powerpc/5200: tighten up ac97 reset timing

[sfrench/cifs-2.6.git] / arch / powerpc / platforms / 52xx / mpc52xx_common.c

diff --git a/arch/powerpc/platforms/52xx/mpc52xx_common.c b/arch/powerpc/platforms/52xx/mpc52xx_common.c
index 6e905314ad5d66035daf38a514adbfaa2aa60dfa..41f3a7eda1def670c1c12864de488788fc27ff98 100644 (file)
--- a/arch/powerpc/platforms/52xx/mpc52xx_common.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_common.c
@@ -325,12 +325,16 @@ int mpc5200_psc_ac97_gpio_reset(int psc_number)
        clrbits32(&simple_gpio->simple_dvo, sync | out);
        clrbits8(&wkup_gpio->wkup_dvo, reset);
 
-       /* wait at lease 1 us */
-       udelay(2);
+       /* wait for 1 us */
+       udelay(1);
 
        /* Deassert reset */
        setbits8(&wkup_gpio->wkup_dvo, reset);
 
+       /* wait at least 200ns */
+       /* 7 ~= (200ns * timebase) / ns2sec */
+       __delay(7);
+
        /* Restore pin-muxing */
        out_be32(&simple_gpio->port_config, mux);