From: Rafał Miłecki Date: Sun, 17 Jul 2022 13:10:01 +0000 (+0200) Subject: kernel: backport LEDs driver for BCMBCA devices X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=d9ab1e56d8d16182bd292f393c012d7e6873ed89;p=openwrt%2Fstaging%2Fnbd.git kernel: backport LEDs driver for BCMBCA devices This includes BCM63xx and BCM4908 families. Signed-off-by: Rafał Miłecki --- diff --git a/target/linux/bcm4908/config-5.10 b/target/linux/bcm4908/config-5.10 index 8ecf355250..5a277147dc 100644 --- a/target/linux/bcm4908/config-5.10 +++ b/target/linux/bcm4908/config-5.10 @@ -118,6 +118,7 @@ CONFIG_IRQ_DOMAIN=y CONFIG_IRQ_DOMAIN_HIERARCHY=y CONFIG_IRQ_FORCED_THREADING=y CONFIG_IRQ_WORK=y +CONFIG_LEDS_BCM63138=y CONFIG_LEDS_GPIO=y CONFIG_LIBFDT=y CONFIG_LOCK_DEBUGGING_SUPPORT=y diff --git a/target/linux/bcm53xx/config-5.10 b/target/linux/bcm53xx/config-5.10 index 3a1f09219a..4c5047b81b 100644 --- a/target/linux/bcm53xx/config-5.10 +++ b/target/linux/bcm53xx/config-5.10 @@ -172,6 +172,7 @@ CONFIG_IRQ_DOMAIN=y CONFIG_IRQ_DOMAIN_HIERARCHY=y CONFIG_IRQ_FORCED_THREADING=y CONFIG_IRQ_WORK=y +# CONFIG_LEDS_BCM63138 is not set CONFIG_LIBFDT=y CONFIG_LOCK_DEBUGGING_SUPPORT=y CONFIG_LOCK_SPIN_ON_OWNER=y diff --git a/target/linux/bcm63xx/config-5.10 b/target/linux/bcm63xx/config-5.10 index 8d26ce5bba..bfed055c29 100644 --- a/target/linux/bcm63xx/config-5.10 +++ b/target/linux/bcm63xx/config-5.10 @@ -104,6 +104,7 @@ CONFIG_IRQ_MIPS_CPU=y CONFIG_IRQ_WORK=y CONFIG_KEXEC=y CONFIG_KEXEC_CORE=y +# CONFIG_LEDS_BCM63138 is not set CONFIG_LEDS_BCM6328=y CONFIG_LEDS_BCM6358=y CONFIG_LEDS_GPIO=y diff --git a/target/linux/bcm63xx/config-5.15 b/target/linux/bcm63xx/config-5.15 index 46e2ccfe37..4bbe984f5f 100644 --- a/target/linux/bcm63xx/config-5.15 +++ b/target/linux/bcm63xx/config-5.15 @@ -109,6 +109,7 @@ CONFIG_IRQ_MIPS_CPU=y CONFIG_IRQ_WORK=y CONFIG_KEXEC=y CONFIG_KEXEC_CORE=y +# CONFIG_LEDS_BCM63138 is not set CONFIG_LEDS_BCM6328=y CONFIG_LEDS_BCM6358=y CONFIG_LEDS_GPIO=y diff --git a/target/linux/generic/backport-5.10/845-v5.20-0001-dt-bindings-leds-add-Broadcom-s-BCM63138-controller.patch b/target/linux/generic/backport-5.10/845-v5.20-0001-dt-bindings-leds-add-Broadcom-s-BCM63138-controller.patch new file mode 100644 index 0000000000..b1072ce640 --- /dev/null +++ b/target/linux/generic/backport-5.10/845-v5.20-0001-dt-bindings-leds-add-Broadcom-s-BCM63138-controller.patch @@ -0,0 +1,125 @@ +From 13344f8ce8a0d98aa7f5d69ce3b47393c73a343b Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= +Date: Mon, 27 Dec 2021 15:59:04 +0100 +Subject: [PATCH] dt-bindings: leds: add Broadcom's BCM63138 controller +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Broadcom used 2 LEDs hardware blocks for their BCM63xx SoCs: +1. Older one (BCM6318, BCM6328, BCM6362, BCM63268, BCM6838) +2. Newer one (BCM6848, BCM6858, BCM63138, BCM63148, BCM63381, BCM68360) + +The newer one was also later also used on BCM4908 SoC. + +Old block is already documented in the leds-bcm6328.yaml. This binding +documents the new one which uses different registers & programming. It's +first used in BCM63138 thus the binding name. + +Signed-off-by: Rafał Miłecki +Reviewed-by: Rob Herring +Reviewed-by: Florian Fainelli +Signed-off-by: Pavel Machek +--- + .../bindings/leds/leds-bcm63138.yaml | 95 +++++++++++++++++++ + 1 file changed, 95 insertions(+) + create mode 100644 Documentation/devicetree/bindings/leds/leds-bcm63138.yaml + +--- /dev/null ++++ b/Documentation/devicetree/bindings/leds/leds-bcm63138.yaml +@@ -0,0 +1,95 @@ ++# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause ++%YAML 1.2 ++--- ++$id: http://devicetree.org/schemas/leds/leds-bcm63138.yaml# ++$schema: http://devicetree.org/meta-schemas/core.yaml# ++ ++title: Broadcom's BCM63138 LEDs controller ++ ++maintainers: ++ - Rafał Miłecki ++ ++description: | ++ This LEDs controller was first used on BCM63138 and later reused on BCM4908, ++ BCM6848, BCM6858, BCM63138, BCM63148, BCM63381 and BCM68360 SoCs. ++ ++ It supports up to 32 LEDs that can be connected parallelly or serially. It ++ also includes limited support for hardware blinking. ++ ++ Binding serially connected LEDs isn't documented yet. ++ ++properties: ++ compatible: ++ oneOf: ++ - items: ++ - enum: ++ - brcm,bcm4908-leds ++ - brcm,bcm6848-leds ++ - brcm,bcm6858-leds ++ - brcm,bcm63148-leds ++ - brcm,bcm63381-leds ++ - brcm,bcm68360-leds ++ - const: brcm,bcm63138-leds ++ - const: brcm,bcm63138-leds ++ ++ reg: ++ maxItems: 1 ++ ++ "#address-cells": ++ const: 1 ++ ++ "#size-cells": ++ const: 0 ++ ++patternProperties: ++ "^led@[a-f0-9]+$": ++ type: object ++ ++ $ref: common.yaml# ++ ++ properties: ++ reg: ++ maxItems: 1 ++ description: LED pin number ++ ++ active-low: ++ type: boolean ++ description: Makes LED active low. ++ ++ required: ++ - reg ++ ++ unevaluatedProperties: false ++ ++required: ++ - reg ++ - "#address-cells" ++ - "#size-cells" ++ ++additionalProperties: false ++ ++examples: ++ - | ++ #include ++ ++ leds@ff800800 { ++ compatible = "brcm,bcm4908-leds", "brcm,bcm63138-leds"; ++ reg = <0xff800800 0xdc>; ++ ++ #address-cells = <1>; ++ #size-cells = <0>; ++ ++ led@0 { ++ reg = <0x0>; ++ function = LED_FUNCTION_POWER; ++ color = ; ++ default-state = "on"; ++ }; ++ ++ led@3 { ++ reg = <0x3>; ++ function = LED_FUNCTION_STATUS; ++ color = ; ++ active-low; ++ }; ++ }; diff --git a/target/linux/generic/backport-5.10/845-v5.20-0002-leds-bcm63138-add-support-for-BCM63138-controller.patch b/target/linux/generic/backport-5.10/845-v5.20-0002-leds-bcm63138-add-support-for-BCM63138-controller.patch new file mode 100644 index 0000000000..8ebe8f180b --- /dev/null +++ b/target/linux/generic/backport-5.10/845-v5.20-0002-leds-bcm63138-add-support-for-BCM63138-controller.patch @@ -0,0 +1,371 @@ +From a0ba692072d89075d0a75c7ad9df31f2c1ee9a1c Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= +Date: Mon, 27 Dec 2021 15:59:05 +0100 +Subject: [PATCH] leds: bcm63138: add support for BCM63138 controller +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +It's a new controller first introduced in BCM63138 SoC. Later it was +also used in BCM4908, some BCM68xx and some BCM63xxx SoCs. + +Signed-off-by: Rafał Miłecki +Reviewed-by: Florian Fainelli +Signed-off-by: Pavel Machek +--- + drivers/leds/blink/Kconfig | 12 ++ + drivers/leds/blink/Makefile | 1 + + drivers/leds/blink/leds-bcm63138.c | 308 +++++++++++++++++++++++++++++ + 3 files changed, 321 insertions(+) + create mode 100644 drivers/leds/blink/leds-bcm63138.c + +--- /dev/null ++++ b/drivers/leds/blink/Kconfig +@@ -0,0 +1,11 @@ ++config LEDS_BCM63138 ++ tristate "LED Support for Broadcom BCM63138 SoC" ++ depends on LEDS_CLASS ++ depends on ARCH_BCM4908 || ARCH_BCM_5301X || BCM63XX || COMPILE_TEST ++ depends on HAS_IOMEM ++ depends on OF ++ default ARCH_BCM4908 ++ help ++ This option enables support for LED controller that is part of ++ BCM63138 SoC. The same hardware block is known to be also used ++ in BCM4908, BCM6848, BCM6858, BCM63148, BCM63381 and BCM68360. +--- /dev/null ++++ b/drivers/leds/blink/Makefile +@@ -0,0 +1,2 @@ ++# SPDX-License-Identifier: GPL-2.0 ++obj-$(CONFIG_LEDS_BCM63138) += leds-bcm63138.o +--- /dev/null ++++ b/drivers/leds/blink/leds-bcm63138.c +@@ -0,0 +1,308 @@ ++// SPDX-License-Identifier: GPL-2.0-only ++/* ++ * Copyright (C) 2021 Rafał Miłecki ++ */ ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++ ++#define BCM63138_MAX_LEDS 32 ++#define BCM63138_MAX_BRIGHTNESS 9 ++ ++#define BCM63138_LED_BITS 4 /* how many bits control a single LED */ ++#define BCM63138_LED_MASK ((1 << BCM63138_LED_BITS) - 1) /* 0xf */ ++#define BCM63138_LEDS_PER_REG (32 / BCM63138_LED_BITS) /* 8 */ ++ ++#define BCM63138_GLB_CTRL 0x00 ++#define BCM63138_GLB_CTRL_SERIAL_LED_DATA_PPOL 0x00000002 ++#define BCM63138_GLB_CTRL_SERIAL_LED_EN_POL 0x00000008 ++#define BCM63138_MASK 0x04 ++#define BCM63138_HW_LED_EN 0x08 ++#define BCM63138_SERIAL_LED_SHIFT_SEL 0x0c ++#define BCM63138_FLASH_RATE_CTRL1 0x10 ++#define BCM63138_FLASH_RATE_CTRL2 0x14 ++#define BCM63138_FLASH_RATE_CTRL3 0x18 ++#define BCM63138_FLASH_RATE_CTRL4 0x1c ++#define BCM63138_BRIGHT_CTRL1 0x20 ++#define BCM63138_BRIGHT_CTRL2 0x24 ++#define BCM63138_BRIGHT_CTRL3 0x28 ++#define BCM63138_BRIGHT_CTRL4 0x2c ++#define BCM63138_POWER_LED_CFG 0x30 ++#define BCM63138_HW_POLARITY 0xb4 ++#define BCM63138_SW_DATA 0xb8 ++#define BCM63138_SW_POLARITY 0xbc ++#define BCM63138_PARALLEL_LED_POLARITY 0xc0 ++#define BCM63138_SERIAL_LED_POLARITY 0xc4 ++#define BCM63138_HW_LED_STATUS 0xc8 ++#define BCM63138_FLASH_CTRL_STATUS 0xcc ++#define BCM63138_FLASH_BRT_CTRL 0xd0 ++#define BCM63138_FLASH_P_LED_OUT_STATUS 0xd4 ++#define BCM63138_FLASH_S_LED_OUT_STATUS 0xd8 ++ ++struct bcm63138_leds { ++ struct device *dev; ++ void __iomem *base; ++ spinlock_t lock; ++}; ++ ++struct bcm63138_led { ++ struct bcm63138_leds *leds; ++ struct led_classdev cdev; ++ u32 pin; ++ bool active_low; ++}; ++ ++/* ++ * I/O access ++ */ ++ ++static void bcm63138_leds_write(struct bcm63138_leds *leds, unsigned int reg, ++ u32 data) ++{ ++ writel(data, leds->base + reg); ++} ++ ++static unsigned long bcm63138_leds_read(struct bcm63138_leds *leds, ++ unsigned int reg) ++{ ++ return readl(leds->base + reg); ++} ++ ++static void bcm63138_leds_update_bits(struct bcm63138_leds *leds, ++ unsigned int reg, u32 mask, u32 val) ++{ ++ WARN_ON(val & ~mask); ++ ++ bcm63138_leds_write(leds, reg, (bcm63138_leds_read(leds, reg) & ~mask) | (val & mask)); ++} ++ ++/* ++ * Helpers ++ */ ++ ++static void bcm63138_leds_set_flash_rate(struct bcm63138_leds *leds, ++ struct bcm63138_led *led, ++ u8 value) ++{ ++ int reg_offset = (led->pin >> fls((BCM63138_LEDS_PER_REG - 1))) * 4; ++ int shift = (led->pin & (BCM63138_LEDS_PER_REG - 1)) * BCM63138_LED_BITS; ++ ++ bcm63138_leds_update_bits(leds, BCM63138_FLASH_RATE_CTRL1 + reg_offset, ++ BCM63138_LED_MASK << shift, value << shift); ++} ++ ++static void bcm63138_leds_set_bright(struct bcm63138_leds *leds, ++ struct bcm63138_led *led, ++ u8 value) ++{ ++ int reg_offset = (led->pin >> fls((BCM63138_LEDS_PER_REG - 1))) * 4; ++ int shift = (led->pin & (BCM63138_LEDS_PER_REG - 1)) * BCM63138_LED_BITS; ++ ++ bcm63138_leds_update_bits(leds, BCM63138_BRIGHT_CTRL1 + reg_offset, ++ BCM63138_LED_MASK << shift, value << shift); ++} ++ ++static void bcm63138_leds_enable_led(struct bcm63138_leds *leds, ++ struct bcm63138_led *led, ++ enum led_brightness value) ++{ ++ u32 bit = BIT(led->pin); ++ ++ bcm63138_leds_update_bits(leds, BCM63138_SW_DATA, bit, ++ value == LED_OFF ? 0 : bit); ++} ++ ++/* ++ * API callbacks ++ */ ++ ++static void bcm63138_leds_brightness_set(struct led_classdev *led_cdev, ++ enum led_brightness value) ++{ ++ struct bcm63138_led *led = container_of(led_cdev, struct bcm63138_led, cdev); ++ struct bcm63138_leds *leds = led->leds; ++ unsigned long flags; ++ ++ spin_lock_irqsave(&leds->lock, flags); ++ ++ bcm63138_leds_enable_led(leds, led, value); ++ if (!value) ++ bcm63138_leds_set_flash_rate(leds, led, 0); ++ else ++ bcm63138_leds_set_bright(leds, led, value); ++ ++ spin_unlock_irqrestore(&leds->lock, flags); ++} ++ ++static int bcm63138_leds_blink_set(struct led_classdev *led_cdev, ++ unsigned long *delay_on, ++ unsigned long *delay_off) ++{ ++ struct bcm63138_led *led = container_of(led_cdev, struct bcm63138_led, cdev); ++ struct bcm63138_leds *leds = led->leds; ++ unsigned long flags; ++ u8 value; ++ ++ if (!