clk: keystone: Add sci-clk driver support

In K2G, the clock handling is done through firmware executing on a
separate core. Linux kernel needs to communicate to the firmware
through TI system control interface to access any power management
related resources, including clocks.

The keystone sci-clk driver does this, by communicating to the
firmware through the TI SCI driver. The driver adds support for
registering clocks through DT, and basic required clock operations
like prepare/get_rate, etc.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
[sboyd@codeaurora.org: Make ti_sci_init_clocks() static]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/clk/keystone/Kconfig b/drivers/clk/keystone/Kconfig
new file mode 100644
index 000000000000..1fea328a36fe
--- /dev/null
+++ b/drivers/clk/keystone/Kconfig
@@ -0,0 +1,15 @@
+config COMMON_CLK_KEYSTONE
+	tristate "Clock drivers for Keystone based SOCs"
+	depends on (ARCH_KEYSTONE || COMPILE_TEST) && OF
+	---help---
+	  Supports clock drivers for Keystone based SOCs. These SOCs have local
+	  a power sleep control module that gate the clock to the IPs and PLLs.
+
+config TI_SCI_CLK
+	tristate "TI System Control Interface clock drivers"
+	depends on (ARCH_KEYSTONE || COMPILE_TEST) && OF
+	default TI_SCI_PROTOCOL
+	---help---
+	  This adds the clock driver support over TI System Control Interface.
+	  If you wish to use clock resources from the PMMC firmware, say Y.
+	  Otherwise, say N.