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[83.38.123.230]) by smtp.gmail.com with ESMTPSA id q16sm6078235wmg.2.2017.05.12.16.17.40 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 12 May 2017 16:17:41 -0700 (PDT) From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= To: u-boot@lists.denx.de, daniel.schwierzeck@gmail.com, sjg@chromium.org Date: Sat, 13 May 2017 01:19:43 +0200 Message-Id: <1494631186-28533-6-git-send-email-noltari@gmail.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1494631186-28533-1-git-send-email-noltari@gmail.com> References: <1494631186-28533-1-git-send-email-noltari@gmail.com> MIME-Version: 1.0 Subject: [U-Boot] [PATCH 5/8] dm: sysreset: add watchdog-reboot driver 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: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" Add a new sysreset driver that uses the recently added watchdog support. It performs a full SoC reset by calling wdt_expire_now op. Signed-off-by: Álvaro Fernández Rojas Reviewed-by: Simon Glass --- drivers/sysreset/Kconfig | 6 ++++ drivers/sysreset/Makefile | 1 + drivers/sysreset/sysreset_watchdog.c | 57 ++++++++++++++++++++++++++++++++++++ 3 files changed, 64 insertions(+) create mode 100644 drivers/sysreset/sysreset_watchdog.c diff --git a/drivers/sysreset/Kconfig b/drivers/sysreset/Kconfig index b2f7464..a6d48e8 100644 --- a/drivers/sysreset/Kconfig +++ b/drivers/sysreset/Kconfig @@ -31,4 +31,10 @@ config SYSRESET_SYSCON help Reboot support for generic SYSCON mapped register reset. +config SYSRESET_WATCHDOG + bool "Enable support for watchdog reboot driver" + select WDT + help + Reboot support for generic watchdog reset. + endmenu diff --git a/drivers/sysreset/Makefile b/drivers/sysreset/Makefile index bd352e7..b683811 100644 --- a/drivers/sysreset/Makefile +++ b/drivers/sysreset/Makefile @@ -7,6 +7,7 @@ obj-$(CONFIG_SYSRESET) += sysreset-uclass.o obj-$(CONFIG_SYSRESET_PSCI) += sysreset_psci.o obj-$(CONFIG_SYSRESET_SYSCON) += sysreset_syscon.o +obj-$(CONFIG_SYSRESET_WATCHDOG) += sysreset_watchdog.o ifndef CONFIG_SPL_BUILD obj-$(CONFIG_ROCKCHIP_RK3036) += sysreset_rk3036.o diff --git a/drivers/sysreset/sysreset_watchdog.c b/drivers/sysreset/sysreset_watchdog.c new file mode 100644 index 0000000..caeb039 --- /dev/null +++ b/drivers/sysreset/sysreset_watchdog.c @@ -0,0 +1,57 @@ +/* + * Copyright (C) 2017 Álvaro Fernández Rojas + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include +#include + +struct wdt_reboot_priv { + struct udevice *wdt; +}; + +static int wdt_reboot_request(struct udevice *dev, enum sysreset_t type) +{ + struct wdt_reboot_priv *priv = dev_get_priv(dev); + + wdt_expire_now(priv->wdt, 0); + + return -EINPROGRESS; +} + +static struct sysreset_ops wdt_reboot_ops = { + .request = wdt_reboot_request, +}; + +int wdt_reboot_probe(struct udevice *dev) +{ + struct wdt_reboot_priv *priv = dev_get_priv(dev); + int err; + + err = uclass_get_device_by_phandle(UCLASS_WDT, dev, + "wdt", &priv->wdt); + if (err) { + error("unable to find wdt device\n"); + return err; + } + + return 0; +} + +static const struct udevice_id wdt_reboot_ids[] = { + { .compatible = "wdt-reboot" }, + { /* sentinel */ } +}; + +U_BOOT_DRIVER(wdt_reboot) = { + .name = "wdt_reboot", + .id = UCLASS_SYSRESET, + .of_match = wdt_reboot_ids, + .ops = &wdt_reboot_ops, + .priv_auto_alloc_size = sizeof(struct wdt_reboot_priv), + .probe = wdt_reboot_probe, +};