net: ipa: define clock and interconnect data

Define a new type of configuration data, used to initialize the
IPA core clock and interconnects.  This is the first of three
patches, and defines the data types and interface but doesn't
yet use them.

Switch the return value if there is no matching configuration data
to ENODEV instead of ENOTSUPP (to avoid using the nonstandard errno).

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 30 insertions, 1 deletions

diff --git a/drivers/net/ipa/ipa_data.h b/drivers/net/ipa/ipa_data.h
index 83c4b78373ef..0ed5ffe2b8da 100644
--- a/drivers/net/ipa/ipa_data.h
+++ b/drivers/net/ipa/ipa_data.h
@@ -241,7 +241,7 @@ struct ipa_resource_data {
 };
 
 /**
- * struct ipa_mem - description of IPA memory regions
+ * struct ipa_mem_data - description of IPA memory regions
  * @local_count:	number of regions defined in the local[] array
  * @local:		array of IPA-local memory region descriptors
  * @imem_addr:		physical address of IPA region within IMEM
@@ -258,6 +258,34 @@ struct ipa_mem_data {
 	u32 smem_size;
 };
 
+/** enum ipa_interconnect_id - IPA interconnect identifier */
+enum ipa_interconnect_id {
+	IPA_INTERCONNECT_MEMORY,
+	IPA_INTERCONNECT_IMEM,
+	IPA_INTERCONNECT_CONFIG,
+	IPA_INTERCONNECT_COUNT,		/* Last; not an interconnect */
+};
+
+/**
+ * struct ipa_interconnect_data - description of IPA interconnect rates
+ * @peak_rate:		Peak interconnect bandwidth (in 1000 byte/sec units)
+ * @average_rate:	Average interconnect bandwidth (in 1000 byte/sec units)
+ */
+struct ipa_interconnect_data {
+	u32 peak_rate;
+	u32 average_rate;
+};
+
+/**
+ * struct ipa_clock_data - description of IPA clock and interconnect rates
+ * @core_clock_rate:	Core clock rate (Hz)
+ * @interconnect:	Array of interconnect bandwidth parameters
+ */
+struct ipa_clock_data {
+	u32 core_clock_rate;
+	struct ipa_interconnect_data interconnect[IPA_INTERCONNECT_COUNT];
+};
+
 /**
  * struct ipa_data - combined IPA/GSI configuration data
  * @version:		IPA hardware version
@@ -273,6 +301,7 @@ struct ipa_data {
 	const struct ipa_gsi_endpoint_data *endpoint_data;
 	const struct ipa_resource_data *resource_data;
 	const struct ipa_mem_data *mem_data;
+	const struct ipa_clock_data *clock_data;
 };
 
 extern const struct ipa_data ipa_data_sdm845;