From patchwork Fri Dec 13 19:32:34 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dimitri Fedrau via B4 Relay X-Patchwork-Id: 13907745 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C424C1EC014; Fri, 13 Dec 2024 19:32:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734118362; cv=none; b=qoLdMBsYl2/XeuOGQ9FMChhRRf/9ikk7fE1l/g69ZiQBmkq08lBOKzcNEsyrUNN0PVK7z5qXYblwgOHbvJec8FVQ+lWfYfWMQPcLNnbs9Dy5l4H+Ntju4O2lvrojGY4YZq1BFUK1tFlD9zGXaRJunbtMnNjIroc2qbQQbfCpbq0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734118362; c=relaxed/simple; bh=hR2OWxnI4AiLexpWZFfBMDeP0lHpudXLW6rkM6ur0TU=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=vDvIz/RuOqX8ruPcQQaUxiz+/04IVGdXd83hWQprwFFERoGZ38h25EuUTUrrrdMiM3KwxB0dJCesRhpi3qg2er6b2Va8SS0ShIvRDxKhx30TKpawSftgPr4926u1qxoetYOxKys0gY7SSmnuYQDg58bxu4hP0kL4b+/gowPYUo8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=NhNUIDKC; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="NhNUIDKC" Received: by smtp.kernel.org (Postfix) with ESMTPS id 56AD5C4CED6; Fri, 13 Dec 2024 19:32:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1734118361; bh=hR2OWxnI4AiLexpWZFfBMDeP0lHpudXLW6rkM6ur0TU=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=NhNUIDKCSaOKqdoStmKMjeWWK/yO74LY2oC+mp8cMzGkuprfyRYCCXDclP5G+8y6q ixe4oTeAbE+iXcW48h53BiGjstJyVGcAz6884CA5GcIOum3OS1bgTj2n/8KqICuYtM ADTCj2QxjGWAHhTsLACcjsanoHZbakxXGOKqrkPpPXXyLgYQa8aJ6q1OFd/kbLPmJ6 bHdHOzActpcMd06X7hHthttFqP5cLlBs/J2TrqWxBUod0GNxgPoWHk7zuwBjMeESm1 3wtSBV/xmDUooNQlGdrMp3OvkK8cLmFASk6RshgmTcXYOHJkLr/ssmZ091W2UXGYAe HJirBo90lrCyQ== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4371BE77184; Fri, 13 Dec 2024 19:32:41 +0000 (UTC) From: Dimitri Fedrau via B4 Relay Date: Fri, 13 Dec 2024 20:32:34 +0100 Subject: [PATCH v2 2/2] power: supply: gpio-charger: add support for default charge current limit Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241213-default-charge-current-limit-v2-2-45886fce905c@liebherr.com> References: <20241213-default-charge-current-limit-v2-0-45886fce905c@liebherr.com> In-Reply-To: <20241213-default-charge-current-limit-v2-0-45886fce905c@liebherr.com> To: Sebastian Reichel , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Dimitri Fedrau , Dimitri Fedrau X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1734118360; l=2214; i=dimitri.fedrau@liebherr.com; s=20241202; h=from:subject:message-id; bh=8kkaeG3Fu8A0mMHCllTq6XlCfvacmcvVln/ePhFAfLE=; b=l1eFTt5Hpnmk4r5m9dimQx/rMfKLcUx4nHVb3uN0U9n72cqYd4WKhxzux+t615DWImfJgTDb9 PbudIbCxdGEDfRoJiLC8J0+qokkTQ0ruJNf9krtZ2W4wtfsWA8lzBP6 X-Developer-Key: i=dimitri.fedrau@liebherr.com; a=ed25519; pk=rT653x09JSQvotxIqQl4/XiI4AOiBZrdOGvxDUbb5m8= X-Endpoint-Received: by B4 Relay for dimitri.fedrau@liebherr.com/20241202 with auth_id=290 X-Original-From: Dimitri Fedrau Reply-To: dimitri.fedrau@liebherr.com From: Dimitri Fedrau With DT properties charge-current-limit-gpios and charge-current-limit-mapping one can define charge current limits in uA using up to 32 GPIOs. At the moment the driver defaults to smallest charge current limitation for safety reasons. When disabling charging is supported, which should be common, the driver defaults to non charging on probe. By having a default, charging can be enabled on probe for such devices. Signed-off-by: Dimitri Fedrau --- drivers/power/supply/gpio-charger.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/power/supply/gpio-charger.c b/drivers/power/supply/gpio-charger.c index 68212b39785beabfe5536a18fa15bc249f7b1eea..56149545a1dc6004b474cec44984c6dfad3413b5 100644 --- a/drivers/power/supply/gpio-charger.c +++ b/drivers/power/supply/gpio-charger.c @@ -187,6 +187,8 @@ static int init_charge_current_limit(struct device *dev, { int i, len; u32 cur_limit = U32_MAX; + bool set_def_limit; + u32 def_limit; gpio_charger->current_limit_gpios = devm_gpiod_get_array_optional(dev, "charge-current-limit", GPIOD_OUT_LOW); @@ -220,6 +222,9 @@ static int init_charge_current_limit(struct device *dev, if (len < 0) return len; + set_def_limit = !device_property_read_u32(dev, + "charge-current-limit-default-microamp", + &def_limit); for (i=0; i < gpio_charger->current_limit_map_size; i++) { if (gpio_charger->current_limit_map[i].limit_ua > cur_limit) { dev_err(dev, "charge-current-limit-mapping not sorted by current in descending order\n"); @@ -227,8 +232,16 @@ static int init_charge_current_limit(struct device *dev, } cur_limit = gpio_charger->current_limit_map[i].limit_ua; + if (set_def_limit && def_limit == cur_limit) { + set_charge_current_limit(gpio_charger, cur_limit); + return 0; + } } + if (set_def_limit) + dev_warn(dev, "charge-current-limit-default-microamp %u not listed in charge-current-limit-mapping\n", + def_limit); + /* default to smallest current limitation for safety reasons */ len = gpio_charger->current_limit_map_size - 1; set_charge_current_limit(gpio_charger,