ARM: OMAP2+: Use signed value for sysc register offsets
We currently don't know if a revision register exists or not. Zero is
often a valid offset for the revision register. As we are still checking
device tree data against platform data, we will get bogus warnings with
correct device tree data because of incomplete platform data.
Let's fix the issue by using signed offsets and tag the revision registers
that don't exist with -ENODEV, and init the missing ones with the correct
revision register offset.
Cc: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index e7d23e20..2ceffd8 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -481,7 +481,7 @@
sysc = oh->class->sysc;
- if (sysc->sysc_flags & SYSS_HAS_RESET_STATUS)
+ if (sysc->sysc_flags & SYSS_HAS_RESET_STATUS && sysc->syss_offs > 0)
omap_test_timeout((omap_hwmod_read(oh, sysc->syss_offs)
& SYSS_RESETDONE_MASK),
MAX_MODULE_SOFTRESET_WAIT, c);
@@ -3171,19 +3171,19 @@
*/
int omap_hwmod_init_reg_offs(struct device *dev,
const struct ti_sysc_module_data *data,
- u32 *rev_offs, u32 *sysc_offs, u32 *syss_offs)
+ s32 *rev_offs, s32 *sysc_offs, s32 *syss_offs)
{
- *rev_offs = 0;
+ *rev_offs = -ENODEV;
*sysc_offs = 0;
*syss_offs = 0;
- if (data->offsets[SYSC_REVISION] > 0)
+ if (data->offsets[SYSC_REVISION] >= 0)
*rev_offs = data->offsets[SYSC_REVISION];
- if (data->offsets[SYSC_SYSCONFIG] > 0)
+ if (data->offsets[SYSC_SYSCONFIG] >= 0)
*sysc_offs = data->offsets[SYSC_SYSCONFIG];
- if (data->offsets[SYSC_SYSSTATUS] > 0)
+ if (data->offsets[SYSC_SYSSTATUS] >= 0)
*syss_offs = data->offsets[SYSC_SYSSTATUS];
return 0;
@@ -3312,8 +3312,8 @@
struct omap_hwmod *oh,
const struct ti_sysc_module_data *data,
struct sysc_regbits *sysc_fields,
- u32 rev_offs, u32 sysc_offs,
- u32 syss_offs, u32 sysc_flags,
+ s32 rev_offs, s32 sysc_offs,
+ s32 syss_offs, u32 sysc_flags,
u32 idlemodes)
{
if (!oh->class->sysc)
@@ -3365,7 +3365,7 @@
int omap_hwmod_allocate_module(struct device *dev, struct omap_hwmod *oh,
const struct ti_sysc_module_data *data,
struct sysc_regbits *sysc_fields,
- u32 rev_offs, u32 sysc_offs, u32 syss_offs,
+ s32 rev_offs, s32 sysc_offs, s32 syss_offs,
u32 sysc_flags, u32 idlemodes)
{
struct omap_hwmod_class_sysconfig *sysc;
@@ -3425,7 +3425,8 @@
{
struct omap_hwmod *oh;
struct sysc_regbits *sysc_fields;
- u32 rev_offs, sysc_offs, syss_offs, sysc_flags, idlemodes;
+ s32 rev_offs, sysc_offs, syss_offs;
+ u32 sysc_flags, idlemodes;
int error;
if (!dev || !data)