diff options
Diffstat (limited to 'drivers/soc/tegra/pmc-tegra186.c')
| -rw-r--r-- | drivers/soc/tegra/pmc-tegra186.c | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/drivers/soc/tegra/pmc-tegra186.c b/drivers/soc/tegra/pmc-tegra186.c deleted file mode 100644 index 6f5c6f98ba92..000000000000 --- a/drivers/soc/tegra/pmc-tegra186.c +++ /dev/null @@ -1,169 +0,0 @@ -/* - * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - */ - -#define pr_fmt(fmt) "tegra-pmc: " fmt - -#include <linux/io.h> -#include <linux/module.h> -#include <linux/of.h> -#include <linux/platform_device.h> -#include <linux/reboot.h> - -#include <asm/system_misc.h> - -#define PMC_CNTRL 0x000 -#define PMC_CNTRL_MAIN_RST BIT(4) - -#define PMC_RST_STATUS 0x070 - -#define WAKE_AOWAKE_CTRL 0x4f4 -#define WAKE_AOWAKE_CTRL_INTR_POLARITY BIT(0) - -#define SCRATCH_SCRATCH0 0x2000 -#define SCRATCH_SCRATCH0_MODE_RECOVERY BIT(31) -#define SCRATCH_SCRATCH0_MODE_BOOTLOADER BIT(30) -#define SCRATCH_SCRATCH0_MODE_RCM BIT(1) -#define SCRATCH_SCRATCH0_MODE_MASK (SCRATCH_SCRATCH0_MODE_RECOVERY | \ - SCRATCH_SCRATCH0_MODE_BOOTLOADER | \ - SCRATCH_SCRATCH0_MODE_RCM) - -struct tegra_pmc { - struct device *dev; - void __iomem *regs; - void __iomem *wake; - void __iomem *aotag; - void __iomem *scratch; - - void (*system_restart)(enum reboot_mode mode, const char *cmd); - struct notifier_block restart; -}; - -static int tegra186_pmc_restart_notify(struct notifier_block *nb, - unsigned long action, - void *data) -{ - struct tegra_pmc *pmc = container_of(nb, struct tegra_pmc, restart); - const char *cmd = data; - u32 value; - - value = readl(pmc->scratch + SCRATCH_SCRATCH0); - value &= ~SCRATCH_SCRATCH0_MODE_MASK; - - if (cmd) { - if (strcmp(cmd, "recovery") == 0) - value |= SCRATCH_SCRATCH0_MODE_RECOVERY; - - if (strcmp(cmd, "bootloader") == 0) - value |= SCRATCH_SCRATCH0_MODE_BOOTLOADER; - - if (strcmp(cmd, "forced-recovery") == 0) - value |= SCRATCH_SCRATCH0_MODE_RCM; - } - - writel(value, pmc->scratch + SCRATCH_SCRATCH0); - - /* - * If available, call the system restart implementation that was - * registered earlier (typically PSCI). - */ - if (pmc->system_restart) { - pmc->system_restart(reboot_mode, cmd); - return NOTIFY_DONE; - } - - /* reset everything but SCRATCH0_SCRATCH0 and PMC_RST_STATUS */ - value = readl(pmc->regs + PMC_CNTRL); - value |= PMC_CNTRL_MAIN_RST; - writel(value, pmc->regs + PMC_CNTRL); - - return NOTIFY_DONE; -} - -static int tegra186_pmc_setup(struct tegra_pmc *pmc) -{ - struct device_node *np = pmc->dev->of_node; - bool invert; - u32 value; - - invert = of_property_read_bool(np, "nvidia,invert-interrupt"); - - value = readl(pmc->wake + WAKE_AOWAKE_CTRL); - - if (invert) - value |= WAKE_AOWAKE_CTRL_INTR_POLARITY; - else - value &= ~WAKE_AOWAKE_CTRL_INTR_POLARITY; - - writel(value, pmc->wake + WAKE_AOWAKE_CTRL); - - /* - * We need to hook any system restart implementation registered - * previously so we can write SCRATCH_SCRATCH0 before reset. - */ - pmc->system_restart = arm_pm_restart; - arm_pm_restart = NULL; - - pmc->restart.notifier_call = tegra186_pmc_restart_notify; - pmc->restart.priority = 128; - - return register_restart_handler(&pmc->restart); -} - -static int tegra186_pmc_probe(struct platform_device *pdev) -{ - struct tegra_pmc *pmc; - struct resource *res; - - pmc = devm_kzalloc(&pdev->dev, sizeof(*pmc), GFP_KERNEL); - if (!pmc) - return -ENOMEM; - - pmc->dev = &pdev->dev; - - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pmc"); - pmc->regs = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(pmc->regs)) - return PTR_ERR(pmc->regs); - - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "wake"); - pmc->wake = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(pmc->wake)) - return PTR_ERR(pmc->wake); - - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "aotag"); - pmc->aotag = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(pmc->aotag)) - return PTR_ERR(pmc->aotag); - - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "scratch"); - pmc->scratch = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(pmc->scratch)) - return PTR_ERR(pmc->scratch); - - return tegra186_pmc_setup(pmc); -} - -static const struct of_device_id tegra186_pmc_of_match[] = { - { .compatible = "nvidia,tegra186-pmc" }, - { /* sentinel */ } -}; -MODULE_DEVICE_TABLE(of, tegra186_pmc_of_match); - -static struct platform_driver tegra186_pmc_driver = { - .driver = { - .name = "tegra186-pmc", - .of_match_table = tegra186_pmc_of_match, - }, - .probe = tegra186_pmc_probe, -}; -builtin_platform_driver(tegra186_pmc_driver); |