请教SDIOwifi的问题
在3399上的wifi信号比较差，想改信号强度，但sdio的dts配置中没有相关描述只看到emmc的信息。《Rockchip RK3399 TRM V1.4 Part2-20170408.pdf》里的emmc host controller章节有如下描述：
The ‘phyctrl_dr_ty’ are used to program the drive strength of the IO in push/pull
mode of operation by programming the source/sink impedance of EMMC51 IO. The PAD
source/sink impedance can be programmed to 50, 33, 66, 100 or 40 Ohms
在drivers/phy/phy-rockchiop-emmc.c文件中有
68 #define PHYCTRL_DR_50OHM 0x0
69 #define PHYCTRL_DR_33OHM 0x1
70 #define PHYCTRL_DR_66OHM 0x2
71 #define PHYCTRL_DR_100OHM 0x3
72 #define PHYCTRL_DR_40OHM 0x4
/* Drive impedance: 50 Ohm */292 regmap_write(rk_phy->reg_base,293 rk_phy->reg_offset + GRF_EMMCPHY_CON6,294 HIWORD_UPDATE(PHYCTRL_DR_50OHM,295 PHYCTRL_DR_MASK,296 PHYCTRL_DR_SHIFT));更改PHYCTRL_DR_50OHM>PHYCTRL_DR_100OHM
但发现sdio0的驱动强度没有改变 ，请问这里的drive strength是指什么意思？
硬件sdio0接到wifi网卡，这里也没有看到改的是哪一路sdio，如果我想要改sdio0的驱动强度应该怎么改呢？
页:
[1]