clk: meson: rework and clean drivers dependencies

Initially, the meson clock directory only hosted 2 controllers drivers,
for meson8 and gxbb. At the time, both used the same set of clock drivers
so managing the dependencies was not a big concern.

Since this ancient time, entropy did its job, controllers with different
requirement and specific clock drivers have been added. Unfortunately, we
did not do a great job at managing the dependencies between the
controllers and the different clock drivers. Some drivers, such as
clk-phase or vid-pll-div, are compiled even if they are useless on the
target (meson8). As we are adding new controllers, we need to be able to
pick a driver w/o pulling the whole thing.

The patch aims to clean things up by:
* providing a dedicated CONFIG_ for each clock drivers
* allowing clock drivers to be compiled as a modules, if possible
* stating explicitly which drivers are required by each controller.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://lkml.kernel.org/r/20190201125841.26785-5-jbrunet@baylibre.com

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/clk/meson/clk-regmap.c b/drivers/clk/meson/clk-regmap.c
index c515f67322a3..dcd1757cc5df 100644
--- a/drivers/clk/meson/clk-regmap.c
+++ b/drivers/clk/meson/clk-regmap.c
@@ -4,6 +4,7 @@
  * Author: Jerome Brunet <jbrunet@baylibre.com>
  */
 
+#include <linux/module.h>
 #include "clk-regmap.h"
 
 static int clk_regmap_gate_endisable(struct clk_hw *hw, int enable)
@@ -180,3 +181,7 @@ const struct clk_ops clk_regmap_mux_ro_ops = {
 	.get_parent = clk_regmap_mux_get_parent,
 };
 EXPORT_SYMBOL_GPL(clk_regmap_mux_ro_ops);
+
+MODULE_DESCRIPTION("Amlogic regmap backed clock driver");
+MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
+MODULE_LICENSE("GPL v2");