From: Kevin Hilman <khilman@deeprootsystems.com>
Date: Wed, 26 Nov 2008 05:46:55 +0000 (-0800)
Subject: OMAP3: PM: Ensure modem is reset during PRCM init
X-Git-Tag: v2.6.28-omap1~13
X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?p=linux-2.6-omap-h63xx.git;a=commitdiff_plain;h=4a3b9a7d4cedf2d3d4522fec494b9eb60c971886

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>
---

diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index 8b4b8623f8d..1d54e96f16d 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/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);