Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934170AbbELXZa (ORCPT ); Tue, 12 May 2015 19:25:30 -0400 Received: from mail-gw2-out.broadcom.com ([216.31.210.63]:59505 "EHLO mail-gw2-out.broadcom.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933883AbbELXZZ (ORCPT ); Tue, 12 May 2015 19:25:25 -0400 X-IronPort-AV: E=Sophos;i="5.13,418,1427785200"; d="scan'208";a="64671133" From: Jonathan Richardson To: Tim Kryger , Dmitry Torokhov , Anatol Pomazau , Arun Ramamurthy , Thierry Reding CC: Scott Branden , Jonathan Richardson , bcm-kernel-feedback-list , , Subject: [PATCH v7 1/5] drivers: pwm: core: Add pwmchip_add_inversed Date: Tue, 12 May 2015 16:28:12 -0700 Message-ID: <1431473296-13683-2-git-send-email-jonathar@broadcom.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1431473296-13683-1-git-send-email-jonathar@broadcom.com> References: <1431473296-13683-1-git-send-email-jonathar@broadcom.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3357 Lines: 110 From: Tim Kryger Add a new function to register a PWM chip with channels that have their initial polarity as inversed. This benefits drivers of controllers that by default operate with inversed polarity by removing the need to modify the polarity during initialization. Signed-off-by: Tim Kryger Signed-off-by: Jonathan Richardson --- drivers/pwm/core.c | 36 ++++++++++++++++++++++++++++-------- include/linux/pwm.h | 6 ++++++ 2 files changed, 34 insertions(+), 8 deletions(-) diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c index ba34c7d..224645f 100644 --- a/drivers/pwm/core.c +++ b/drivers/pwm/core.c @@ -222,14 +222,8 @@ void *pwm_get_chip_data(struct pwm_device *pwm) } EXPORT_SYMBOL_GPL(pwm_get_chip_data); -/** - * pwmchip_add() - register a new PWM chip - * @chip: the PWM chip to add - * - * Register a new PWM chip. If chip->base < 0 then a dynamically assigned base - * will be used. - */ -int pwmchip_add(struct pwm_chip *chip) +static int pwmchip_add_with_polarity(struct pwm_chip *chip, + enum pwm_polarity polarity) { struct pwm_device *pwm; unsigned int i; @@ -259,6 +253,7 @@ int pwmchip_add(struct pwm_chip *chip) pwm->chip = chip; pwm->pwm = chip->base + i; pwm->hwpwm = i; + pwm->polarity = polarity; radix_tree_insert(&pwm_tree, pwm->pwm, pwm); } @@ -279,9 +274,34 @@ out: mutex_unlock(&pwm_lock); return ret; } + +/** + * pwmchip_add() - register a new PWM chip + * @chip: the PWM chip to add + * + * Register a new PWM chip. If chip->base < 0 then a dynamically assigned base + * will be used. The initial polarity for all channels is normal. + */ +int pwmchip_add(struct pwm_chip *chip) +{ + return pwmchip_add_with_polarity(chip, PWM_POLARITY_NORMAL); +} EXPORT_SYMBOL_GPL(pwmchip_add); /** + * pwmchip_add_inversed() - register a new PWM chip + * @chip: the PWM chip to add + * + * Register a new PWM chip. If chip->base < 0 then a dynamically assigned base + * will be used. The initial polarity for all channels is inversed. + */ +int pwmchip_add_inversed(struct pwm_chip *chip) +{ + return pwmchip_add_with_polarity(chip, PWM_POLARITY_INVERSED); +} +EXPORT_SYMBOL_GPL(pwmchip_add_inversed); + +/** * pwmchip_remove() - remove a PWM chip * @chip: the PWM chip to remove * diff --git a/include/linux/pwm.h b/include/linux/pwm.h index e90628c..358547f 100644 --- a/include/linux/pwm.h +++ b/include/linux/pwm.h @@ -183,6 +183,7 @@ int pwm_set_chip_data(struct pwm_device *pwm, void *data); void *pwm_get_chip_data(struct pwm_device *pwm); int pwmchip_add(struct pwm_chip *chip); +int pwmchip_add_inversed(struct pwm_chip *chip); int pwmchip_remove(struct pwm_chip *chip); struct pwm_device *pwm_request_from_chip(struct pwm_chip *chip, unsigned int index, @@ -217,6 +218,11 @@ static inline int pwmchip_add(struct pwm_chip *chip) return -EINVAL; } +static inline int pwmchip_add_inversed(struct pwm_chip *chip) +{ + return -EINVAL; +} + static inline int pwmchip_remove(struct pwm_chip *chip) { return -EINVAL; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/