linux-kernel - Re: [PATCH] Input: raydium_i2c_ts - read device version in bootloader mode

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Date:   Sun, 5 Sep 2021 19:56:27 -0700
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     "simba.hsu" <simba.hsu@...dium.corp-partner.google.com>
Cc:     simba.hsu@...-ic.com, furquan@...gle.com, seanpaul@...omium.org,
        rrangle@...omium.org, linux-input@...r.kernel.org,
        linux-kernel@...r.kernel.org, KP.li@...-ic.com,
        jeffrey.lin@...-ic.com
Subject: Re: [PATCH] Input: raydium_i2c_ts - read device version in
 bootloader mode

On Wed, Aug 18, 2021 at 02:36:44PM +0800, simba.hsu wrote:
> Add support reading device ID when controller is in bootloader
> mode, which may happen if firmware update has been interrupted.
> 
> Signed-off-by: simba.hsu <simba.hsu@...-ic.com>
> ---
>  drivers/input/touchscreen/raydium_i2c_ts.c | 52 ++++++++++++++++++----
>  1 file changed, 44 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/input/touchscreen/raydium_i2c_ts.c b/drivers/input/touchscreen/raydium_i2c_ts.c
> index 4d2d22a86977..d3f8cc3285a2 100644
> --- a/drivers/input/touchscreen/raydium_i2c_ts.c
> +++ b/drivers/input/touchscreen/raydium_i2c_ts.c
> @@ -36,7 +36,8 @@
>  #define RM_CMD_BOOT_CHK		0x33		/* send data check */
>  #define RM_CMD_BOOT_READ	0x44		/* send wait bl data ready*/
>  
> -#define RM_BOOT_RDY		0xFF		/* bl data ready */
> +#define RM_BOOT_RDY		0xFF			/* bl data ready */
> +#define RM_BOOT_CMD_READHWID	0x0E	/* read hwid */
>  
>  /* I2C main commands */
>  #define RM_CMD_QUERY_BANK	0x2B
> @@ -155,6 +156,7 @@ static int raydium_i2c_xfer(struct i2c_client *client, u32 addr,
>  	 * sent first. Else, skip the header i.e. xfer[0].
>  	 */
>  	int xfer_start_idx = (addr > 0xff) ? 0 : 1;
> +
>  	xfer_count -= xfer_start_idx;

I dropped this unrelated chunk, made couple of cosmetic changes and
applied, thank you.

-- 
Dmitry