From patchwork Wed Oct 27 13:45:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prabhakar X-Patchwork-Id: 12587363 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8DB6EC433EF for ; Wed, 27 Oct 2021 13:45:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7A97960E05 for ; Wed, 27 Oct 2021 13:45:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242265AbhJ0Nrr (ORCPT ); Wed, 27 Oct 2021 09:47:47 -0400 Received: from relmlor1.renesas.com ([210.160.252.171]:39040 "EHLO relmlie5.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S242235AbhJ0Nrq (ORCPT ); Wed, 27 Oct 2021 09:47:46 -0400 X-IronPort-AV: E=Sophos;i="5.87,186,1631545200"; d="scan'208";a="98370789" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie5.idc.renesas.com with ESMTP; 27 Oct 2021 22:45:19 +0900 Received: from localhost.localdomain (unknown [10.226.36.204]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id 791A54010DD8; Wed, 27 Oct 2021 22:45:17 +0900 (JST) From: Lad Prabhakar To: Linus Walleij , Rob Herring , Geert Uytterhoeven , linux-gpio@vger.kernel.org, devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Prabhakar , Biju Das , Lad Prabhakar Subject: [PATCH 2/4] pinctrl: pinconf-generic: Add support for "output-impedance-ohms" to be extracted from DT files Date: Wed, 27 Oct 2021 14:45:07 +0100 Message-Id: <20211027134509.5036-3-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211027134509.5036-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20211027134509.5036-1-prabhakar.mahadev-lad.rj@bp.renesas.com> Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Add "output-impedance-ohms" property to generic options used for DT parsing files. This enables drivers, which use generic pin configurations, to get the value passed to this property. Signed-off-by: Lad Prabhakar Reviewed-by: Geert Uytterhoeven Reviewed-by: Biju Das Reviewed-by: Linus Walleij --- RFC->v1 * Renamed PIN_CONFIG_OUTPUT_IMPEDANCE -> PIN_CONFIG_OUTPUT_IMPEDANCE_OHMS * Renamed output-impedance to output-impedance-ohms * Included RB tags * Updated description and commit message --- drivers/pinctrl/pinconf-generic.c | 2 ++ include/linux/pinctrl/pinconf-generic.h | 3 +++ 2 files changed, 5 insertions(+) diff --git a/drivers/pinctrl/pinconf-generic.c b/drivers/pinctrl/pinconf-generic.c index 22e8d4c4040e..f8edcc88ac01 100644 --- a/drivers/pinctrl/pinconf-generic.c +++ b/drivers/pinctrl/pinconf-generic.c @@ -46,6 +46,7 @@ static const struct pin_config_item conf_items[] = { PCONFDUMP(PIN_CONFIG_MODE_LOW_POWER, "pin low power", "mode", true), PCONFDUMP(PIN_CONFIG_OUTPUT_ENABLE, "output enabled", NULL, false), PCONFDUMP(PIN_CONFIG_OUTPUT, "pin output", "level", true), + PCONFDUMP(PIN_CONFIG_OUTPUT_IMPEDANCE_OHMS, "output impedance", "ohms", true), PCONFDUMP(PIN_CONFIG_POWER_SOURCE, "pin power source", "selector", true), PCONFDUMP(PIN_CONFIG_SLEEP_HARDWARE_STATE, "sleep hardware state", NULL, false), PCONFDUMP(PIN_CONFIG_SLEW_RATE, "slew rate", NULL, true), @@ -179,6 +180,7 @@ static const struct pinconf_generic_params dt_params[] = { { "output-disable", PIN_CONFIG_OUTPUT_ENABLE, 0 }, { "output-enable", PIN_CONFIG_OUTPUT_ENABLE, 1 }, { "output-high", PIN_CONFIG_OUTPUT, 1, }, + { "output-impedance-ohms", PIN_CONFIG_OUTPUT_IMPEDANCE_OHMS, 0 }, { "output-low", PIN_CONFIG_OUTPUT, 0, }, { "power-source", PIN_CONFIG_POWER_SOURCE, 0 }, { "sleep-hardware-state", PIN_CONFIG_SLEEP_HARDWARE_STATE, 0 }, diff --git a/include/linux/pinctrl/pinconf-generic.h b/include/linux/pinctrl/pinconf-generic.h index eee0e3948537..2422211d6a5a 100644 --- a/include/linux/pinctrl/pinconf-generic.h +++ b/include/linux/pinctrl/pinconf-generic.h @@ -91,6 +91,8 @@ struct pinctrl_map; * configuration (eg. the currently selected mux function) drive values on * the line. Use argument 1 to enable output mode, argument 0 to disable * it. + * @PIN_CONFIG_OUTPUT_IMPEDANCE_OHMS: this will configure the output impedance + * of the pin with the value passed as argument. The argument is in ohms. * @PIN_CONFIG_PERSIST_STATE: retain pin state across sleep or controller reset * @PIN_CONFIG_POWER_SOURCE: if the pin can select between different power * supplies, the argument to this parameter (on a custom format) tells @@ -129,6 +131,7 @@ enum pin_config_param { PIN_CONFIG_MODE_PWM, PIN_CONFIG_OUTPUT, PIN_CONFIG_OUTPUT_ENABLE, + PIN_CONFIG_OUTPUT_IMPEDANCE_OHMS, PIN_CONFIG_PERSIST_STATE, PIN_CONFIG_POWER_SOURCE, PIN_CONFIG_SKEW_DELAY,