ARM: OMAP: AM3517/3505: fix crash on boot due to incorrect voltagedom…

…ain data

AM3517/3505 chips don't have voltage controller and voltage processor
IP blocks.  Trying to use OMAP34xx/36xx voltage domain data on these
chips causes a crash during boot:

  omap_vc_init_channel: PMIC info requried to configure vc forvdd_core not populated.Hence cannot initialize vc
  Unable to handle kernel NULL pointer dereference at virtual address 00000025
  pgd = c0004000
  [00000025] *pgd=00000000
  Internal error: Oops: 5 [raspberrypi#1] SMP
  Modules linked in:
  CPU: 0    Tainted: G        W     (3.2.0-rc5-00006-g402ecf4 raspberrypi#304)
  PC is at omap_vp_init+0x5c/0x14c
  LR is at omap_vp_init+0x54/0x14c

Fix this by using very minimal voltage domain definitions for AM3517/3505.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Igor Grinberg <grinberg@compulab.co.il>
Cc: Kevin Hilman <khilman@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/voltagedomains3xxx_data.c

@@ -31,6 +31,14 @@
  * VDD data
  */
 
+/* OMAP3-common voltagedomain data */
+
+static struct voltagedomain omap3_voltdm_wkup = {
+ .name = "wakeup",
+};
+
+/* 34xx/36xx voltagedomain data */
+
 static const struct omap_vfsm_instance omap3_vdd1_vfsm = {
  .voltsetup_reg = OMAP3_PRM_VOLTSETUP1_OFFSET,
  .voltsetup_mask = OMAP3430_SETUP_TIME1_MASK,
@@ -63,22 +71,37 @@ static struct voltagedomain omap3_voltdm_core = {
  .vp = &omap3_vp_core,
 };
 
-static struct voltagedomain omap3_voltdm_wkup = {
- .name = "wakeup",
-};
-
 static struct voltagedomain *voltagedomains_omap3[] __initdata = {
  &omap3_voltdm_mpu,
  &omap3_voltdm_core,
  &omap3_voltdm_wkup,
  NULL,
 };
 
+/* AM35xx voltagedomain data */
+
+static struct voltagedomain am35xx_voltdm_mpu = {
+ .name = "mpu_iva",
+};
+
+static struct voltagedomain am35xx_voltdm_core = {
+ .name = "core",
+};
+
+static struct voltagedomain *voltagedomains_am35xx[] __initdata = {
+ &am35xx_voltdm_mpu,
+ &am35xx_voltdm_core,
+ &omap3_voltdm_wkup,
+ NULL,
+};
+
+
 static const char *sys_clk_name __initdata = "sys_ck";
 
 void __init omap3xxx_voltagedomains_init(void)
 {
  struct voltagedomain *voltdm;
+ struct voltagedomain **voltdms;
  int i;
 
  /*
@@ -93,8 +116,13 @@ void __init omap3xxx_voltagedomains_init(void)
  omap3_voltdm_core.volt_data = omap34xx_vddcore_volt_data;
  }
 
- for (i = 0; voltdm = voltagedomains_omap3[i], voltdm; i++)
+ if (cpu_is_omap3517() || cpu_is_omap3505())
+ voltdms = voltagedomains_am35xx;
+ else
+ voltdms = voltagedomains_omap3;
+
+ for (i = 0; voltdm = voltdms[i], voltdm; i++)
  voltdm->sys_clk.name = sys_clk_name;
 
- voltdm_init(voltagedomains_omap3);
+ voltdm_init(voltdms);
 };