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-rw-r--r--drivers/interconnect/bulk.c159
1 files changed, 159 insertions, 0 deletions
diff --git a/drivers/interconnect/bulk.c b/drivers/interconnect/bulk.c
new file mode 100644
index 000000000..8b1d8a412
--- /dev/null
+++ b/drivers/interconnect/bulk.c
@@ -0,0 +1,159 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/interconnect-provider.h>
+#include <linux/device.h>
+#include <linux/export.h>
+
+/**
+ * of_icc_bulk_get() - get interconnect paths
+ * @dev: the device requesting the path
+ * @num_paths: the number of icc_bulk_data
+ * @paths: the table with the paths we want to get
+ *
+ * Returns 0 on success or negative errno otherwise.
+ */
+int __must_check of_icc_bulk_get(struct device *dev, int num_paths,
+ struct icc_bulk_data *paths)
+{
+ int ret, i;
+
+ for (i = 0; i < num_paths; i++) {
+ paths[i].path = of_icc_get(dev, paths[i].name);
+ if (IS_ERR(paths[i].path)) {
+ ret = PTR_ERR(paths[i].path);
+ if (ret != -EPROBE_DEFER)
+ dev_err(dev, "of_icc_get() failed on path %s (%d)\n",
+ paths[i].name, ret);
+ paths[i].path = NULL;
+ goto err;
+ }
+ }
+
+ return 0;
+
+err:
+ icc_bulk_put(i, paths);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(of_icc_bulk_get);
+
+/**
+ * icc_bulk_put() - put a list of interconnect paths
+ * @num_paths: the number of icc_bulk_data
+ * @paths: the icc_bulk_data table with the paths being put
+ */
+void icc_bulk_put(int num_paths, struct icc_bulk_data *paths)
+{
+ while (--num_paths >= 0) {
+ icc_put(paths[num_paths].path);
+ paths[num_paths].path = NULL;
+ }
+}
+EXPORT_SYMBOL_GPL(icc_bulk_put);
+
+/**
+ * icc_bulk_set_bw() - set bandwidth to a set of paths
+ * @num_paths: the number of icc_bulk_data
+ * @paths: the icc_bulk_data table containing the paths and bandwidth
+ *
+ * Returns 0 on success or negative errno otherwise.
+ */
+int icc_bulk_set_bw(int num_paths, const struct icc_bulk_data *paths)
+{
+ int ret = 0;
+ int i;
+
+ for (i = 0; i < num_paths; i++) {
+ ret = icc_set_bw(paths[i].path, paths[i].avg_bw, paths[i].peak_bw);
+ if (ret) {
+ pr_err("icc_set_bw() failed on path %s (%d)\n", paths[i].name, ret);
+ return ret;
+ }
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(icc_bulk_set_bw);
+
+/**
+ * icc_bulk_enable() - enable a previously disabled set of paths
+ * @num_paths: the number of icc_bulk_data
+ * @paths: the icc_bulk_data table containing the paths and bandwidth
+ *
+ * Returns 0 on success or negative errno otherwise.
+ */
+int icc_bulk_enable(int num_paths, const struct icc_bulk_data *paths)
+{
+ int ret, i;
+
+ for (i = 0; i < num_paths; i++) {
+ ret = icc_enable(paths[i].path);
+ if (ret) {
+ pr_err("icc_enable() failed on path %s (%d)\n", paths[i].name, ret);
+ goto err;
+ }
+ }
+
+ return 0;
+
+err:
+ icc_bulk_disable(i, paths);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(icc_bulk_enable);
+
+/**
+ * icc_bulk_disable() - disable a set of interconnect paths
+ * @num_paths: the number of icc_bulk_data
+ * @paths: the icc_bulk_data table containing the paths and bandwidth
+ */
+void icc_bulk_disable(int num_paths, const struct icc_bulk_data *paths)
+{
+ while (--num_paths >= 0)
+ icc_disable(paths[num_paths].path);
+}
+EXPORT_SYMBOL_GPL(icc_bulk_disable);
+
+struct icc_bulk_devres {
+ struct icc_bulk_data *paths;
+ int num_paths;
+};
+
+static void devm_icc_bulk_release(struct device *dev, void *res)
+{
+ struct icc_bulk_devres *devres = res;
+
+ icc_bulk_put(devres->num_paths, devres->paths);
+}
+
+/**
+ * devm_of_icc_bulk_get() - resource managed of_icc_bulk_get
+ * @dev: the device requesting the path
+ * @num_paths: the number of icc_bulk_data
+ * @paths: the table with the paths we want to get
+ *
+ * Returns 0 on success or negative errno otherwise.
+ */
+int devm_of_icc_bulk_get(struct device *dev, int num_paths, struct icc_bulk_data *paths)
+{
+ struct icc_bulk_devres *devres;
+ int ret;
+
+ devres = devres_alloc(devm_icc_bulk_release, sizeof(*devres), GFP_KERNEL);
+ if (!devres)
+ return -ENOMEM;
+
+ ret = of_icc_bulk_get(dev, num_paths, paths);
+ if (!ret) {
+ devres->paths = paths;
+ devres->num_paths = num_paths;
+ devres_add(dev, devres);
+ } else {
+ devres_free(devres);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(devm_of_icc_bulk_get);