From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- arch/arm/mach-imx/pm-imx7ulp.c | 69 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 arch/arm/mach-imx/pm-imx7ulp.c (limited to 'arch/arm/mach-imx/pm-imx7ulp.c') diff --git a/arch/arm/mach-imx/pm-imx7ulp.c b/arch/arm/mach-imx/pm-imx7ulp.c new file mode 100644 index 000000000..2e756d819 --- /dev/null +++ b/arch/arm/mach-imx/pm-imx7ulp.c @@ -0,0 +1,69 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2016 Freescale Semiconductor, Inc. + * Copyright 2017-2018 NXP + * Author: Dong Aisheng + */ + +#include +#include +#include + +#include "common.h" + +#define SMC_PMCTRL 0x10 +#define BP_PMCTRL_PSTOPO 16 +#define PSTOPO_PSTOP3 0x3 +#define PSTOPO_PSTOP2 0x2 +#define PSTOPO_PSTOP1 0x1 +#define BP_PMCTRL_RUNM 8 +#define RUNM_RUN 0 +#define BP_PMCTRL_STOPM 0 +#define STOPM_STOP 0 + +#define BM_PMCTRL_PSTOPO (3 << BP_PMCTRL_PSTOPO) +#define BM_PMCTRL_RUNM (3 << BP_PMCTRL_RUNM) +#define BM_PMCTRL_STOPM (7 << BP_PMCTRL_STOPM) + +static void __iomem *smc1_base; + +int imx7ulp_set_lpm(enum ulp_cpu_pwr_mode mode) +{ + u32 val = readl_relaxed(smc1_base + SMC_PMCTRL); + + /* clear all */ + val &= ~(BM_PMCTRL_RUNM | BM_PMCTRL_STOPM | BM_PMCTRL_PSTOPO); + + switch (mode) { + case ULP_PM_RUN: + /* system/bus clock enabled */ + val |= PSTOPO_PSTOP3 << BP_PMCTRL_PSTOPO; + break; + case ULP_PM_WAIT: + /* system clock disabled, bus clock enabled */ + val |= PSTOPO_PSTOP2 << BP_PMCTRL_PSTOPO; + break; + case ULP_PM_STOP: + /* system/bus clock disabled */ + val |= PSTOPO_PSTOP1 << BP_PMCTRL_PSTOPO; + break; + default: + return -EINVAL; + } + + writel_relaxed(val, smc1_base + SMC_PMCTRL); + + return 0; +} + +void __init imx7ulp_pm_init(void) +{ + struct device_node *np; + + np = of_find_compatible_node(NULL, NULL, "fsl,imx7ulp-smc1"); + smc1_base = of_iomap(np, 0); + of_node_put(np); + WARN_ON(!smc1_base); + + imx7ulp_set_lpm(ULP_PM_RUN); +} -- cgit v1.2.3