| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /* |
| 3 | * OMAP IOMMU quirks for various TI SoCs |
| 4 | * |
| 5 | * Copyright (C) 2015-2019 Texas Instruments Incorporated - http://www.ti.com/ |
| 6 | * Suman Anna <s-anna@ti.com> |
| 7 | */ |
| 8 | |
| 9 | #include <linux/platform_device.h> |
| 10 | #include <linux/err.h> |
| 11 | |
| 12 | #include "omap_hwmod.h" |
| 13 | #include "omap_device.h" |
| 14 | #include "powerdomain.h" |
| 15 | |
| 16 | int omap_iommu_set_pwrdm_constraint(struct platform_device *pdev, bool request, |
| 17 | u8 *pwrst) |
| 18 | { |
| 19 | struct powerdomain *pwrdm; |
| 20 | struct omap_device *od; |
| 21 | u8 next_pwrst; |
| 22 | |
| 23 | od = to_omap_device(pdev); |
| 24 | if (!od) |
| 25 | return -ENODEV; |
| 26 | |
| 27 | if (od->hwmods_cnt != 1) |
| 28 | return -EINVAL; |
| 29 | |
| 30 | pwrdm = omap_hwmod_get_pwrdm(od->hwmods[0]); |
| 31 | if (!pwrdm) |
| 32 | return -EINVAL; |
| 33 | |
| 34 | if (request) |
| 35 | *pwrst = pwrdm_read_next_pwrst(pwrdm); |
| 36 | |
| 37 | if (*pwrst > PWRDM_POWER_RET) |
| 38 | return 0; |
| 39 | |
| 40 | next_pwrst = request ? PWRDM_POWER_ON : *pwrst; |
| 41 | |
| 42 | return pwrdm_set_next_pwrst(pwrdm, next_pwrst); |
| 43 | } |