#include <linux/pm_domain.h>
#include <linux/pm_runtime.h>
#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
#include <linux/notifier.h>
#include "common.h"
return ret;
}
-/**
- * omap_device_count_resources - count number of struct resource entries needed
- * @od: struct omap_device *
- * @flags: Type of resources to include when counting (IRQ/DMA/MEM)
- *
- * Count the number of struct resource entries needed for this
- * omap_device @od. Used by omap_device_build_ss() to determine how
- * much memory to allocate before calling
- * omap_device_fill_resources(). Returns the count.
- */
-static int omap_device_count_resources(struct omap_device *od,
- unsigned long flags)
-{
- int c = 0;
- int i;
-
- for (i = 0; i < od->hwmods_cnt; i++)
- c += omap_hwmod_count_resources(od->hwmods[i], flags);
-
- pr_debug("omap_device: %s: counted %d total resources across %d hwmods\n",
- od->pdev->name, c, od->hwmods_cnt);
-
- return c;
-}
-
-/**
- * omap_device_fill_resources - fill in array of struct resource
- * @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 resource data for this omap_device @od. Used by
- * omap_device_build_ss() after calling omap_device_count_resources().
- * Ideally this function would not be needed at all. If omap_device
- * replaces platform_device, then we can specify our own
- * get_resource()/ get_irq()/etc functions that use the underlying
- * omap_hwmod information. Or if platform_device is extended to use
- * subarchitecture-specific function pointers, the various
- * platform_device functions can simply call omap_device internal
- * functions to get device resources. Hacking around the existing
- * platform_device code wastes memory. Returns 0.
- */
-static int omap_device_fill_resources(struct omap_device *od,
- struct resource *res)
-{
- int i, r;
-
- for (i = 0; i < od->hwmods_cnt; i++) {
- r = omap_hwmod_fill_resources(od->hwmods[i], res);
- res += r;
- }
-
- 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
{
int ret = -ENOMEM;
struct omap_device *od;
- struct resource *res = NULL;
- int i, res_count;
+ int i;
struct omap_hwmod **hwmods;
od = kzalloc(sizeof(struct omap_device), GFP_KERNEL);
od->hwmods = hwmods;
od->pdev = pdev;
-
- /*
- * Non-DT Boot:
- * Here, pdev->num_resources = 0, and we should get all the
- * resources from hwmod.
- *
- * 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).
- * As preparation for the future we examine the OF provided resources
- * to see if we have DMA resources provided already. In this case
- * there is no need to update the resources for the device, we use the
- * OF provided ones.
- *
- * TODO: Once DMA resource is available from OF layer, we should
- * kill filling any resources from hwmod.
- */
- if (!pdev->num_resources) {
- /* Count all resources for the device */
- res_count = omap_device_count_resources(od, IORESOURCE_IRQ |
- IORESOURCE_DMA |
- IORESOURCE_MEM);
- } else {
- /* Take a look if we already have DMA resource via DT */
- for (i = 0; i < pdev->num_resources; i++) {
- struct resource *r = &pdev->resource[i];
-
- /* We have it, no need to touch the resources */
- if (r->flags == IORESOURCE_DMA)
- goto have_everything;
- }
- /* Count only DMA resources for the device */
- res_count = omap_device_count_resources(od, IORESOURCE_DMA);
- /* The device has no DMA resource, no need for update */
- if (!res_count)
- goto have_everything;
-
- 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;
-
- if (!pdev->num_resources) {
- dev_dbg(&pdev->dev, "%s: using %d resources from hwmod\n",
- __func__, res_count);
- omap_device_fill_resources(od, res);
- } else {
- dev_dbg(&pdev->dev,
- "%s: appending %d DMA resources from hwmod\n",
- __func__, res_count - pdev->num_resources);
- memcpy(res, pdev->resource,
- sizeof(struct resource) * pdev->num_resources);
- _od_fill_dma_resources(od, &res[pdev->num_resources]);
- }
-
- ret = platform_device_add_resources(pdev, res, res_count);
- kfree(res);
-
- if (ret)
- goto oda_exit3;
-
-have_everything:
pdev->archdata.od = od;
for (i = 0; i < oh_cnt; i++) {
return od;
-oda_exit3:
- kfree(hwmods);
oda_exit2:
kfree(od);
oda_exit1:
kfree(od);
}
+/**
+ * omap_device_copy_resources - Add legacy IO and IRQ resources
+ * @oh: interconnect target module
+ * @pdev: platform device to copy resources to
+ *
+ * We still have legacy DMA and smartreflex needing resources.
+ * Let's populate what they need until we can eventually just
+ * remove this function. Note that there should be no need to
+ * call this from omap_device_build_from_dt(), nor should there
+ * be any need to call it for other devices.
