ARM: OMAP: hwmod: fix an incorrect clk type cast with _get_clkdm

If the main clock for a hwmod is of basic clock type, it is illegal to type
cast this to clk_hw_omap and will result in bogus data. Fixed by checking
the clock flags before attempting the type cast.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index 8a1b5e0bad40..cc24c95b77e5 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -686,6 +686,8 @@ static struct clockdomain *_get_clkdm(struct omap_hwmod *oh)
         if (oh->clkdm) {
                 return oh->clkdm;
         } else if (oh->_clk) {
+                if (__clk_get_flags(oh->_clk) & CLK_IS_BASIC)
+                        return NULL;
                 clk = to_clk_hw_omap(__clk_get_hw(oh->_clk));
                 return  clk->clkdm;
         }