From patchwork Wed Oct 4 14:56:28 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: 13408868 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 6B3EB18E0E for ; Wed, 4 Oct 2023 14:56:51 +0000 (UTC) Received: from mx.skole.hr (mx2.hosting.skole.hr [161.53.165.186]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BC7B4BF; Wed, 4 Oct 2023 07:56:47 -0700 (PDT) Received: from mx2.hosting.skole.hr (localhost.localdomain [127.0.0.1]) by mx.skole.hr (mx.skole.hr) with ESMTP id 3DC5386058; Wed, 4 Oct 2023 16:56:46 +0200 (CEST) From: =?utf-8?q?Duje_Mihanovi=C4=87?= Date: Wed, 04 Oct 2023 16:56:28 +0200 Subject: [PATCH RFC v5 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: <20231004-pxa-gpio-v5-4-d99ae6fceea8@skole.hr> References: <20231004-pxa-gpio-v5-0-d99ae6fceea8@skole.hr> In-Reply-To: <20231004-pxa-gpio-v5-0-d99ae6fceea8@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=3634; i=duje.mihanovic@skole.hr; h=from:subject:message-id; bh=4NSf6nRqHgAPG1WiwL6ByRFscIsi1iq6bpWNwCWgJcw=; b=owEBbQKS/ZANAwAIAZoRnrBCLZbhAcsmYgBlHX0kIsnU2yb6NQa+JLbqEVhjjtHyHIfpuJ/1/ v5rjuAT98qJAjMEAAEIAB0WIQRT351NnD/hEPs2LXiaEZ6wQi2W4QUCZR19JAAKCRCaEZ6wQi2W 4fKkD/4lUF/j1aNfU/G+nduzIgzW2XaU0QH3T8Jn+YAS/8GW1LPFo0hc6CCIAZ29U/h+WJHTIeO hC/wabf33OODy1Bz06PDGKP2DLehHtSWZ9IRQbhzal7vp27zSp4RXG0MwJe8laVLi66w7cE1aLA w1ciX7zv0QhwyryD4jE0lnFiE0qWWz+M6Y15k4CEZqV3i0SDKh/Gad1yf9XFQ0IlwulBfbjezg8 5fHnkG+S0UHGO9U89hcy0pNQxjtw77K6BHYL0L9MqpcZQeJoCRQhS141AypHEAB+dkLR3D6+LxJ 8Jrj4V6RVGAj5LDtzzhbohULqYd5OE/LrXSUk11FD/d1nwg4NUnPTFwFlKuLcnOsyiryxa6R2D6 rHxb/Pt4zXGfD2uOXPV/rGlIuq7Bv7FGVwGyCY2LqzCarYx+xynZh9kp+I9dfSY0tS1OkOFSRfj PjDDGUEXuCQmwwhZ8Y0IUKBpUqbfOVQYoM9VDWfIyvRk1H+qilvOrZ5Zq+xhqo5sLKzGYZGOOLb yyTKm7W3gMGISp7u+oqyl99S64Fl3k36tD5gII75Sto07s88bKCgP8re1DtqJVxGBmIEZD1D/AW CHrz7ODutoD/WS3HhXNsfHkFhsLO+21fKQR1inJLknDTYdkIQ0tLZNRQDNLjyQkVtuhkgY5OC5/ vVD9oUNhdDxDklw== 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 Reviewed-by: Bartosz Golaszewski --- 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 965354e64c68..26ec29c9cd1b 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", 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;