Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754224AbbBRSUi (ORCPT ); Wed, 18 Feb 2015 13:20:38 -0500 Received: from mail-pa0-f47.google.com ([209.85.220.47]:39639 "EHLO mail-pa0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753483AbbBRST2 (ORCPT ); Wed, 18 Feb 2015 13:19:28 -0500 From: Moritz Fischer To: sre@kernel.org Cc: dbaryshkov@gmail.com, dwmw2@infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Moritz Fischer Subject: [PATCH v1 1/3] power: reset: Add support for NI Ettus Research USRP E3x0 soft-poweroff. Date: Wed, 18 Feb 2015 10:18:14 -0800 Message-Id: <1424283496-4479-2-git-send-email-moritz.fischer@ettus.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1424283496-4479-1-git-send-email-moritz.fischer@ettus.com> References: <1424283496-4479-1-git-send-email-moritz.fischer@ettus.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4240 Lines: 133 Signed-off-by: Moritz Fischer --- drivers/power/reset/Kconfig | 10 +++++ drivers/power/reset/Makefile | 1 + drivers/power/reset/e3x0-poweroff.c | 79 +++++++++++++++++++++++++++++++++++++ 3 files changed, 90 insertions(+) diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index 27f6646..7e81c93 100644 --- a/drivers/power/reset/Kconfig +++ b/drivers/power/reset/Kconfig @@ -48,6 +48,16 @@ config POWER_RESET_BRCMSTB Say Y here if you have a Broadcom STB board and you wish to have restart support. +config POWER_RESET_E3X0 + tristate "NI Ettus Research USRP E3x0 soft poweroff driver." + default n + help + Say Y here to enable support for the NI Ettus Research + USRP E3x0 soft poweroff. + + To compile this driver as a module, chose M here: the + module will be called e3x0-poweroff. + config POWER_RESET_GPIO bool "GPIO power-off driver" depends on OF_GPIO diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile index 11de15b..eef50e9a 100644 --- a/drivers/power/reset/Makefile +++ b/drivers/power/reset/Makefile @@ -3,6 +3,7 @@ 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_BRCMSTB) += brcmstb-reboot.o +obj-$(CONFIG_POWER_RESET_E3X0) += e3x0-poweroff.o obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o obj-$(CONFIG_POWER_RESET_GPIO_RESTART) += gpio-restart.o obj-$(CONFIG_POWER_RESET_HISI) += hisi-reboot.o diff --git a/drivers/power/reset/e3x0-poweroff.c b/drivers/power/reset/e3x0-poweroff.c new file mode 100644 index 0000000..767fa19 --- /dev/null +++ b/drivers/power/reset/e3x0-poweroff.c @@ -0,0 +1,79 @@ +/* + * Copyright (c) 2015, National Instruments Corp. All rights reserved. + * + * Driver for NI Ettus Research USRP E3x0 soft power off. + * + * 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 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +static const u32 SC_POWEROFF = 0x0; +static const u32 SC_POWEROFF_MAGIC = 0x7a; + +static struct regmap *syscon; + +static void e3x0_pm_power_off(void) +{ + regmap_write(syscon, SC_POWEROFF, SC_POWEROFF_MAGIC); +} + +static int e3x0_poweroff_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + + syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon"); + if (IS_ERR(syscon)) { + dev_err(dev, "Failed to get syscon"); + return PTR_ERR(syscon); + } + + if (!pm_power_off) + pm_power_off = e3x0_pm_power_off; + + return 0; +} + +static int e3x0_poweroff_remove(struct platform_device *pdev) +{ + if (pm_power_off == e3x0_pm_power_off) + pm_power_off = NULL; + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id e3x0_poweroff_match[] = { + { .compatible = "ettus,e3x0-poweroff", }, + { }, +}; +MODULE_DEVICE_TABLE(of, e3x0_poweroff_match); +#endif + +static struct platform_driver e3x0_poweroff_driver = { + .driver = { + .name = "e3x0-poweroff", + .of_match_table = of_match_ptr(e3x0_poweroff_match), + }, + .probe = e3x0_poweroff_probe, + .remove = e3x0_poweroff_remove, +}; +module_platform_driver(e3x0_poweroff_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Moritz Fischer "); +MODULE_DESCRIPTION("NI Ettus Research USRP E3x0 soft-poweroff driver"); +MODULE_ALIAS("platform:e3x0-poweroff"); -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/