From patchwork Fri Mar 22 16:02:01 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Philippe REYNES X-Patchwork-Id: 1061354 X-Patchwork-Delegate: trini@ti.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=lists.denx.de (client-ip=81.169.180.215; helo=lists.denx.de; envelope-from=u-boot-bounces@lists.denx.de; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=softathome.com Received: from lists.denx.de (dione.denx.de [81.169.180.215]) by ozlabs.org (Postfix) with ESMTP id 44QpMx4tBsz9sR9 for ; Sat, 23 Mar 2019 03:02:53 +1100 (AEDT) Received: by lists.denx.de (Postfix, from userid 105) id 4BD8BC22157; Fri, 22 Mar 2019 16:02:33 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lists.denx.de X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=none autolearn=unavailable autolearn_force=no version=3.4.0 Received: from lists.denx.de (localhost [IPv6:::1]) by lists.denx.de (Postfix) with ESMTP id E9E41C21E3B; Fri, 22 Mar 2019 16:02:15 +0000 (UTC) Received: by lists.denx.de (Postfix, from userid 105) id 17F66C21C6A; Fri, 22 Mar 2019 16:02:13 +0000 (UTC) Received: from vrout10.yaziba.net (vrout10-bl2.yaziba.net [185.56.204.56]) by lists.denx.de (Postfix) with ESMTPS id A0CEBC21C51 for ; Fri, 22 Mar 2019 16:02:13 +0000 (UTC) Received: from mtaout10.int.yaziba.net (mtaout10.int.yaziba.net [10.4.20.36]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by vrout10.yaziba.net (mx10.yaziba.net) with ESMTPS id 5913A52034; Fri, 22 Mar 2019 17:02:12 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by mtaout10.int.yaziba.net (Postfix) with ESMTP id 54ADF160186; Fri, 22 Mar 2019 17:02:12 +0100 (CET) Received: from mtaout10.int.yaziba.net ([127.0.0.1]) by localhost (mtaout10.int.yaziba.net [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 6ls3HmkaXGRK; Fri, 22 Mar 2019 17:02:12 +0100 (CET) Received: from sahnlpt0333.softathome.com (unknown [149.6.166.170]) by mtaout10.int.yaziba.net (Postfix) with ESMTPSA id 3D3C2160185; Fri, 22 Mar 2019 17:02:12 +0100 (CET) From: Philippe Reynes To: albert.u.boot@aribaud.net, noltari@gmail.com, daniel.schwierzeck@gmail.com Date: Fri, 22 Mar 2019 17:02:01 +0100 Message-Id: <1553270528-23011-1-git-send-email-philippe.reynes@softathome.com> X-Mailer: git-send-email 2.7.4 X-CLAMAV-SCAN: ok X-VRSPAM-SCORE: 0 X-VRSPAM-STATE: legit X-VRSPAM-CAUSE: gggruggvucftvghtrhhoucdtuddrgedutddrjedugdekiecutefuodetggdotefrucfrrhhofhhilhgvmecuggftfghnshhusghstghrihgsvgenuceurghilhhouhhtmecufedttdenucenucfjughrpefhvffufffkofestddtredtredttdenucfhrhhomheprfhhihhlihhpphgvucftvgihnhgvshcuoehphhhilhhiphhpvgdrrhgvhihnvghssehsohhfthgrthhhohhmvgdrtghomheqnecukfhppedugeelrdeirdduieeirddujedtnecurfgrrhgrmhepmhhouggvpehsmhhtphhouhht X-VRSPAM-EXTCAUSE: mhhouggvpehsmhhtphhouhht Cc: u-boot@lists.denx.de Subject: [U-Boot] [PATCH V2 1/8] led: add initial support for bcm6858 X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.18 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" The driver add the support of the led IP on bcm6858. This led IP can drive up to 32 leds, and can handle blinking. Signed-off-by: Philippe Reynes Reviewed-by: Daniel