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69 lines
1.5 KiB
69 lines
1.5 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Copyright (C) 2016 Freescale Semiconductor, Inc. |
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* Copyright 2017-2018 NXP |
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* Author: Dong Aisheng <[email protected]> |
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*/ |
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#include <linux/io.h> |
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#include <linux/of.h> |
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#include <linux/of_address.h> |
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#include "common.h" |
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#define SMC_PMCTRL 0x10 |
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#define BP_PMCTRL_PSTOPO 16 |
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#define PSTOPO_PSTOP3 0x3 |
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#define PSTOPO_PSTOP2 0x2 |
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#define PSTOPO_PSTOP1 0x1 |
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#define BP_PMCTRL_RUNM 8 |
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#define RUNM_RUN 0 |
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#define BP_PMCTRL_STOPM 0 |
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#define STOPM_STOP 0 |
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#define BM_PMCTRL_PSTOPO (3 << BP_PMCTRL_PSTOPO) |
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#define BM_PMCTRL_RUNM (3 << BP_PMCTRL_RUNM) |
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#define BM_PMCTRL_STOPM (7 << BP_PMCTRL_STOPM) |
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static void __iomem *smc1_base; |
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int imx7ulp_set_lpm(enum ulp_cpu_pwr_mode mode) |
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{ |
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u32 val = readl_relaxed(smc1_base + SMC_PMCTRL); |
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/* clear all */ |
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val &= ~(BM_PMCTRL_RUNM | BM_PMCTRL_STOPM | BM_PMCTRL_PSTOPO); |
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switch (mode) { |
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case ULP_PM_RUN: |
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/* system/bus clock enabled */ |
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val |= PSTOPO_PSTOP3 << BP_PMCTRL_PSTOPO; |
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break; |
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case ULP_PM_WAIT: |
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/* system clock disabled, bus clock enabled */ |
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val |= PSTOPO_PSTOP2 << BP_PMCTRL_PSTOPO; |
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break; |
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case ULP_PM_STOP: |
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/* system/bus clock disabled */ |
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val |= PSTOPO_PSTOP1 << BP_PMCTRL_PSTOPO; |
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break; |
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default: |
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return -EINVAL; |
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} |
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writel_relaxed(val, smc1_base + SMC_PMCTRL); |
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return 0; |
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} |
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void __init imx7ulp_pm_init(void) |
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{ |
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struct device_node *np; |
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np = of_find_compatible_node(NULL, NULL, "fsl,imx7ulp-smc1"); |
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smc1_base = of_iomap(np, 0); |
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of_node_put(np); |
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WARN_ON(!smc1_base); |
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imx7ulp_set_lpm(ULP_PM_RUN); |
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}
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