From patchwork Tue Feb 16 17:41:37 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jacopo Mondi X-Patchwork-Id: 12090439 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 62013C43333 for ; Tue, 16 Feb 2021 17:42:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2A4D264DAF for ; Tue, 16 Feb 2021 17:42:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231235AbhBPRmr (ORCPT ); Tue, 16 Feb 2021 12:42:47 -0500 Received: from relay12.mail.gandi.net ([217.70.178.232]:56179 "EHLO relay12.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231190AbhBPRmV (ORCPT ); Tue, 16 Feb 2021 12:42:21 -0500 Received: from uno.lan (93-34-118-233.ip49.fastwebnet.it [93.34.118.233]) (Authenticated sender: jacopo@jmondi.org) by relay12.mail.gandi.net (Postfix) with ESMTPSA id C74D4200004; Tue, 16 Feb 2021 17:41:38 +0000 (UTC) From: Jacopo Mondi To: kieran.bingham+renesas@ideasonboard.com, laurent.pinchart+renesas@ideasonboard.com, niklas.soderlund+renesas@ragnatech.se, geert@linux-m68k.org Cc: Jacopo Mondi , Mauro Carvalho Chehab , linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 07/16] media: i2c: rdacm2x: Fix wake up delay Date: Tue, 16 Feb 2021 18:41:37 +0100 Message-Id: <20210216174146.106639-8-jacopo+renesas@jmondi.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210216174146.106639-1-jacopo+renesas@jmondi.org> References: <20210216174146.106639-1-jacopo+renesas@jmondi.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org The MAX9271 chip manual prescribes a delay of 5 milliseconds after the chip exists from low power state. Adjust the required delay in the rdacm21 camera module and add it to the rdacm20 that currently doesn't implement one. Signed-off-by: Jacopo Mondi Reviewed-by: Kieran Bingham Reviewed-by: Laurent Pinchart --- drivers/media/i2c/rdacm20.c | 1 + drivers/media/i2c/rdacm21.c | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/media/i2c/rdacm20.c b/drivers/media/i2c/rdacm20.c index ea30cc936531..39e4b4241870 100644 --- a/drivers/media/i2c/rdacm20.c +++ b/drivers/media/i2c/rdacm20.c @@ -460,6 +460,7 @@ static int rdacm20_initialize(struct rdacm20_device *dev) /* Verify communication with the MAX9271: ping to wakeup. */ dev->serializer.client->addr = MAX9271_DEFAULT_ADDR; i2c_smbus_read_byte(dev->serializer.client); + usleep_range(5000, 8000); /* Serial link disabled during config as it needs a valid pixel clock. */ ret = max9271_set_serial_link(&dev->serializer, false); diff --git a/drivers/media/i2c/rdacm21.c b/drivers/media/i2c/rdacm21.c index 179d107f494c..b22a2ca5340b 100644 --- a/drivers/media/i2c/rdacm21.c +++ b/drivers/media/i2c/rdacm21.c @@ -453,7 +453,7 @@ static int rdacm21_initialize(struct rdacm21_device *dev) /* Verify communication with the MAX9271: ping to wakeup. */ dev->serializer.client->addr = MAX9271_DEFAULT_ADDR; i2c_smbus_read_byte(dev->serializer.client); - usleep_range(3000, 5000); + usleep_range(5000, 8000); /* Enable reverse channel and disable the serial link. */ ret = max9271_set_serial_link(&dev->serializer, false);