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Subject[PATCH 1/9] spi: atmel-quadspi: optimize qspi init
Date
From: Tudor Ambarus <tudor.ambarus@microchip.com>

Set the QSPI controller in Serial Memory Mode at init and not
at each exec_op() call.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
---
drivers/spi/atmel-quadspi.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/atmel-quadspi.c b/drivers/spi/atmel-quadspi.c
index ddc712410812..f79b17792a11 100644
--- a/drivers/spi/atmel-quadspi.c
+++ b/drivers/spi/atmel-quadspi.c
@@ -238,8 +238,6 @@ static int atmel_qspi_exec_op(struct spi_mem *mem, const struct spi_mem_op *op)
icr = QSPI_ICR_INST(op->cmd.opcode);
ifr = QSPI_IFR_INSTEN;

- qspi_writel(aq, QSPI_MR, QSPI_MR_SMM);
-
mode = find_mode(op);
if (mode < 0)
return -ENOTSUPP;
@@ -381,6 +379,9 @@ static int atmel_qspi_init(struct atmel_qspi *aq)
/* Reset the QSPI controller */
qspi_writel(aq, QSPI_CR, QSPI_CR_SWRST);

+ /* Set the QSPI controller in Serial Memory Mode */
+ qspi_writel(aq, QSPI_MR, QSPI_MR_SMM);
+
/* Enable the QSPI controller */
qspi_writel(aq, QSPI_CR, QSPI_CR_QSPIEN);

--
2.9.5
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