ARM: OMAP3: PM: Fix the Invalid CM_CLKSTCTRL reg access.

In OMAP2/3 some of the clock-domains which did not have control
facility were being falsely written to and read using the CM_CLKSTCTRL
register though it did not exist for them. One check is added to remove
this flaw.

Signed-off-by: Abhijit Pagare <abhijitpagare@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoit Cousson <b-cousson@ti.com>
Cc: Rajendra Nayak <rnayak@ti.com>

diff --git a/arch/arm/mach-omap2/clockdomain.c b/arch/arm/mach-omap2/clockdomain.c
index 1a45ed1..dd285f0 100644 (file)
--- a/arch/arm/mach-omap2/clockdomain.c
+++ b/arch/arm/mach-omap2/clockdomain.c
@@ -559,7 +559,7 @@ int omap2_clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk)
         * downstream clocks for debugging purposes?
         */
 
-       if (!clkdm || !clk)
+       if (!clkdm || !clk || !clkdm->clktrctrl_mask)
                return -EINVAL;
 
        if (atomic_inc_return(&clkdm->usecount) > 1)
@@ -610,7 +610,7 @@ int omap2_clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk)
         * downstream clocks for debugging purposes?
         */
 
-       if (!clkdm || !clk)
+       if (!clkdm || !clk || !clkdm->clktrctrl_mask)
                return -EINVAL;
 
 #ifdef DEBUG