ARM: OMAP4+: prminst: provide function to find prm_dev instance offset
PRM device instance can vary depending on SoC. We already handle the
same during reset of the device, However, this is also needed
for other logic instances. So, first abstract this out to a generic
function.
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
diff --git a/arch/arm/mach-omap2/prminst44xx.c b/arch/arm/mach-omap2/prminst44xx.c
index 69f0dd0..225e025 100644
--- a/arch/arm/mach-omap2/prminst44xx.c
+++ b/arch/arm/mach-omap2/prminst44xx.c
@@ -31,6 +31,8 @@
static void __iomem *_prm_bases[OMAP4_MAX_PRCM_PARTITIONS];
+static s32 prm_dev_inst = PRM_INSTANCE_UNKNOWN;
+
/**
* omap_prm_base_init - Populates the prm partitions
*
@@ -43,6 +45,24 @@
_prm_bases[OMAP4430_PRCM_MPU_PARTITION] = prcm_mpu_base;
}
+s32 omap4_prmst_get_prm_dev_inst(void)
+{
+ if (prm_dev_inst != PRM_INSTANCE_UNKNOWN)
+ return prm_dev_inst;
+
+ /* This cannot be done way early at boot.. as things are not setup */
+ if (cpu_is_omap44xx())
+ prm_dev_inst = OMAP4430_PRM_DEVICE_INST;
+ else if (soc_is_omap54xx())
+ prm_dev_inst = OMAP54XX_PRM_DEVICE_INST;
+ else if (soc_is_dra7xx())
+ prm_dev_inst = DRA7XX_PRM_DEVICE_INST;
+ else if (soc_is_am43xx())
+ prm_dev_inst = AM43XX_PRM_DEVICE_INST;
+
+ return prm_dev_inst;
+}
+
/* Read a register in a PRM instance */
u32 omap4_prminst_read_inst_reg(u8 part, s16 inst, u16 idx)
{
@@ -169,28 +189,18 @@
void omap4_prminst_global_warm_sw_reset(void)
{
u32 v;
- s16 dev_inst;
+ s32 inst = omap4_prmst_get_prm_dev_inst();
- if (cpu_is_omap44xx())
- dev_inst = OMAP4430_PRM_DEVICE_INST;
- else if (soc_is_omap54xx())
- dev_inst = OMAP54XX_PRM_DEVICE_INST;
- else if (soc_is_dra7xx())
- dev_inst = DRA7XX_PRM_DEVICE_INST;
- else if (soc_is_am43xx())
- dev_inst = AM43XX_PRM_DEVICE_INST;
- else
+ if (inst == PRM_INSTANCE_UNKNOWN)
return;
- v = omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION, dev_inst,
+ v = omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION, inst,
OMAP4_PRM_RSTCTRL_OFFSET);
v |= OMAP4430_RST_GLOBAL_WARM_SW_MASK;
omap4_prminst_write_inst_reg(v, OMAP4430_PRM_PARTITION,
- dev_inst,
- OMAP4_PRM_RSTCTRL_OFFSET);
+ inst, OMAP4_PRM_RSTCTRL_OFFSET);
/* OCP barrier */
v = omap4_prminst_read_inst_reg(OMAP4430_PRM_PARTITION,
- dev_inst,
- OMAP4_PRM_RSTCTRL_OFFSET);
+ inst, OMAP4_PRM_RSTCTRL_OFFSET);
}