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Subject[PATCH v4 3/3] spi: dw: Add support for master mode selection for DWC SSI controller
Date
From: Nandhini Srikandan <nandhini.srikandan@intel.com>

Add support to select the controller mode as master mode by setting
Bit 31 of CTRLR0 register. This feature is supported for controller
versions above v1.02.

Signed-off-by: Nandhini Srikandan <nandhini.srikandan@intel.com>
---
drivers/spi/spi-dw-core.c | 4 ++--
drivers/spi/spi-dw.h | 7 +++----
2 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/spi/spi-dw-core.c b/drivers/spi/spi-dw-core.c
index ecea471ff42c..68bfdf2c4dc7 100644
--- a/drivers/spi/spi-dw-core.c
+++ b/drivers/spi/spi-dw-core.c
@@ -307,8 +307,8 @@ static u32 dw_spi_prepare_cr0(struct dw_spi *dws, struct spi_device *spi)
if (spi->mode & SPI_LOOP)
cr0 |= DW_HSSI_CTRLR0_SRL;

- if (dws->caps & DW_SPI_CAP_KEEMBAY_MST)
- cr0 |= DW_HSSI_CTRLR0_KEEMBAY_MST;
+ /* CTRLR0[31] MST */
+ cr0 |= DW_HSSI_CTRLR0_MST;
}

return cr0;
diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h
index d5ee5130601e..2583b7314c41 100644
--- a/drivers/spi/spi-dw.h
+++ b/drivers/spi/spi-dw.h
@@ -23,7 +23,7 @@
((_dws)->ip == DW_ ## _ip ## _ID)

#define __dw_spi_ver_cmp(_dws, _ip, _ver, _op) \
- (dw_spi_ip_is(_dws, _ip) && (_dws)->ver _op DW_ ## _ip ## _ver)
+ (dw_spi_ip_is(_dws, _ip) && (_dws)->ver _op DW_ ## _ip ## _ ## _ver)

#define dw_spi_ver_is(_dws, _ip, _ver) __dw_spi_ver_cmp(_dws, _ip, _ver, ==)

@@ -31,8 +31,7 @@

/* DW SPI controller capabilities */
#define DW_SPI_CAP_CS_OVERRIDE BIT(0)
-#define DW_SPI_CAP_KEEMBAY_MST BIT(1)
-#define DW_SPI_CAP_DFS32 BIT(2)
+#define DW_SPI_CAP_DFS32 BIT(1)

/* Register offsets (Generic for both DWC APB SSI and DWC SSI IP-cores) */
#define DW_SPI_CTRLR0 0x00
@@ -100,7 +99,7 @@
* 0: SSI is slave
* 1: SSI is master
*/
-#define DW_HSSI_CTRLR0_KEEMBAY_MST BIT(31)
+#define DW_HSSI_CTRLR0_MST BIT(31)

/* Bit fields in CTRLR1 */
#define DW_SPI_NDF_MASK GENMASK(15, 0)
--
2.17.1
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