Add a sofware reset driver for the Broadcom BCM63xx DSL SoCs, starting with 6328 all the way through newer chips such as 63138.
Signed-off-by: Florian Fainelli <f.faine...@gmail.com> --- drivers/power/reset/Kconfig | 7 ++++ drivers/power/reset/Makefile | 1 + drivers/power/reset/bcm63xx-reboot.c | 80 ++++++++++++++++++++++++++++++++++++ 3 files changed, 88 insertions(+) create mode 100644 drivers/power/reset/bcm63xx-reboot.c diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index 27f6646731b0..c20c76870f42 100644 --- a/drivers/power/reset/Kconfig +++ b/drivers/power/reset/Kconfig @@ -38,6 +38,13 @@ config POWER_RESET_AXXIA Say Y if you have an Axxia family SoC. +config POWER_RESET_BCM63XX + bool "Broadcom BCM63xx reset driver" + depends on ARM || MIPS || COMPILE_TEST + default ARCH_BCM_63XX + help + This driver provides restart support for the Broadcom DSL SoCs. + config POWER_RESET_BRCMSTB bool "Broadcom STB reset driver" depends on ARM || MIPS || COMPILE_TEST diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile index 11de15bae52e..7d28eaff4cd1 100644 --- a/drivers/power/reset/Makefile +++ b/drivers/power/reset/Makefile @@ -2,6 +2,7 @@ obj-$(CONFIG_POWER_RESET_AS3722) += as3722-poweroff.o obj-$(CONFIG_POWER_RESET_AT91_POWEROFF) += at91-poweroff.o obj-$(CONFIG_POWER_RESET_AT91_RESET) += at91-reset.o obj-$(CONFIG_POWER_RESET_AXXIA) += axxia-reset.o +obj-$(CONFIG_POWER_RESET_BCM63XX) += bcm63xx-reboot.o obj-$(CONFIG_POWER_RESET_BRCMSTB) += brcmstb-reboot.o obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o obj-$(CONFIG_POWER_RESET_GPIO_RESTART) += gpio-restart.o diff --git a/drivers/power/reset/bcm63xx-reboot.c b/drivers/power/reset/bcm63xx-reboot.c new file mode 100644 index 000000000000..1e3a93c38784 --- /dev/null +++ b/drivers/power/reset/bcm63xx-reboot.c @@ -0,0 +1,80 @@ +/* + * Broadcom BCM63xx DSL SoCs reboot handler + * + * Copyright (C) 2015, Broadcom Corporation + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/device.h> +#include <linux/io.h> +#include <linux/platform_device.h> +#include <linux/reboot.h> +#include <linux/of.h> + +static void __iomem *rst_base; + +#define SOFT_RESET BIT(0) + +static int bcm63xx_restart_handler(struct notifier_block *this, + unsigned long mdoe, void *cmd) +{ + u32 reg; + + reg = __raw_readl(rst_base); + reg |= SOFT_RESET; + __raw_writel(reg, rst_base); + + while (1) + ; + + return NOTIFY_DONE; +} + +static struct notifier_block bcm63xx_restart_nb = { + .notifier_call = bcm63xx_restart_handler, + .priority = 128, +}; + +#ifdef CONFIG_OF +static const struct of_device_id bcm63xx_reboot_of_match[] = { + { .compatible = "brcm,bcm6328-soft-reset", }, + { /* sentinel */ }, +}; +#endif + +static int bcm63xx_reboot_probe(struct platform_device *pdev) +{ + struct resource *r; + + r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + rst_base = devm_ioremap_resource(&pdev->dev, r); + if (IS_ERR(rst_base)) { + dev_err(&pdev->dev, "failed to remap registers\n"); + return PTR_ERR(rst_base); + } + + return register_restart_handler(&bcm63xx_restart_nb); +} + +static struct platform_driver bcm63xx_reboot_driver = { + .probe = bcm63xx_reboot_probe, + .driver = { + .name = "bcm63xx-soft-reset", + .of_match_table = of_match_ptr(bcm63xx_reboot_of_match), + }, +}; + +static int __init bcm63xx_reboot_init(void) +{ + return platform_driver_probe(&bcm63xx_reboot_driver, + bcm63xx_reboot_probe); +} +subsys_initcall(bcm63xx_reboot_init); -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/