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u-boot/drivers/reset/reset-ast2500.c

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SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-06 21:58:06 +00:00
// SPDX-License-Identifier: GPL-2.0
aspeed: Reset Driver Add Reset Driver for ast2500 SoC. This driver uses Watchdog Timer to perform resets and thus depends on it. The actual Watchdog device used needs to be configured in Device Tree using "aspeed,wdt" property, which must be WDT phandle, for example: rst: reset-controller { compatible = "aspeed,ast2500-reset"; aspeed,wdt = <&wdt1>; } Signed-off-by: Maxim Sloyko <maxims@google.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-04-17 19:00:24 +00:00
/*
* Copyright 2017 Google, Inc
reset: ast2500: Use SCU for reset control The System Control Unit (SCU) controller of Aspeed SoCs provides the reset control for each peripheral. This patch refactors the reset method to leverage the SCU reset control. Thus the driver dependency on watchdog including dedicated WDT API and reset flag encoding can be eliminated. The Kconfig description is also updated accordingly. Signed-off-by: Chia-Wei, Wang <chiawei_wang@aspeedtech.com> Reviewed-by: Ryan Chen <ryan_chen@aspeedtech.com>
2020-10-15 02:25:13 +00:00
* Copyright 2020 ASPEED Technology Inc.
aspeed: Reset Driver Add Reset Driver for ast2500 SoC. This driver uses Watchdog Timer to perform resets and thus depends on it. The actual Watchdog device used needs to be configured in Device Tree using "aspeed,wdt" property, which must be WDT phandle, for example: rst: reset-controller { compatible = "aspeed,ast2500-reset"; aspeed,wdt = <&wdt1>; } Signed-off-by: Maxim Sloyko <maxims@google.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-04-17 19:00:24 +00:00
*/
#include <common.h>
#include <dm.h>
common: Drop log.h from common header Move this header out of the common header. Signed-off-by: Simon Glass <sjg@chromium.org>
2020-05-10 17:40:05 +00:00
#include <log.h>
aspeed: Reset Driver Add Reset Driver for ast2500 SoC. This driver uses Watchdog Timer to perform resets and thus depends on it. The actual Watchdog device used needs to be configured in Device Tree using "aspeed,wdt" property, which must be WDT phandle, for example: rst: reset-controller { compatible = "aspeed,ast2500-reset"; aspeed,wdt = <&wdt1>; } Signed-off-by: Maxim Sloyko <maxims@google.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-04-17 19:00:24 +00:00
#include <misc.h>
#include <reset.h>
#include <reset-uclass.h>
reset: ast2500: Use SCU for reset control The System Control Unit (SCU) controller of Aspeed SoCs provides the reset control for each peripheral. This patch refactors the reset method to leverage the SCU reset control. Thus the driver dependency on watchdog including dedicated WDT API and reset flag encoding can be eliminated. The Kconfig description is also updated accordingly. Signed-off-by: Chia-Wei, Wang <chiawei_wang@aspeedtech.com> Reviewed-by: Ryan Chen <ryan_chen@aspeedtech.com>
2020-10-15 02:25:13 +00:00
#include <linux/err.h>
aspeed: Reset Driver Add Reset Driver for ast2500 SoC. This driver uses Watchdog Timer to perform resets and thus depends on it. The actual Watchdog device used needs to be configured in Device Tree using "aspeed,wdt" property, which must be WDT phandle, for example: rst: reset-controller { compatible = "aspeed,ast2500-reset"; aspeed,wdt = <&wdt1>; } Signed-off-by: Maxim Sloyko <maxims@google.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-04-17 19:00:24 +00:00
#include <asm/io.h>
#include <asm/arch/scu_ast2500.h>
struct ast2500_reset_priv {
struct ast2500_scu *scu;
};
