diff options
Diffstat (limited to 'target/linux/generic/backport-5.10/845-v6.0-0002-leds-bcm63138-add-support-for-BCM63138-controller.patch')
-rw-r--r-- | target/linux/generic/backport-5.10/845-v6.0-0002-leds-bcm63138-add-support-for-BCM63138-controller.patch | 371 |
1 files changed, 0 insertions, 371 deletions
diff --git a/target/linux/generic/backport-5.10/845-v6.0-0002-leds-bcm63138-add-support-for-BCM63138-controller.patch b/target/linux/generic/backport-5.10/845-v6.0-0002-leds-bcm63138-add-support-for-BCM63138-controller.patch deleted file mode 100644 index 8ebe8f180b..0000000000 --- a/target/linux/generic/backport-5.10/845-v6.0-0002-leds-bcm63138-add-support-for-BCM63138-controller.patch +++ /dev/null @@ -1,371 +0,0 @@ -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/ |