linux-kernel - Re: [PATCH 1/2] i2c: qcom-geni: Provide an option to select FIFO processing

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Date:   Wed, 4 Sep 2019 17:28:27 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     alokc@...eaurora.org, agross@...nel.org, robh+dt@...nel.org,
        mark.rutland@....com, bjorn.andersson@...aro.org,
        linux-i2c@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] i2c: qcom-geni: Provide an option to select FIFO
 processing

On 04-09-19, 12:36, Lee Jones wrote:
> Signed-off-by: Lee Jones <lee.jones@...aro.org>

Reviewed-by: Vinod Koul <vkoul@...nel.org>

> ---
>  drivers/i2c/busses/i2c-qcom-geni.c | 14 ++++++++++----
>  1 file changed, 10 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c
> index a89bfce5388e..dfdbce067827 100644
> --- a/drivers/i2c/busses/i2c-qcom-geni.c
> +++ b/drivers/i2c/busses/i2c-qcom-geni.c
> @@ -353,13 +353,16 @@ static void geni_i2c_tx_fsm_rst(struct geni_i2c_dev *gi2c)
>  static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
>  				u32 m_param)
>  {
> +	struct device_node *np = gi2c->se.dev->of_node;
>  	dma_addr_t rx_dma;
>  	unsigned long time_left;
> -	void *dma_buf;
> +	void *dma_buf = NULL;
>  	struct geni_se *se = &gi2c->se;
>  	size_t len = msg->len;
>  
> -	dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
> +	if (!of_property_read_bool(np, "qcom,geni-se-fifo"))
> +		dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
> +
>  	if (dma_buf)
>  		geni_se_select_mode(se, GENI_SE_DMA);
>  	else
> @@ -392,13 +395,16 @@ static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
>  static int geni_i2c_tx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg,
>  				u32 m_param)
>  {
> +	struct device_node *np = gi2c->se.dev->of_node;
>  	dma_addr_t tx_dma;
>  	unsigned long time_left;
> -	void *dma_buf;
> +	void *dma_buf = NULL;
>  	struct geni_se *se = &gi2c->se;
>  	size_t len = msg->len;
>  
> -	dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
> +	if (!of_property_read_bool(np, "qcom,geni-se-fifo"))
> +		dma_buf = i2c_get_dma_safe_msg_buf(msg, 32);
> +
>  	if (dma_buf)
>  		geni_se_select_mode(se, GENI_SE_DMA);
>  	else
> -- 
> 2.17.1

-- 
~Vinod