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Subject[PATCH 06/12] spi: spi-fsl-dspi: Fixup regmap configuration
Date
From: Esben Haabendal <eha@deif.com>

Mark volatile registers to avoid caching bugs.

Note: SPI_MCR is marked volatile because of CLR_TXF and CLR_RXF bits.

Signed-off-by: Esben Haabendal <eha@deif.com>
Cc: Martin Hundebøll <martin@geanix.com>
---
drivers/spi/spi-fsl-dspi.c | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c
index df07dd4722fb..5c5905b6509f 100644
--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -862,11 +862,23 @@ static int dspi_resume(struct device *dev)

static SIMPLE_DEV_PM_OPS(dspi_pm, dspi_suspend, dspi_resume);

+static const struct regmap_range dspi_volatile_ranges[] = {
+ regmap_reg_range(SPI_MCR, SPI_TCR),
+ regmap_reg_range(SPI_SR, SPI_SR),
+ regmap_reg_range(SPI_PUSHR, SPI_RXFR3),
+};
+
+static const struct regmap_access_table dspi_volatile_table = {
+ .yes_ranges = dspi_volatile_ranges,
+ .n_yes_ranges = ARRAY_SIZE(dspi_volatile_ranges),
+};
+
static const struct regmap_config dspi_regmap_config = {
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
.max_register = 0x88,
+ .volatile_table = &dspi_volatile_table,
};

static void dspi_init(struct fsl_dspi *dspi)
--
2.17.1
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