[PATCH v2 1/1] spi: spi-loopback-test: Add module param for iteration length

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SPI test framework is designed to run each test case for
a list of lengths.
Introduce a module parameter to limit the iterations
to a single value among the list of lengths.

Signed-off-by: Rohit Ner <rohitner@xxxxxxxxxx>
---
 drivers/spi/spi-loopback-test.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/spi/spi-loopback-test.c b/drivers/spi/spi-loopback-test.c
index 313106eb8d40..675a73cf1579 100644
--- a/drivers/spi/spi-loopback-test.c
+++ b/drivers/spi/spi-loopback-test.c
@@ -53,6 +53,12 @@ module_param(no_cs, int, 0);
 MODULE_PARM_DESC(no_cs,
 		 "if set Chip Select (CS) will not be used");
 
+/* run tests only for a specific length */
+static int run_only_iter_len = -1;
+module_param(run_only_iter_len, int, 0);
+MODULE_PARM_DESC(run_only_iter_len,
+		 "only run tests for a length of this number in iterate_len list");
+
 /* run only a specific test */
 static int run_only_test = -1;
 module_param(run_only_test, int, 0);
@@ -1033,6 +1039,8 @@ int spi_test_run_test(struct spi_device *spi, const struct spi_test *test,
 
 	for (idx_len = 0; idx_len < SPI_TEST_MAX_ITERATE &&
 	     (len = test->iterate_len[idx_len]) != -1; idx_len++) {
+		if ((run_only_iter_len > -1) && len != run_only_iter_len)
+			continue;
 		FOR_EACH_ALIGNMENT(tx_align) {
 			FOR_EACH_ALIGNMENT(rx_align) {
 				/* and run the iteration */
-- 
2.40.0.577.gac1e443424-goog




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