reset: ast2500: Use SCU for reset control The System Control Unit (SCU) controller of Aspeed SoCs provides the reset control for each peripheral. This patch refactors the reset method to leverage the SCU reset control. Thus the driver dependency on watchdog including dedicated WDT API and reset flag encoding can be eliminated. The Kconfig description is also updated accordingly. Signed-off-by: Chia-Wei, Wang <chiawei_wang@aspeedtech.com> Reviewed-by: Ryan Chen <ryan_chen@aspeedtech.com>
2020-10-15 02:25:13 +00:00
static int ast2500_reset_request(struct reset_ctl *reset_ctl)
aspeed: Reset Driver Add Reset Driver for ast2500 SoC. This driver uses Watchdog Timer to perform resets and thus depends on it. The actual Watchdog device used needs to be configured in Device Tree using "aspeed,wdt" property, which must be WDT phandle, for example: rst: reset-controller { compatible = "aspeed,ast2500-reset"; aspeed,wdt = <&wdt1>; } Signed-off-by: Maxim Sloyko <maxims@google.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-04-17 19:00:24 +00:00
{
reset: ast2500: Use SCU for reset control The System Control Unit (SCU) controller of Aspeed SoCs provides the reset control for each peripheral. This patch refactors the reset method to leverage the SCU reset control. Thus the driver dependency on watchdog including dedicated WDT API and reset flag encoding can be eliminated. The Kconfig description is also updated accordingly. Signed-off-by: Chia-Wei, Wang <chiawei_wang@aspeedtech.com> Reviewed-by: Ryan Chen <ryan_chen@aspeedtech.com>
2020-10-15 02:25:13 +00:00
debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
reset_ctl->dev, reset_ctl->id);
aspeed: Reset Driver Add Reset Driver for ast2500 SoC. This driver uses Watchdog Timer to perform resets and thus depends on it. The actual Watchdog device used needs to be configured in Device Tree using "aspeed,wdt" property, which must be WDT phandle, for example: rst: reset-controller { compatible = "aspeed,ast2500-reset"; aspeed,wdt = <&wdt1>; } Signed-off-by: Maxim Sloyko <maxims@google.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-04-17 19:00:24 +00:00
reset: ast2500: Use SCU for reset control The System Control Unit (SCU) controller of Aspeed SoCs provides the reset control for each peripheral. This patch refactors the reset method to leverage the SCU reset control. Thus the driver dependency on watchdog including dedicated WDT API and reset flag encoding can be eliminated. The Kconfig description is also updated accordingly. Signed-off-by: Chia-Wei, Wang <chiawei_wang@aspeedtech.com> Reviewed-by: Ryan Chen <ryan_chen@aspeedtech.com>
2020-10-15 02:25:13 +00:00
return 0;
}
static int ast2500_reset_free(struct reset_ctl *reset_ctl)
{
debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
reset_ctl->dev, reset_ctl->id);
aspeed: Reset Driver Add Reset Driver for ast2500 SoC. This driver uses Watchdog Timer to perform resets and thus depends on it. The actual Watchdog device used needs to be configured in Device Tree using "aspeed,wdt" property, which must be WDT phandle, for example: rst: reset-controller { compatible = "aspeed,ast2500-reset"; aspeed,wdt = <&wdt1>; } Signed-off-by: Maxim Sloyko <maxims@google.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-04-17 19:00:24 +00:00
return 0;
}
static int ast2500_reset_assert(struct reset_ctl *reset_ctl)
{
struct ast2500_reset_priv *priv = dev_get_priv(reset_ctl->dev);
reset: ast2500: Use SCU for reset control The System Control Unit (SCU) controller of Aspeed SoCs provides the reset control for each peripheral. This patch refactors the reset method to leverage the SCU reset control. Thus the driver dependency on watchdog including dedicated WDT API and reset flag encoding can be eliminated. The Kconfig description is also updated accordingly. Signed-off-by: Chia-Wei, Wang <chiawei_wang@aspeedtech.com> Reviewed-by: Ryan Chen <ryan_chen@aspeedtech.com>
