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From:   Krishna Yarlagadda <kyarlagadda@nvidia.com>
To:     <broonie@kernel.org>, <thierry.reding@gmail.com>,
        <jonathanh@nvidia.com>, <linux-spi@vger.kernel.org>,
        <linux-tegra@vger.kernel.org>
CC:     <skomatineni@nvidia.com>, <ldewangan@nvidia.com>,
        <linux-kernel@vger.kernel.org>,
        Krishna Yarlagadda <kyarlagadda@nvidia.com>
Subject: [PATCH 3/5] spi: tegra210-quad: Use nbits in combined seq
Date:   Sat, 1 Oct 2022 17:51:46 +0530
Message-ID: <20221001122148.9158-3-kyarlagadda@nvidia.com>
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Combined sequence currently forces cmd and addr transfers in X1.
Check nbits for CMD and ADDR xfers and update config registers.

Signed-off-by: Krishna Yarlagadda <kyarlagadda@nvidia.com>
---
 drivers/spi/spi-tegra210-quad.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/spi/spi-tegra210-quad.c b/drivers/spi/spi-tegra210-quad.c
index 06bf19d0cfc1..be11daafb7d4 100644
--- a/drivers/spi/spi-tegra210-quad.c
+++ b/drivers/spi/spi-tegra210-quad.c
@@ -135,7 +135,7 @@
 #define QSPI_COMMAND_VALUE_SET(X)		(((x) & 0xFF) << 0)
 
 #define QSPI_CMB_SEQ_CMD_CFG			0x1a0
-#define QSPI_COMMAND_X1_X2_X4(x)		(((x) & 0x3) << 13)
+#define QSPI_COMMAND_X1_X2_X4(x)		((((x) >> 1) & 0x3) << 13)
 #define QSPI_COMMAND_X1_X2_X4_MASK		(0x03 << 13)
 #define QSPI_COMMAND_SDR_DDR			BIT(12)
 #define QSPI_COMMAND_SIZE_SET(x)		(((x) & 0xFF) << 0)
@@ -147,7 +147,7 @@
 #define QSPI_ADDRESS_VALUE_SET(X)		(((x) & 0xFFFF) << 0)
 
 #define QSPI_CMB_SEQ_ADDR_CFG			0x1ac
-#define QSPI_ADDRESS_X1_X2_X4(x)		(((x) & 0x3) << 13)
+#define QSPI_ADDRESS_X1_X2_X4(x)		((((x) >> 1) & 0x3) << 13)
 #define QSPI_ADDRESS_X1_X2_X4_MASK		(0x03 << 13)
 #define QSPI_ADDRESS_SDR_DDR			BIT(12)
 #define QSPI_ADDRESS_SIZE_SET(x)		(((x) & 0xFF) << 0)
@@ -1029,10 +1029,6 @@ static u32 tegra_qspi_addr_config(bool is_ddr, u8 bus_width, u8 len)
 {
 	u32 addr_config = 0;
 
-	/* Extract Address configuration and value */
-	is_ddr = 0; //Only SDR mode supported
-	bus_width = 0; //X1 mode
-
 	if (is_ddr)
 		addr_config |= QSPI_ADDRESS_SDR_DDR;
 	else
@@ -1066,13 +1062,13 @@ static int tegra_qspi_combined_seq_xfer(struct tegra_qspi *tqspi,
 		switch (transfer_phase) {
 		case CMD_TRANSFER:
 			/* X1 SDR mode */
-			cmd_config = tegra_qspi_cmd_config(false, 0,
+			cmd_config = tegra_qspi_cmd_config(false, xfer->tx_nbits,
 							   xfer->len);
 			cmd_value = *((const u8 *)(xfer->tx_buf));
 			break;
 		case ADDR_TRANSFER:
 			/* X1 SDR mode */
-			addr_config = tegra_qspi_addr_config(false, 0,
+			addr_config = tegra_qspi_addr_config(false, xfer->tx_nbits,
 							     xfer->len);
 			address_value = *((const u32 *)(xfer->tx_buf));
 			break;
-- 
2.17.1