*delay_on && !*delay_off) { ++ *delay_on = 640; ++ *delay_off = 640; ++ } ++ ++ if (*delay_on != *delay_off) { ++ dev_dbg(led_cdev->dev, "Blinking at unequal delays is not supported\n"); ++ return -EINVAL; ++ } ++ ++ switch (*delay_on) { ++ case 1152 ... 1408: /* 1280 ms ± 10% */ ++ value = 0x7; ++ break; ++ case 576 ... 704: /* 640 ms ± 10% */ ++ value = 0x6; ++ break; ++ case 288 ... 352: /* 320 ms ± 10% */ ++ value = 0x5; ++ break; ++ case 126 ... 154: /* 140 ms ± 10% */ ++ value = 0x4; ++ break; ++ case 59 ... 72: /* 65 ms ± 10% */ ++ value = 0x3; ++ break; ++ default: ++ dev_dbg(led_cdev->dev, "Blinking delay value %lu is unsupported\n", ++ *delay_on); ++ return -EINVAL; ++ } ++ ++ spin_lock_irqsave(&leds->lock, flags); ++ ++ bcm63138_leds_enable_led(leds, led, BCM63138_MAX_BRIGHTNESS); ++ bcm63138_leds_set_flash_rate(leds, led, value); ++ ++ spin_unlock_irqrestore(&leds->lock, flags); ++ ++ return 0; ++} ++ ++/* ++ * LED driver ++ */ ++ ++static void bcm63138_leds_create_led(struct bcm63138_leds *leds, ++ struct device_node *np) ++{ ++ struct led_init_data init_data = { ++ .fwnode = of_fwnode_handle(np), ++ }; ++ struct device *dev = leds->dev; ++ struct bcm63138_led *led; ++ struct pinctrl *pinctrl; ++ u32 bit; ++ int err; ++ ++ led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL); ++ if (!led) { ++ dev_err(dev, "Failed to alloc LED\n"); ++ return; ++ } ++ ++ led->leds = leds; ++ ++ if (of_property_read_u32(np, "reg", &led->pin)) { ++ dev_err(dev, "Missing \"reg\" property in %pOF\n", np); ++ goto err_free; ++ } ++ ++ if (led->pin >= BCM63138_MAX_LEDS) { ++ dev_err(dev, "Invalid \"reg\" value %d\n", led->pin); ++ goto err_free; ++ } ++ ++ led->active_low = of_property_read_bool(np, "active-low"); ++ ++ led->cdev.max_brightness = BCM63138_MAX_BRIGHTNESS; ++ led->cdev.brightness_set = bcm63138_leds_brightness_set; ++ led->cdev.blink_set = bcm63138_leds_blink_set; ++ ++ err = devm_led_classdev_register_ext(dev, &led->cdev, &init_data); ++ if (err) { ++ dev_err(dev, "Failed to register LED %pOF: %d\n", np, err); ++ goto err_free; ++ } ++ ++ pinctrl = devm_pinctrl_get_select_default(led->cdev.dev); ++ if (IS_ERR(pinctrl) && PTR_ERR(pinctrl) != -ENODEV) { ++ dev_warn(led->cdev.dev, "Failed to select %pOF pinctrl: %ld\n", ++ np, PTR_ERR(pinctrl)); ++ } ++ ++ bit = BIT(led->pin); ++ bcm63138_leds_update_bits(leds, BCM63138_PARALLEL_LED_POLARITY, bit, ++ led->active_low ? 0 : bit); ++ bcm63138_leds_update_bits(leds, BCM63138_HW_LED_EN, bit, 0); ++ bcm63138_leds_set_flash_rate(leds, led, 0); ++ bcm63138_leds_enable_led(leds, led, led->cdev.brightness); ++ ++ return; ++ ++err_free: ++ devm_kfree(dev, led); ++} ++ ++static int bcm63138_leds_probe(struct platform_device *pdev) ++{ ++ struct device_node *np = dev_of_node(&pdev->dev); ++ struct device *dev = &pdev->dev; ++ struct bcm63138_leds *leds; ++ struct device_node *child; ++ ++ leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL); ++ if (!leds) ++ return -ENOMEM; ++ ++ leds->dev = dev; ++ ++ leds->base = devm_platform_ioremap_resource(pdev, 0); ++ if (IS_ERR(leds->base)) ++ return PTR_ERR(leds->base); ++ ++ spin_lock_init(&leds->lock); ++ ++ bcm63138_leds_write(leds, BCM63138_GLB_CTRL, ++ BCM63138_GLB_CTRL_SERIAL_LED_DATA_PPOL | ++ BCM63138_GLB_CTRL_SERIAL_LED_EN_POL); ++ bcm63138_leds_write(leds, BCM63138_HW_LED_EN, 0); ++ bcm63138_leds_write(leds, BCM63138_SERIAL_LED_POLARITY, 0); ++ bcm63138_leds_write(leds, BCM63138_PARALLEL_LED_POLARITY, 