Schwierzeck --- Changelog: v2: - use const for array bcm6858_flash_rate (thanks Daniel) - use int for array bcm6858_flash_rate (thanks Daniel) doc/device-tree-bindings/leds/leds-bcm6858.txt | 51 +++++ drivers/led/Kconfig | 7 + drivers/led/Makefile | 1 + drivers/led/led_bcm6858.c | 250 +++++++++++++++++++++++++ 4 files changed, 309 insertions(+) create mode 100644 doc/device-tree-bindings/leds/leds-bcm6858.txt create mode 100644 drivers/led/led_bcm6858.c diff --git a/doc/device-tree-bindings/leds/leds-bcm6858.txt b/doc/device-tree-bindings/leds/leds-bcm6858.txt new file mode 100644 index 0000000..ea2fe23 --- /dev/null +++ b/doc/device-tree-bindings/leds/leds-bcm6858.txt @@ -0,0 +1,51 @@ +LEDs connected to Broadcom BCM6858 controller + +This controller is present on BCM6858, BCM6328, BCM6362 and BCM63268. +In these SoCs it's possible to control LEDs both as GPIOs or by hardware. + +Required properties: + - compatible : should be "brcm,bcm6858-leds". + - #address-cells : must be 1. + - #size-cells : must be 0. + - reg : BCM6858 LED controller address and size. + +Optional properties: + - brcm,serial-led-msb-first : Boolean, msb data come out first on serial data pin + Default : false + - brcm,serial-led-en-pol : Boolean, serial led polarity (true => active high) + Default : false + - brcm,serial-led-clk-pol : Boolean, serial clock polarity (true => active high) + Default : false + - brcm,serial-led-data-ppol : Boolean, serial data polarity (true => active high) + Default : false + - brcm,serial-shift-inv : Boolean, led test mode + Default : false + +Each LED is represented as a sub-node of the brcm,bcm6858-leds device. + +LED sub-node required properties: + - reg : LED pin number (only LEDs 0 to 32 are valid). + +LED sub-node optional properties: + - label : see Documentation/devicetree/bindings/leds/common.txt + - active-low : Boolean, makes LED active low. + Default : false + +Examples: +BCM6328 with 2 GPIO LEDs + leds0: led-controller@ff800800 { + compatible = "brcm,bcm6858-leds"; + #address-cells = <1>; + #size-cells = <0>; + reg = <0x0 0xff800800 0x0 0xe4>; + + led@2 { + reg = <2>; + label = "green:inet"; + }; + + led@5 { + reg = <5>; + label = "red:alarm"; + }; + }; diff --git a/drivers/led/Kconfig b/drivers/led/Kconfig index 5da5c4a..4c8582d 100644 --- a/drivers/led/Kconfig +++ b/drivers/led/Kconfig @@ -28,6 +28,13 @@ config LED_BCM6358 LED HW controller accessed via MMIO registers. HW has no blinking capabilities and up to 32 LEDs can be controlled. +config LED_BCM6858 + bool "LED Support for BCM6858" + depends on LED && ARCH_BCM6858 + help + This option enables support for LEDs connected to the BCM6858 + HW has blinking capabilities and up to 32 LEDs can be controlled. + config LED_BLINK bool "Support LED blinking" depends on LED diff --git a/drivers/led/Makefile b/drivers/led/Makefile index 160a8f3..3654dd3 100644 --- a/drivers/led/Makefile +++ b/drivers/led/Makefile @@ -6,4 +6,5 @@ obj-y += led-uclass.o obj-$(CONFIG_LED_BCM6328) += led_bcm6328.o obj-$(CONFIG_LED_BCM6358) += led_bcm6358.o +obj-$(CONFIG_LED_BCM6858) += led_bcm6858.o