在2021年11月26日十一月 上午1:52，Qing Zhang写道：
> Add power management register operations to support reboot and poweroff.
>
> Signed-off-by: Qing Zhang <zhangqing@xxxxxxxxxxx>
> ---
> v8-v9:
> No change
> ---
> drivers/platform/mips/Kconfig | 6 ++++
> drivers/platform/mips/Makefile | 1 +
> drivers/platform/mips/ls2k-reset.c | 53 ++++++++++++++++++++++++++++++
> 3 files changed, 60 insertions(+)
> create mode 100644 drivers/platform/mips/ls2k-reset.c
>
> diff --git a/drivers/platform/mips/Kconfig b/drivers/platform/mips/Kconfig
> index 8ac149173c64b..d421e14823957 100644
> --- a/drivers/platform/mips/Kconfig
> +++ b/drivers/platform/mips/Kconfig
> @@ -30,4 +30,10 @@ config RS780E_ACPI
> help
> Loongson RS780E PCH ACPI Controller driver.
>
> +config LS2K_RESET
> + bool "Loongson-2K1000 Reset Controller"
> + depends on MACH_LOONGSON64 || COMPILE_TEST
> + help
> + Loongson-2K1000 Reset Controller driver.
> +
> endif # MIPS_PLATFORM_DEVICES
> diff --git a/drivers/platform/mips/Makefile
> b/drivers/platform/mips/Makefile
> index 1781490987773..4c71444e453a6 100644
> --- a/drivers/platform/mips/Makefile
> +++ b/drivers/platform/mips/Makefile
> @@ -1,3 +1,4 @@
> # SPDX-License-Identifier: GPL-2.0-only
> obj-$(CONFIG_CPU_HWMON) += cpu_hwmon.o
> obj-$(CONFIG_RS780E_ACPI) += rs780e-acpi.o
> +obj-$(CONFIG_LS2K_RESET) += ls2k-reset.o
> diff --git a/drivers/platform/mips/ls2k-reset.c
> b/drivers/platform/mips/ls2k-reset.c
> new file mode 100644
> index 0000000000000..b70e7b8a092c2
> --- /dev/null
> +++ b/drivers/platform/mips/ls2k-reset.c
> @@ -0,0 +1,53 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2021, Qing Zhang <zhangqing@xxxxxxxxxxx>
> + * Loongson-2K1000 reset support
> + */
> +
> +#include <linux/of_address.h>
> +#include <linux/pm.h>
> +#include <asm/reboot.h>
> +
> +#define PM1_STS 0x0c /* Power Management 1 Status Register */
> +#define PM1_CNT 0x14 /* Power Management 1 Control Register */
> +#define RST_CNT 0x30 /* Reset Control Register */
> +
> +static void __iomem *base;
> +
> +static void ls2k_restart(char *command)
> +{
> + writel(0x1, base + RST_CNT);
> +}
> +
> +static void ls2k_poweroff(void)
> +{
> + /* Clear */
> + writel((readl(base + PM1_STS) & 0xffffffff), base + PM1_STS);
> + /* Sleep Enable | Soft Off*/
> + writel(GENMASK(12, 10) | BIT(13), base + PM1_CNT);
> +}
> +
> +static int ls2k_reset_init(void)
> +{
> + struct device_node *np;
> +
> + np = of_find_compatible_node(NULL, NULL, "loongson,ls2k-pm");
> + if (!np) {
> + pr_info("Failed to get PM node\n");
> + return -ENODEV;
Hi Qing,
Could you please remove this print.
Otherwise we will have this suspecious log all loongson64 system, not only ls2k.
Thanks.
- Jiaxun
> + }
> +
> + base = of_iomap(np, 0);
> + if (!base) {
> + pr_info("Failed to map PM register base address\n");
> + return -ENOMEM;
> + }
> +
> + _machine_restart = ls2k_restart;
> + pm_power_off = ls2k_poweroff;
> +
> + of_node_put(np);
> + return 0;
> +}
> +
> +arch_initcall(ls2k_reset_init);
> --
> 2.31.0
--
- Jiaxun