0); ++ ++ for_each_available_child_of_node(np, child) { ++ bcm63138_leds_create_led(leds, child); ++ } ++ ++ return 0; ++} ++ ++static const struct of_device_id bcm63138_leds_of_match_table[] = { ++ { .compatible = "brcm,bcm63138-leds", }, ++ { }, ++}; ++ ++static struct platform_driver bcm63138_leds_driver = { ++ .probe = bcm63138_leds_probe, ++ .driver = { ++ .name = "leds-bcm63xxx", ++ .of_match_table = bcm63138_leds_of_match_table, ++ }, ++}; ++ ++module_platform_driver(bcm63138_leds_driver); ++ ++MODULE_AUTHOR("Rafał Miłecki"); ++MODULE_LICENSE("GPL"); ++MODULE_DEVICE_TABLE(of, bcm63138_leds_of_match_table); +--- a/drivers/leds/Kconfig ++++ b/drivers/leds/Kconfig +@@ -929,6 +929,8 @@ config LEDS_ACER_A500 + This option enables support for the Power Button LED of + Acer Iconia Tab A500. + ++source "drivers/leds/blink/Kconfig" ++ + comment "LED Triggers" + source "drivers/leds/trigger/Kconfig" + +--- a/drivers/leds/Makefile ++++ b/drivers/leds/Makefile +@@ -105,3 +105,6 @@ obj-$(CONFIG_LEDS_USER) += uleds.o + + # LED Triggers + obj-$(CONFIG_LEDS_TRIGGERS) += trigger/ ++ ++# LED Blink ++obj-y += blink/ diff --git a/target/linux/generic/backport-5.15/800-v5.20-0001-dt-bindings-leds-add-Broadcom-s-BCM63138-controller.patch b/target/linux/generic/backport-5.15/800-v5.20-0001-dt-bindings-leds-add-Broadcom-s-BCM63138-controller.patch new file mode 100644 index 0000000000..b1072ce640 --- /dev/null +++ b/target/linux/generic/backport-5.15/800-v5.20-0001-dt-bindings-leds-add-Broadcom-s-BCM63138-controller.patch @@ -0,0 +1,125 @@ +From 13344f8ce8a0d98aa7f5d69ce3b47393c73a343b Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= +Date: Mon, 27 Dec 2021 15:59:04 +0100 +Subject: [PATCH] dt-bindings: leds: add Broadcom's BCM63138 controller +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Broadcom used 2 LEDs hardware blocks for their BCM63xx SoCs: +1. Older one (BCM6318, BCM6328, BCM6362, BCM63268, BCM6838) +2. Newer one (BCM6848, BCM6858, BCM63138, BCM63148, BCM63381, BCM68360) + +The newer one was also later also used on BCM4908 SoC. + +Old block is already documented in the leds-bcm6328.yaml. This binding +documents the new one which uses different registers & programming. It's +first used in BCM63138 thus the binding name. + +Signed-off-by: Rafał Miłecki +Reviewed-by: Rob Herring +Reviewed-by: Florian Fainelli +Signed-off-by: Pavel Machek +--- + .../bindings/leds/leds-bcm63138.yaml | 95 +++++++++++++++++++ + 1 file changed, 95 insertions(+) + create mode 100644 Documentation/devicetree/bindings/leds/leds-bcm63138.yaml + +--- /dev/null ++++ b/Documentation/devicetree/bindings/leds/leds-bcm63138.yaml +@@ -0,0 +1,95 @@ ++# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause ++%YAML 1.2 ++--- ++$id: http://devicetree.org/schemas/leds/leds-bcm63138.yaml# ++$schema: http://devicetree.org/meta-schemas/core.yaml# ++ ++title: Broadcom's BCM63138 LEDs controller ++ ++maintainers: ++ - Rafał Miłecki ++ ++description: | ++ This LEDs controller was first used on BCM63138 and later reused on BCM4908, ++ BCM6848, BCM6858, BCM63138, BCM63148, BCM63381 and BCM68360 SoCs. ++ ++ It supports up to 32 LEDs that can be connected parallelly or serially. It ++ also includes limited support for hardware blinking. ++ ++ Binding serially connected LEDs isn't documented yet. ++ ++properties: ++ compatible: ++ oneOf: ++ - items: ++ - enum: ++ - brcm,bcm4908-leds ++ - brcm,bcm6848-leds ++ - brcm,bcm6858-leds ++ - brcm,bcm63148-leds ++ - brcm,bcm63381-leds ++ - brcm,bcm68360-leds ++ - const: brcm,bcm63138-leds ++ - const: brcm,bcm63138-leds ++ ++ reg: ++ maxItems: 1 ++ ++ "#address-cells": ++ const: 1 ++ ++ "#size-cells": ++ const: 