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From b300b013de16109f833782d9f4e7ee8cc204780f Mon Sep 17 00:00:00 2001
From: Samuel Holland <samuel@sholland.org>
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 <samuel@sholland.org>
---
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;
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