linux-kernel - [net-next PATCH 02/11] net: dsa: qca8k: add LEDs blink

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Message-Id: <20230307170046.28917-3-ansuelsmth@gmail.com>
Date:   Tue,  7 Mar 2023 18:00:37 +0100
From:   Christian Marangi <ansuelsmth@...il.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Christian Marangi <ansuelsmth@...il.com>,
        John Crispin <john@...ozen.org>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, Lee Jones <lee@...nel.org>,
        linux-leds@...r.kernel.org
Subject: [net-next PATCH 02/11] net: dsa: qca8k: add LEDs blink_set() support

Add LEDs blink_set() support to qca8k Switch Family.
These LEDs support hw accellerated blinking at a fixed rate
of 4Hz.

Reject any other value since not supported by the LEDs switch.

Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
---
 drivers/net/dsa/qca/qca8k-leds.c | 38 ++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/drivers/net/dsa/qca/qca8k-leds.c b/drivers/net/dsa/qca/qca8k-leds.c
index 079f1b423f9a..821ffa1f5b5d 100644
--- a/drivers/net/dsa/qca/qca8k-leds.c
+++ b/drivers/net/dsa/qca/qca8k-leds.c
@@ -98,6 +98,43 @@ qca8k_cled_brightness_get(struct led_classdev *ldev)
 	return qca8k_led_brightness_get(led);
 }
 
+static int
+qca8k_cled_blink_set(struct led_classdev *ldev,
+		     unsigned long *delay_on,
+		     unsigned long *delay_off)
+{
+	struct qca8k_led *led = container_of(ldev, struct qca8k_led, cdev);
+	u32 mask, val = QCA8K_LED_ALWAYS_BLINK_4HZ;
+	struct qca8k_led_pattern_en reg_info;
+	struct qca8k_priv *priv = led->priv;
+
+	if (*delay_on == 0 && *delay_off == 0) {
+		*delay_on = 125;
+		*delay_off = 125;
+	}
+
+	if (*delay_on != 125 || *delay_off != 125) {
+		/* The hardware only supports blinking at 4Hz. Fall back
+		 * to software implementation in other cases.
+		 */
+		return -EINVAL;
+	}
+
+	qca8k_get_enable_led_reg(led->port_num, led->led_num, &reg_info);
+
+	if (led->port_num == 0 || led->port_num == 4) {
+		mask = QCA8K_LED_PATTERN_EN_MASK;
+		val <<= QCA8K_LED_PATTERN_EN_SHIFT;
+	} else {
+		mask = QCA8K_LED_PHY123_PATTERN_EN_MASK;
+	}
+
+	regmap_update_bits(priv->regmap, reg_info.reg, mask << reg_info.shift,
+			   val << reg_info.shift);
+
+	return 0;
+}
+
 static int
 qca8k_parse_port_leds(struct qca8k_priv *priv, struct fwnode_handle *port, int port_num)
 {
@@ -155,6 +192,7 @@ qca8k_parse_port_leds(struct qca8k_priv *priv, struct fwnode_handle *port, int p
 		port_led->cdev.max_brightness = 1;
 		port_led->cdev.brightness_set_blocking = qca8k_cled_brightness_set_blocking;
 		port_led->cdev.brightness_get = qca8k_cled_brightness_get;
+		port_led->cdev.blink_set = qca8k_cled_blink_set;
 		init_data.default_label = ":port";
 		init_data.devicename = "qca8k";
 		init_data.fwnode = led;
-- 
2.39.2