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

   1 From b300b013de16109f833782d9f4e7ee8cc204780f Mon Sep 17 00:00:00 2001
   2 From: Samuel Holland <samuel@sholland.org>
   3 Date: Sat, 17 Jul 2021 11:19:29 -0500
   4 Subject: [PATCH 077/117] spi: spi-sun6i: Dual/Quad RX Support
   5
   6 Signed-off-by: Samuel Holland <samuel@sholland.org>
   7 ---
   8  drivers/spi/spi-sun6i.c | 17 +++++++++++++++--
   9  1 file changed, 15 insertions(+), 2 deletions(-)
  10
  11 --- a/drivers/spi/spi-sun6i.c
  12 +++ b/drivers/spi/spi-sun6i.c
  13 @@ -82,6 +82,8 @@
  14  #define SUN6I_XMIT_CNT_REG             0x34
  15
  16  #define SUN6I_BURST_CTL_CNT_REG                0x38
  17 +#define SUN6I_BURST_CTL_CNT_QUAD_EN            BIT(29)
  18 +#define SUN6I_BURST_CTL_CNT_DUAL_EN            BIT(28)
  19
  20  #define SUN6I_TXDATA_REG               0x200
  21  #define SUN6I_RXDATA_REG               0x300
  22 @@ -415,7 +417,17 @@ static int sun6i_spi_transfer_one(struct
  23         /* Setup the counters */
  24         sun6i_spi_write(sspi, SUN6I_BURST_CNT_REG, tfr->len);
  25         sun6i_spi_write(sspi, SUN6I_XMIT_CNT_REG, tx_len);
  26 -       sun6i_spi_write(sspi, SUN6I_BURST_CTL_CNT_REG, tx_len);
  27 +
  28 +       reg = tx_len;
  29 +       switch (tfr->rx_nbits) {
  30 +       case SPI_NBITS_QUAD:
  31 +               reg |= SUN6I_BURST_CTL_CNT_QUAD_EN;
  32 +               break;
  33 +       case SPI_NBITS_DUAL:
  34 +               reg |= SUN6I_BURST_CTL_CNT_DUAL_EN;
  35 +               break;
  36 +       }
  37 +       sun6i_spi_write(sspi, SUN6I_BURST_CTL_CNT_REG, reg);
  38
  39         if (!use_dma) {
  40                 /* Fill the TX FIFO */
  41 @@ -632,7 +644,8 @@ static int sun6i_spi_probe(struct platfo
  42         master->set_cs = sun6i_spi_set_cs;
  43         master->transfer_one = sun6i_spi_transfer_one;
  44         master->num_chipselect = 4;
  45 -       master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST;
  46 +       master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST
  47 +                         | SPI_RX_DUAL | SPI_RX_QUAD;
  48         master->bits_per_word_mask = SPI_BPW_MASK(8);
  49         master->dev.of_node = pdev->dev.of_node;
  50         master->auto_runtime_pm = true;