rt_ssize_t can give negative error code, which follows the unix style correctly
* [renesas/ra2l1-cpk] add Captouch板载触摸按键配置说明.md * Update Captouch板载触摸按键配置说明.md * [renesas/drv_wdt.c] Fix error code issues [renesas/drv_i2c.c] add hardware i2c driver * [update] drv_wdt.c,drv_i2c.c Co-authored-by: Man, Jianting (Meco) <920369182@qq.com>