--- /dev/null
+From e190f57df3c7e7713687905c14e72fbcbd81c5e4 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <noltari@gmail.com>
+Date: Thu, 4 Jun 2020 15:59:05 +0200
+Subject: [PATCH] leds-bcm6328: support second hw blinking interval
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Right now the driver uses only 3 LED modes:
+0: On
+1: HW Blinking (Interval 1)
+3: Off
+
+However, the controller supports a second HW blinking interval, which results
+in 4 possible LED modes:
+0: On
+1: HW Blinking (Interval 1)
+2: HW Blinking (Interval 2)
+3: Off
+
+Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
+Signed-off-by: Pavel Machek <pavel@ucw.cz>
+---
+ drivers/leds/leds-bcm6328.c | 97 ++++++++++++++++++++++++++++---------
+ 1 file changed, 75 insertions(+), 22 deletions(-)
+
+--- a/drivers/leds/leds-bcm6328.c
++++ b/drivers/leds/leds-bcm6328.c
+@@ -24,12 +24,17 @@
+
+ #define BCM6328_LED_MAX_COUNT 24
+ #define BCM6328_LED_DEF_DELAY 500
+-#define BCM6328_LED_INTERVAL_MS 20
+
+-#define BCM6328_LED_INTV_MASK 0x3f
+-#define BCM6328_LED_FAST_INTV_SHIFT 6
+-#define BCM6328_LED_FAST_INTV_MASK (BCM6328_LED_INTV_MASK << \
+- BCM6328_LED_FAST_INTV_SHIFT)
++#define BCM6328_LED_BLINK_DELAYS 2
++#define BCM6328_LED_BLINK_MS 20
++
++#define BCM6328_LED_BLINK_MASK 0x3f
++#define BCM6328_LED_BLINK1_SHIFT 0
++#define BCM6328_LED_BLINK1_MASK (BCM6328_LED_BLINK_MASK << \
++ BCM6328_LED_BLINK1_SHIFT)
++#define BCM6328_LED_BLINK2_SHIFT 6
++#define BCM6328_LED_BLINK2_MASK (BCM6328_LED_BLINK_MASK << \
++ BCM6328_LED_BLINK2_SHIFT)
+ #define BCM6328_SERIAL_LED_EN BIT(12)
+ #define BCM6328_SERIAL_LED_MUX BIT(13)
+ #define BCM6328_SERIAL_LED_CLK_NPOL BIT(14)
+@@ -45,8 +50,8 @@
+
+ #define BCM6328_LED_MODE_MASK 3
+ #define BCM6328_LED_MODE_ON 0
+-#define BCM6328_LED_MODE_FAST 1
+-#define BCM6328_LED_MODE_BLINK 2
++#define BCM6328_LED_MODE_BLINK1 1
++#define BCM6328_LED_MODE_BLINK2 2
+ #define BCM6328_LED_MODE_OFF 3
+ #define BCM6328_LED_SHIFT(X) ((X) << 1)
+
+@@ -127,12 +132,18 @@ static void bcm6328_led_set(struct led_c
+ unsigned long flags;
+
+ spin_lock_irqsave(led->lock, flags);
+- *(led->blink_leds) &= ~BIT(led->pin);
++
++ /* Remove LED from cached HW blinking intervals */
++ led->blink_leds[0] &= ~BIT(led->pin);
++ led->blink_leds[1] &= ~BIT(led->pin);
++
++ /* Set LED on/off */
+ if ((led->active_low && value == LED_OFF) ||
+ (!led->active_low && value != LED_OFF))
+ bcm6328_led_mode(led, BCM6328_LED_MODE_ON);
+ else
+ bcm6328_led_mode(led, BCM6328_LED_MODE_OFF);
++
+ spin_unlock_irqrestore(led->lock, flags);
+ }
+
+@@ -140,8 +151,8 @@ static unsigned long bcm6328_blink_delay
+ {
+ unsigned long bcm6328_delay;
+
+- bcm6328_delay = delay + BCM6328_LED_INTERVAL_MS / 2;
