From patchwork Wed Oct 7 08:45:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 11820033 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9792E175A for ; Wed, 7 Oct 2020 08:46:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7F75D20872 for ; Wed, 7 Oct 2020 08:46:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728014AbgJGIqL (ORCPT ); Wed, 7 Oct 2020 04:46:11 -0400 Received: from retiisi.org.uk ([95.216.213.190]:57070 "EHLO hillosipuli.retiisi.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727990AbgJGIqJ (ORCPT ); Wed, 7 Oct 2020 04:46:09 -0400 Received: from lanttu.localdomain (lanttu-e.localdomain [192.168.1.64]) by hillosipuli.retiisi.eu (Postfix) with ESMTP id 8AEA7634C8F for ; Wed, 7 Oct 2020 11:45:19 +0300 (EEST) From: Sakari Ailus To: linux-media@vger.kernel.org Subject: [PATCH v2 051/106] =?utf-8?q?ccs=3A_Use_longer_pre-I=C2=B2C_sleep_f?= =?utf-8?q?or_CCS_compliant_devices?= Date: Wed, 7 Oct 2020 11:45:04 +0300 Message-Id: <20201007084557.25843-44-sakari.ailus@linux.intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20201007084557.25843-1-sakari.ailus@linux.intel.com> References: <20201007084505.25761-1-sakari.ailus@linux.intel.com> <20201007084557.25843-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Longer idle period is required on I²C bus before the first transaction after lifting xshutdown. Signed-off-by: Sakari Ailus --- drivers/media/i2c/ccs/ccs-core.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/media/i2c/ccs/ccs-core.c b/drivers/media/i2c/ccs/ccs-core.c index 940b5327a388..94661275d599 100644 --- a/drivers/media/i2c/ccs/ccs-core.c +++ b/drivers/media/i2c/ccs/ccs-core.c @@ -1300,6 +1300,7 @@ static int ccs_power_on(struct device *dev) */ struct ccs_sensor *sensor = container_of(ssd, struct ccs_sensor, ssds[0]); + const struct ccs_device *ccsdev = device_get_match_data(dev); unsigned int sleep; int rval; @@ -1320,7 +1321,11 @@ static int ccs_power_on(struct device *dev) gpiod_set_value(sensor->reset, 0); gpiod_set_value(sensor->xshutdown, 1); - sleep = SMIAPP_RESET_DELAY(sensor->hwcfg.ext_clk); + if (ccsdev->flags & CCS_DEVICE_FLAG_IS_SMIA) + sleep = SMIAPP_RESET_DELAY(sensor->hwcfg.ext_clk); + else + sleep = 5000; + usleep_range(sleep, sleep); /*