[U-Boot] [PATCH] power_spi.c: Rewrite pmic_reg function

[Stefano Babic <sbabic@denx.de>]

Hi Tom.

On 25/10/2014 13:38, Tom Rini wrote:
> The pmic_spi_free function isn't ever used, and as the frameworks stand
> today, cannot be, so remove it.

That's right - it was originally implemented to have a symmetric
interface, but never used.

>  Integrate the probe function into
> pmic_reg as it's not really a "probe" today.  Finally, add an err label
> for the common failure cases.
> 
> Cc: Lukasz Majewski <l.majewski@samsung.com>
> Cc: Przemyslaw Marczak <p.marczak@samsung.com>
> Cc: Stefano Babic <sbabic@denx.de>
> Signed-off-by: Tom Rini <trini@ti.com>
> ---
>  drivers/power/power_spi.c |   33 ++++++++++-----------------------
>  1 file changed, 10 insertions(+), 23 deletions(-)
> 
> diff --git a/drivers/power/power_spi.c b/drivers/power/power_spi.c
> index fb455a00..1e55446 100644
> --- a/drivers/power/power_spi.c
> +++ b/drivers/power/power_spi.c
> @@ -17,27 +17,14 @@
>  
>  static struct spi_slave *slave;
>  
> -void pmic_spi_free(struct spi_slave *slave)
> -{
> -	if (slave)
> -		spi_free_slave(slave);
> -}
> -
> -struct spi_slave *pmic_spi_probe(struct pmic *p)
> -{
> -	return spi_setup_slave(p->bus,
> -		p->hw.spi.cs,
> -		p->hw.spi.clk,
> -		p->hw.spi.mode);
> -}
> -
>  static u32 pmic_reg(struct pmic *p, u32 reg, u32 *val, u32 write)
>  {
>  	u32 pmic_tx, pmic_rx;
>  	u32 tmp;
>  
>  	if (!slave) {
> -		slave = pmic_spi_probe(p);
> +		slave = spi_setup_slave(p->bus, p->hw.spi.cs, p->hw.spi.clk,
> +					p->hw.spi.mode);
>  
>  		if (!slave)
>  			return -1;
> @@ -54,25 +41,25 @@ static u32 pmic_reg(struct pmic *p, u32 reg, u32 *val, u32 write)
>  	tmp = cpu_to_be32(pmic_tx);
>  
>  	if (spi_xfer(slave, pmic_spi_bitlen, &tmp, &pmic_rx,
> -			pmic_spi_flags)) {
> -		spi_release_bus(slave);
> -		return -1;
> -	}
> +			pmic_spi_flags))
> +		goto err;
>  
>  	if (write) {
>  		pmic_tx = p->hw.spi.prepare_tx(reg, val, 0);
>  		tmp = cpu_to_be32(pmic_tx);
>  		if (spi_xfer(slave, pmic_spi_bitlen, &tmp, &pmic_rx,
> -			pmic_spi_flags)) {
> -			spi_release_bus(slave);
> -			return -1;
> -		}
> +			pmic_spi_flags))
> +			goto err;
>  	}
>  
>  	spi_release_bus(slave);
>  	*val = cpu_to_be32(pmic_rx);
>  
>  	return 0;
> +
> +err:
> +	spi_release_bus(slave);
> +	return -1;
>  }
>  
>  int pmic_reg_write(struct pmic *p, u32 reg, u32 val)
> 

Acked-by: Stefano Babic <sbabic@denx.de>

Best regards,
Stefano Babic

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