+- bcm6328_delay = bcm6328_delay / BCM6328_LED_INTERVAL_MS;
++ bcm6328_delay = delay + BCM6328_LED_BLINK_MS / 2;
++ bcm6328_delay = bcm6328_delay / BCM6328_LED_BLINK_MS;
+ if (bcm6328_delay == 0)
+ bcm6328_delay = 1;
+
+@@ -168,28 +179,68 @@ static int bcm6328_blink_set(struct led_
+ return -EINVAL;
+ }
+
+- if (delay > BCM6328_LED_INTV_MASK) {
++ if (delay > BCM6328_LED_BLINK_MASK) {
+ dev_dbg(led_cdev->dev,
+ "fallback to soft blinking (delay > %ums)\n",
+- BCM6328_LED_INTV_MASK * BCM6328_LED_INTERVAL_MS);
++ BCM6328_LED_BLINK_MASK * BCM6328_LED_BLINK_MS);
+ return -EINVAL;
+ }
+
+ spin_lock_irqsave(led->lock, flags);
+- if (*(led->blink_leds) == 0 ||
+- *(led->blink_leds) == BIT(led->pin) ||
+- *(led->blink_delay) == delay) {
++ /*
++ * Check if any of the two configurable HW blinking intervals is
++ * available:
++ * 1. No LEDs assigned to the HW blinking interval.
++ * 2. Only this LED is assigned to the HW blinking interval.
++ * 3. LEDs with the same delay assigned.
++ */
++ if (led->blink_leds[0] == 0 ||
++ led->blink_leds[0] == BIT(led->pin) ||
++ led->blink_delay[0] == delay) {
+ unsigned long val;
+
+- *(led->blink_leds) |= BIT(led->pin);
+- *(led->blink_delay) = delay;
++ /* Add LED to the first HW blinking interval cache */
++ led->blink_leds[0] |= BIT(led->pin);
++
++ /* Remove LED from the second HW blinking interval cache */
++ led->blink_leds[1] &= ~BIT(led->pin);
+
++ /* Cache first HW blinking interval delay */
++ led->blink_delay[0] = delay;
++
++ /* Update the delay for the first HW blinking interval */
+ val = bcm6328_led_read(led->mem + BCM6328_REG_INIT);
+- val &= ~BCM6328_LED_FAST_INTV_MASK;
+- val |= (delay << BCM6328_LED_FAST_INTV_SHIFT);
++ val &= ~BCM6328_LED_BLINK1_MASK;
++ val |= (delay << BCM6328_LED_BLINK1_SHIFT);
+ bcm6328_led_write(led->mem + BCM6328_REG_INIT, val);
+
+- bcm6328_led_mode(led, BCM6328_LED_MODE_BLINK);
++ /* Set the LED to first HW blinking interval */
++ bcm6328_led_mode(led, BCM6328_LED_MODE_BLINK1);
++
++ rc = 0;
++ } else if (led->blink_leds[1] == 0 ||
++ led->blink_leds[1] == BIT(led->pin) ||
++ led->blink_delay[1] == delay) {
++ unsigned long val;
++
++ /* Remove LED from the first HW blinking interval */
++ led->blink_leds[0] &= ~BIT(led->pin);
++
++ /* Add LED to the second HW blinking interval */
++ led->blink_leds[1] |= BIT(led->pin);
++
++ /* Cache second HW blinking interval delay */
++ led->blink_delay[1] = delay;
++
++ /* Update the delay for the second HW blinking interval */
++ val = bcm6328_led_read(led->mem + BCM6328_REG_INIT);
++ val &= ~BCM6328_LED_BLINK2_MASK;
++ val |= (delay << BCM6328_LED_BLINK2_SHIFT);
++ bcm6328_led_write(led->mem + BCM6328_REG_INIT, val);
++