0 ++ ++patternProperties: ++ "^led@[a-f0-9]+$": ++ type: object ++ ++ $ref: common.yaml# ++ ++ properties: ++ reg: ++ maxItems: 1 ++ description: LED pin number ++ ++ active-low: ++ type: boolean ++ description: Makes LED active low. ++ ++ required: ++ - reg ++ ++ unevaluatedProperties: false ++ ++required: ++ - reg ++ - "#address-cells" ++ - "#size-cells" ++ ++additionalProperties: false ++ ++examples: ++ - | ++ #include ++ ++ leds@ff800800 { ++ compatible = "brcm,bcm4908-leds", "brcm,bcm63138-leds"; ++ reg = <0xff800800 0xdc>; ++ ++ #address-cells = <1>; ++ #size-cells = <0>; ++ ++ led@0 { ++ reg = <0x0>; ++ function = LED_FUNCTION_POWER; ++ color = ; ++ default-state = "on"; ++ }; ++ ++ led@3 { ++ reg = <0x3>; ++ function = LED_FUNCTION_STATUS; ++ color = ; ++ active-low; ++ }; ++ }; diff --git a/target/linux/generic/backport-5.15/800-v5.20-0002-leds-bcm63138-add-support-for-BCM63138-controller.patch b/target/linux/generic/backport-5.15/800-v5.20-0002-leds-bcm63138-add-support-for-BCM63138-controller.patch new file mode 100644 index 0000000000..376584574f --- /dev/null +++ b/target/linux/generic/backport-5.15/800-v5.20-0002-leds-bcm63138-add-support-for-BCM63138-controller.patch @@ -0,0 +1,356 @@ +From a0ba692072d89075d0a75c7ad9df31f2c1ee9a1c Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= +Date: Mon, 27 Dec 2021 15:59:05 +0100 +Subject: [PATCH] leds: bcm63138: add support for BCM63138 controller +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +It's a new controller first introduced in BCM63138 SoC. Later it was +also used in BCM4908, some BCM68xx and some BCM63xxx SoCs. + +Signed-off-by: Rafał Miłecki +Reviewed-by: Florian Fainelli +Signed-off-by: Pavel Machek +--- + drivers/leds/blink/Kconfig | 12 ++ + drivers/leds/blink/Makefile | 1 + + drivers/leds/blink/leds-bcm63138.c | 308 +++++++++++++++++++++++++++++ + 3 files changed, 321 insertions(+) + create mode 100644 drivers/leds/blink/leds-bcm63138.c + +--- a/drivers/leds/blink/Kconfig ++++ b/drivers/leds/blink/Kconfig +@@ -1,3 +1,15 @@ ++config LEDS_BCM63138 ++ tristate "LED Support for Broadcom BCM63138 SoC" ++ depends on LEDS_CLASS ++ depends on ARCH_BCM4908 || ARCH_BCM_5301X || BCM63XX || COMPILE_TEST ++ depends on HAS_IOMEM ++ depends on OF ++ default ARCH_BCM4908 ++ help ++ This option enables support for LED controller that is part of ++ BCM63138 SoC. The same hardware block is known to be also used ++ in BCM4908, BCM6848, BCM6858, BCM63148, BCM63381 and BCM68360. ++ + config LEDS_LGM + tristate "LED support for LGM SoC series" + depends on X86 || COMPILE_TEST +--- a/drivers/leds/blink/Makefile ++++ b/drivers/leds/blink/Makefile +@@ -1,2 +1,3 @@ + # SPDX-License-Identifier: GPL-2.0 ++obj-$(CONFIG_LEDS_BCM63138) += leds-bcm63138.o + obj-$(CONFIG_LEDS_LGM) += leds-lgm-sso.o +--- /dev/null ++++ b/drivers/leds/blink/leds-bcm63138.c +@@ -0,0 +1,308 @@ ++// SPDX-License-Identifier: GPL-2.0-only ++/* ++ * Copyright (C) 2021 Rafał Miłecki ++ */ ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++ ++#define BCM63138_MAX_LEDS 32 ++#define BCM63138_MAX_BRIGHTNESS 9 ++ ++#define BCM63138_LED_BITS 4 /* how many bits control a single LED */ ++#define BCM63138_LED_MASK ((1 << BCM63138_LED_BITS) - 1) /* 0xf */ ++#define BCM63138_LEDS_PER_REG (32 / BCM63138_LED_BITS) /* 8 */ ++ ++#define BCM63138_GLB_CTRL 0x00 ++#define BCM63138_GLB_CTRL_SERIAL_LED_DATA_PPOL 0x00000002 ++#define BCM63138_GLB_CTRL_SERIAL_LED_EN_POL 0x00000008 ++#define BCM63138_MASK 0x04 ++#define BCM63138_HW_LED_EN 0x08 ++#define BCM63138_SERIAL_LED_SHIFT_SEL 0x0c ++#define BCM63138_FLASH_RATE_CTRL1 0x10 ++#define BCM63138_FLASH_RATE_CTRL2 0x14 ++#define BCM63138_FLASH_RATE_CTRL3 0x18 ++#define