diff options
Diffstat (limited to 'drivers/reset/reset-simple.c')
| -rw-r--r-- | drivers/reset/reset-simple.c | 45 |
1 files changed, 35 insertions, 10 deletions
diff --git a/drivers/reset/reset-simple.c b/drivers/reset/reset-simple.c index 77fbba3100c8..79e94ecfe4f5 100644 --- a/drivers/reset/reset-simple.c +++ b/drivers/reset/reset-simple.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Simple Reset Controller Driver * @@ -8,24 +9,18 @@ * Copyright 2013 Maxime Ripard * * Maxime Ripard <maxime.ripard@free-electrons.com> - * - * 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; either version 2 of the License, or - * (at your option) any later version. */ +#include <linux/delay.h> #include <linux/device.h> #include <linux/err.h> #include <linux/io.h> #include <linux/of.h> -#include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/reset-controller.h> +#include <linux/reset/reset-simple.h> #include <linux/spinlock.h> -#include "reset-simple.h" - static inline struct reset_simple_data * to_reset_simple_data(struct reset_controller_dev *rcdev) { @@ -68,6 +63,24 @@ static int reset_simple_deassert(struct reset_controller_dev *rcdev, return reset_simple_update(rcdev, id, false); } +static int reset_simple_reset(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct reset_simple_data *data = to_reset_simple_data(rcdev); + int ret; + + if (!data->reset_us) + return -ENOTSUPP; + + ret = reset_simple_assert(rcdev, id); + if (ret) + return ret; + + usleep_range(data->reset_us, data->reset_us * 2); + + return reset_simple_deassert(rcdev, id); +} + static int reset_simple_status(struct reset_controller_dev *rcdev, unsigned long id) { @@ -85,6 +98,7 @@ static int reset_simple_status(struct reset_controller_dev *rcdev, const struct reset_control_ops reset_simple_ops = { .assert = reset_simple_assert, .deassert = reset_simple_deassert, + .reset = reset_simple_reset, .status = reset_simple_status, }; EXPORT_SYMBOL_GPL(reset_simple_ops); @@ -129,6 +143,18 @@ static const struct of_device_id reset_simple_dt_ids[] = { .data = &reset_simple_active_low }, { .compatible = "aspeed,ast2400-lpc-reset" }, { .compatible = "aspeed,ast2500-lpc-reset" }, + { .compatible = "aspeed,ast2600-lpc-reset" }, + { .compatible = "bitmain,bm1880-reset", + .data = &reset_simple_active_low }, + { .compatible = "brcm,bcm4908-misc-pcie-reset", + .data = &reset_simple_active_low }, + { .compatible = "snps,dw-high-reset" }, + { .compatible = "snps,dw-low-reset", + .data = &reset_simple_active_low }, + { .compatible = "sophgo,cv1800b-reset", + .data = &reset_simple_active_low }, + { .compatible = "sophgo,sg2042-reset", + .data = &reset_simple_active_low }, { /* sentinel */ }, }; @@ -147,8 +173,7 @@ static int reset_simple_probe(struct platform_device *pdev) if (!data) return -ENOMEM; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - membase = devm_ioremap_resource(dev, res); + membase = devm_platform_get_and_ioremap_resource(pdev, 0, &res); if (IS_ERR(membase)) return PTR_ERR(membase); |