From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966304AbcKXPFK (ORCPT ); Thu, 24 Nov 2016 10:05:10 -0500 Received: from mail-wm0-f45.google.com ([74.125.82.45]:34876 "EHLO mail-wm0-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966278AbcKXPFE (ORCPT ); Thu, 24 Nov 2016 10:05:04 -0500 From: Axel Haslam To: nsekhar@ti.com, khilman@baylibre.com, ptitiano@baylibre.com Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Axel Haslam Subject: [PATCH v2 3/3] ARM: davinci: da830-evm: use gpio descriptor for mmc pins Date: Thu, 24 Nov 2016 16:04:54 +0100 Message-Id: <20161124150454.23899-4-ahaslam@baylibre.com> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20161124150454.23899-1-ahaslam@baylibre.com> References: <20161124150454.23899-1-ahaslam@baylibre.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Currently the mmc driver is polling the gpio to know if the card was removed. By using a gpio descriptor instead of the platform callbacks, the driver will be able to register the gpio using the mmc core API's designed for this purpose. This has the advantage that an irq will be registered, and polling is no longer needed. Also, a dependency on platform callbacks is removed for this board. Signed-off-by: Axel Haslam --- arch/arm/mach-davinci/board-da830-evm.c | 41 +++++++++------------------------ 1 file changed, 11 insertions(+), 30 deletions(-) diff --git a/arch/arm/mach-davinci/board-da830-evm.c b/arch/arm/mach-davinci/board-da830-evm.c index 5db0901..5807562 100644 --- a/arch/arm/mach-davinci/board-da830-evm.c +++ b/arch/arm/mach-davinci/board-da830-evm.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -204,22 +205,16 @@ static const short da830_evm_mmc_sd_pins[] = { -1 }; -#define DA830_MMCSD_WP_PIN GPIO_TO_PIN(2, 1) -#define DA830_MMCSD_CD_PIN GPIO_TO_PIN(2, 2) - -static int da830_evm_mmc_get_ro(int index) -{ - return gpio_get_value(DA830_MMCSD_WP_PIN); -} - -static int da830_evm_mmc_get_cd(int index) -{ - return !gpio_get_value(DA830_MMCSD_CD_PIN); -} +static struct gpiod_lookup_table mmc_gpios_table = { + .dev_id = "da830-mmc.0", + .table = { + /* gpio chip 1 contains gpio range 32-63 */ + GPIO_LOOKUP("davinci_gpio.1", 2, "cd", GPIO_ACTIVE_LOW), + GPIO_LOOKUP("davinci_gpio.1", 1, "wp", GPIO_ACTIVE_LOW), + }, +}; static struct davinci_mmc_config da830_evm_mmc_config = { - .get_ro = da830_evm_mmc_get_ro, - .get_cd = da830_evm_mmc_get_cd, .wires = 8, .max_freq = 50000000, .caps = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED, @@ -235,26 +230,12 @@ static inline void da830_evm_init_mmc(void) return; } - ret = gpio_request(DA830_MMCSD_WP_PIN, "MMC WP"); - if (ret) { - pr_warn("%s: can not open GPIO %d\n", - __func__, DA830_MMCSD_WP_PIN); - return; - } - gpio_direction_input(DA830_MMCSD_WP_PIN); - - ret = gpio_request(DA830_MMCSD_CD_PIN, "MMC CD\n"); - if (ret) { - pr_warn("%s: can not open GPIO %d\n", - __func__, DA830_MMCSD_CD_PIN); - return; - } - gpio_direction_input(DA830_MMCSD_CD_PIN); + gpiod_add_lookup_table(&mmc_gpios_table); ret = da8xx_register_mmcsd0(&da830_evm_mmc_config); if (ret) { pr_warn("%s: mmc/sd registration failed: %d\n", __func__, ret); - gpio_free(DA830_MMCSD_WP_PIN); + gpiod_remove_lookup_table(&mmc_gpios_table); } } -- 2.9.3 From mboxrd@z Thu Jan 1 00:00:00 1970 From: ahaslam@baylibre.com (Axel Haslam) Date: Thu, 24 Nov 2016 16:04:54 +0100 Subject: [PATCH v2 3/3] ARM: davinci: da830-evm: use gpio descriptor for mmc pins In-Reply-To: <20161124150454.23899-1-ahaslam@baylibre.com> References: <20161124150454.23899-1-ahaslam@baylibre.com> Message-ID: <20161124150454.23899-4-ahaslam@baylibre.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Currently the mmc driver is polling the gpio to know if the card was removed. By using a gpio descriptor instead of the platform callbacks, the driver will be able to register the gpio using the mmc core API's designed for this purpose. This has the advantage that an irq will be registered, and polling is no longer needed. Also, a dependency on platform callbacks is removed for this board. Signed-off-by: Axel Haslam --- arch/arm/mach-davinci/board-da830-evm.c | 41 +++++++++------------------------ 1 file changed, 11 insertions(+), 30 deletions(-) diff --git a/arch/arm/mach-davinci/board-da830-evm.c b/arch/arm/mach-davinci/board-da830-evm.c index 5db0901..5807562 100644 --- a/arch/arm/mach-davinci/board-da830-evm.c +++ b/arch/arm/mach-davinci/board-da830-evm.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -204,22 +205,16 @@ static const short da830_evm_mmc_sd_pins[] = { -1 }; -#define DA830_MMCSD_WP_PIN GPIO_TO_PIN(2, 1) -#define DA830_MMCSD_CD_PIN GPIO_TO_PIN(2, 2) - -static int da830_evm_mmc_get_ro(int index) -{ - return gpio_get_value(DA830_MMCSD_WP_PIN); -} - -static int da830_evm_mmc_get_cd(int index) -{ - return !gpio_get_value(DA830_MMCSD_CD_PIN); -} +static struct gpiod_lookup_table mmc_gpios_table = { + .dev_id = "da830-mmc.0", + .table = { + /* gpio chip 1 contains gpio range 32-63 */ + GPIO_LOOKUP("davinci_gpio.1", 2, "cd", GPIO_ACTIVE_LOW), + GPIO_LOOKUP("davinci_gpio.1", 1, "wp", GPIO_ACTIVE_LOW), + }, +}; static struct davinci_mmc_config da830_evm_mmc_config = { - .get_ro = da830_evm_mmc_get_ro, - .get_cd = da830_evm_mmc_get_cd, .wires = 8, .max_freq = 50000000, .caps = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED, @@ -235,26 +230,12 @@ static inline void da830_evm_init_mmc(void) return; } - ret = gpio_request(DA830_MMCSD_WP_PIN, "MMC WP"); - if (ret) { - pr_warn("%s: can not open GPIO %d\n", - __func__, DA830_MMCSD_WP_PIN); - return; - } - gpio_direction_input(DA830_MMCSD_WP_PIN); - - ret = gpio_request(DA830_MMCSD_CD_PIN, "MMC CD\n"); - if (ret) { - pr_warn("%s: can not open GPIO %d\n", - __func__, DA830_MMCSD_CD_PIN); - return; - } - gpio_direction_input(DA830_MMCSD_CD_PIN); + gpiod_add_lookup_table(&mmc_gpios_table); ret = da8xx_register_mmcsd0(&da830_evm_mmc_config); if (ret) { pr_warn("%s: mmc/sd registration failed: %d\n", __func__, ret); - gpio_free(DA830_MMCSD_WP_PIN); + gpiod_remove_lookup_table(&mmc_gpios_table); } } -- 2.9.3