++ /* Set the LED to second HW blinking interval */
++ bcm6328_led_mode(led, BCM6328_LED_MODE_BLINK2);
++
+ rc = 0;
+ } else {
+ dev_dbg(led_cdev->dev,
+@@ -363,11 +414,13 @@ static int bcm6328_leds_probe(struct pla
+ if (!lock)
+ return -ENOMEM;
+
+- blink_leds = devm_kzalloc(dev, sizeof(*blink_leds), GFP_KERNEL);
++ blink_leds = devm_kcalloc(dev, BCM6328_LED_BLINK_DELAYS,
++ sizeof(*blink_leds), GFP_KERNEL);
+ if (!blink_leds)
+ return -ENOMEM;
+
+- blink_delay = devm_kzalloc(dev, sizeof(*blink_delay), GFP_KERNEL);
++ blink_delay = devm_kcalloc(dev, BCM6328_LED_BLINK_DELAYS,
++ sizeof(*blink_delay), GFP_KERNEL);
+ if (!blink_delay)
+ return -ENOMEM;
+
+++ /dev/null
---- a/drivers/leds/leds-bcm6328.c
-+++ b/drivers/leds/leds-bcm6328.c
-@@ -24,12 +24,16 @@
-
- #define BCM6328_LED_MAX_COUNT 24
- #define BCM6328_LED_DEF_DELAY 500
-+#define BCM6328_LED_INTERVAL_NUM 2
- #define BCM6328_LED_INTERVAL_MS 20
-
- #define BCM6328_LED_INTV_MASK 0x3f
--#define BCM6328_LED_FAST_INTV_SHIFT 6
--#define BCM6328_LED_FAST_INTV_MASK (BCM6328_LED_INTV_MASK << \
-- BCM6328_LED_FAST_INTV_SHIFT)
-+#define BCM6328_LED_INTV1_SHIFT 0
-+#define BCM6328_LED_INTV1_MASK (BCM6328_LED_INTV_MASK << \
-+ BCM6328_LED_INTV1_SHIFT)
-+#define BCM6328_LED_INTV2_SHIFT 6
-+#define BCM6328_LED_INTV2_MASK (BCM6328_LED_INTV_MASK << \
-+ BCM6328_LED_INTV2_SHIFT)
- #define BCM6328_SERIAL_LED_EN BIT(12)
- #define BCM6328_SERIAL_LED_MUX BIT(13)
- #define BCM6328_SERIAL_LED_CLK_NPOL BIT(14)
-@@ -45,8 +49,8 @@
-
- #define BCM6328_LED_MODE_MASK 3
- #define BCM6328_LED_MODE_ON 0
--#define BCM6328_LED_MODE_FAST 1
--#define BCM6328_LED_MODE_BLINK 2
-+#define BCM6328_LED_MODE_INTV1 1
-+#define BCM6328_LED_MODE_INTV2 2
- #define BCM6328_LED_MODE_OFF 3
- #define BCM6328_LED_SHIFT(X) ((X) << 1)
-
-@@ -127,12 +131,18 @@ static void bcm6328_led_set(struct led_c
- unsigned long flags;
-
- spin_lock_irqsave(led->lock, flags);
-- *(led->blink_leds) &= ~BIT(led->pin);
-+
-+ /* Remove LED from cached HW blinking intervals */
-+ led->blink_leds[0] &= ~BIT(led->pin);
-+ led->blink_leds[1] &= ~BIT(led->pin);
-+
-+ /* Set LED on/off */
- if ((led->active_low && value == LED_OFF) ||
- (!led->active_low && value != LED_OFF))
- bcm6328_led_mode(led, BCM6328_LED_MODE_ON);
- else
- bcm6328_led_mode(led, BCM6328_LED_MODE_OFF);
-+
- spin_unlock_irqrestore(led->lock, flags);
- }
-
-@@ -176,20 +186,59 @@ static int bcm6328_blink_set(struct led_
- }
-
- spin_lock_irqsave(led->lock, flags);
-- if (*(led->blink_leds) == 0 ||
-- *(led->blink_leds) == BIT(led->pin) ||
-- *(led->blink_delay) == delay) {
-+ /*
-+ * Check if any of the two configurable HW blinking intervals is
-+ * available:
-+ * 1. No LEDs assigned to the HW blinking interval.
