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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /arch/arm/mach-imx/pm-imx7ulp.c | |
parent | Initial commit. (diff) | |
download | linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/mach-imx/pm-imx7ulp.c')
-rw-r--r-- | arch/arm/mach-imx/pm-imx7ulp.c | 69 |
1 files changed, 69 insertions, 0 deletions
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 <aisheng.dong@nxp.com> + */ + +#include <linux/io.h> +#include <linux/of.h> +#include <linux/of_address.h> + +#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); +} |