diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index 6ca8e519968d..7768804457e3 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -3157,6 +3157,33 @@ int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res) return r; } +/** + * omap_hwmod_fill_dma_resources - fill struct resource array with dma data + * @oh: struct omap_hwmod * + * @res: pointer to the array of struct resource to fill + * + * Fill the struct resource array @res with dma resource data from the + * omap_hwmod @oh. Intended to be called by code that registers + * omap_devices. See also omap_hwmod_count_resources(). Returns the + * number of array elements filled. + */ +int omap_hwmod_fill_dma_resources(struct omap_hwmod *oh, struct resource *res) +{ + int i, sdma_reqs_cnt; + int r = 0; + + sdma_reqs_cnt = _count_sdma_reqs(oh); + for (i = 0; i < sdma_reqs_cnt; i++) { + (res + r)->name = (oh->sdma_reqs + i)->name; + (res + r)->start = (oh->sdma_reqs + i)->dma_req; + (res + r)->end = (oh->sdma_reqs + i)->dma_req; + (res + r)->flags = IORESOURCE_DMA; + r++; + } + + return r; +} + /** * omap_hwmod_get_resource_byname - fetch IP block integration data by name * @oh: struct omap_hwmod * to operate on diff --git a/arch/arm/plat-omap/include/plat/omap_hwmod.h b/arch/arm/plat-omap/include/plat/omap_hwmod.h index 6132972aff37..5857b9cd6eb9 100644 --- a/arch/arm/plat-omap/include/plat/omap_hwmod.h +++ b/arch/arm/plat-omap/include/plat/omap_hwmod.h @@ -615,6 +615,7 @@ int omap_hwmod_softreset(struct omap_hwmod *oh); int omap_hwmod_count_resources(struct omap_hwmod *oh); int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res); +int omap_hwmod_fill_dma_resources(struct omap_hwmod *oh, struct resource *res); int omap_hwmod_get_resource_byname(struct omap_hwmod *oh, unsigned int type, const char *name, struct resource *res); diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c index ff57b5aeba4e..6f5c58096819 100644 --- a/arch/arm/plat-omap/omap_device.c +++ b/arch/arm/plat-omap/omap_device.c @@ -493,6 +493,33 @@ static int omap_device_fill_resources(struct omap_device *od, return 0; } +/** + * _od_fill_dma_resources - fill in array of struct resource with dma resources + * @od: struct omap_device * + * @res: pointer to an array of struct resource to be filled in + * + * Populate one or more empty struct resource pointed to by @res with + * the dma resource data for this omap_device @od. Used by + * omap_device_alloc() after calling omap_device_count_resources(). + * + * Ideally this function would not be needed at all. If we have + * mechanism to get dma resources from DT. + * + * Returns 0. + */ +static int _od_fill_dma_resources(struct omap_device *od, + struct resource *res) +{ + int i, r; + + for (i = 0; i < od->hwmods_cnt; i++) { + r = omap_hwmod_fill_dma_resources(od->hwmods[i], res); + res += r; + } + + return 0; +} + /** * omap_device_alloc - allocate an omap_device * @pdev: platform_device that will be included in this omap_device @@ -532,24 +559,44 @@ struct omap_device *omap_device_alloc(struct platform_device *pdev, od->hwmods = hwmods; od->pdev = pdev; - /* - * HACK: Ideally the resources from DT should match, and hwmod - * should just add the missing ones. Since the name is not - * properly populated by DT, stick to hwmod resources only. - */ - if (pdev->num_resources && pdev->resource) - dev_warn(&pdev->dev, "%s(): resources already allocated %d\n", - __func__, pdev->num_resources); - res_count = omap_device_count_resources(od); - if (res_count > 0) { - dev_dbg(&pdev->dev, "%s(): resources allocated from hwmod %d\n", - __func__, res_count); + /* + * DT Boot: + * OF framework will construct the resource structure (currently + * does for MEM & IRQ resource) and we should respect/use these + * resources, killing hwmod dependency. + * If pdev->num_resources > 0, we assume that MEM & IRQ resources + * have been allocated by OF layer already (through DTB). + * + * Non-DT Boot: + * Here, pdev->num_resources = 0, and we should get all the + * resources from hwmod. + * + * TODO: Once DMA resource is available from OF layer, we should + * kill filling any resources from hwmod. + */ + if (res_count > pdev->num_resources) { + /* Allocate resources memory to account for new resources */ res = kzalloc(sizeof(struct resource) * res_count, GFP_KERNEL); if (!res) goto oda_exit3; - omap_device_fill_resources(od, res); + /* + * If pdev->num_resources > 0, then assume that, + * MEM and IRQ resources will only come from DT and only + * fill DMA resource from hwmod layer. + */ + if (pdev->num_resources && pdev->resource) { + dev_dbg(&pdev->dev, "%s(): resources already allocated %d\n", + __func__, res_count); + memcpy(res, pdev->resource, + sizeof(struct resource) * pdev->num_resources); + _od_fill_dma_resources(od, &res[pdev->num_resources]); + } else { + dev_dbg(&pdev->dev, "%s(): using resources from hwmod %d\n", + __func__, res_count); + omap_device_fill_resources(od, res); + } ret = platform_device_add_resources(pdev, res, res_count); kfree(res);