From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/platform/mips/ls2k-reset.c | 53 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 drivers/platform/mips/ls2k-reset.c (limited to 'drivers/platform/mips/ls2k-reset.c') diff --git a/drivers/platform/mips/ls2k-reset.c b/drivers/platform/mips/ls2k-reset.c new file mode 100644 index 0000000000..8f42d5d164 --- /dev/null +++ b/drivers/platform/mips/ls2k-reset.c @@ -0,0 +1,53 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2021, Qing Zhang + * Loongson-2K1000 reset support + */ + +#include +#include +#include + +#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; + } + + base = of_iomap(np, 0); + of_node_put(np); + if (!base) { + pr_info("Failed to map PM register base address\n"); + return -ENOMEM; + } + + _machine_restart = ls2k_restart; + pm_power_off = ls2k_poweroff; + + return 0; +} + +arch_initcall(ls2k_reset_init); -- cgit v1.2.3