kpAh/7PzK39hIBvhNjIYilzyQI+b903Y0r9IAcqKRr fFR85oXytHv7gPRG0GKG4Hi2bmJ6sM31gy66JsMZxW3Q98km6MgnlTIWUUoj5BsjytuZ1hhrxb2 Qe/eYfB1pAidQejHAtM3BbVgRtKC/TbDsUOo6GJr2N67asS3as6/v20uMEXKYpdKreYWSBjF2Kw U0bcxT0whn4FQWGzg9S9tOzAoGwmCSHmU57/NEwUIr7EvimizLRMqa0IlXhiKyqFXuZY8gPjYYX EWX2+Linv6UlBW9o58PhXsGjJbJ77bgXn7XMURrnVaOYNxZei6NlErsPKcogqyPlx9+Q7MRHpmP XSwDH282WpsvY7rAv6AvdmZuKBwmncLuhFctpY6/Bs0/08y0tX7/Kj8aZtZtSOtaaRBJrG1YIBG aGIW24N/nJXqn6f7pvSvPiAYsuE6df9I8XWDzsN29R8ih4ByYXfgEXwVulvFd5njIFwFpPfgc7v pMBuVazxRt+0WNw== X-Developer-Key: i=duje.mihanovic@skole.hr; a=openpgp; fpr=53DF9D4D9C3FE110FB362D789A119EB0422D96E1 Precedence: bulk List-ID: X-Mailing-List: linux-spi@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 Reviewed-by: Bartosz Golaszewski 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..08bc104b9411 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", 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 8e9301cd0c93..554a4b9782c5 100644 --- a/arch/arm/mach-pxa/spitz.c +++ b/arch/arm/mach-pxa/spitz.c @@ -1026,9 +1026,13 @@ 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", 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;