OMAP3: PM: Ensure modem is reset during PRCM init

Rogue bootloaders may enable the modem and thus keep the
D2D power- and clock-domains from going into retention.
Reset modem on boot to be sure it is in known state.
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

arch/arm/mach-omap2/pm34xx.c

@@ -424,6 +424,12 @@ static void __init omap3_iva_idle(void)
 
 static void __init prcm_setup_regs(void)
 {
+	/* reset modem */
+	prm_write_mod_reg(OMAP3430_RM_RSTCTRL_CORE_MODEM_SW_RSTPWRON |
+			  OMAP3430_RM_RSTCTRL_CORE_MODEM_SW_RST,
+			  CORE_MOD, RM_RSTCTRL);
+	prm_write_mod_reg(0, CORE_MOD, RM_RSTCTRL);
+
 	/* XXX Reset all wkdeps. This should be done when initializing
 	 * powerdomains */
 	prm_write_mod_reg(0, OMAP3430_IVA2_MOD, PM_WKDEP);