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sysreset: tegra: create arch specific sysreset driver

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Tegra uses built in Power Management Controller (PMC) to perform
CPU reset. Code to perform this was located in mach-tegra, so lest
create DM driver to handle this.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
This commit is contained in:
Svyatoslav Ryhel 2023-10-24 10:49:03 +03:00 committed by Tom Rini
parent c23fca8958
commit 7084f34d0f
3 changed files with 52 additions and 0 deletions
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6
drivers/sysreset/Kconfig
View file

@ -137,6 +137,12 @@ config SYSRESET_SOCFPGA_SOC64
This enables the system reset driver support for Intel SOCFPGA
SoC64 SoCs.
config SYSRESET_TEGRA
bool "Tegra PMC system reset driver"
depends on ARCH_TEGRA
help
This enables the system reset ability of PMC used in Tegra SoCs.
config SYSRESET_TI_SCI
bool "TI System Control Interface (TI SCI) system reset driver"
depends on TI_SCI_PROTOCOL

1
drivers/sysreset/Makefile
View file

@ -16,6 +16,7 @@ obj-$(CONFIG_SYSRESET_PSCI) += sysreset_psci.o
obj-$(CONFIG_SYSRESET_SBI) += sysreset_sbi.o
obj-$(CONFIG_SYSRESET_SOCFPGA) += sysreset_socfpga.o
obj-$(CONFIG_SYSRESET_SOCFPGA_SOC64) += sysreset_socfpga_soc64.o
obj-$(CONFIG_SYSRESET_TEGRA) += sysreset_tegra.o
obj-$(CONFIG_SYSRESET_TI_SCI) += sysreset-ti-sci.o
obj-$(CONFIG_SYSRESET_SYSCON) += sysreset_syscon.o
obj-$(CONFIG_SYSRESET_WATCHDOG) += sysreset_watchdog.o

45
drivers/sysreset/sysreset_tegra.c Normal file
View file

@ -0,0 +1,45 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright(C) 2023 Svyatoslav Ryhel <clamor95@gmail.com>
*/
#include <dm.h>
#include <errno.h>
#include <sysreset.h>
#include <linux/err.h>
#include <asm/arch-tegra/pmc.h>
static int tegra_sysreset_request(struct udevice *dev,
enum sysreset_t type)
{
u32 value;
switch (type) {
case SYSRESET_WARM:
case SYSRESET_COLD:
/* resets everything but scratch 0 and reset status */
value = tegra_pmc_readl(PMC_CNTRL);
value |= PMC_CNTRL_MAIN_RST;
tegra_pmc_writel(value, PMC_CNTRL);
break;
default:
return -EPROTONOSUPPORT;
}
return -EINPROGRESS;
}
static struct sysreset_ops tegra_sysreset = {
.request = tegra_sysreset_request,
};
U_BOOT_DRIVER(sysreset_tegra) = {
.id = UCLASS_SYSRESET,
.name = "sysreset_tegra",
.ops = &tegra_sysreset,
};
/* Link to Tegra PMC once there is a driver */
U_BOOT_DRVINFO(sysreset_tegra) = {
.name = "sysreset_tegra"
};