From patchwork Tue Feb 7 14:29:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 651415 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 E4713C636CD for ; Tue, 7 Feb 2023 14:31:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231465AbjBGObG (ORCPT ); Tue, 7 Feb 2023 09:31:06 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44618 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232915AbjBGOaX (ORCPT ); Tue, 7 Feb 2023 09:30:23 -0500 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A775D900B; Tue, 7 Feb 2023 06:29:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1675780183; x=1707316183; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=kEzy7E5g++11ZfX8PhOrp7wyzba5U4Amo9sCg/uj/Rc=; b=c6Uj10hmRQwq4u9b0/L4BMIFMzGAbbZ8sIyk3NkwFEporJJD5EOVlOpX 35N5wibZoGoXW66Vy2Wnlhb1l/6pdG5FjCisReLksZr84R3VoiKhPvcdG kvfzdt8+44Lmqxcp6859WjJk31dWTU88r8+oRKhmvixj/csaVEzjfjvPo jW0R4eJPodbPtHCoCNmsSKD4mA6PqmtdDXNLzUOQGSgeazbzAX79/e9AC 5Dxfog35ny+Y5vR8a3sX1Z/sgQ0adKD+M2XKZb0f8+N7MwAIccQ0QkFyD WH3dHdJv5BtZV9zahL564dM3akH2QN18zhtPfSRPPOMakpjlwLZk2IUMs g==; X-IronPort-AV: E=McAfee;i="6500,9779,10614"; a="313163944" X-IronPort-AV: E=Sophos;i="5.97,278,1669104000"; d="scan'208";a="313163944" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Feb 2023 06:29:40 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10614"; a="644465276" X-IronPort-AV: E=Sophos;i="5.97,278,1669104000"; d="scan'208";a="644465276" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga006.jf.intel.com with ESMTP; 07 Feb 2023 06:29:36 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id 94945380; Tue, 7 Feb 2023 16:30:02 +0200 (EET) From: Andy Shevchenko To: Andy Shevchenko , Linus Walleij , Arnd Bergmann , Bartosz Golaszewski , Tony Lindgren , Thomas Gleixner , Krzysztof Kozlowski , Geert Uytterhoeven , Christophe Leroy , Michael Ellerman , Devarsh Thakkar , Dmitry Torokhov , Stefan Schmidt , Miquel Raynal , linux-gpio@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc-tw-discuss@lists.sourceforge.net, linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linuxppc-dev@lists.ozlabs.org, linux-sh@vger.kernel.org, linux-acpi@vger.kernel.org, linux-input@vger.kernel.org, linux-media@vger.kernel.org, linux-wpan@vger.kernel.org, netdev@vger.kernel.org, linux-wireless@vger.kernel.org, brcm80211-dev-list.pdl@broadcom.com, SHA-cyfmac-dev-list@infineon.com, linux-arch@vger.kernel.org, devicetree@vger.kernel.org Cc: Bartosz Golaszewski , Jonathan Corbet , Alex Shi , Yanteng Si , Hu Haowen , Russell King , Aaro Koskinen , Janusz Krzysztofik , Andrew Lunn , Sebastian Hesselbarth , Gregory Clement , Alim Akhtar , Nicholas Piggin , Yoshinori Sato , Rich Felker , Mun Yew Tham , Keerthy , Mika Westerberg , Mauro Carvalho Chehab , Alexander Aring , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Arend van Spriel , Franky Lin , Hante Meuleman , Kalle Valo , Qiang Zhao , Li Yang , Lee Jones , Rob Herring , Frank Rowand Subject: [PATCH v3 07/12] gpiolib: split of_mm_gpio_chip out of linux/of_gpio.h Date: Tue, 7 Feb 2023 16:29:47 +0200 Message-Id: <20230207142952.51844-8-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230207142952.51844-1-andriy.shevchenko@linux.intel.com> References: <20230207142952.51844-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Arnd Bergmann This is a rarely used feature that has nothing to do