bus: ti-sysc: Add support for platform data callbacks

We want to pass the device tree configuration for interconnect target
modules from ti-sysc driver to the existing platform hwmod code.

This allows us to first validate the dts data against the existing
platform data before we start dropping the platform data in favor of
device tree data.

To do this, let's add platform data callbacks for PM runtime functions
to call for the interconnect target modules if platform data is
available.

Note that as ti-sysc driver can rebind, omap_auxdata_lookup and related
functions can no longer be __init.

Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 49 insertions, 0 deletions

diff --git a/include/linux/platform_data/ti-sysc.h b/include/linux/platform_data/ti-sysc.h
index 1be356330b96..4176cb90e195 100644
--- a/include/linux/platform_data/ti-sysc.h
+++ b/include/linux/platform_data/ti-sysc.h
@@ -16,6 +16,10 @@ enum ti_sysc_module_type {
         TI_SYSC_OMAP4_USB_HOST_FS,
 };
 
+struct ti_sysc_cookie {
+        void *data;
+};
+
 /**
  * struct sysc_regbits - TI OCP_SYSCONFIG register field offsets
  * @midle_shift: Offset of the midle bit
@@ -83,4 +87,49 @@ struct sysc_config {
         u32 quirks;
 };
 
+enum sysc_registers {
+        SYSC_REVISION,
+        SYSC_SYSCONFIG,
+        SYSC_SYSSTATUS,
+        SYSC_MAX_REGS,
+};
+
+/**
+ * struct ti_sysc_module_data - ti-sysc to hwmod translation data for a module
+ * @name: legacy "ti,hwmods" module name
+ * @module_pa: physical address of the interconnect target module
+ * @module_size: size of the interconnect target module
+ * @offsets: array of register offsets as listed in enum sysc_registers
+ * @nr_offsets: number of registers
+ * @cap: interconnect target module capabilities
+ * @cfg: interconnect target module configuration
+ *
+ * This data is enough to allocate a new struct omap_hwmod_class_sysconfig
+ * based on device tree data parsed by ti-sysc driver.
+ */
+struct ti_sysc_module_data {
+        const char *name;
+        u64 module_pa;
+        u32 module_size;
+        int *offsets;
+        int nr_offsets;
+        const struct sysc_capabilities *cap;
+        struct sysc_config *cfg;
+};
+
+struct device;
+
+struct ti_sysc_platform_data {
+        struct of_dev_auxdata *auxdata;
+        int (*init_module)(struct device *dev,
+                           const struct ti_sysc_module_data *data,
+                           struct ti_sysc_cookie *cookie);
+        int (*enable_module)(struct device *dev,
+                             const struct ti_sysc_cookie *cookie);
+        int (*idle_module)(struct device *dev,
+                           const struct ti_sysc_cookie *cookie);
+        int (*shutdown_module)(struct device *dev,
+                               const struct ti_sysc_cookie *cookie);
+};
+
 #endif  /* __TI_SYSC_DATA_H__ */