diff options
Diffstat (limited to 'pkgs/patches-linux-5.15/800-v5.20-0002-leds-bcm63138-add-support-for-BCM63138-controller.patch')
| -rw-r--r-- | pkgs/patches-linux-5.15/800-v5.20-0002-leds-bcm63138-add-support-for-BCM63138-controller.patch | 356 |
1 files changed, 356 insertions, 0 deletions
diff --git a/pkgs/patches-linux-5.15/800-v5.20-0002-leds-bcm63138-add-support-for-BCM63138-controller.patch b/pkgs/patches-linux-5.15/800-v5.20-0002-leds-bcm63138-add-support-for-BCM63138-controller.patch new file mode 100644 index 0000000..3765845 --- /dev/null +++ b/pkgs/patches-linux-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?= <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); |