From patchwork Sun Dec 28 04:57:34 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Huacai Chen X-Patchwork-Id: 424292 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 0F7861400D2 for ; Sun, 28 Dec 2014 16:03:02 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751045AbaL1FC7 (ORCPT ); Sun, 28 Dec 2014 00:02:59 -0500 Received: from smtpbgau2.qq.com ([54.206.34.216]:47089 "EHLO smtpbgau2.qq.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750699AbaL1FC7 (ORCPT ); Sun, 28 Dec 2014 00:02:59 -0500 X-Greylist: delayed 302 seconds by postgrey-1.27 at vger.kernel.org; Sun, 28 Dec 2014 00:02:58 EST X-QQ-mid: bizesmtp7t1419742666t807t252 Received: from localhost.localdomain (unknown [222.92.8.142]) by esmtp4.qq.com (ESMTP) with id ; Sun, 28 Dec 2014 12:57:46 +0800 (CST) X-QQ-SSF: 01100000002000F0FI42B00A0000000 X-QQ-FEAT: bUTPB8/q2mjtXgueK7Fdv1ZMyTgEvhGPJEpi16GkJzndPzTPI2xvJBQUH2TrF Cvqq71RG9OfW7Zfjj0gUfPZxfGKdLzzYcqgWoVY68s+41vtfMKWErmC1drPaSbM/u/pMGWZ cDCStAFb9zK2YoWadbbTeeBZeSrEgqbXg66k73M/v9YaLLDpoDbBM4MYxnC3ofI3Ur3d3QS pOK6WcBvc/fvr3JmnczOzbkfVN62vNMmGjd50f8JZXw== X-QQ-GoodBg: 0 From: Huacai Chen To: Ralf Baechle Cc: John Crispin , "Steven J. Hill" , linux-mips@linux-mips.org, Fuxin Zhang , Zhangjin Wu , linux-gpio@vger.kernel.org, Huacai Chen Subject: [PATCH V6 5/8] GPIO: Add Loongson-3A/3B GPIO driver support Date: Sun, 28 Dec 2014 12:57:34 +0800 Message-Id: <1419742654-15094-3-git-send-email-chenhc@lemote.com> X-Mailer: git-send-email 1.7.7.3 In-Reply-To: <1419742654-15094-1-git-send-email-chenhc@lemote.com> References: <1419742654-15094-1-git-send-email-chenhc@lemote.com> X-QQ-SENDSIZE: 520 X-QQ-Bgrelay: 1 Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Improve Loongson-2's GPIO driver to support Loongson-3A/3B, and update Loongson-3's default config file. Signed-off-by: Huacai Chen --- arch/mips/Kconfig | 1 + arch/mips/configs/loongson3_defconfig | 1 + drivers/gpio/Kconfig | 6 ++-- drivers/gpio/gpio-loongson.c | 52 +++++++++++++++++++------------- 4 files changed, 36 insertions(+), 24 deletions(-) diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index b40b9f1..1600907 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -1236,6 +1236,7 @@ config CPU_LOONGSON3 select CPU_SUPPORTS_HUGEPAGES select WEAK_ORDERING select WEAK_REORDERING_BEYOND_LLSC + select ARCH_REQUIRE_GPIOLIB help The Loongson 3 processor implements the MIPS64R2 instruction set with many extensions. diff --git a/arch/mips/configs/loongson3_defconfig b/arch/mips/configs/loongson3_defconfig index 1c6191e..e7a9bb4 100644 --- a/arch/mips/configs/loongson3_defconfig +++ b/arch/mips/configs/loongson3_defconfig @@ -243,6 +243,7 @@ CONFIG_HW_RANDOM=y CONFIG_RAW_DRIVER=m CONFIG_I2C_CHARDEV=y CONFIG_I2C_PIIX4=y +CONFIG_GPIO_LOONGSON=y CONFIG_SENSORS_LM75=m CONFIG_SENSORS_LM93=m CONFIG_SENSORS_W83627HF=m diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 3ac5473..2e19f39 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -476,10 +476,10 @@ config GPIO_GRGPIO VHDL IP core library. config GPIO_LOONGSON - tristate "Loongson-2 GPIO support" - depends on CPU_LOONGSON2 + tristate "Loongson-2/3 GPIO support" + depends on CPU_LOONGSON2 || CPU_LOONGSON3 help - driver for GPIO functionality on Loongson-2F processors. + driver for GPIO functionality on