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spi: spi-fsl-dspi: Use max_native_cs instead of num_chipselect to set SPI_MCR 

If cs-gpios property is used in devicetree then ctlr->num_chipselect value
may be changed by spi_get_gpio_descs().
So use ctlr->max_native_cs instead of ctlr->num_chipselect to set SPI_MCR

Fixes: 4fcc7c2292 (spi: spi-fsl-dspi: Don't access reserved fields in SPI_MCR)
Signed-off-by: Maxim Kochetkov <fido_max@inbox.ru>
Link: https://lore.kernel.org/r/20201201085916.63543-1-fido_max@inbox.ru
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Maxim Kochetkov 2020-12-01 11:59:16 +03:00 committed by Mark Brown
parent 122541f2b1
commit 2c2b3ad2c4
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GPG Key ID: 24D68B725D5487D0
1 changed files with 3 additions and 3 deletions
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6
drivers/spi/spi-fsl-dspi.c
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@ -1165,7 +1165,7 @@ static int dspi_init(struct fsl_dspi *dspi)
unsigned int mcr;
/* Set idle states for all chip select signals to high */
mcr = SPI_MCR_PCSIS(GENMASK(dspi->ctlr->num_chipselect - 1, 0));
mcr = SPI_MCR_PCSIS(GENMASK(dspi->ctlr->max_native_cs - 1, 0));
if (dspi->devtype_data->trans_mode == DSPI_XSPI_MODE)
mcr |= SPI_MCR_XSPI;
@ -1250,7 +1250,7 @@ static int dspi_probe(struct platform_device *pdev)
pdata = dev_get_platdata(&pdev->dev);
if (pdata) {
ctlr->num_chipselect = pdata->cs_num;
ctlr->num_chipselect = ctlr->max_native_cs = pdata->cs_num;
ctlr->bus_num = pdata->bus_num;
/* Only Coldfire uses platform data */
@ -1263,7 +1263,7 @@ static int dspi_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "can't get spi-num-chipselects\n");
goto out_ctlr_put;
}
ctlr->num_chipselect = cs_num;
ctlr->num_chipselect = ctlr->max_native_cs = cs_num;
of_property_read_u32(np, "bus-num", &bus_num);
ctlr->bus_num = bus_num;