lkml.org 
[lkml]   [2021]   [Oct]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 15/18] spi: mxic: Create a helper to configure the controller before an operation
Date
Create the mxic_spi_set_hc_cfg() helper to configure the HC_CFG
register. This helper will soon be used by the dirmap implementation and
having this code factorized out earlier will clarify this addition.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
drivers/spi/spi-mxic.c | 31 +++++++++++++++++++------------
1 file changed, 19 insertions(+), 12 deletions(-)

diff --git a/drivers/spi/spi-mxic.c b/drivers/spi/spi-mxic.c
index 03fce4493aa7..068543c40ce7 100644
--- a/drivers/spi/spi-mxic.c
+++ b/drivers/spi/spi-mxic.c
@@ -280,6 +280,22 @@ static void mxic_spi_hw_init(struct mxic_spi *mxic)
mxic->regs + HC_CFG);
}

+static u32 mxic_spi_prep_hc_cfg(struct spi_device *spi, u32 flags)
+{
+ int nio = 1;
+
+ if (spi->mode & (SPI_TX_OCTAL | SPI_RX_OCTAL))
+ nio = 8;
+ else if (spi->mode & (SPI_TX_QUAD | SPI_RX_QUAD))
+ nio = 4;
+ else if (spi->mode & (SPI_TX_DUAL | SPI_RX_DUAL))
+ nio = 2;
+
+ return flags | HC_CFG_NIO(nio) |
+ HC_CFG_TYPE(spi->chip_select, HC_CFG_TYPE_SPI_NOR) |
+ HC_CFG_SLV_ACT(spi->chip_select) | HC_CFG_IDLE_SIO_LVL(1);
+}
+
static int mxic_spi_data_xfer(struct mxic_spi *mxic, const void *txbuf,
void *rxbuf, unsigned int len)
{
@@ -357,7 +373,7 @@ static int mxic_spi_mem_exec_op(struct spi_mem *mem,
const struct spi_mem_op *op)
{
struct mxic_spi *mxic = spi_master_get_devdata(mem->spi->master);
- int nio = 1, i, ret;
+ int i, ret;
u32 ss_ctrl;
u8 addr[8], cmd[2];

@@ -365,18 +381,9 @@ static int mxic_spi_mem_exec_op(struct spi_mem *mem,
if (ret)
return ret;

- if (mem->spi->mode & (SPI_TX_OCTAL | SPI_RX_OCTAL))
- nio = 8;
- else if (mem->spi->mode & (SPI_TX_QUAD | SPI_RX_QUAD))
- nio = 4;
- else if (mem->spi->mode & (SPI_TX_DUAL | SPI_RX_DUAL))
- nio = 2;
-
- writel(HC_CFG_NIO(nio) |
- HC_CFG_TYPE(mem->spi->chip_select, HC_CFG_TYPE_SPI_NOR) |
- HC_CFG_SLV_ACT(mem->spi->chip_select) | HC_CFG_IDLE_SIO_LVL(1) |
- HC_CFG_MAN_CS_EN,
+ writel(mxic_spi_prep_hc_cfg(mem->spi, HC_CFG_MAN_CS_EN),
mxic->regs + HC_CFG);
+
writel(HC_EN_BIT, mxic->regs + HC_EN);

ss_ctrl = OP_CMD_BYTES(op->cmd.nbytes) |
--
2.27.0
\
 
 \ /
  Last update: 2021-10-20 16:29    [W:0.635 / U:0.448 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site