This includes BCM63xx and BCM4908 families.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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
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
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
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
--- /dev/null
+From 13344f8ce8a0d98aa7f5d69ce3b47393c73a343b Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+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 <rafal@milecki.pl>
+Reviewed-by: Rob Herring <robh@kernel.org>
+Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
+Signed-off-by: Pavel Machek <pavel@ucw.cz>
+---
+ .../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 <rafal@milecki.pl>
++
++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 <dt-bindings/leds/common.h>
++
++ 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 = <LED_COLOR_ID_GREEN>;
++ default-state = "on";
++ };
++
++ led@3 {
++ reg = <0x3>;
++ function = LED_FUNCTION_STATUS;
++ color = <LED_COLOR_ID_GREEN>;
++ active-low;
++ };
++ };
--- /dev/null
+From a0ba692072d89075d0a75c7ad9df31f2c1ee9a1c Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+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 <rafal@milecki.pl>
+Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
+Signed-off-by: Pavel Machek <pavel@ucw.cz>
+---
+ 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 <rafal@milecki.pl>
++ */
++#include <linux/delay.h>
++#include <linux/io.h>
++#include <linux/leds.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/pinctrl/consumer.h>
++#include <linux/platform_device.h>
++#include <linux/spinlock.h>
++
++#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/
--- /dev/null
+From 13344f8ce8a0d98aa7f5d69ce3b47393c73a343b Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+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 <rafal@milecki.pl>
+Reviewed-by: Rob Herring <robh@kernel.org>
+Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
+Signed-off-by: Pavel Machek <pavel@ucw.cz>
+---
+ .../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 <rafal@milecki.pl>
++
++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 <dt-bindings/leds/common.h>
++
++ 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 = <LED_COLOR_ID_GREEN>;
++ default-state = "on";
++ };
++
++ led@3 {
++ reg = <0x3>;
++ function = LED_FUNCTION_STATUS;
++ color = <LED_COLOR_ID_GREEN>;
++ active-low;
++ };
++ };
--- /dev/null
+From a0ba692072d89075d0a75c7ad9df31f2c1ee9a1c Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+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 <rafal@milecki.pl>
+Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
+Signed-off-by: Pavel Machek <pavel@ucw.cz>
+---
+ 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 <rafal@milecki.pl>
++ */
++#include <linux/delay.h>
++#include <linux/io.h>
++#include <linux/leds.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/pinctrl/consumer.h>
++#include <linux/platform_device.h>
++#include <linux/spinlock.h>
++
++#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);
projects / openwrt / staging / stintel.git / commitdiff