[PATCH v3 3/5] spi: dw: Add support for master mode selection for DWC SSI controller

From: nandhini.srikandan@intel.com
To: fancer.lancer@gmail.com, broonie@kernel.org, robh+dt@kernel.org,
	linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: devicetree@vger.kernel.org, mgross@linux.intel.com,
	kris.pan@intel.com, kenchappa.demakkanavar@intel.com,
	furong.zhou@intel.com, mallikarjunappa.sangannavar@intel.com,
	mahesh.r.vaidya@intel.com, nandhini.srikandan@intel.com,
	rashmi.a@intel.com
Subject: [PATCH v3 3/5] spi: dw: Add support for master mode selection for DWC SSI controller
Date: Thu, 11 Nov 2021 14:51:59 +0800	[thread overview]
Message-ID: <20211111065201.10249-4-nandhini.srikandan@intel.com> (raw)
In-Reply-To: <20211111065201.10249-1-nandhini.srikandan@intel.com>

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      | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/spi-dw-core.c b/drivers/spi/spi-dw-core.c
index bfa075a4f779..26d0ef87661d 100644
--- a/drivers/spi/spi-dw-core.c
+++ b/drivers/spi/spi-dw-core.c
@@ -308,8 +308,8 @@ static u32 dw_spi_prepare_cr0(struct dw_spi *dws, struct spi_device *spi)
 		/* CTRLR0[14] Slave Select Toggle Enable */
 		cr0 |= chip->sste << DWC_SSI_CTRLR0_SSTE_OFFSET;
 
-		if (dws->caps & DW_SPI_CAP_KEEMBAY_MST)
-			cr0 |= DWC_SSI_CTRLR0_KEEMBAY_MST;
+		/* CTRLR0[31] MST */
+		cr0 |= DWC_SSI_CTRLR0_MST;
 	}
 
 	return cr0;
diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h
index 2ee3f839de39..d67f62ff79c9 100644
--- a/drivers/spi/spi-dw.h
+++ b/drivers/spi/spi-dw.h
@@ -78,11 +78,11 @@
 #define DWC_SSI_CTRLR0_DFS_OFFSET	0
 
 /*
- * For Keem Bay, CTRLR0[31] is used to select controller mode.
+ * CTRLR0[31] is used to select controller mode.
  * 0: SSI is slave
  * 1: SSI is master
  */
-#define DWC_SSI_CTRLR0_KEEMBAY_MST	BIT(31)
+#define DWC_SSI_CTRLR0_MST		BIT(31)
 
 /* Bit fields in CTRLR1 */
 #define SPI_NDF_MASK			GENMASK(15, 0)
-- 
2.17.1

