clk: add CONFIG_CLK_AUTO_ID

Add a new config CONFIG_CLK_AUTO_ID to support a unique clk id
for all the clock providers, managed by clk uclass, when the clock
reference arg[0] is the same.

When the CONFIG is activated, the clock id is limited to the lower
CLK_ID_SZ = 24 bits in default clock xlate function
and the sequence number + 1 of the clk provider device is
added for the 8 higher bits.

We use sequence number + 1 to avoid the "dummy" clock id = 0,
used for invalid clock when CCF is activated.

When this config is activated, the new function clk_get_id()
should be used to get back the internal reference to clock
for the each clock provider.

Signed-off-by: Patrick Delaunay <[email protected]>
Signed-off-by: Patrice Chotard <[email protected]>
Cc: Lukasz Majewski <[email protected]>
Cc: Sean Anderson <[email protected]>
Reviewed-by: Patrick Delaunay <[email protected]>
Reviewed-by: Patrice Chotard <[email protected]>

1 files changed, 8 insertions, 1 deletions

diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 267757939e0..2d754fa4287 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -15,10 +15,17 @@
 
 struct udevice;
 
+/* update clock ID for the dev = clock provider, compatible with CLK_AUTO_ID */
+static inline void dev_clk_dm(const struct udevice *dev, ulong id, struct clk *clk)
+{
+	if (!IS_ERR(clk))
+		clk->id = CLK_ID(dev, id);
+}
+
 static inline void clk_dm(ulong id, struct clk *clk)
 {
 	if (!IS_ERR(clk))
-		clk->id = id;
+		clk->id = CLK_ID(clk->dev, id);
 }
 
 /*