2020-10-15 02:25:13 +00:00
struct ast2500_scu *scu = priv->scu;
debug("%s: reset_ctl->id: %lu\n", __func__, reset_ctl->id);
aspeed: Reset Driver Add Reset Driver for ast2500 SoC. This driver uses Watchdog Timer to perform resets and thus depends on it. The actual Watchdog device used needs to be configured in Device Tree using "aspeed,wdt" property, which must be WDT phandle, for example: rst: reset-controller { compatible = "aspeed,ast2500-reset"; aspeed,wdt = <&wdt1>; } Signed-off-by: Maxim Sloyko <maxims@google.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-04-17 19:00:24 +00:00
reset: ast2500: Use SCU for reset control The System Control Unit (SCU) controller of Aspeed SoCs provides the reset control for each peripheral. This patch refactors the reset method to leverage the SCU reset control. Thus the driver dependency on watchdog including dedicated WDT API and reset flag encoding can be eliminated. The Kconfig description is also updated accordingly. Signed-off-by: Chia-Wei, Wang <chiawei_wang@aspeedtech.com> Reviewed-by: Ryan Chen <ryan_chen@aspeedtech.com>
2020-10-15 02:25:13 +00:00
if (reset_ctl->id < 32)
setbits_le32(&scu->sysreset_ctrl1, BIT(reset_ctl->id));
else
setbits_le32(&scu->sysreset_ctrl2, BIT(reset_ctl->id - 32));
return 0;
aspeed: Reset Driver Add Reset Driver for ast2500 SoC. This driver uses Watchdog Timer to perform resets and thus depends on it. The actual Watchdog device used needs to be configured in Device Tree using "aspeed,wdt" property, which must be WDT phandle, for example: rst: reset-controller { compatible = "aspeed,ast2500-reset"; aspeed,wdt = <&wdt1>; } Signed-off-by: Maxim Sloyko <maxims@google.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-04-17 19:00:24 +00:00
}
reset: ast2500: Use SCU for reset control The System Control Unit (SCU) controller of Aspeed SoCs provides the reset control for each peripheral. This patch refactors the reset method to leverage the SCU reset control. Thus the driver dependency on watchdog including dedicated WDT API and reset flag encoding can be eliminated. The Kconfig description is also updated accordingly. Signed-off-by: Chia-Wei, Wang <chiawei_wang@aspeedtech.com> Reviewed-by: Ryan Chen <ryan_chen@aspeedtech.com>
2020-10-15 02:25:13 +00:00
static int ast2500_reset_deassert(struct reset_ctl *reset_ctl)
aspeed: Reset Driver Add Reset Driver for ast2500 SoC. This driver uses Watchdog Timer to perform resets and thus depends on it. The actual Watchdog device used needs to be configured in Device Tree using "aspeed,wdt" property, which must be WDT phandle, for example: rst: reset-controller { compatible = "aspeed,ast2500-reset"; aspeed,wdt = <&wdt1>; } Signed-off-by: Maxim Sloyko <maxims@google.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-04-17 19:00:24 +00:00
{
reset: ast2500: Use SCU for reset control The System Control Unit (SCU) controller of Aspeed SoCs provides the reset control for each peripheral. This patch refactors the reset method to leverage the SCU reset control. Thus the driver dependency on watchdog including dedicated WDT API and reset flag encoding can be eliminated. The Kconfig description is also updated accordingly. Signed-off-by: Chia-Wei, Wang <chiawei_wang@aspeedtech.com> Reviewed-by: Ryan Chen <ryan_chen@aspeedtech.com>
2020-10-15 02:25:13 +00:00
struct ast2500_reset_priv *priv = dev_get_priv(reset_ctl->dev);
struct ast2500_scu *scu = priv->scu;
debug("%s: reset_ctl->id: %lu\n", __func__, reset_ctl->id);
if (reset_ctl->id < 32)
clrbits_le32(&scu->sysreset_ctrl1, BIT(reset_ctl->id));
else
clrbits_le32(&scu->sysreset_ctrl2, BIT(reset_ctl->id - 32));
