iic , device tree ; i2c device tree

msm8937 porting iic device

2015-12-21 15:10 本站整理 浏览(37)

msm8937 porting iic device，有需要的朋友可以参考下。

又要加touch了，重新搞一遍porting工作，还是遇到了一些问题。

首先往Dtsi文件里加iic device的时候要注意看iic bus是否已经挂载成功了

我就遇到了用i2cdetect扫描bus的时候没有看到，结果在dtsi文件里发现bus是disable的

i2c_3: i2c@78b7000 { /* BLSP1 QUP3 */
compatible = "qcom,i2c-msm-v2";

#address-cells = <1>;
#size-cells = <0>;

reg-names = "qup_phys_addr";
reg = <0x78b7000 0x600>;

interrupt-names = "qup_irq";
interrupts = <0 97 0>;

qcom,clk-freq-out = <400000>;
qcom,clk-freq-in = <19200000>;

clock-names = "iface_clk", "core_clk";
clocks = <&clock_gcc clk_gcc_blsp1_ahb_clk>,

<&clock_gcc clk_gcc_blsp1_qup3_i2c_apps_clk>;

pinctrl-names = "i2c_active", "i2c_sleep";

pinctrl-0 = <&i2c_3_active>;
pinctrl-1 = <&i2c_3_sleep>;

qcom,noise-rjct-scl = <0>;
qcom,noise-rjct-sda = <0>;

qcom,master-id = <86>;
dmas = <&dma_blsp1 8 64 0x20000020 0x20>,

<&dma_blsp1 9 32 0x20000020 0x20>;
dma-names = "tx", "rx";

/*status = "disabled";*/ 这句话先禁了
};

 

&i2c_3 { /* BLSP1 QUP4 */ 
focaltech@38 {

compatible = "focaltech,5x06";
reg = <0x38>;

interrupt-parent = <&tlmm>; //这里变了以前是gpio
interrupts = <65 0x2008>;

vdd-supply = <&pm8937_l10>;
vcc_i2c-supply = <&pm8937_l5>;//这里也变了

/* pins used by touchscreen */
pinctrl-names = "pmx_ts_active","pmx_ts_suspend","pmx_ts_release";

pinctrl-0 = <&ts_int_active &ts_reset_active>;
pinctrl-1 = <&ts_int_suspend &ts_reset_suspend>;

pinctrl-2 = <&ts_release>;
focaltech,name = "ft5346";

focaltech,family-id = <0x54>;
focaltech,reset-gpio = <&tlmm 64 0x0>;//这里也变了

focaltech,irq-gpio = <&tlmm 65 0x2008>;//这里也变了
focaltech,display-coords = <0 0 720 1280>;

focaltech,panel-coords = <0 0 720 1400>;
focaltech,button-map= <139 102 158>;

focaltech,no-force-update;
focaltech,i2c-pull-up;

focaltech,group-id = <1>;
focaltech,hard-reset-delay-ms = <20>;

focaltech,soft-reset-delay-ms = <200>;
focaltech,num-max-touches = <5>;

focaltech,fw-delay-aa-ms = <30>;
focaltech,fw-delay-55-ms = <30>;

focaltech,fw-upgrade-id1 = <0x79>;
focaltech,fw-upgrade-id2 = <0x18>;

focaltech,fw-delay-readid-ms = <10>;
focaltech,fw-delay-era-flsh-ms = <2000>;

focaltech,fw-auto-cal;
focaltech,ignore-id-check;

};
};

想要确定i2c设备挂在哪个bus上，那就看i2c的gpio是哪两条

再找相应的gpio

类似

i2c_3 {
i2c_3_active: i2c_3_active {

/* active state */
mux {

pins = "gpio10", "gpio11";
function = "blsp_i2c3";

};

 

config {
pins = "gpio10", "gpio11";

drive-strength = <2>;
bias-disable;

};
};

 

 

i2c_3_sleep: i2c_3_sleep {
/* suspended state */

mux {
pins = "gpio10", "gpio11";

function = "gpio";
};

 

config {
pins = "gpio10", "gpio11";
drive-strength = <2>;

bias-pull-down;
};
};

};

说明在bus3上

Dtsi文件的修改就到这边了