stm32_spi_transfer_one() can transfer no more than SPI_CR2_TSIZE (64K - 1),
while e.g. imd tends to read more than (64K - 1) from SPI flash:
barebox:/ imd /dev/m25p0
imd: error 90
Define spi_controller_mem_ops::exec_op for the SPI controller to fix
this.
Signed-off-by: Antony Pavlov <antonynpavlov@xxxxxxxxx>
Signed-off-by: Ahmad Fatoum <ahmad@xxxxxx>
---
drivers/spi/stm32_spi.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/spi/stm32_spi.c b/drivers/spi/stm32_spi.c
index 0cb04a968c8a..d38207edac5f 100644
--- a/drivers/spi/stm32_spi.c
+++ b/drivers/spi/stm32_spi.c
@@ -11,6 +11,7 @@
#include <init.h>
#include <errno.h>
#include <linux/reset.h>
+#include <linux/spi/spi-mem.h>
#include <spi/spi.h>
#include <linux/bitops.h>
#include <clock.h>
@@ -474,6 +475,24 @@ out:
return ret;
}
+static int stm32_spi_adjust_op_size(struct spi_mem *mem, struct spi_mem_op *op)
+{
+ if (op->data.nbytes > SPI_CR2_TSIZE)
+ op->data.nbytes = SPI_CR2_TSIZE;
+
+ return 0;
+}
+
+static int stm32_spi_exec_op(struct spi_mem *mem, const struct spi_mem_op *op)
+{
+ return -ENOTSUPP;
+}
+
+static const struct spi_controller_mem_ops stm32_spi_mem_ops = {
+ .adjust_op_size = stm32_spi_adjust_op_size,
+ .exec_op = stm32_spi_exec_op,
+};
+
static int stm32_spi_get_fifo_size(struct stm32_spi_priv *priv)
{
u32 count = 0;
@@ -522,6 +541,7 @@ static int stm32_spi_probe(struct device_d *dev)
master->setup = stm32_spi_setup;
master->transfer = stm32_spi_transfer;
+ master->mem_ops = stm32_spi_mem_ops;
master->bus_num = -1;
stm32_spi_dt_probe(priv);
--
2.34.1