with the client-side of_gpio.h. Split it out with a separate header file and Kconfig option so it can be removed on its own timeline aside from removing the of_gpio consumer interfaces. Reviewed-by: Andy Shevchenko Signed-off-by: Arnd Bergmann Reviewed-by: Linus Walleij Signed-off-by: Andy Shevchenko --- arch/powerpc/platforms/44x/Kconfig | 1 + arch/powerpc/platforms/4xx/gpio.c | 2 +- arch/powerpc/platforms/8xx/Kconfig | 1 + arch/powerpc/platforms/8xx/cpm1.c | 2 +- arch/powerpc/platforms/Kconfig | 2 ++ arch/powerpc/sysdev/cpm_common.c | 2 +- drivers/gpio/Kconfig | 11 +++++++ drivers/gpio/TODO | 15 ++++++--- drivers/gpio/gpio-altera.c | 2 +- drivers/gpio/gpio-mm-lantiq.c | 2 +- drivers/gpio/gpio-mpc5200.c | 2 +- drivers/gpio/gpiolib-of.c | 3 ++ drivers/soc/fsl/qe/gpio.c | 2 +- .../legacy-of-mm-gpiochip.h} | 33 +++---------------- include/linux/of_gpio.h | 21 ------------ 15 files changed, 40 insertions(+), 61 deletions(-) copy include/linux/{of_gpio.h => gpio/legacy-of-mm-gpiochip.h} (50%) diff --git a/arch/powerpc/platforms/44x/Kconfig b/arch/powerpc/platforms/44x/Kconfig index 25b80cd558f8..1624ebf95497 100644 --- a/arch/powerpc/platforms/44x/Kconfig +++ b/arch/powerpc/platforms/44x/Kconfig @@ -230,6 +230,7 @@ config PPC4xx_GPIO bool "PPC4xx GPIO support" depends on 44x select GPIOLIB + select OF_GPIO_MM_GPIOCHIP help Enable gpiolib support for ppc440 based boards diff --git a/arch/powerpc/platforms/4xx/gpio.c b/arch/powerpc/platforms/4xx/gpio.c index 49ee8d365852..e5f2319e5cbe 100644 --- a/arch/powerpc/platforms/4xx/gpio.c +++ b/arch/powerpc/platforms/4xx/gpio.c @@ -14,7 +14,7 @@ #include #include #include -#include +#include #include #include #include diff --git a/arch/powerpc/platforms/8xx/Kconfig b/arch/powerpc/platforms/8xx/Kconfig index 60cc5b537a98..a14d9d8997a4 100644 --- a/arch/powerpc/platforms/8xx/Kconfig +++ b/arch/powerpc/platforms/8xx/Kconfig @@ -101,6 +101,7 @@ comment "Generic MPC8xx Options" config 8xx_GPIO bool "GPIO API Support" select GPIOLIB + select OF_GPIO_MM_GPIOCHIP help Saying Y here will cause the ports on an MPC8xx processor to be used with the GPIO API. If you say N here, the kernel needs less memory. diff --git a/arch/powerpc/platforms/8xx/cpm1.c b/arch/powerpc/platforms/8xx/cpm1.c index bb38c8d8f8de..56ca14f77543 100644 --- a/arch/powerpc/platforms/8xx/cpm1.c +++ b/arch/powerpc/platforms/8xx/cpm1.c @@ -44,7 +44,7 @@ #include #ifdef CONFIG_8xx_GPIO -#include +#include #endif #define CPM_MAP_SIZE (0x4000) diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig index d41dad227de8..8e4bbd19dec5 100644 --- a/arch/powerpc/platforms/Kconfig +++ b/arch/powerpc/platforms/Kconfig @@ -244,6 +244,7 @@ config QE_GPIO bool "QE GPIO support" depends on QUICC_ENGINE select GPIOLIB + select OF_GPIO_MM_GPIOCHIP help Say Y here if you're going to use hardware that connects to the QE GPIOs. @@ -254,6 +255,7 @@ config CPM2 select CPM select HAVE_PCI select GPIOLIB + select OF_GPIO_MM_GPIOCHIP help The CPM2 (Communications Processor Module) is a coprocessor on embedded CPUs made by Freescale. Selecting this option means that diff --git a/arch/powerpc/sysdev/cpm_common.c b/arch/powerpc/sysdev/cpm_common.c index 7dc1960f8bdb..8234013a8772 100644 --- a/arch/powerpc/sysdev/cpm_common.c +++ b/arch/powerpc/sysdev/cpm_common.c @@ -31,7 +31,7 @@ #include #if defined(CONFIG_CPM2) || defined(CONFIG_8xx_GPIO) -#include +#include #endif static int __init cpm_init(void) diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 06a268d56800..178025ca3b34 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -39,6 +39,14 @@ config GPIOLIB_IRQCHIP select IRQ_DOMAIN bool +config OF_GPIO_MM_GPIOCHIP + bool + help + This adds support for the legacy 'struct of_mm_gpio_chip' interface + from PowerPC. Existing drivers using this interface need to select + this symbol, but new drivers should use the generic gpio-regmap + infrastructure instead. + config DEBUG_GPIO bool "Debug GPIO calls" depends on DEBUG_KERNEL @@ -131,6 +139,7 @@ config GPIO_ALTERA tristate "Altera GPIO" depends on OF_GPIO select GPIOLIB_IRQCHIP + select OF_GPIO_MM_GPIOCHIP help Say Y or M here to build support for the Altera PIO device. @@ -403,6 +412,7 @@ config GPIO_MENZ127 config GPIO_MM_LANTIQ bool "Lantiq Memory mapped GPIOs" depends on LANTIQ && SOC_XWAY + select OF_GPIO_MM_GPIOCHIP help This enables support for memory mapped GPIOs on the External Bus Unit (EBU) found on Lantiq SoCs. The GPIOs are output only as they are @@ -411,6 +421,7 @@ config GPIO_MM_LANTIQ config GPIO_MPC5200 def_bool y depends on PPC_MPC52xx + select OF_GPIO_MM_GPIOCHIP config GPIO_MPC8XXX bool "MPC512x/MPC8xxx/QorIQ GPIO support" diff --git a/drivers/gpio/TODO b/drivers/gpio/TODO index 68ada1066941..189c3abe7e79 100644 --- a/drivers/gpio/TODO +++ b/drivers/gpio/TODO @@ -59,11 +59,6 @@ the device tree back-end. It is legacy and should not be used in new code. Work items: -- Get rid of struct of_mm_gpio_chip altogether: use the generic MMIO - GPIO for all current users (see below). Delete struct of_mm_gpio_chip, - to_of_mm_gpio_chip(), of_mm_gpiochip_add_data(), of_mm_gpiochip_remove() - from the kernel. - - Change all consumer drivers that #include to #include and stop doing custom parsing of the GPIO lines from the device tree. This can be tricky and often ivolves @@ -81,6 +76,16 @@ Work items: uses or instead. +Get rid of + +Work items: + +- Get rid of struct of_mm_gpio_chip altogether: use the generic MMIO + GPIO for all current users (see below). Delete struct of_mm_gpio_chip, + to_of_mm_gpio_chip(), of_mm_gpiochip_add_data(), of_mm_gpiochip_remove(), + CONFIG_OF_GPIO_MM_GPIOCHIP from the kernel. + + Get rid of This legacy header is a one stop shop for anything GPIO is closely tied diff --git a/drivers/gpio/gpio-altera.c b/drivers/gpio/gpio-altera.c index b59fae993626..99e137f8097e 100644 --- a/drivers/gpio/gpio-altera.c +++ b/drivers/gpio/gpio-altera.c @@ -7,7 +7,7 @@ #include #include #include -#include /* For of_mm_gpio_chip */ +#include #include #define ALTERA_GPIO_MAX_NGPIO 32 diff --git a/drivers/gpio/gpio-mm-lantiq.c b/drivers/gpio/gpio-mm-lantiq.c index 538e31fe8903..27ff84c5d162 100644 --- a/drivers/gpio/gpio-mm-lantiq.c +++ b/drivers/gpio/gpio-mm-lantiq.c @@ -10,8 +10,8 @@ #include #include #include +#include #include -#include #include #include diff --git a/drivers/gpio/gpio-mpc5200.c b/drivers/gpio/gpio-mpc5200.c index 000494e0c533..3b0bfff8c778 100644 --- a/drivers/gpio/gpio-mpc5200.c +++ b/drivers/gpio/gpio-mpc5200.c @@ -8,7 +8,7 @@ #include #include #include -#include +#include #include #include #include diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c index 266352b1a966..0f699af438b0 100644 --- a/drivers/gpio/gpiolib-of.c +++ b/drivers/gpio/gpiolib-of.c @@ -892,6 +892,8 @@ static int of_gpio_simple_xlate(struct gpio_chip *gc, return gpiospec->args[0]; } +#if IS_ENABLED(CONFIG_OF_GPIO_MM_GPIOCHIP) +#include /** * of_mm_gpiochip_add_data - Add memory mapped GPIO chip (bank) * @np: device node of the GPIO chip @@ -964,6 +966,7 @@ void of_mm_gpiochip_remove(struct of_mm_gpio_chip *mm_gc) kfree(gc->label); } EXPORT_SYMBOL_GPL(of_mm_gpiochip_remove); +#endif #ifdef CONFIG_PINCTRL static int of_gpiochip_add_pin_range(struct gpio_chip *chip) diff --git a/drivers/soc/fsl/qe/gpio.c b/drivers/soc/fsl/qe/gpio.c index 1c41eb49d5a7..3ef24ba0245b 100644 --- a/drivers/soc/fsl/qe/gpio.c +++ b/drivers/soc/fsl/qe/gpio.c @@ -13,7 +13,7 @@ #include #include #include -#include /* for of_mm_gpio_chip */ +#include #include #include #include diff --git a/include/linux/of_gpio.h b/include/linux/gpio/legacy-of-mm-gpiochip.h similarity index 50% copy from include/linux/of_gpio.h copy to include/linux/gpio/legacy-of-mm-gpiochip.h index 5d58b3b0a97e..2e2bd3b19cc3 100644 --- a/include/linux/of_gpio.h +++ b/include/linux/gpio/legacy-of-mm-gpiochip.h @@ -1,26 +1,19 @@ /* SPDX-License-Identifier: GPL-2.0+ */ /* - * OF helpers for the GPIO API + * OF helpers for the old of_mm_gpio_chip, used on ppc32 and nios2, + * do not use in new code. * * Copyright (c) 2007-2008 MontaVista Software, Inc. * * Author: Anton Vorontsov */ -#ifndef __LINUX_OF_GPIO_H -#define __LINUX_OF_GPIO_H +#ifndef __LINUX_GPIO_LEGACY_OF_MM_GPIO_CHIP_H +#define __LINUX_GPIO_LEGACY_OF_MM_GPIO_CHIP_H -#include #include -#include /* FIXME: Shouldn't be here */ #include -struct device_node; - -#ifdef CONFIG_OF_GPIO - -#include - /* * OF GPIO chip for memory mapped banks */ @@ -35,25 +28,9 @@ static inline struct of_mm_gpio_chip *to_of_mm_gpio_chip(struct gpio_chip *gc) return container_of(gc, struct of_mm_gpio_chip, gc); } -extern int of_get_named_gpio(const struct device_node *np, - const char *list_name, int index); - extern int of_mm_gpiochip_add_data(struct device_node *np, struct of_mm_gpio_chip *mm_gc, void *data); extern void of_mm_gpiochip_remove(struct of_mm_gpio_chip *mm_gc); -#else /* CONFIG_OF_GPIO */ - -#include - -/* Drivers may not strictly depend on the GPIO support, so let them link. */ -static inline int of_get_named_gpio(const struct device_node *np, - const char *propname, int index) -{ - return -ENOSYS; -} - -#endif /* CONFIG_OF_GPIO */ - -#endif /* __LINUX_OF_GPIO_H */ +#endif /* __LINUX_GPIO_LEGACY_OF_MM_GPIO_CHIP_H */ diff --git a/include/linux/of_gpio.h b/include/linux/of_gpio.h index 5d58b3b0a97e..d0f66a5e1b2a 100644 --- a/include/linux/of_gpio.h +++ b/include/linux/of_gpio.h @@ -19,30 +19,9 @@ struct device_node; #ifdef CONFIG_OF_GPIO -#include - -/* - * OF GPIO chip for memory mapped banks - */ -struct of_mm_gpio_chip { - struct gpio_chip gc; - void (*save_regs)(struct of_mm_gpio_chip *mm_gc); - void __iomem *regs; -}; - -static inline struct of_mm_gpio_chip *to_of_mm_gpio_chip(struct gpio_chip *gc) -{ - return container_of(gc, struct of_mm_gpio_chip, gc); -} - extern int of_get_named_gpio(const struct device_node *np, const char *list_name, int index); -extern int of_mm_gpiochip_add_data(struct device_node *np, - struct of_mm_gpio_chip *mm_gc, - void *data); -extern void of_mm_gpiochip_remove(struct of_mm_gpio_chip *mm_gc); - #else /* CONFIG_OF_GPIO */ #include