From patchwork Thu Sep 21 13:32:01 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wolfram Sang X-Patchwork-Id: 13394431 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D4CEFE7D0A6 for ; Thu, 21 Sep 2023 19:53:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230173AbjIUTxY (ORCPT ); Thu, 21 Sep 2023 15:53:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41262 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230105AbjIUTxG (ORCPT ); Thu, 21 Sep 2023 15:53:06 -0400 Received: from mail.zeus03.de (www.zeus03.de [194.117.254.33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0772B72407 for ; Thu, 21 Sep 2023 11:58:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= sang-engineering.com; h=from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; s=k1; bh=uK9AT+p6I3q5cMU/FhQSmJyxMmdzZujBNmfXxX9OQ/Y=; b=Ws/F0y IJEUCwYVDuBG8XEfGaRJOOmpS8LZ1ZxuugbH7mpzb9f7oJZq3wD3GmogwiFcof0U Q1l3H/AzKU8TUCiu0bQ5G5onMskbG8xMfleaDnkazoVXu5HXVfNZg2NfjELPgLWj cqBz/ZyrcF8Mj6YEgwLQPECsA73JSU2aln8IVfMSdQQY61GgFHPkIFHHwmL8Q7MQ ZZ8zdV2LM4z8mgxFS2nQ2R9N/ncsB9T5b3eRKXq/E3arY2FWc2zYO/aDWgqhW2zY NEpzmZ9zPFBC2wJ31UjWnbpqyJP1jtWIyNBigtjOkRONIsMlFW95BeLpxqzCVuHS Eop8gWjP3hHFcmyg== Received: (qmail 964496 invoked from network); 21 Sep 2023 15:32:14 +0200 Received: by mail.zeus03.de with ESMTPSA (TLS_AES_256_GCM_SHA384 encrypted, authenticated); 21 Sep 2023 15:32:14 +0200 X-UD-Smtp-Session: l3s3148p1@tYwShd4FDUIuciJ+ From: Wolfram Sang To: linux-renesas-soc@vger.kernel.org Cc: Wolfram Sang , Geert Uytterhoeven , Johan Hovold , linux-kernel@vger.kernel.org Subject: [PATCH v3 3/3] gnss: ubx: add support for the reset gpio Date: Thu, 21 Sep 2023 15:32:01 +0200 Message-Id: <20230921133202.5828-4-wsa+renesas@sang-engineering.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20230921133202.5828-1-wsa+renesas@sang-engineering.com> References: <20230921133202.5828-1-wsa+renesas@sang-engineering.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Tested with a Renesas KingFisher board. Because my GNSS device is hooked up via UART and I2C simultaneously, I could verify functionality by opening/closing the GNSS device using UART and see if the corresponding I2C device was visible on the bus. Signed-off-by: Wolfram Sang Reviewed-by: Geert Uytterhoeven --- drivers/gnss/ubx.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/gnss/ubx.c b/drivers/gnss/ubx.c index 9b76b101ba5e..e7d151cbc8c3 100644 --- a/drivers/gnss/ubx.c +++ b/drivers/gnss/ubx.c @@ -7,6 +7,7 @@ #include #include +#include #include #include #include @@ -18,6 +19,7 @@ struct ubx_data { struct regulator *vcc; + struct gpio_desc *reset_gpio; }; static int ubx_set_active(struct gnss_serial *gserial) @@ -29,6 +31,8 @@ static int ubx_set_active(struct gnss_serial *gserial) if (ret) return ret; + gpiod_set_value_cansleep(data->reset_gpio, 0); + return 0; } @@ -37,6 +41,8 @@ static int ubx_set_standby(struct gnss_serial *gserial) struct ubx_data *data = gnss_serial_get_drvdata(gserial); int ret; + gpiod_set_value_cansleep(data->reset_gpio, 1); + ret = regulator_disable(data->vcc); if (ret) return ret; @@ -90,6 +96,13 @@ static int ubx_probe(struct serdev_device *serdev) if (ret < 0 && ret != -ENODEV) goto err_free_gserial; + /* Start with reset asserted */ + data->reset_gpio = devm_gpiod_get_optional(&serdev->dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(data->reset_gpio)) { + ret = PTR_ERR(data->reset_gpio); + goto err_free_gserial; + } + ret = gnss_serial_register(gserial); if (ret) goto err_free_gserial;