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Date: Fri, 25 Nov 2022 14:20:26 +0000
From: Charles Keepax <ckeepax@...nsource.cirrus.com>
To: <vkoul@...nel.org>
CC: <yung-chuan.liao@...ux.intel.com>,
<pierre-louis.bossart@...ux.intel.com>, <sanyog.r.kale@...el.com>,
<alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
<patches@...nsource.cirrus.com>
Subject: [PATCH v4 2/4] soundwire: Provide build stubs for common functions
Provide stub functions when CONFIG_SOUNDWIRE is not set for functions
that are quite likely to be used from common code on devices supporting
multiple control buses.
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Signed-off-by: Charles Keepax <ckeepax@...nsource.cirrus.com>
---
Changes since v3:
- Return error code and add WARN_ONCE in build stubs. Note I returned
EINVAL rather than the discussed ENOSYS since it turns out checkpatch
informs me I really shouldn't be returning ENOSYS :-)
Thanks,
Charles
include/linux/soundwire/sdw.h | 105 ++++++++++++++++++++++++++++++----
1 file changed, 95 insertions(+), 10 deletions(-)
diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h
index 902ed46f76c80..132a0ee97b804 100644
--- a/include/linux/soundwire/sdw.h
+++ b/include/linux/soundwire/sdw.h
@@ -4,6 +4,7 @@
#ifndef __SOUNDWIRE_H
#define __SOUNDWIRE_H
+#include <linux/bug.h>
#include <linux/mod_devicetable.h>
#include <linux/bitfield.h>
@@ -1021,15 +1022,8 @@ int sdw_stream_add_master(struct sdw_bus *bus,
struct sdw_port_config *port_config,
unsigned int num_ports,
struct sdw_stream_runtime *stream);
-int sdw_stream_add_slave(struct sdw_slave *slave,
- struct sdw_stream_config *stream_config,
- struct sdw_port_config *port_config,
- unsigned int num_ports,
- struct sdw_stream_runtime *stream);
int sdw_stream_remove_master(struct sdw_bus *bus,
struct sdw_stream_runtime *stream);
-int sdw_stream_remove_slave(struct sdw_slave *slave,
- struct sdw_stream_runtime *stream);
int sdw_startup_stream(void *sdw_substream);
int sdw_prepare_stream(struct sdw_stream_runtime *stream);
int sdw_enable_stream(struct sdw_stream_runtime *stream);
@@ -1040,8 +1034,20 @@ int sdw_bus_prep_clk_stop(struct sdw_bus *bus);
int sdw_bus_clk_stop(struct sdw_bus *bus);
int sdw_bus_exit_clk_stop(struct sdw_bus *bus);
-/* messaging and data APIs */
+int sdw_compare_devid(struct sdw_slave *slave, struct sdw_slave_id id);
+void sdw_extract_slave_id(struct sdw_bus *bus, u64 addr, struct sdw_slave_id *id);
+#if IS_ENABLED(CONFIG_SOUNDWIRE)
+
+int sdw_stream_add_slave(struct sdw_slave *slave,
+ struct sdw_stream_config *stream_config,
+ struct sdw_port_config *port_config,
+ unsigned int num_ports,
+ struct sdw_stream_runtime *stream);
+int sdw_stream_remove_slave(struct sdw_slave *slave,
+ struct sdw_stream_runtime *stream);
+
+/* messaging and data APIs */
int sdw_read(struct sdw_slave *slave, u32 addr);
int sdw_write(struct sdw_slave *slave, u32 addr, u8 value);
int sdw_write_no_pm(struct sdw_slave *slave, u32 addr, u8 value);
@@ -1053,7 +1059,86 @@ int sdw_nwrite_no_pm(struct sdw_slave *slave, u32 addr, size_t count, const u8 *
int sdw_update(struct sdw_slave *slave, u32 addr, u8 mask, u8 val);
int sdw_update_no_pm(struct sdw_slave *slave, u32 addr, u8 mask, u8 val);
-int sdw_compare_devid(struct sdw_slave *slave, struct sdw_slave_id id);
-void sdw_extract_slave_id(struct sdw_bus *bus, u64 addr, struct sdw_slave_id *id);
+#else
+
+static inline int sdw_stream_add_slave(struct sdw_slave *slave,
+ struct sdw_stream_config *stream_config,
+ struct sdw_port_config *port_config,
+ unsigned int num_ports,
+ struct sdw_stream_runtime *stream)
+{
+ WARN_ONCE(1, "SoundWire API is disabled");
+ return -EINVAL;
+}
+
+static inline int sdw_stream_remove_slave(struct sdw_slave *slave,
+ struct sdw_stream_runtime *stream)
+{
+ WARN_ONCE(1, "SoundWire API is disabled");
+ return -EINVAL;
+}
+
+/* messaging and data APIs */
+static inline int sdw_read(struct sdw_slave *slave, u32 addr)
+{
+ WARN_ONCE(1, "SoundWire API is disabled");
+ return -EINVAL;
+}
+
+static inline int sdw_write(struct sdw_slave *slave, u32 addr, u8 value)
+{
+ WARN_ONCE(1, "SoundWire API is disabled");
+ return -EINVAL;
+}
+
+static inline int sdw_write_no_pm(struct sdw_slave *slave, u32 addr, u8 value)
+{
+ WARN_ONCE(1, "SoundWire API is disabled");
+ return -EINVAL;
+}
+
+static inline int sdw_read_no_pm(struct sdw_slave *slave, u32 addr)
+{
+ WARN_ONCE(1, "SoundWire API is disabled");
+ return -EINVAL;
+}
+
+static inline int sdw_nread(struct sdw_slave *slave, u32 addr, size_t count, u8 *val)
+{
+ WARN_ONCE(1, "SoundWire API is disabled");
+ return -EINVAL;
+}
+
+static inline int sdw_nread_no_pm(struct sdw_slave *slave, u32 addr, size_t count, u8 *val)
+{
+ WARN_ONCE(1, "SoundWire API is disabled");
+ return -EINVAL;
+}
+
+static inline int sdw_nwrite(struct sdw_slave *slave, u32 addr, size_t count, const u8 *val)
+{
+ WARN_ONCE(1, "SoundWire API is disabled");
+ return -EINVAL;
+}
+
+static inline int sdw_nwrite_no_pm(struct sdw_slave *slave, u32 addr, size_t count, const u8 *val)
+{
+ WARN_ONCE(1, "SoundWire API is disabled");
+ return -EINVAL;
+}
+
+static inline int sdw_update(struct sdw_slave *slave, u32 addr, u8 mask, u8 val)
+{
+ WARN_ONCE(1, "SoundWire API is disabled");
+ return -EINVAL;
+}
+
+static inline int sdw_update_no_pm(struct sdw_slave *slave, u32 addr, u8 mask, u8 val)
+{
+ WARN_ONCE(1, "SoundWire API is disabled");
+ return -EINVAL;
+}
+
+#endif /* CONFIG_SOUNDWIRE */
#endif /* __SOUNDWIRE_H */
--
2.30.2
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