diff options
Diffstat (limited to 'target/linux/bcm63xx/patches-5.4/030-v5.9-leds-bcm6328-support-second-hw-blinking-interval.patch')
| -rw-r--r-- | target/linux/bcm63xx/patches-5.4/030-v5.9-leds-bcm6328-support-second-hw-blinking-interval.patch | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/target/linux/bcm63xx/patches-5.4/030-v5.9-leds-bcm6328-support-second-hw-blinking-interval.patch b/target/linux/bcm63xx/patches-5.4/030-v5.9-leds-bcm6328-support-second-hw-blinking-interval.patch new file mode 100644 index 0000000000..9bf6b0fc87 --- /dev/null +++ b/target/linux/bcm63xx/patches-5.4/030-v5.9-leds-bcm6328-support-second-hw-blinking-interval.patch @@ -0,0 +1,188 @@ +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; + |