drm/msm: Add a helper function to parse clock names

Add a helper function to parse the clock names and set up
the bulk data so we can take advantage of the bulk clock
functions instead of rolling our own. This is added
as a helper function so the upcoming a6xx GMU code can
also take advantage of it.

Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

1 files changed, 57 insertions, 0 deletions

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 46876bc8b707..c1abad8a8612 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -81,6 +81,63 @@ module_param(modeset, bool, 0600);
  * Util/helpers:
  */
 
+int msm_clk_bulk_get(struct device *dev, struct clk_bulk_data **bulk)
+{
+	struct property *prop;
+	const char *name;
+	struct clk_bulk_data *local;
+	int i = 0, ret, count;
+
+	count = of_property_count_strings(dev->of_node, "clock-names");
+	if (count < 1)
+		return 0;
+
+	local = devm_kcalloc(dev, sizeof(struct clk_bulk_data *),
+		count, GFP_KERNEL);
+	if (!local)
+		return -ENOMEM;
+
+	of_property_for_each_string(dev->of_node, "clock-names", prop, name) {
+		local[i].id = devm_kstrdup(dev, name, GFP_KERNEL);
+		if (!local[i].id) {
+			devm_kfree(dev, local);
+			return -ENOMEM;
+		}
+
+		i++;
+	}
+
+	ret = devm_clk_bulk_get(dev, count, local);
+
+	if (ret) {
+		for (i = 0; i < count; i++)
+			devm_kfree(dev, (void *) local[i].id);
+		devm_kfree(dev, local);
+
+		return ret;
+	}
+
+	*bulk = local;
+	return count;
+}
+
+struct clk *msm_clk_bulk_get_clock(struct clk_bulk_data *bulk, int count,
+		const char *name)
+{
+	int i;
+	char n[32];
+
+	snprintf(n, sizeof(n), "%s_clk", name);
+
+	for (i = 0; bulk && i < count; i++) {
+		if (!strcmp(bulk[i].id, name) || !strcmp(bulk[i].id, n))
+			return bulk[i].clk;
+	}
+
+
+	return NULL;
+}
+
 struct clk *msm_clk_get(struct platform_device *pdev, const char *name)
 {
 	struct clk *clk;