| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * OMAP IOMMU quirks for various TI SoCs |
| * |
| * Copyright (C) 2015-2019 Texas Instruments Incorporated - http://www.ti.com/ |
| * Suman Anna <s-anna@ti.com> |
| */ |
| |
| #include <linux/platform_device.h> |
| #include <linux/err.h> |
| |
| #include "omap_hwmod.h" |
| #include "omap_device.h" |
| #include "powerdomain.h" |
| |
| int omap_iommu_set_pwrdm_constraint(struct platform_device *pdev, bool request, |
| u8 *pwrst) |
| { |
| struct powerdomain *pwrdm; |
| struct omap_device *od; |
| u8 next_pwrst; |
| |
| od = to_omap_device(pdev); |
| if (!od) |
| return -ENODEV; |
| |
| if (od->hwmods_cnt != 1) |
| return -EINVAL; |
| |
| pwrdm = omap_hwmod_get_pwrdm(od->hwmods[0]); |
| if (!pwrdm) |
| return -EINVAL; |
| |
| if (request) |
| *pwrst = pwrdm_read_next_pwrst(pwrdm); |
| |
| if (*pwrst > PWRDM_POWER_RET) |
| return 0; |
| |
| next_pwrst = request ? PWRDM_POWER_ON : *pwrst; |
| |
| return pwrdm_set_next_pwrst(pwrdm, next_pwrst); |
| } |
