在hikey960上移植了tsl2561光感芯片现在跟大家交流下移植办法

硬件准备：

Hikey960

96Boards Sensors

TSL2561

移植过程：

参考硬件原理图，板子引出了2个I2C接口，分别是I2C0和I2C7.

现在开始添加代码。

在aosp\hikey-linaro\arch\arm64\boot\dts\hisilicon\hi3660.dtsi中配置I2C0，这样就可以编进kernel。

i2c0: i2c@FFD71000 {

                            compatible = "snps,designware-i2c";

                            reg = <0x0 0xFFD71000 0x0 0x1000>;

                            interrupts = <0 118 4>;

                        #address-cells = <1>;

                        #size-cells = <0>;

                            clock-frequency = <400000>;

                            clocks = <&crg_ctrl HI3660_CLK_GATE_I2C0>;

                            resets = <&iomcu_rst HI3660_RST_I2C0>;

                            pinctrl-names = "default";

                            pinctrl-0 = <&i2c0_pmx_func &i2c0_cfg_func>;

                            status = "ok";

                            TSL2561_i2c: TSL2561_i2c@29 {

                                     compatible = "tsl,TSL2561_i2c";

                                     reg = <0x29>;

                                     status = "ok";

                            };

                   };

因为I2C2和I2C7是复用的，所以如果要使用I2C7，请注意要把I2C2 disable掉。

i2c2: i2c@FFD73000 {

                            compatible = "snps,designware-i2c";

                            reg = <0x0 0xFFD73000 0x0 0x1000>;

                            interrupts = <0 120 4>;

                        #address-cells = <1>;

                        #size-cells = <0>;

                            clock-frequency = <400000>;

                            clocks = <&crg_ctrl HI3660_CLK_GATE_I2C2>;

                            resets = <&iomcu_rst HI3660_RST_I2C2>;

                            pinctrl-names = "default";

                            pinctrl-0 = <&i2c2_pmx_func &i2c2_cfg_func>;

                            status = "disabled";

                   };

将参考代码放到aosp\hikey-linaro\drivers目录下，然后配置此目录下的kconfig文件和Makefile。

Kconfig中添加

source "drivers/sl2561_hikey/Kconfig"

Makefile中添加

obj-$(CONFIG_TSL2561)           += tsl2561_hikey/

最后在Z:\aosp\hikey-linaro\arch\arm64\configs\hikey960_defconfig中添加对应的宏。

CONFIG_TSL2561=y

到此代码的添加已经结束。

接下来就是编译，按照编译教程所述，先编译kernel，然后将kernel生成的image.gz和dtb文件重命名并放入aosp中，最后全编aosp。编译完成后烧录image即可。

最后来验证一下，开机进入adb，正常情况会在如下路径下生成对应的节点，然后cat data，就会出现数据。

移植完毕，还望斧正

将代码和大家共享

https://github.com/archermind666/tsl2561_on_hikey