tree eeaf0f029ccf5cc128a91ff889914ad6136b0f2a
parent 0601c1be9f87c059999821e61d6ff9fb14ef554d
author Fabrice Gasnier <fabrice.gasnier@st.com> 1532442688 +0200
committer Tom Rini <trini@konsulko.com> 1533340390 -0400

clk: add clk_valid()

Add clk_valid() to check for optional clocks are valid.
Call clk_valid() in test/dm/clk.c and add relevant test routine to
sandbox clk tests.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>