ARM: OMAP2+: PRM: provide generic API for system reset

[karo-tx-linux.git] / arch / arm / mach-omap2 / prm_common.c

diff --git a/arch/arm/mach-omap2/prm_common.c b/arch/arm/mach-omap2/prm_common.c
index 74054b81360079aa835a80a68b0ddc453b393829..779940cb6e5651d4d5c486878b5cbbef060af1dc 100644 (file)
--- a/arch/arm/mach-omap2/prm_common.c
+++ b/arch/arm/mach-omap2/prm_common.c
@@ -422,6 +422,105 @@ void prm_clear_context_loss_flags_old(u8 part, s16 inst, u16 idx)
                          __func__);
 }
 
+/**
+ * omap_prm_assert_hardreset - assert hardreset for an IP block
+ * @shift: register bit shift corresponding to the reset line
+ * @part: PRM partition
+ * @prm_mod: PRM submodule base or instance offset
+ * @offset: register offset
+ *
+ * Asserts a hardware reset line for an IP block.
+ */
+int omap_prm_assert_hardreset(u8 shift, u8 part, s16 prm_mod, u16 offset)
+{
+       if (!prm_ll_data->assert_hardreset) {
+               WARN_ONCE(1, "prm: %s: no mapping function defined\n",
+                         __func__);
+               return -EINVAL;
+       }
+
+       return prm_ll_data->assert_hardreset(shift, part, prm_mod, offset);
+}
+
+/**
+ * omap_prm_deassert_hardreset - deassert hardreset for an IP block
+ * @shift: register bit shift corresponding to the reset line
+ * @st_shift: reset status bit shift corresponding to the reset line
+ * @part: PRM partition
+ * @prm_mod: PRM submodule base or instance offset
+ * @offset: register offset
+ * @st_offset: status register offset
+ *
+ * Deasserts a hardware reset line for an IP block.
+ */
+int omap_prm_deassert_hardreset(u8 shift, u8 st_shift, u8 part, s16 prm_mod,
+                               u16 offset, u16 st_offset)
+{
+       if (!prm_ll_data->deassert_hardreset) {
+               WARN_ONCE(1, "prm: %s: no mapping function defined\n",
+                         __func__);
+               return -EINVAL;
+       }
+
+       return prm_ll_data->deassert_hardreset(shift, st_shift, part, prm_mod,
+                                              offset, st_offset);
+}
+
+/**
+ * omap_prm_is_hardreset_asserted - check the hardreset status for an IP block
+ * @shift: register bit shift corresponding to the reset line
+ * @part: PRM partition
+ * @prm_mod: PRM submodule base or instance offset
+ * @offset: register offset
+ *
+ * Checks if a hardware reset line for an IP block is enabled or not.
+ */
+int omap_prm_is_hardreset_asserted(u8 shift, u8 part, s16 prm_mod, u16 offset)
+{
+       if (!prm_ll_data->is_hardreset_asserted) {
+               WARN_ONCE(1, "prm: %s: no mapping function defined\n",
+                         __func__);
+               return -EINVAL;
+       }
+
+       return prm_ll_data->is_hardreset_asserted(shift, part, prm_mod, offset);
+}
+
+/**
+ * omap_prm_reconfigure_io_chain - clear latches and reconfigure I/O chain
+ *
+ * Clear any previously-latched I/O wakeup events and ensure that the
+ * I/O wakeup gates are aligned with the current mux settings.
+ * Calls SoC specific I/O chain reconfigure function if available,
+ * otherwise does nothing.
+ */
+void omap_prm_reconfigure_io_chain(void)
+{
+       if (!prcm_irq_setup || !prcm_irq_setup->reconfigure_io_chain)
+               return;
+
+       prcm_irq_setup->reconfigure_io_chain();
+}
+
+/**
+ * omap_prm_reset_system - trigger global SW reset
+ *
+ * Triggers SoC specific global warm reset to reboot the device.
+ */
+void omap_prm_reset_system(void)
+{
+       if (!prm_ll_data->reset_system) {
+               WARN_ONCE(1, "prm: %s: no mapping function defined\n",
+                         __func__);
+               return;
+       }
+
+       prm_ll_data->reset_system();
+
+       while (1)
+               cpu_relax();
+}
+
 /**
  * prm_register - register per-SoC low-level data with the PRM
  * @pld: low-level per-SoC OMAP PRM data & function pointers to register
@@ -525,8 +624,6 @@ int __init of_prcm_init(void)
                memmap_index++;
        }
 
-       ti_dt_clockdomains_setup();
-
        return 0;
 }