Loongson-2F/3A/3B processors. config GPIO_TB10X bool diff --git a/drivers/gpio/gpio-loongson.c b/drivers/gpio/gpio-loongson.c index 087aac3..dc28354 100644 --- a/drivers/gpio/gpio-loongson.c +++ b/drivers/gpio/gpio-loongson.c @@ -1,8 +1,10 @@ /* - * STLS2F GPIO Support + * Loongson-2F/3A/3B GPIO Support * * Copyright (c) 2008 Richard Liu, STMicroelectronics * Copyright (c) 2008-2010 Arnaud Patard + * Copyright (c) 2013 Hongbing Hu + * Copyright (c) 2014 Huacai Chen * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -20,16 +22,24 @@ #include #define STLS2F_N_GPIO 4 -#define STLS2F_GPIO_IN_OFFSET 16 +#define STLS3A_N_GPIO 16 + +#ifdef CONFIG_CPU_LOONGSON3 +#define LOONGSON_N_GPIO STLS3A_N_GPIO +#else +#define LOONGSON_N_GPIO STLS2F_N_GPIO +#endif + +#define LOONGSON_GPIO_IN_OFFSET 16 static DEFINE_SPINLOCK(gpio_lock); -static int ls2f_gpio_direction_input(struct gpio_chip *chip, unsigned gpio) +static int loongson_gpio_direction_input(struct gpio_chip *chip, unsigned gpio) { u32 temp; u32 mask; - if (gpio >= STLS2F_N_GPIO) + if (gpio >= LOONGSON_N_GPIO) return -EINVAL; spin_lock(&gpio_lock); @@ -42,13 +52,13 @@ static int ls2f_gpio_direction_input(struct gpio_chip *chip, unsigned gpio) return 0; } -static int ls2f_gpio_direction_output(struct gpio_chip *chip, +static int loongson_gpio_direction_output(struct gpio_chip *chip, unsigned gpio, int level) { u32 temp; u32 mask; - if (gpio >= STLS2F_N_GPIO) + if (gpio >= LOONGSON_N_GPIO) return -EINVAL; gpio_set_value(gpio, level); @@ -62,15 +72,15 @@ static int ls2f_gpio_direction_output(struct gpio_chip *chip, return 0; } -static int ls2f_gpio_get_value(struct gpio_chip *chip, unsigned gpio) +static int loongson_gpio_get_value(struct gpio_chip *chip, unsigned gpio) { u32 val; u32 mask; - if (gpio >= STLS2F_N_GPIO) + if (gpio >= LOONGSON_N_GPIO) return __gpio_get_value(gpio); - mask = 1 << (gpio + STLS2F_GPIO_IN_OFFSET); + mask = 1 << (gpio + LOONGSON_GPIO_IN_OFFSET); spin_lock(&gpio_lock); val = LOONGSON_GPIODATA; spin_unlock(&gpio_lock); @@ -78,13 +88,13 @@ static int ls2f_gpio_get_value(struct gpio_chip *chip, unsigned gpio) return (val & mask) != 0; } -static void ls2f_gpio_set_value(struct gpio_chip *chip, +static void loongson_gpio_set_value(struct gpio_chip *chip, unsigned gpio, int value) { u32 val; u32 mask; - if (gpio >= STLS2F_N_GPIO) { + if (gpio >= LOONGSON_N_GPIO) { __gpio_set_value(gpio, value); return; } @@ -101,19 +111,19 @@ static void ls2f_gpio_set_value(struct gpio_chip *chip, spin_unlock(&gpio_lock); } -static struct gpio_chip ls2f_chip = { - .label = "ls2f", - .direction_input = ls2f_gpio_direction_input, - .get = ls2f_gpio_get_value, - .direction_output = ls2f_gpio_direction_output, - .set = ls2f_gpio_set_value, +static struct gpio_chip loongson_chip = { + .label = "Loongson-gpio-chip", + .direction_input = loongson_gpio_direction_input, + .get = loongson_gpio_get_value, + .direction_output = loongson_gpio_direction_output, + .set = loongson_gpio_set_value, .base = 0, - .ngpio = STLS2F_N_GPIO, + .ngpio = LOONGSON_N_GPIO, .can_sleep = false, }; -static int __init ls2f_gpio_setup(void) +static int __init loongson_gpio_setup(void) { - return gpiochip_add(&ls2f_chip); + return gpiochip_add(&loongson_chip); } -arch_initcall(ls2f_gpio_setup); +postcore_initcall(loongson_gpio_setup);