From nobody Sun Apr 19 03:58:58 2026 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 4F9A3C433EF for ; Thu, 7 Jul 2022 00:02:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234846AbiGGACp (ORCPT ); Wed, 6 Jul 2022 20:02:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41672 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234783AbiGGACm (ORCPT ); Wed, 6 Jul 2022 20:02:42 -0400 Received: from smtp-relay-canonical-0.canonical.com (smtp-relay-canonical-0.canonical.com [185.125.188.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 93F522D1E0; Wed, 6 Jul 2022 17:02:41 -0700 (PDT) Received: from localhost.localdomain (unknown [10.101.196.174]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp-relay-canonical-0.canonical.com (Postfix) with ESMTPSA id B52813F103; Thu, 7 Jul 2022 00:02:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=canonical.com; s=20210705; t=1657152159; bh=+uLBVOziiWmLh5CeiyH/bxZC10Qn3rIy3RsnruTA3rk=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=f2em4TPDTDnAizo2+qHcwv4/oOmrgEflG7Xi2Q0xcQX5ABl2bKptsZp3jncMIfxkI +oQC9Rx56GBWYJGo3m4KHeURgYjutYDGxkQBI5wpMTSykMXAhd1SiWG6ZMTwxClPfX 5Lhi4PkcjPCMCHtLBl5H2rg3Fdh50fFFPCVM1gYceA9CrgNCF5kRLkP81tEICqsfDa 7vYoYQeNryDgZ+iOQQXuF4Ob47jZ1Nhe75KFxhPmgUGxa5p5KIu4XOfDSY1YD4XTi8 OHi+1R7uBVpuVOY+A1ZaDlWOz896neXLj8ivZOayeQhgb7CpASqdZ9CupfC916DnoY 3TNrncHxrFdNw== From: Kai-Heng Feng To: ktsai@capellamicro.com, jic23@kernel.org, lars@metafoo.de Cc: hdegoede@redhat.com, Kai-Heng Feng , linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2] iio: light: cm32181: Add PM support Date: Thu, 7 Jul 2022 08:01:51 +0800 Message-Id: <20220707000151.33381-1-kai.heng.feng@canonical.com> X-Mailer: git-send-email 2.36.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The read on in_illuminance_input keeps at 0 after system sleep. So add proper suspend and resume callback to make the sensor keep working after system sleep. Signed-off-by: Kai-Heng Feng --- v2: - Use dev_get_drvdata() instead of i2c_get_clientdata() to avoid extra dereference. drivers/iio/light/cm32181.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/drivers/iio/light/cm32181.c b/drivers/iio/light/cm32181.c index 97649944f1df6..edbe6a3138d0b 100644 --- a/drivers/iio/light/cm32181.c +++ b/drivers/iio/light/cm32181.c @@ -460,6 +460,8 @@ static int cm32181_probe(struct i2c_client *client) return PTR_ERR(client); } =20 + i2c_set_clientdata(client, indio_dev); + cm32181 =3D iio_priv(indio_dev); cm32181->client =3D client; cm32181->dev =3D dev; @@ -486,6 +488,25 @@ static int cm32181_probe(struct i2c_client *client) return 0; } =20 +static int cm32181_suspend(struct device *dev) +{ + struct i2c_client *client =3D to_i2c_client(dev); + + return i2c_smbus_write_word_data(client, CM32181_REG_ADDR_CMD, + CM32181_CMD_ALS_DISABLE); +} + +static int cm32181_resume(struct device *dev) +{ + struct i2c_client *client =3D to_i2c_client(dev); + struct cm32181_chip *cm32181 =3D iio_priv(dev_get_drvdata(dev)); + + return i2c_smbus_write_word_data(client, CM32181_REG_ADDR_CMD, + cm32181->conf_regs[CM32181_REG_ADDR_CMD]); +} + +DEFINE_SIMPLE_DEV_PM_OPS(cm32181_pm_ops, cm32181_suspend, cm32181_resume); + static const struct of_device_id cm32181_of_match[] =3D { { .compatible =3D "capella,cm3218" }, { .compatible =3D "capella,cm32181" }, @@ -506,6 +527,7 @@ static struct i2c_driver cm32181_driver =3D { .name =3D "cm32181", .acpi_match_table =3D ACPI_PTR(cm32181_acpi_match), .of_match_table =3D cm32181_of_match, + .pm =3D pm_sleep_ptr(&cm32181_pm_ops), }, .probe_new =3D cm32181_probe, }; --=20 2.36.1