SPEAr: clk: Add VCO-PLL Synthesizer clock

All SPEAr SoC's contain PLLs. Their Fout is derived based on following equations

- In normal mode
  vco = (2 * M[15:8] * Fin)/N

- In Dithered mode
  vco = (2 * M[15:0] * Fin)/(256 * N)

pll_rate = vco/2^p

vco and pll are very closely bound to each other,
"vco needs to program: mode, m & n" and "pll needs to program p",
both share common enable/disable logic and registers.

This patch adds in support for this type of clock.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Reviewed-by: Mike Turquette <mturquette@linaro.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/clk/spear/Makefile b/drivers/clk/spear/Makefile
new file mode 100644
index 0000000..3fc2a30
--- /dev/null
+++ b/drivers/clk/spear/Makefile
@@ -0,0 +1,5 @@
+#
+# SPEAr Clock specific Makefile
+#
+
+obj-y	+= clk.o clk-vco-pll.o