From patchwork Mon Mar 28 14:58:24 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Wahren X-Patchwork-Id: 602504 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 3qYcWw6CfSz9sBf for ; Tue, 29 Mar 2016 01:59:56 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753562AbcC1O7z (ORCPT ); Mon, 28 Mar 2016 10:59:55 -0400 Received: from mout.kundenserver.de ([217.72.192.73]:65124 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752386AbcC1O7z (ORCPT ); Mon, 28 Mar 2016 10:59:55 -0400 Received: from localhost.localdomain ([95.91.39.67]) by mrelayeu.kundenserver.de (mreue103) with ESMTPSA (Nemesis) id 0LfGuG-1Zw9qY1e4e-00on7n; Mon, 28 Mar 2016 16:58:46 +0200 From: Stefan Wahren To: Linus Walleij , Stephen Warren , Lee Jones , Eric Anholt Cc: linux-gpio@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Stefan Wahren Subject: [PATCH] pinctrl: bcm2835: Implement get_direction callback Date: Mon, 28 Mar 2016 14:58:24 +0000 Message-Id: <1459177104-24353-1-git-send-email-stefan.wahren@i2se.com> X-Mailer: git-send-email 1.7.9.5 X-Provags-ID: V03:K0:ShsXxWChUmPt6i+5NG4tK6nIOGzgnzoYwMWZM0pt0Y5LIMXf0kr qU3zBOJoJH9bsfo1b5r+0jfeN2C8iShzVBZcoGQnVGdRYPMiSZmUAr6v1aYHM2roHcR2Tnw jMRGWb2U6sjN0FSeoACtElhjk7DrxS1BS3+o/P4E/iTb1dCR0sOBVNkluzQtXEQKhotw+1d t7n4Vrkthr3apOEngDBEw== X-UI-Out-Filterresults: notjunk:1; V01:K0:ozr9Ut3nYYA=:TCEuKyU+CnIbyiI0hbJhSI vb8jJ76RiBkR1sltE0SnzW/LJj4qOqTonCDWVvO2Ds5b1ryXQ5sIzuCfaGTiVvHb7yjztpnXu N3pq6KAKJn1Z5ip3/v6+zYybEuzjIBZigheOJuaqFHzN75naig2rgfsER8XDM8STK2LUm/lTD 8iEik0o8XWxppklMqfAFaTXAo5EBlguDVYVi2OzwaH9OSWwasbtNlm8F/sKW8ds2kauD/VMHl eOgjYWPnYItPNxAr5YErMm06Uu6d03p4AC+HLPti9r6eZ3s1UmDyOh0pYUKRb2O4QqUwuI0mG 0dH7Seq5M2qSWXOcZxz1aGRnixJ3EU48kL9pOUFTFV4lffIQfYRR8J7EMDZQacgdxdMuTMUZD 8IEITEfAmtcqIUtPSU6osCkrMUqz2e9msS4ToP8GQwWvLVPDDU6b/KHcikbTecbVDXGumxbGH Z2X+wEN2J14tClDRhB0GdVJ6SRKeUnIv5DpIL7kdO55EVTQxKtfXalDcFrvhcuWvro9MFnW3P O6nq7n3ecnydA1sxPMjcTRSCKY3YY5SMSv5xLNzx0upOzkXm1EmK19hWFBgQptSHVzcxE4f56 PgYqA2GoHa+ZoQlWYs9nyiFumIYJ2AyYFafQBrtvE67fTl8lcUrXdXqvgtKKBYxcmNnLJRD8a Wuy9g6U6/uU+oIRp3uKI45zz8T8QqQm2/i/1sRSSIkQDcQSowZshGTh9Mehq4z5RRhSk= Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Implement gpio_chip's get_direction() callback, that lets other drivers get particular GPIOs direction using gpiod_get_direction(). Signed-off-by: Stefan Wahren Reviewed-by: Eric Anholt Reviewed-by: Stephen Warren --- drivers/pinctrl/bcm/pinctrl-bcm2835.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/pinctrl/bcm/pinctrl-bcm2835.c b/drivers/pinctrl/bcm/pinctrl-bcm2835.c index 08b1d93..dd8b174 100644 --- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c +++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c @@ -342,6 +342,18 @@ static int bcm2835_gpio_get(struct gpio_chip *chip, unsigned offset) return bcm2835_gpio_get_bit(pc, GPLEV0, offset); } +static int bcm2835_gpio_get_direction(struct gpio_chip *chip, unsigned int offset) +{ + struct bcm2835_pinctrl *pc = gpiochip_get_data(chip); + enum bcm2835_fsel fsel = bcm2835_pinctrl_fsel_get(pc, offset); + + /* Alternative function doesn't clearly provide a direction */ + if (fsel > BCM2835_FSEL_GPIO_OUT) + return -EINVAL; + + return (fsel == BCM2835_FSEL_GPIO_IN); +} + static void bcm2835_gpio_set(struct gpio_chip *chip, unsigned offset, int value) { struct bcm2835_pinctrl *pc = gpiochip_get_data(chip); @@ -370,6 +382,7 @@ static struct gpio_chip bcm2835_gpio_chip = { .free = gpiochip_generic_free, .direction_input = bcm2835_gpio_direction_input, .direction_output = bcm2835_gpio_direction_output, + .get_direction = bcm2835_gpio_get_direction, .get = bcm2835_gpio_get, .set = bcm2835_gpio_set, .to_irq = bcm2835_gpio_to_irq,