openwrt/target/linux/d1/patches-6.1/0077-spi-spi-sun6i-Dual-Quad-RX-Support.patch

From b300b013de16109f833782d9f4e7ee8cc204780f Mon Sep 17 00:00:00 2001
From: Samuel Holland <[email protected]>
Date: Sat, 17 Jul 2021 11:19:29 -0500
Subject: [PATCH 077/117] spi: spi-sun6i: Dual/Quad RX Support

Signed-off-by: Samuel Holland <[email protected]>
---
 drivers/spi/spi-sun6i.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

--- a/drivers/spi/spi-sun6i.c
+++ b/drivers/spi/spi-sun6i.c
@@ -82,6 +82,8 @@
 #define SUN6I_XMIT_CNT_REG		0x34
 
 #define SUN6I_BURST_CTL_CNT_REG		0x38
+#define SUN6I_BURST_CTL_CNT_QUAD_EN		BIT(29)
+#define SUN6I_BURST_CTL_CNT_DUAL_EN		BIT(28)
 
 #define SUN6I_TXDATA_REG		0x200
 #define SUN6I_RXDATA_REG		0x300
@@ -415,7 +417,17 @@ static int sun6i_spi_transfer_one(struct
 	/* Setup the counters */
 	sun6i_spi_write(sspi, SUN6I_BURST_CNT_REG, tfr->len);
 	sun6i_spi_write(sspi, SUN6I_XMIT_CNT_REG, tx_len);
-	sun6i_spi_write(sspi, SUN6I_BURST_CTL_CNT_REG, tx_len);
+
+	reg = tx_len;
+	switch (tfr->rx_nbits) {
+	case SPI_NBITS_QUAD:
+		reg |= SUN6I_BURST_CTL_CNT_QUAD_EN;
+		break;
+	case SPI_NBITS_DUAL:
+		reg |= SUN6I_BURST_CTL_CNT_DUAL_EN;
+		break;
+	}
+	sun6i_spi_write(sspi, SUN6I_BURST_CTL_CNT_REG, reg);
 
 	if (!use_dma) {
 		/* Fill the TX FIFO */
@@ -632,7 +644,8 @@ static int sun6i_spi_probe(struct platfo
 	master->set_cs = sun6i_spi_set_cs;
 	master->transfer_one = sun6i_spi_transfer_one;
 	master->num_chipselect = 4;
-	master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST;
+	master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST
+			  | SPI_RX_DUAL | SPI_RX_QUAD;
 	master->bits_per_word_mask = SPI_BPW_MASK(8);
 	master->dev.of_node = pdev->dev.of_node;
 	master->auto_runtime_pm = true;