aspeed: Reset Driver Add Reset Driver for ast2500 SoC. This driver uses Watchdog Timer to perform resets and thus depends on it. The actual Watchdog device used needs to be configured in Device Tree using "aspeed,wdt" property, which must be WDT phandle, for example: rst: reset-controller { compatible = "aspeed,ast2500-reset"; aspeed,wdt = <&wdt1>; } Signed-off-by: Maxim Sloyko <maxims@google.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-04-17 19:00:24 +00:00
return 0;
}
static int ast2500_reset_probe(struct udevice *dev)
{
reset: ast2500: Use SCU for reset control The System Control Unit (SCU) controller of Aspeed SoCs provides the reset control for each peripheral. This patch refactors the reset method to leverage the SCU reset control. Thus the driver dependency on watchdog including dedicated WDT API and reset flag encoding can be eliminated. The Kconfig description is also updated accordingly. Signed-off-by: Chia-Wei, Wang <chiawei_wang@aspeedtech.com> Reviewed-by: Ryan Chen <ryan_chen@aspeedtech.com>
2020-10-15 02:25:13 +00:00
int rc;
aspeed: Reset Driver Add Reset Driver for ast2500 SoC. This driver uses Watchdog Timer to perform resets and thus depends on it. The actual Watchdog device used needs to be configured in Device Tree using "aspeed,wdt" property, which must be WDT phandle, for example: rst: reset-controller { compatible = "aspeed,ast2500-reset"; aspeed,wdt = <&wdt1>; } Signed-off-by: Maxim Sloyko <maxims@google.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-04-17 19:00:24 +00:00
struct ast2500_reset_priv *priv = dev_get_priv(dev);
reset: ast2500: Use SCU for reset control The System Control Unit (SCU) controller of Aspeed SoCs provides the reset control for each peripheral. This patch refactors the reset method to leverage the SCU reset control. Thus the driver dependency on watchdog including dedicated WDT API and reset flag encoding can be eliminated. The Kconfig description is also updated accordingly. Signed-off-by: Chia-Wei, Wang <chiawei_wang@aspeedtech.com> Reviewed-by: Ryan Chen <ryan_chen@aspeedtech.com>
2020-10-15 02:25:13 +00:00
struct udevice *scu_dev;
/* get SCU base from clock device */
rc = uclass_get_device_by_driver(UCLASS_CLK,
DM_GET_DRIVER(aspeed_ast2500_scu), &scu_dev);
if (rc) {
debug("%s: clock device not found, rc=%d\n", __func__, rc);
return rc;
}
aspeed: Reset Driver Add Reset Driver for ast2500 SoC. This driver uses Watchdog Timer to perform resets and thus depends on it. The actual Watchdog device used needs to be configured in Device Tree using "aspeed,wdt" property, which must be WDT phandle, for example: rst: reset-controller { compatible = "aspeed,ast2500-reset"; aspeed,wdt = <&wdt1>; } Signed-off-by: Maxim Sloyko <maxims@google.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-04-17 19:00:24 +00:00
reset: ast2500: Use SCU for reset control The System Control Unit (SCU) controller of Aspeed SoCs provides the reset control for each peripheral. This patch refactors the reset method to leverage the SCU reset control. Thus the driver dependency on watchdog including dedicated WDT API and reset flag encoding can be eliminated. The Kconfig description is also updated accordingly. Signed-off-by: Chia-Wei, Wang <chiawei_wang@aspeedtech.com> Reviewed-by: Ryan Chen <ryan_chen@aspeedtech.com>
2020-10-15 02:25:13 +00:00
priv->scu = devfdt_get_addr_ptr(scu_dev);
if (IS_ERR_OR_NULL(priv->scu)) {
debug("%s: invalid SCU base pointer\n", __func__);
return PTR_ERR(priv->scu);
}
aspeed: Reset Driver Add Reset Driver for ast2500 SoC. This driver uses Watchdog Timer to perform resets and thus depends on it. The actual Watchdog device used needs to be configured in Device Tree using "aspeed,wdt" property, which must be WDT phandle, for example: rst: reset-controller { compatible = "aspeed,ast2500-reset"; aspeed,wdt = <&wdt1>; } Signed-off-by: Maxim Sloyko <maxims@google.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-04-17 19:00:24 +00:00