obj-$(CONFIG_$(SPL_)LED_GPIO) += led_gpio.o diff --git a/drivers/led/led_bcm6858.c b/drivers/led/led_bcm6858.c new file mode 100644 index 0000000..27a76fc --- /dev/null +++ b/drivers/led/led_bcm6858.c @@ -0,0 +1,250 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2019 Philippe Reynes + * + * based on: + * drivers/led/led_bcm6328.c + * drivers/led/led_bcm6358.c + */ + +#include +#include +#include +#include +#include +#include + +#define LEDS_MAX 32 +#define LEDS_WAIT 100 + +/* LED Mode register */ +#define LED_MODE_REG 0x0 +#define LED_MODE_OFF 0 +#define LED_MODE_ON 1 +#define LED_MODE_MASK 1 + +/* LED Controller Global settings register */ +#define LED_CTRL_REG 0x00 +#define LED_CTRL_MASK 0x1f +#define LED_CTRL_LED_TEST_MODE BIT(0) +#define LED_CTRL_SERIAL_LED_DATA_PPOL BIT(1) +#define LED_CTRL_SERIAL_LED_CLK_POL BIT(2) +#define LED_CTRL_SERIAL_LED_EN_POL BIT(3) +#define LED_CTRL_SERIAL_LED_MSB_FIRST BIT(4) + +/* LED Controller IP LED source select register */ +#define LED_HW_LED_EN_REG 0x08 +/* LED Flash control register0 */ +#define LED_FLASH_RATE_CONTROL_REG0 0x10 +/* Soft LED input register */ +#define LED_SW_LED_IP_REG 0xb8 +/* Soft LED input polarity register */ +#define LED_SW_LED_IP_PPOL_REG 0xbc + +struct bcm6858_led_priv { + void __iomem *regs; + u8 pin; +}; + +#ifdef CONFIG_LED_BLINK +/* + * The value for flash rate are: + * 0 : no blinking + * 1 : rate is 25 Hz => 40 ms (period) + * 2 : rate is 12.5 Hz => 80 ms (period) + * 3 : rate is 6.25 Hz => 160 ms (period) + * 4 : rate is 3.125 Hz => 320 ms (period) + * 5 : rate is 1.5625 Hz => 640 ms (period) + * 6 : rate is 0.7815 Hz => 1280 ms (period) + * 7 : rate is 0.390625 Hz => 2560 ms (period) + */ +static const int bcm6858_flash_rate[8] = { + 0, 40, 80, 160, 320, 640, 1280, 2560 +}; + +static u32 bcm6858_flash_rate_value(int period_ms) +{ + unsigned long value = 7; + int i; + + for (i = 0; i < ARRAY_SIZE(bcm6858_flash_rate); i++) { + if (period_ms <= bcm6858_flash_rate[i]) { + value = i; + break; + } + } + + return value; +} + +static int bcm6858_led_set_period(struct udevice *dev, int period_ms) +{ + struct bcm6858_led_priv *priv = dev_get_priv(dev); + u32 offset, shift, mask, value; + + offset = (priv->pin / 8) * 4; + shift = (priv->pin % 8) * 4; + mask = 0x7 << shift; + value = bcm6858_flash_rate_value(period_ms) << shift; + + clrbits_32(priv->regs + LED_FLASH_RATE_CONTROL_REG0 + offset, mask); + setbits_32(priv->regs + LED_FLASH_RATE_CONTROL_REG0 + offset, value); + + return 0; +} +#endif + +static enum led_state_t bcm6858_led_get_state(struct udevice *dev) +{ + struct bcm6858_led_priv *priv = dev_get_priv(dev); + enum led_state_t state = LEDST_OFF; + u32 sw_led_ip; + + sw_led_ip = readl(priv->regs + LED_SW_LED_IP_REG); + if (sw_led_ip & (1 << priv->pin)) + state = LEDST_ON; + + return state; +} + +static int bcm6858_led_set_state(struct udevice *dev, enum led_state_t state) +{ + struct bcm6858_led_priv *priv = dev_get_priv(dev); + + switch (state) { + case LEDST_OFF: + clrbits_32(priv->regs + LED_SW_LED_IP_REG, (1 << priv->pin)); +#ifdef CONFIG_LED_BLINK + bcm6858_led_set_period(dev, 0); +#endif + break; + case LEDST_ON: + setbits_32(priv->regs + LED_SW_LED_IP_REG, (1 << priv->pin)); +#ifdef CONFIG_LED_BLINK + bcm6858_led_set_period(dev, 0); +#endif + break; + case LEDST_TOGGLE: + if (bcm6858_led_get_state(dev) == LEDST_OFF) + return bcm6858_led_set_state(dev, LEDST_ON); + else + return bcm6858_led_set_state(dev, LEDST_OFF); + break; +#ifdef CONFIG_LED_BLINK + case LEDST_BLINK: + setbits_32(priv->regs + LED_SW_LED_IP_REG, (1 << priv->pin)); + break; +#endif + default: + return -EINVAL; + } + + return 0; +} + +static const struct led_ops bcm6858_led_ops = { + .get_state = bcm6858_led_get_state, + .set_state = bcm6858_led_set_state, +#ifdef CONFIG_LED_BLINK + .set_period = bcm6858_led_set_period, +#endif +}; + +static int bcm6858_led_probe(struct udevice *dev) +{ + struct led_uc_plat *uc_plat = dev_get_uclass_platdata(dev); + + /* Top-level LED node */ + if (!uc_plat->label) { + void __iomem *regs; + u32 set_bits = 0; + + regs = dev_remap_addr(dev); + if (!regs) + return -EINVAL; + + if (dev_read_bool(dev, "brcm,serial-led-msb-first")) + set_bits |= LED_CTRL_SERIAL_LED_MSB_FIRST; + if (dev_read_bool(dev, "brcm,serial-led-en-pol")) + set_bits |= LED_CTRL_SERIAL_LED_EN_POL; + if (dev_read_bool(dev, "brcm,serial-led-clk-pol")) + set_bits |= LED_CTRL_SERIAL_LED_CLK_POL; + if (dev_read_bool(dev, "brcm,serial-led-data-ppol")) + set_bits |= LED_CTRL_SERIAL_LED_DATA_PPOL; + if (dev_read_bool(dev, "brcm,led-test-mode")) + set_bits |= LED_CTRL_LED_TEST_MODE; + + clrsetbits_32(regs + LED_CTRL_REG, ~0, set_bits); + } else { + struct bcm6858_led_priv *priv = dev_get_priv(dev); + void __iomem *regs; + unsigned int pin; + + regs = dev_remap_addr(dev_get_parent(dev)); + if (!regs) + return -EINVAL; + + pin = dev_read_u32_default(dev, "reg", LEDS_MAX); + if (pin >= LEDS_MAX) + return -EINVAL; + + priv->regs = regs; + priv->pin = pin; + + /* this led is managed by software */ + clrbits_32(regs + LED_HW_LED_EN_REG, 1 << pin); + + /* configure the polarity */ + if (dev_read_bool(dev, "active-low")) + clrbits_32(regs + LED_SW_LED_IP_PPOL_REG, 1 << pin); + else + setbits_32(regs + LED_SW_LED_IP_PPOL_REG, 1 << pin); + } + + return 0; +} + +static int bcm6858_led_bind(struct udevice *parent) +{ + ofnode node; + + dev_for_each_subnode(node, parent) { + struct led_uc_plat *uc_plat; + struct udevice *dev; + const char *label; + int ret; + + label = ofnode_read_string(node, "label"); + if (!label) { + debug("%s: node %s has no label\n", __func__, + ofnode_get_name(node)); + return -EINVAL; + } + + ret = device_bind_driver_to_node(parent, "bcm6858-led", + ofnode_get_name(node), + node, &dev); + if (ret) + return ret; + + uc_plat = dev_get_uclass_platdata(dev); + uc_plat->label = label; + } + + return 0; +} + +static const struct udevice_id bcm6858_led_ids[] = { + { .compatible = "brcm,bcm6858-leds" }, + { /* sentinel */ } +}; + +U_BOOT_DRIVER(bcm6858_led) = { + .name = "bcm6858-led", + .id = UCLASS_LED, + .of_match = bcm6858_led_ids, + .bind = bcm6858_led_bind, + .probe = bcm6858_led_probe, + .priv_auto_alloc_size = sizeof(struct bcm6858_led_priv), + .ops = &bcm6858_led_ops, +};