[U-Boot] [PATCH] spi: cadence_qspi: Add quad write support

[Ley Foon Tan <ley.foon.tan@intel.com>]

On Wed, 2019-02-27 at 10:38 +0530, Vignesh R wrote:
> 
> On 26/02/19 1:59 PM, Ley Foon Tan wrote:
> > 
> > Use quad write if SPI_TX_QUAD flag is set.
> > 
> How was the patch tested? Could you add that info to commit msg?
Tested on Stratix 10 SoC board.
Will update commit message.
> 
> > 
> > Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
> > ---
> >  drivers/spi/cadence_qspi.c     | 2 +-
> >  drivers/spi/cadence_qspi.h     | 2 +-
> >  drivers/spi/cadence_qspi_apb.c | 7 ++++++-
> >  3 files changed, 8 insertions(+), 3 deletions(-)
> >  mode change 100644 => 100755 drivers/spi/cadence_qspi.c
> >  mode change 100644 => 100755 drivers/spi/cadence_qspi.h
> >  mode change 100644 => 100755 drivers/spi/cadence_qspi_apb.c
> > 
> Why are the permissions being changed? Please keep it as is
Change it accidentally. Will fix this.
> 
> > 
> > diff --git a/drivers/spi/cadence_qspi.c
> > b/drivers/spi/cadence_qspi.c
> > old mode 100644
> > new mode 100755
> > index 11fce9c4fe..efdb178450
> > --- a/drivers/spi/cadence_qspi.c
> > +++ b/drivers/spi/cadence_qspi.c
> > @@ -256,7 +256,7 @@ static int cadence_spi_xfer(struct udevice
> > *dev, unsigned int bitlen,
> >  		break;
> >  		case CQSPI_INDIRECT_WRITE:
> >  			err =
> > cadence_qspi_apb_indirect_write_setup
> > -				(plat, priv->cmd_len, cmd_buf);
> > +				(plat, priv->cmd_len, dm_plat-
> > >mode, cmd_buf);
> >  			if (!err) {
> >  				err =
> > cadence_qspi_apb_indirect_write_execute
> >  				(plat, data_bytes, dout);
> > diff --git a/drivers/spi/cadence_qspi.h
> > b/drivers/spi/cadence_qspi.h
> > old mode 100644
> > new mode 100755
> > index 055900def0..b491407130
> > --- a/drivers/spi/cadence_qspi.h
> > +++ b/drivers/spi/cadence_qspi.h
> > @@ -60,7 +60,7 @@ int cadence_qspi_apb_indirect_read_setup(struct
> > cadence_spi_platdata *plat,
> >  int cadence_qspi_apb_indirect_read_execute(struct
> > cadence_spi_platdata *plat,
> >  	unsigned int rxlen, u8 *rxbuf);
> >  int cadence_qspi_apb_indirect_write_setup(struct
> > cadence_spi_platdata *plat,
> > -	unsigned int cmdlen, const u8 *cmdbuf);
> > +	unsigned int cmdlen, unsigned int tx_width, const u8
> > *cmdbuf);
> >  int cadence_qspi_apb_indirect_write_execute(struct
> > cadence_spi_platdata *plat,
> >  	unsigned int txlen, const u8 *txbuf);
> >  
> > diff --git a/drivers/spi/cadence_qspi_apb.c
> > b/drivers/spi/cadence_qspi_apb.c
> > old mode 100644
> > new mode 100755
> > index a8af352030..55a7501913
> > --- a/drivers/spi/cadence_qspi_apb.c
> > +++ b/drivers/spi/cadence_qspi_apb.c
> > @@ -77,6 +77,7 @@
> >  
> >  #define	CQSPI_REG_WR_INSTR			0x08
> >  #define	CQSPI_REG_WR_INSTR_OPCODE_LSB		0
> > +#define	CQSPI_REG_WR_INSTR_TYPE_DATA_LSB	16
> >  
> >  #define	CQSPI_REG_DELAY				0x0C
> >  #define	CQSPI_REG_DELAY_TSLCH_LSB		0
> > @@ -686,7 +687,7 @@ failrd:
> >  
> >  /* Opcode + Address (3/4 bytes) */
> >  int cadence_qspi_apb_indirect_write_setup(struct
> > cadence_spi_platdata *plat,
> > -	unsigned int cmdlen, const u8 *cmdbuf)
> > +	unsigned int cmdlen, unsigned int tx_width, const u8
> > *cmdbuf)
> >  {
> >  	unsigned int reg;
> >  	unsigned int addr_bytes = cmdlen > 4 ? 4 : 3;
> > @@ -702,6 +703,10 @@ int
> > cadence_qspi_apb_indirect_write_setup(struct cadence_spi_platdata
> > *plat,
> >  
> >  	/* Configure the opcode */
> >  	reg = cmdbuf[0] << CQSPI_REG_WR_INSTR_OPCODE_LSB;
> > +
> > +	if (tx_width & SPI_TX_QUAD)
> > +		reg |= CQSPI_INST_TYPE_QUAD <<
> > CQSPI_REG_WR_INSTR_TYPE_DATA_LSB;
> > +
> >  	writel(reg, plat->regbase + CQSPI_REG_WR_INSTR);
> >  
> >  	/* Setup write address. */
> >