1 files changed, 6 insertions, 1 deletions

diff --git a/arch/powerpc/platforms/85xx/p1022_ds.c b/arch/powerpc/platforms/85xx/p1022_ds.c
index e083e1f4a6f4..266b3aadfe5e 100644
--- a/arch/powerpc/platforms/85xx/p1022_ds.c
+++ b/arch/powerpc/platforms/85xx/p1022_ds.c
@@ -195,8 +195,13 @@ void p1022ds_set_pixel_clock(unsigned int pixclock)
         do_div(temp, pixclock);
         freq = temp;
 
-        /* pixclk is the ratio of the platform clock to the pixel clock */
+        /*
+         * 'pxclk' is the ratio of the platform clock to the pixel clock.
+         * This number is programmed into the CLKDVDR register, and the valid
+         * range of values is 2-255.
+         */
         pxclk = DIV_ROUND_CLOSEST(fsl_get_sys_freq(), freq);
+        pxclk = clamp_t(u32, pxclk, 2, 255);
 
         /* Disable the pixel clock, and set it to non-inverted and no delay */
         clrbits32(&guts->clkdvdr,