From patchwork Sun Oct 1 14:12:55 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: 13405394 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 53316171DE for ; Sun, 1 Oct 2023 14:13:06 +0000 (UTC) Received: from mx.skole.hr (mx2.hosting.skole.hr [161.53.165.186]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5BEE7B4; Sun, 1 Oct 2023 07:13:05 -0700 (PDT) Received: from mx2.hosting.skole.hr (localhost.localdomain [127.0.0.1]) by mx.skole.hr (mx.skole.hr) with ESMTP id DC05382D29; Sun, 1 Oct 2023 16:13:03 +0200 (CEST) From: =?utf-8?q?Duje_Mihanovi=C4=87?= Date: Sun, 01 Oct 2023 16:12:55 +0200 Subject: [PATCH RFC v4 4/6] ARM: pxa: Convert reset driver to GPIO descriptors 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-v4-4-0f3b975e6ed5@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=3654; i=duje.mihanovic@skole.hr; h=from:subject:message-id; bh=/5RS07oDLTRM3lgyYG7tk3xbGzkj5Cj8vfkuDyb1HJU=; b=owEBbQKS/ZANAwAIAZoRnrBCLZbhAcsmYgBlGX5oQcyjQR6JAF0y/zmQk3Z8t5h4+yoRN+M4i PYHyqTY3eWJAjMEAAEIAB0WIQRT351NnD/hEPs2LXiaEZ6wQi2W4QUCZRl+aAAKCRCaEZ6wQi2W 4aiyEACQLJHgTkUAExmrwUOYfsqTHZPOmxL50sd8zf5DPeL5KfPskdb+IC3mVz4bfKlqoEppanD 1q3MXyiXNSU3pyquUiOcOoVzn8nIKHfy5iN7fBiq9VA7TePKJRSOmv2pM1bdDmQP+nsD3V2F7RL Dkwk2G1jnlXwgsOmfQeuP1bdR4sgJJtlqDQDpe/be3yClQ5wqvo2A4Pggxsof6NYhDa/K5wheCL vjn36qYxcmU++1prFzEeFMnxaWuAiZPCVM0X9jcgpmuE7sowlaOjkctODIAOLZWB/uFF0ZpCcZr Nml9gKI0cDb6BEjGqczHu4f2Bdn87FmNJhmGtOt1JVzVRDWbquWU2LUWCcbdqY78OffRWjqwgnP 97tdLJwNmovVflsn/z2Tu34q450alWc/x+0U4r9loZctjXMCWwV6SonjfKNNCuGLQJZq5gMXkSN 1zE2Ul9/cf2508SjcDmzhXzd3A2RW/B4TDhdmgJvmioejxnv3c95sq1Qx4OU+vqxL9XbZzd0fVx ciKRY8b4NsKu1MA8gThDJnEtv3/fgDy7SyLw0ADrmDHa3nBEBj4xYy6hZLGGv07vy3BbqEoiReE Lb6InZzJPiaK9FBaLYNXesQ5I7kVc6eg4H4vGkCpK3nk3BoNXpt6qmnUwhCD2NVwvf5ncG48gaf Hgt93S+vaVBsV1w== 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 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 965354e64c68..701fba130ac4 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;