-+ * 2. LEDs with the same delay assigned.
-+ */
-+ if (led->blink_leds[0] == 0 ||
-+ led->blink_leds[0] == BIT(led->pin) ||
-+ led->blink_delay[0] == delay) {
-+ unsigned long val;
-+
-+ /* Add LED to the first HW blinking interval cache */
-+ led->blink_leds[0] |= BIT(led->pin);
-+
-+ /* Remove LED from the second HW blinking interval cache */
-+ led->blink_leds[1] &= ~BIT(led->pin);
-+
-+ /* Cache the LED in the first HW blinking interval delay */
-+ led->blink_delay[0] = delay;
-+
-+ /* Update the delay for the first HW blinking interval */
-+ val = bcm6328_led_read(led->mem + BCM6328_REG_INIT);
-+ val &= ~BCM6328_LED_INTV1_MASK;
-+ val |= (delay << BCM6328_LED_INTV1_SHIFT);
-+ bcm6328_led_write(led->mem + BCM6328_REG_INIT, val);
-+
-+ /* Set the LED to first HW blinking interval */
-+ bcm6328_led_mode(led, BCM6328_LED_MODE_INTV1);
-+
-+ rc = 0;
-+ } else if (led->blink_leds[1] == 0 ||
-+ led->blink_leds[1] == BIT(led->pin) ||
-+ led->blink_delay[1] == delay) {
- unsigned long val;
-
-- *(led->blink_leds) |= BIT(led->pin);
-- *(led->blink_delay) = delay;
-+ /* Remove LED from the first HW blinking interval */
-+ led->blink_leds[0] &= ~BIT(led->pin);
-+
-+ /* Add LED to the second HW blinking interval */
-+ led->blink_leds[1] |= BIT(led->pin);
-
-+ /* Cache the LED in the first HW blinking interval delay */
-+ led->blink_delay[1] = delay;
-+
-+ /* Update the delay for the second HW blinking interval */
- val = bcm6328_led_read(led->mem + BCM6328_REG_INIT);
-- val &= ~BCM6328_LED_FAST_INTV_MASK;
-- val |= (delay << BCM6328_LED_FAST_INTV_SHIFT);
-+ val &= ~BCM6328_LED_INTV2_MASK;
-+ val |= (delay << BCM6328_LED_INTV2_SHIFT);
- bcm6328_led_write(led->mem + BCM6328_REG_INIT, val);
-
-- bcm6328_led_mode(led, BCM6328_LED_MODE_BLINK);
-+ /* Set the LED to second HW blinking interval */
-+ bcm6328_led_mode(led, BCM6328_LED_MODE_INTV2);
-+
- rc = 0;
- } else {
- dev_dbg(led_cdev->dev,
-@@ -363,11 +412,13 @@ static int bcm6328_leds_probe(struct pla
- if (!lock)
- return -ENOMEM;
-
-- blink_leds = devm_kzalloc(dev, sizeof(*blink_leds), GFP_KERNEL);
-+ blink_leds = devm_kcalloc(dev, BCM6328_LED_INTERVAL_NUM,
-+ sizeof(*blink_leds), GFP_KERNEL);
- if (!blink_leds)
- return -ENOMEM;
-
-- blink_delay = devm_kzalloc(dev, sizeof(*blink_delay), GFP_KERNEL);
-+ blink_delay = devm_kcalloc(dev, BCM6328_LED_INTERVAL_NUM,
-+ sizeof(*blink_delay), GFP_KERNEL);
- if (!blink_delay)
- return -ENOMEM;
-
projects / openwrt / openwrt.git / commitdiff