BCM63138_FLASH_RATE_CTRL4 0x1c ++#define BCM63138_BRIGHT_CTRL1 0x20 ++#define BCM63138_BRIGHT_CTRL2 0x24 ++#define BCM63138_BRIGHT_CTRL3 0x28 ++#define BCM63138_BRIGHT_CTRL4 0x2c ++#define BCM63138_POWER_LED_CFG 0x30 ++#define BCM63138_HW_POLARITY 0xb4 ++#define BCM63138_SW_DATA 0xb8 ++#define BCM63138_SW_POLARITY 0xbc ++#define BCM63138_PARALLEL_LED_POLARITY 0xc0 ++#define BCM63138_SERIAL_LED_POLARITY 0xc4 ++#define BCM63138_HW_LED_STATUS 0xc8 ++#define BCM63138_FLASH_CTRL_STATUS 0xcc ++#define BCM63138_FLASH_BRT_CTRL 0xd0 ++#define BCM63138_FLASH_P_LED_OUT_STATUS 0xd4 ++#define BCM63138_FLASH_S_LED_OUT_STATUS 0xd8 ++ ++struct bcm63138_leds { ++ struct device *dev; ++ void __iomem *base; ++ spinlock_t lock; ++}; ++ ++struct bcm63138_led { ++ struct bcm63138_leds *leds; ++ struct led_classdev cdev; ++ u32 pin; ++ bool active_low; ++}; ++ ++/* ++ * I/O access ++ */ ++ ++static void bcm63138_leds_write(struct bcm63138_leds *leds, unsigned int reg, ++ u32 data) ++{ ++ writel(data, leds->base + reg); ++} ++ ++static unsigned long bcm63138_leds_read(struct bcm63138_leds *leds, ++ unsigned int reg) ++{ ++ return readl(leds->base + reg); ++} ++ ++static void bcm63138_leds_update_bits(struct bcm63138_leds *leds, ++ unsigned int reg, u32 mask, u32 val) ++{ ++ WARN_ON(val & ~mask); ++ ++ bcm63138_leds_write(leds, reg, (bcm63138_leds_read(leds, reg) & ~mask) | (val & mask)); ++} ++ ++/* ++ * Helpers ++ */ ++ ++static void bcm63138_leds_set_flash_rate(struct bcm63138_leds *leds, ++ struct bcm63138_led *led, ++ u8 value) ++{ ++ int reg_offset = (led->pin >> fls((BCM63138_LEDS_PER_REG - 1))) * 4; ++ int shift = (led->pin & (BCM63138_LEDS_PER_REG - 1)) * BCM63138_LED_BITS; ++ ++ bcm63138_leds_update_bits(leds, BCM63138_FLASH_RATE_CTRL1 + reg_offset, ++ BCM63138_LED_MASK << shift, value << shift); ++} ++ ++static void bcm63138_leds_set_bright(struct bcm63138_leds *leds, ++ struct bcm63138_led *led, ++ u8 value) ++{ ++ int reg_offset = (led->pin >> fls((BCM63138_LEDS_PER_REG - 1))) * 4; ++ int shift = (led->pin & (BCM63138_LEDS_PER_REG - 1)) * BCM63138_LED_BITS; ++ ++ bcm63138_leds_update_bits(leds, BCM63138_BRIGHT_CTRL1 + reg_offset, ++ BCM63138_LED_MASK << shift, value << shift); ++} ++ ++static void bcm63138_leds_enable_led(struct bcm63138_leds *leds, ++ struct bcm63138_led *led, ++ enum led_brightness value) ++{ ++ u32 bit = BIT(led->pin); ++ ++ bcm63138_leds_update_bits(leds, BCM63138_SW_DATA, bit, ++ value == LED_OFF ? 0 : bit); ++} ++ ++/* ++ * API callbacks ++ */ ++ ++static void bcm63138_leds_brightness_set(struct led_classdev *led_cdev, ++ enum led_brightness value) ++{ ++ struct bcm63138_led *led = container_of(led_cdev, struct bcm63138_led, cdev); ++ struct bcm63138_leds *leds = led->leds; ++ unsigned long flags; ++ ++ spin_lock_irqsave(&leds->lock, flags); ++ ++ bcm63138_leds_enable_led(leds, led, value); ++ if (!value) ++ bcm63138_leds_set_flash_rate(leds, led, 0); ++ else ++ bcm63138_leds_set_bright(leds, led, value); ++ ++ spin_unlock_irqrestore(&leds->lock, flags); ++} ++ ++static int bcm63138_leds_blink_set(struct led_classdev *led_cdev, ++ unsigned long *delay_on, ++ unsigned long *delay_off) ++{ ++ struct bcm63138_led *led = container_of(led_cdev, struct bcm63138_led, cdev); ++ struct bcm63138_leds *leds = led->leds; ++ unsigned long flags; ++ u8 value; ++ ++ if (!*delay_on && !*delay_off) { ++ *delay_on = 640; ++ *delay_off = 640; ++ } ++ ++ if (*delay_on != *delay_off) { ++ dev_dbg(led_cdev->dev, "Blinking at unequal delays is not supported\n"); ++ return -EINVAL; ++ } ++ ++ switch (*delay_on) { ++ case 1152 ... 1408: /* 1280 ms ± 10% */ ++ value = 0x7; ++ break; ++ case 576 ... 704: /* 640 ms ± 10% */ ++ value = 0x6; ++ break; ++ case 288 ... 