+ */
+static int
+omap_device_copy_resources(struct omap_hwmod *oh,
+ struct platform_device *pdev)
+{
+ struct device_node *np, *child;
+ struct property *prop;
+ struct resource *res;
+ const char *name;
+ int error, irq = 0;
+
+ if (!oh || !oh->od || !oh->od->pdev) {
+ error = -EINVAL;
+ goto error;
+ }
+
+ np = oh->od->pdev->dev.of_node;
+ if (!np) {
+ error = -ENODEV;
+ goto error;
+ }
+
+ res = kzalloc(sizeof(*res) * 2, GFP_KERNEL);
+ if (!res)
+ return -ENOMEM;
+
+ /* Do we have a dts range for the interconnect target module? */
+ error = omap_hwmod_parse_module_range(oh, np, res);
+
+ /* No ranges, rely on device reg entry */
+ if (error)
+ error = of_address_to_resource(np, 0, res);
+ if (error)
+ goto free;
+
+ /* SmartReflex needs first IO resource name to be "mpu" */
+ res[0].name = "mpu";
+
+ /*
+ * We may have a configured "ti,sysc" interconnect target with a
+ * dts child with the interrupt. If so use the first child's
+ * first interrupt for "ti-hwmods" legacy support.
+ */
+ of_property_for_each_string(np, "compatible", prop, name)
+ if (!strncmp("ti,sysc-", name, 8))
+ break;
+
+ child = of_get_next_available_child(np, NULL);
+
+ if (name)
+ irq = irq_of_parse_and_map(child, 0);
+ if (!irq)
+ irq = irq_of_parse_and_map(np, 0);
+ if (!irq) {
+ error = -EINVAL;
+ goto free;
+ }
+
+ /* Legacy DMA code needs interrupt name to be "0" */
+ res[1].start = irq;
+ res[1].end = irq;
+ res[1].flags = IORESOURCE_IRQ;
+ res[1].name = "0";
+
+ error = platform_device_add_resources(pdev, res, 2);
+
+free:
+ kfree(res);
+
+error:
+ WARN(error, "%s: %s device %s failed: %i\n",
+ __func__, oh->name, dev_name(&pdev->dev),
+ error);
+
+ return error;
+}
+
/**
* omap_device_build - build and register an omap_device with one omap_hwmod
* @pdev_name: name of the platform_device driver to use
int pdev_id,
struct omap_hwmod *oh,
void *pdata, int pdata_len)
-{
- struct omap_hwmod *ohs[] = { oh };
-
- if (!oh)
- return ERR_PTR(-EINVAL);
-
- return omap_device_build_ss(pdev_name, pdev_id, ohs, 1, pdata,
- pdata_len);
-}
-
-/**
- * omap_device_build_ss - build and register an omap_device with multiple hwmods
- * @pdev_name: name of the platform_device driver to use
- * @pdev_id: this platform_device's connection ID
- * @oh: ptr to the single omap_hwmod that backs this omap_device
- * @pdata: platform_data ptr to associate with the platform_device
- * @pdata_len: amount of memory pointed to by @pdata
- *
- * Convenience function for building and registering an omap_device
- * subsystem record. Subsystem records consist of multiple
- * omap_hwmods. This function in turn builds and registers a
- * platform_device record. Returns an ERR_PTR() on error, or passes
- * along the return value of omap_device_register().
- */
-struct platform_device __init *omap_device_build_ss(const char *pdev_name,
- int pdev_id,
- struct omap_hwmod **ohs,
- int oh_cnt, void *pdata,
- int pdata_len)
{
int ret = -ENOMEM;
struct platform_device *pdev;
struct omap_device *od;
- if (!ohs || oh_cnt == 0 || !pdev_name)
+ if (!oh || !pdev_name)
return ERR_PTR(-EINVAL);
if (!pdata && pdata_len > 0)
return ERR_PTR(-EINVAL);
+ if (strncmp(oh->name, "smartreflex", 11) &&
+ strncmp(oh->name, "dma", 3)) {
+ pr_warn("%s need to update %s to probe with dt\na",
+ __func__, pdev_name);
+ ret = -ENODEV;
+ goto odbs_exit;
+ }
+
pdev = platform_device_alloc(pdev_name, pdev_id);
if (!pdev) {
ret = -ENOMEM;
else
dev_set_name(&pdev->dev, "%s", pdev->name);
- od = omap_device_alloc(pdev, ohs, oh_cnt);
+ /*
+ * Must be called before omap_device_alloc() as oh->od
+ * only contains the currently registered omap_device
+ * and will get overwritten by omap_device_alloc().
+ */
+ ret = omap_device_copy_resources(oh, pdev);
+ if (ret)
+ goto odbs_exit1;
+
+ od = omap_device_alloc(pdev, &oh, 1);
if (IS_ERR(od))
goto odbs_exit1;
git.samba.org / sfrench / cifs-2.6.git / blobdiff