OMAP3: PM: Add D2D clocks and auto-idle setup to PRCM init

Add D2D clocks (modem_fck, sad2d_ick, mad2d_ick) to clock framework
and ensure that auto-idle bits are set for these clocks during PRCM
init.

Also add omap3_d2d_idle() function called durint PRCM setup which
ensures D2D pins are MUX'd correctly to enable retention for
standalone (no-modem) devices.

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

1 files changed, 23 insertions, 2 deletions

diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index 54876aca2d45..f72e25465429 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -415,14 +415,32 @@ static void __init omap3_iva_idle(void)
                           OMAP3430_IVA2_MOD, RM_RSTCTRL);
 }
 
-static void __init prcm_setup_regs(void)
+static void __init omap3_d2d_idle(void)
 {
+        u16 mask, padconf;
+
+        /* In a stand alone OMAP3430 where there is not a stacked
+         * modem for the D2D Idle Ack and D2D MStandby must be pulled
+         * high. S CONTROL_PADCONF_SAD2D_IDLEACK and
+         * CONTROL_PADCONF_SAD2D_MSTDBY to have a pull up. */
+        mask = (1 << 4) | (1 << 3); /* pull-up, enabled */
+        padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_MSTANDBY);
+        padconf |= mask;
+        omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_MSTANDBY);
+
+        padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_IDLEACK);
+        padconf |= mask;
+        omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_IDLEACK);
+
         /* 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);
+}
 
+static void __init prcm_setup_regs(void)
+{
         /* XXX Reset all wkdeps. This should be done when initializing
          * powerdomains */
         prm_write_mod_reg(0, OMAP3430_IVA2_MOD, PM_WKDEP);
@@ -442,6 +460,7 @@ static void __init prcm_setup_regs(void)
          * Note that in the long run this should be done by clockfw
          */
         cm_write_mod_reg(
+                OMAP3430_AUTO_MODEM |
                 OMAP3430ES2_AUTO_MMC3 |
                 OMAP3430ES2_AUTO_ICR |
                 OMAP3430_AUTO_AES2 |
@@ -469,7 +488,7 @@ static void __init prcm_setup_regs(void)
                 OMAP3430_AUTO_OMAPCTRL |
                 OMAP3430ES1_AUTO_FSHOSTUSB |
                 OMAP3430_AUTO_HSOTGUSB |
-                OMAP3430ES1_AUTO_D2D | /* This is es1 only */
+                OMAP3430_AUTO_SAD2D |
                 OMAP3430_AUTO_SSI,
                 CORE_MOD, CM_AUTOIDLE1);
 
@@ -483,6 +502,7 @@ static void __init prcm_setup_regs(void)
 
         if (omap_rev() > OMAP3430_REV_ES1_0) {
                 cm_write_mod_reg(
+                        OMAP3430_AUTO_MAD2D |
                         OMAP3430ES2_AUTO_USBTLL,
                         CORE_MOD, CM_AUTOIDLE3);
         }
@@ -576,6 +596,7 @@ static void __init prcm_setup_regs(void)
                           OCP_MOD, OMAP3_PRM_IRQENABLE_MPU_OFFSET);
 
         omap3_iva_idle();
+        omap3_d2d_idle();
 }
 
 static int __init pwrdms_setup(struct powerdomain *pwrdm)