static int am33xx_prepare_push_sram_idle(void) { struct device_node *np; int ret; ret = ti_emif_copy_pm_function_table(pm_sram->emif_sram_table); if (ret) { pr_err("PM: %s: EMIF function copy failed\n", __func__); return -EPROBE_DEFER; } np = of_find_compatible_node(NULL, NULL, "ti,omap3-mpu"); if (!np) { np = of_find_compatible_node(NULL, NULL, "ti,omap4-mpu"); if (!np) { pr_warn("PM: %s: Unable to find device node for mpu\n", __func__); return -ENODEV; } } sram_pool = of_get_named_gen_pool(np, "sram", 0); if (!sram_pool) { pr_warn("PM: %s: Unable to get sram pool for ocmcram\n", __func__); return -ENODEV; } ocmcram_location = gen_pool_alloc(sram_pool, *pm_sram->do_wfi_sz); if (!ocmcram_location) { pr_warn("PM: %s: Unable to allocate memory from ocmcram\n", __func__); return -EINVAL; } /* Save physical address to calculate resume offset during pm init */ am33xx_do_wfi_sram_phys = gen_pool_virt_to_phys(sram_pool, ocmcram_location); return 0; }
static int mmp_tdma_probe(struct platform_device *pdev) { enum mmp_tdma_type type; const struct of_device_id *of_id; struct mmp_tdma_device *tdev; struct resource *iores; int i, ret; int irq = 0, irq_num = 0; int chan_num = TDMA_CHANNEL_NUM; struct gen_pool *pool = NULL; of_id = of_match_device(mmp_tdma_dt_ids, &pdev->dev); if (of_id) type = (enum mmp_tdma_type) of_id->data; else type = platform_get_device_id(pdev)->driver_data; /* always have couple channels */ tdev = devm_kzalloc(&pdev->dev, sizeof(*tdev), GFP_KERNEL); if (!tdev) return -ENOMEM; tdev->dev = &pdev->dev; for (i = 0; i < chan_num; i++) { if (platform_get_irq(pdev, i) > 0) irq_num++; } iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); tdev->base = devm_ioremap_resource(&pdev->dev, iores); if (IS_ERR(tdev->base)) return PTR_ERR(tdev->base); INIT_LIST_HEAD(&tdev->device.channels); if (pdev->dev.of_node) pool = of_get_named_gen_pool(pdev->dev.of_node, "asram", 0); else pool = sram_get_gpool("asram"); if (!pool) { dev_err(&pdev->dev, "asram pool not available\n"); return -ENOMEM; } if (irq_num != chan_num) { irq = platform_get_irq(pdev, 0); ret = devm_request_irq(&pdev->dev, irq, mmp_tdma_int_handler, 0, "tdma", tdev); if (ret) return ret; } /* initialize channel parameters */ for (i = 0; i < chan_num; i++) { irq = (irq_num != chan_num) ? 0 : platform_get_irq(pdev, i); ret = mmp_tdma_chan_init(tdev, i, irq, type, pool); if (ret) return ret; } dma_cap_set(DMA_SLAVE, tdev->device.cap_mask); dma_cap_set(DMA_CYCLIC, tdev->device.cap_mask); tdev->device.dev = &pdev->dev; tdev->device.device_alloc_chan_resources = mmp_tdma_alloc_chan_resources; tdev->device.device_free_chan_resources = mmp_tdma_free_chan_resources; tdev->device.device_prep_dma_cyclic = mmp_tdma_prep_dma_cyclic; tdev->device.device_tx_status = mmp_tdma_tx_status; tdev->device.device_issue_pending = mmp_tdma_issue_pending; tdev->device.device_config = mmp_tdma_config; tdev->device.device_pause = mmp_tdma_pause_chan; tdev->device.device_resume = mmp_tdma_resume_chan; tdev->device.device_terminate_all = mmp_tdma_terminate_all; tdev->device.copy_align = TDMA_ALIGNMENT; dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); platform_set_drvdata(pdev, tdev); ret = dma_async_device_register(&tdev->device); if (ret) { dev_err(tdev->device.dev, "unable to register\n"); return ret; } if (pdev->dev.of_node) { ret = of_dma_controller_register(pdev->dev.of_node, mmp_tdma_xlate, tdev); if (ret) { dev_err(tdev->device.dev, "failed to register controller\n"); dma_async_device_unregister(&tdev->device); } } dev_info(tdev->device.dev, "initialized\n"); return 0; }