From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753585AbeCQPuN (ORCPT ); Sat, 17 Mar 2018 11:50:13 -0400 Received: from mail-yw0-f193.google.com ([209.85.161.193]:33520 "EHLO mail-yw0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752875AbeCQPuI (ORCPT ); Sat, 17 Mar 2018 11:50:08 -0400 X-Google-Smtp-Source: AG47ELu0IRzSYuUjiuK77TXhnUn9DTi6EX/P0wJH5BFm/5OZnSCnFS5i28GpbPYuXzf/D7H/+5siFA== From: William Breathitt Gray To: linus.walleij@linaro.org Cc: andy.shevchenko@gmail.com, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, William Breathitt Gray , Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler Subject: [PATCH v3 1/8] iio: stx104: Implement get_multiple callback Date: Sat, 17 Mar 2018 11:49:56 -0400 Message-Id: <14a09900bf4642495ebe4072b9eb02769dbc4c5e.1521301345.git.vilhelm.gray@gmail.com> X-Mailer: git-send-email 2.16.2 In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The Apex Embedded Systems STX104 series of devices provides 4 TTL compatible lines of inputs accessed via a single 4-bit port. Since four input lines are acquired on a single port input read, the STX104 GPIO driver may improve multiple input reads by utilizing a get_multiple callback. This patch implements the stx104_gpio_get_multiple function which serves as the respective get_multiple callback. Cc: Jonathan Cameron Cc: Hartmut Knaack Cc: Lars-Peter Clausen Cc: Peter Meerwald-Stadler Signed-off-by: William Breathitt Gray --- drivers/iio/adc/stx104.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/iio/adc/stx104.c b/drivers/iio/adc/stx104.c index 17b021f33180..0662ca199eb0 100644 --- a/drivers/iio/adc/stx104.c +++ b/drivers/iio/adc/stx104.c @@ -233,6 +233,16 @@ static int stx104_gpio_get(struct gpio_chip *chip, unsigned int offset) return !!(inb(stx104gpio->base) & BIT(offset)); } +static int stx104_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask, + unsigned long *bits) +{ + struct stx104_gpio *const stx104gpio = gpiochip_get_data(chip); + + *bits = inb(stx104gpio->base); + + return 0; +} + static void stx104_gpio_set(struct gpio_chip *chip, unsigned int offset, int value) { @@ -342,6 +352,7 @@ static int stx104_probe(struct device *dev, unsigned int id) stx104gpio->chip.direction_input = stx104_gpio_direction_input; stx104gpio->chip.direction_output = stx104_gpio_direction_output; stx104gpio->chip.get = stx104_gpio_get; + stx104gpio->chip.get_multiple = stx104_gpio_get_multiple; stx104gpio->chip.set = stx104_gpio_set; stx104gpio->chip.set_multiple = stx104_gpio_set_multiple; stx104gpio->base = base[id] + 3; -- 2.16.2