linux-imx
Public
Source
committed 8bc85a8714350
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"if set enable loopback mode, where the rx_buf " \51
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"is checked to match tx_buf after the spi_message " \52
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"is executed");53
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static int loop_req;55
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module_param(loop_req, int, 0);56
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MODULE_PARM_DESC(loop_req,57
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"if set controller will be asked to enable test loop mode. " \58
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"If controller supported it, MISO and MOSI will be connected");59
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static int no_cs;61
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module_param(no_cs, int, 0);62
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MODULE_PARM_DESC(no_cs,63
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"if set Chip Select (CS) will not be used");64
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/* run only a specific test */61
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static int run_only_test = -1;62
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module_param(run_only_test, int, 0);63
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MODULE_PARM_DESC(run_only_test,64
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"only run the test with this number (0-based !)");65
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/* use vmalloc'ed buffers */67
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static int use_vmalloc;68
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module_param(use_vmalloc, int, 0644);69
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MODULE_PARM_DESC(use_vmalloc,312
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},313
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},314
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{ /* end of tests sequence */ }316
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};317
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static int spi_loopback_test_probe(struct spi_device *spi)319
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{320
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int ret;321
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if (loop_req) {323
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spi->mode = SPI_LOOP | spi->mode;327
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if (loop_req || no_cs) {328
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spi->mode |= loop_req ? SPI_LOOP : 0;329
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spi->mode |= no_cs ? SPI_NO_CS : 0;324
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ret = spi_setup(spi);325
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if (ret) {326
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dev_err(&spi->dev, "SPI setup with SPI_LOOP failed (%d)\n",332
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dev_err(&spi->dev, "SPI setup with SPI_LOOP or SPI_NO_CS failed (%d)\n",327
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ret);328
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return ret;329
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}330
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}331
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dev_info(&spi->dev, "Executing spi-loopback-tests\n");333
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ret = spi_test_run_tests(spi, spi_tests);335
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dev_info(&spi->dev, "Finished spi-loopback-tests with return: %i\n",