return 0;
}
static const struct udevice_id ast2500_reset_ids[] = {
{ .compatible = "aspeed,ast2500-reset" },
{ }
};
struct reset_ops ast2500_reset_ops = {
.request = ast2500_reset_request,
reset: ast2500: Use SCU for reset control The System Control Unit (SCU) controller of Aspeed SoCs provides the reset control for each peripheral. This patch refactors the reset method to leverage the SCU reset control. Thus the driver dependency on watchdog including dedicated WDT API and reset flag encoding can be eliminated. The Kconfig description is also updated accordingly. Signed-off-by: Chia-Wei, Wang <chiawei_wang@aspeedtech.com> Reviewed-by: Ryan Chen <ryan_chen@aspeedtech.com>
2020-10-15 02:25:13 +00:00
.rfree = ast2500_reset_free,
.rst_assert = ast2500_reset_assert,
.rst_deassert = ast2500_reset_deassert,
aspeed: Reset Driver Add Reset Driver for ast2500 SoC. This driver uses Watchdog Timer to perform resets and thus depends on it. The actual Watchdog device used needs to be configured in Device Tree using "aspeed,wdt" property, which must be WDT phandle, for example: rst: reset-controller { compatible = "aspeed,ast2500-reset"; aspeed,wdt = <&wdt1>; } Signed-off-by: Maxim Sloyko <maxims@google.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-04-17 19:00:24 +00:00
};
U_BOOT_DRIVER(ast2500_reset) = {
reset: ast2500: Use SCU for reset control The System Control Unit (SCU) controller of Aspeed SoCs provides the reset control for each peripheral. This patch refactors the reset method to leverage the SCU reset control. Thus the driver dependency on watchdog including dedicated WDT API and reset flag encoding can be eliminated. The Kconfig description is also updated accordingly. Signed-off-by: Chia-Wei, Wang <chiawei_wang@aspeedtech.com> Reviewed-by: Ryan Chen <ryan_chen@aspeedtech.com>
2020-10-15 02:25:13 +00:00
.name = "ast2500_reset",
.id = UCLASS_RESET,
aspeed: Reset Driver Add Reset Driver for ast2500 SoC. This driver uses Watchdog Timer to perform resets and thus depends on it. The actual Watchdog device used needs to be configured in Device Tree using "aspeed,wdt" property, which must be WDT phandle, for example: rst: reset-controller { compatible = "aspeed,ast2500-reset"; aspeed,wdt = <&wdt1>; } Signed-off-by: Maxim Sloyko <maxims@google.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-04-17 19:00:24 +00:00
.of_match = ast2500_reset_ids,
.probe = ast2500_reset_probe,
.ops = &ast2500_reset_ops,
dm: treewide: Rename auto_alloc_size members to be shorter This construct is quite long-winded. In earlier days it made some sense since auto-allocation was a strange concept. But with driver model now used pretty universally, we can shorten this to 'auto'. This reduces verbosity and makes it easier to read. Coincidentally it also ensures that every declaration is on one line, thus making dtoc's job easier. Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-03 23:55:17 +00:00
.priv_auto = sizeof(struct ast2500_reset_priv),
aspeed: Reset Driver Add Reset Driver for ast2500 SoC. This driver uses Watchdog Timer to perform resets and thus depends on it. The actual Watchdog device used needs to be configured in Device Tree using "aspeed,wdt" property, which must be WDT phandle, for example: rst: reset-controller { compatible = "aspeed,ast2500-reset"; aspeed,wdt = <&wdt1>; } Signed-off-by: Maxim Sloyko <maxims@google.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2017-04-17 19:00:24 +00:00
};
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