[U-Boot] [PATCH 4/5] x86: ich-spi: Move opcode registers configuration to another routine

[Stefan Roese]

On 16.08.2017 07:38, Bin Meng wrote:
> At present the ICH SPI opcode registers configuration is done in the
> ich_spi_remove() routine, a little bit weird but that's how current.
> Linux MTD driver works. This changes to move the opcode registers
> configuration to a separate routine ich_spi_config_opcode() which
> might be called by U-Boot itself as well.
> 
> Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
> ---
> 
>   drivers/spi/ich.c | 22 ++++++++++++++++------
>   1 file changed, 16 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/spi/ich.c b/drivers/spi/ich.c
> index d4888f5..373bc26 100644
> --- a/drivers/spi/ich.c
> +++ b/drivers/spi/ich.c
> @@ -338,6 +338,21 @@ static int ich_status_poll(struct ich_spi_priv *ctlr, u16 bitmask,
>   	return -ETIMEDOUT;
>   }
>   
> +void ich_spi_config_opcode(struct udevice *dev)
> +{
> +	struct ich_spi_priv *ctlr = dev_get_priv(dev);
> +
> +	/*
> +	 * PREOP, OPTYPE, OPMENU1/OPMENU2 registers can be locked down
> +	 * to prevent accidental or intentional writes. Before they get
> +	 * locked down, these registers should be initialized properly.
> +	 */
> +	ich_writew(ctlr, SPI_OPPREFIX, ctlr->preop);
> +	ich_writew(ctlr, SPI_OPTYPE, ctlr->optype);
> +	ich_writel(ctlr, SPI_OPMENU_LOWER, ctlr->opmenu);
> +	ich_writel(ctlr, SPI_OPMENU_UPPER, ctlr->opmenu + sizeof(u32));
> +}
> +
>   static int ich_spi_xfer(struct udevice *dev, unsigned int bitlen,
>   			const void *dout, void *din, unsigned long flags)
>   {
> @@ -585,16 +600,11 @@ static int ich_spi_probe(struct udevice *dev)
>   
>   static int ich_spi_remove(struct udevice *bus)
>   {
> -	struct ich_spi_priv *ctlr = dev_get_priv(bus);
> -
>   	/*
>   	 * Configure SPI controller so that the Linux MTD driver can fully
>   	 * access the SPI NOR chip
>   	 */
> -	ich_writew(ctlr, SPI_OPPREFIX, ctlr->preop);
> -	ich_writew(ctlr, SPI_OPTYPE, ctlr->optype);
> -	ich_writel(ctlr, SPI_OPMENU_LOWER, ctlr->opmenu);
> -	ich_writel(ctlr, SPI_OPMENU_UPPER, ctlr->opmenu + sizeof(u32));
> +	ich_spi_config_opcode(bus);
>   
>   	return 0;
>   }
> 

Reviewed-by: Stefan Roese <sr at denx.de>

Thanks,
Stefan