linux-kernel - Re: [PATCH] i2c: mediatek: Fix generic definitions for bus frequencies

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Date:   Sun, 13 Sep 2020 23:15:56 +0800
From:   Yingjoe Chen <yingjoe.chen@...iatek.com>
To:     <qii.wang@...iatek.com>
CC:     <wsa@...-dreams.de>, <devicetree@...r.kernel.org>,
        <srv_heupstream@...iatek.com>, <leilk.liu@...iatek.com>,
        <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>, <linux-i2c@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        "Andy Shevchenko" <andriy.shevchenko@...ux.intel.com>
Subject: Re: [PATCH] i2c: mediatek: Fix generic definitions for bus
 frequencies

On Sat, 2020-09-12 at 13:57 +0800, qii.wang@...iatek.com wrote:
> From: Qii Wang <qii.wang@...iatek.com>
> 
> The master code needs to being sent when the speed is more than
> I2C_MAX_FAST_MODE_PLUS_FREQ instead of
> I2C_MAX_HIGH_SPEED_MODE_FREQ. Fix it.

This was introduced by "i2c: drivers: Use generic definitions for bus
frequencies". You should have
Fixes: 90224e6468e1 ("i2c: drivers: Use generic definitions for bus
frequencies")

You can have my reviewed by after you add fixes.
Reviewed-by: Yingjoe Chen <yingjoe.chen@...iatek.com>

Joe.C

> 
> Signed-off-by: Qii Wang <qii.wang@...iatek.com>
> ---
>  drivers/i2c/busses/i2c-mt65xx.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
> index efc1404..0cbdfbe 100644
> --- a/drivers/i2c/busses/i2c-mt65xx.c
> +++ b/drivers/i2c/busses/i2c-mt65xx.c
> @@ -681,8 +681,8 @@ static int mtk_i2c_calculate_speed(struct mtk_i2c *i2c, unsigned int clk_src,
>  	unsigned int cnt_mul;
>  	int ret = -EINVAL;
>  
> -	if (target_speed > I2C_MAX_FAST_MODE_PLUS_FREQ)
> -		target_speed = I2C_MAX_FAST_MODE_PLUS_FREQ;
> +	if (target_speed > I2C_MAX_HIGH_SPEED_MODE_FREQ)
> +		target_speed = I2C_MAX_HIGH_SPEED_MODE_FREQ;
>  
>  	max_step_cnt = mtk_i2c_max_step_cnt(target_speed);
>  	base_step_cnt = max_step_cnt;
> @@ -759,7 +759,7 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
>  	for (clk_div = 1; clk_div <= max_clk_div; clk_div++) {
>  		clk_src = parent_clk / clk_div;
>  
> -		if (target_speed > I2C_MAX_FAST_MODE_FREQ) {
> +		if (target_speed > I2C_MAX_FAST_MODE_PLUS_FREQ) {
>  			/* Set master code speed register */
>  			ret = mtk_i2c_calculate_speed(i2c, clk_src,
>  						      I2C_MAX_FAST_MODE_FREQ,