352: /* 320 ms ± 10% */ ++ value = 0x5; ++ break; ++ case 126 ... 154: /* 140 ms ± 10% */ ++ value = 0x4; ++ break; ++ case 59 ... 72: /* 65 ms ± 10% */ ++ value = 0x3; ++ break; ++ default: ++ dev_dbg(led_cdev->dev, "Blinking delay value %lu is unsupported\n", ++ *delay_on); ++ return -EINVAL; ++ } ++ ++ spin_lock_irqsave(&leds->lock, flags); ++ ++ bcm63138_leds_enable_led(leds, led, BCM63138_MAX_BRIGHTNESS); ++ bcm63138_leds_set_flash_rate(leds, led, value); ++ ++ spin_unlock_irqrestore(&leds->lock, flags); ++ ++ return 0; ++} ++ ++/* ++ * LED driver ++ */ ++ ++static void bcm63138_leds_create_led(struct bcm63138_leds *leds, ++ struct device_node *np) ++{ ++ struct led_init_data init_data = { ++ .fwnode = of_fwnode_handle(np), ++ }; ++ struct device *dev = leds->dev; ++ struct bcm63138_led *led; ++ struct pinctrl *pinctrl; ++ u32 bit; ++ int err; ++ ++ led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL); ++ if (!led) { ++ dev_err(dev, "Failed to alloc LED\n"); ++ return; ++ } ++ ++ led->leds = leds; ++ ++ if (of_property_read_u32(np, "reg", &led->pin)) { ++ dev_err(dev, "Missing \"reg\" property in %pOF\n", np); ++ goto err_free; ++ } ++ ++ if (led->pin >= BCM63138_MAX_LEDS) { ++ dev_err(dev, "Invalid \"reg\" value %d\n", led->pin); ++ goto err_free; ++ } ++ ++ led->active_low = of_property_read_bool(np, "active-low"); ++ ++ led->cdev.max_brightness = BCM63138_MAX_BRIGHTNESS; ++ led->cdev.brightness_set = bcm63138_leds_brightness_set; ++ led->cdev.blink_set = bcm63138_leds_blink_set; ++ ++ err = devm_led_classdev_register_ext(dev, &led->cdev, &init_data); ++ if (err) { ++ dev_err(dev, "Failed to register LED %pOF: %d\n", np, err); ++ goto err_free; ++ } ++ ++ pinctrl = devm_pinctrl_get_select_default(led->cdev.dev); ++ if (IS_ERR(pinctrl) && PTR_ERR(pinctrl) != -ENODEV) { ++ dev_warn(led->cdev.dev, "Failed to select %pOF pinctrl: %ld\n", ++ np, PTR_ERR(pinctrl)); ++ } ++ ++ bit = BIT(led->pin); ++ bcm63138_leds_update_bits(leds, BCM63138_PARALLEL_LED_POLARITY, bit, ++ led->active_low ? 0 : bit); ++ bcm63138_leds_update_bits(leds, BCM63138_HW_LED_EN, bit, 0); ++ bcm63138_leds_set_flash_rate(leds, led, 0); ++ bcm63138_leds_enable_led(leds, led, led->cdev.brightness); ++ ++ return; ++ ++err_free: ++ devm_kfree(dev, led); ++} ++ ++static int bcm63138_leds_probe(struct platform_device *pdev) ++{ ++ struct device_node *np = dev_of_node(&pdev->dev); ++ struct device *dev = &pdev->dev; ++ struct bcm63138_leds *leds; ++ struct device_node *child; ++ ++ leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL); ++ if (!leds) ++ return -ENOMEM; ++ ++ leds->dev = dev; ++ ++ leds->base = devm_platform_ioremap_resource(pdev, 0); ++ if (IS_ERR(leds->base)) ++ return PTR_ERR(leds->base); ++ ++ spin_lock_init(&leds->lock); ++ ++ bcm63138_leds_write(leds, BCM63138_GLB_CTRL, ++ BCM63138_GLB_CTRL_SERIAL_LED_DATA_PPOL | ++ BCM63138_GLB_CTRL_SERIAL_LED_EN_POL); ++ bcm63138_leds_write(leds, BCM63138_HW_LED_EN, 0); ++ bcm63138_leds_write(leds, BCM63138_SERIAL_LED_POLARITY, 0); ++ bcm63138_leds_write(leds, BCM63138_PARALLEL_LED_POLARITY, 0); ++ ++ for_each_available_child_of_node(np, child) { ++ bcm63138_leds_create_led(leds, child); ++ } ++ ++ return 0; ++} ++ ++static const struct of_device_id bcm63138_leds_of_match_table[] = { ++ { .compatible = "brcm,bcm63138-leds", }, ++ { }, ++}; ++ ++static struct platform_driver bcm63138_leds_driver = { ++ .probe = bcm63138_leds_probe, ++ .driver = { ++ .name = "leds-bcm63xxx", ++ .of_match_table = bcm63138_leds_of_match_table, ++ }, ++}; ++ ++module_platform_driver(bcm63138_leds_driver); ++ ++MODULE_AUTHOR("Rafał Miłecki"); ++MODULE_LICENSE("GPL"); ++MODULE_DEVICE_TABLE(of, bcm63138_leds_of_match_table);