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AJvYcCWW9cAxY8RlppEiBQpt7DRLwBnJDdRZUTkq5wdUWJ/SyCVE+A/Pp9oEmIHGLiLXeWM+iNGoV5cDVK0kJkVRNT1HoeM8+8TFLkFgkXCIhh6aOwdDhalq03CaIYybVkuYhWYTIgw32Q== X-Gm-Message-State: AOJu0YzytBbFL6EUCQs0Dc5mw/sqVUKpGcrAWqyobY6iNyQP/Pctkxqd Xt3XWqGd7OZQJ7hXyBe00m9+ksxvtskBKguvGGVPb9DA6IRrDO9Q X-Google-Smtp-Source: AGHT+IGLrF7R/GoK7DvLxn2rE5wHYPa4hHdeD3olNUeNmJFauek8wLdUUrmSSS7uheaq9kYw3f4lNA== X-Received: by 2002:a05:6808:f8a:b0:3d9:dfef:d7c8 with SMTP id 5614622812f47-3db55817bf8mr5537828b6e.27.1722626574804; Fri, 02 Aug 2024 12:22:54 -0700 (PDT) Received: from localhost.localdomain ([2600:1700:fb0:1bcf::54]) by smtp.gmail.com with ESMTPSA id 5614622812f47-3db563b7065sm584592b6e.46.2024.08.02.12.22.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 02 Aug 2024 12:22:54 -0700 (PDT) From: Chris Morgan To: linux-sunxi@lists.linux.dev Cc: linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-iio@vger.kernel.org, quentin.schulz@free-electrons.com, mripard@kernel.org, tgamblin@baylibre.com, aidanmacdonald.0x0@gmail.com, u.kleine-koenig@pengutronix.de, lee@kernel.org, samuel@sholland.org, jernej.skrabec@gmail.com, sre@kernel.org, wens@csie.org, conor+dt@kernel.org, krzk+dt@kernel.org, robh@kernel.org, lars@metafoo.de, jic23@kernel.org, Chris Morgan Subject: [PATCH V2 06/15] power: supply: axp20x_usb_power: add input-current-limit-microamp Date: Fri, 2 Aug 2024 14:20:17 -0500 Message-Id: <20240802192026.446344-7-macroalpha82@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240802192026.446344-1-macroalpha82@gmail.com> References: <20240802192026.446344-1-macroalpha82@gmail.com> Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Chris Morgan Allow users to specify a maximum input current for the device. Some devices allow up to 3.25A of input current (such as the AXP717), which may be too much for some implementations. Signed-off-by: Chris Morgan --- drivers/power/supply/axp20x_usb_power.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/drivers/power/supply/axp20x_usb_power.c b/drivers/power/supply/axp20x_usb_power.c index cd9e92f2ce71..69fbb5861934 100644 --- a/drivers/power/supply/axp20x_usb_power.c +++ b/drivers/power/supply/axp20x_usb_power.c @@ -80,6 +80,7 @@ struct axp20x_usb_power { struct iio_channel *vbus_v; struct iio_channel *vbus_i; struct delayed_work vbus_detect; + int max_input_cur; unsigned int old_status; unsigned int online; unsigned int num_irqs; @@ -323,6 +324,13 @@ static int axp20x_usb_power_set_input_current_limit(struct axp20x_usb_power *pow if (intval == -1) return -EINVAL; + if (power->max_input_cur && (intval > power->max_input_cur)) { + dev_warn(power->dev, + "reqested current %d clamped to max current %d\n", + intval, power->max_input_cur); + intval = power->max_input_cur; + } + /* * BC1.2 detection can cause a race condition if we try to set a current * limit while it's in progress. When it finishes it will overwrite the @@ -661,6 +669,18 @@ static int axp20x_regmap_field_alloc_optional(struct device *dev, return 0; } +/* Optionally allow users to specify a maximum charging current. */ +static void axp20x_usb_power_parse_dt(struct device *dev, + struct axp20x_usb_power *power) +{ + int ret; + + ret = device_property_read_u32(dev, "input-current-limit-microamp", + &power->max_input_cur); + if (ret) + dev_dbg(dev, "%s() no input-current-limit specified\n", __func__); +} + static int axp20x_usb_power_probe(struct platform_device *pdev) { struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); @@ -697,6 +717,8 @@ static int axp20x_usb_power_probe(struct platform_device *pdev) if (IS_ERR(power->curr_lim_fld)) return PTR_ERR(power->curr_lim_fld); + axp20x_usb_power_parse_dt(&pdev->dev, power); + ret = axp20x_regmap_field_alloc_optional(&pdev->dev, power->regmap, axp_data->vbus_valid_bit, &power->vbus_valid_bit);