Replace ternary (condition ? "enable" : "disable") syntax with helpers
from string_choices.h because:
1. Simple function call with one argument is easier to read. Ternary
operator has three arguments and with wrapping might lead to quite
long code.
2. Is slightly shorter thus also easier to read.
3. It brings uniformity in the text - same string.
4. Allows deduping by the linker, which results in a smaller binary
file.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20250114200726.969501-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
We have an existing debugfs files to read standard registers
(DP0/SCP/DPn).
This patch provides a more generic interface to ANY set of read/write
contiguous registers in a peripheral device. In follow-up patches,
this interface will be extended to use BRA transfers.
The sequence is to use the following files added under the existing
debugsfs directory for each peripheral device:
command (write 0, read 1)
num_bytes
start_address
firmware_file (only for writes)
read_buffer (only for reads)
Example for a read command - this checks the 6 bytes used for
enumeration.
cd /sys/kernel/debug/soundwire/master-0-0/sdw\:0\:025d\:0711\:01/
echo 1 > command
echo 6 > num_bytes
echo 0x50 > start_address
echo 1 > go
cat read_buffer
address 0x50 val 0x30
address 0x51 val 0x02
address 0x52 val 0x5d
address 0x53 val 0x07
address 0x54 val 0x11
address 0x55 val 0x01
Example with a 2-byte firmware file written in DP0 address 0x22
od -x /lib/firmware/test_firmware
0000000 0a37
0000002
cd /sys/kernel/debug/soundwire/master-0-0/sdw\:0\:025d\:0711\:01/
echo 0 > command
echo 2 > num_bytes
echo 0x22 > start_address
echo "test_firmware" > firmware_file
echo 1 > go
cd /sys/kernel/debug/soundwire/master-0-0/sdw\:0\:025d\:0711\:01/
echo 1 > command
echo 2 > num_bytes
echo 0x22 > start_address
echo 1 > go
cat read_buffer
address 0x22 val 0x37
address 0x23 val 0x0a
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20240603065841.4860-1-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
link_id can be zero and if we have multiple controller instances
in a system like Qualcomm debugfs will end-up with duplicate namespace
resulting in incorrect debugfs entries.
Using bus-id and link-id combination should give a unique debugfs directory
entry and should fix below warning too.
"debugfs: Directory 'master-0' with parent 'soundwire' already present!"
Fixes: bf03473d5b ("soundwire: add debugfs support")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210907105332.1257-1-srinivas.kandagatla@linaro.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
