增加spi驱动能力,高通313驱动

1. 设备树 //msm8909.dtsi: spi_1: spi@78b9000 { /kfdy BLSP1 QUP5 kfdy/ compatible = "qcom,spi-qup-v2";//厂商设备名 #address-cells = <1>;//子元素地址值的个数 #size-cells = <0>;//子元素长度值的个数 reg-names = "spi_physical", "spi_bam_physical"; reg = <0x78b9000 0x600>,//SPI地址 <0x7884000 0x23000>;//BAM地址 interrupt-names = "spi_irq", "spi_bam_irq"; /kfdy中断号（BLSP4SWDocumentBSPPeripheralsBAM，SWDocumentBSPPeripheralsBAM） BLSP[1~12]->IRQ[95~106] BLSP[1~6]->BAM IRQ =238,BLSP[7~12]->BAM IRQ =239 kfdy/ interrupts = <0 99 0>, <0 238 0>; spi-max-frequency = <19200000>;//最大传输波特率 pinctrl-names = "spi_default", "spi_sleep"; pinctrl-0 = <&spi1_default &spi1_cs0_active>; pinctrl-1 = <&spi1_sleep &spi1_cs0_sleep>; clocks = <&clock_gcc clk_gcc_blsp1_ahb_clk>, <&clock_gcc clk_gcc_blsp1_qup5_spi_apps_clk>; clock-names = "iface_clk", "core_clk"; qcom,infinite-mode = <0>;//qup初始模式 qcom,use-bam; qcom,use-pinctrl; qcom,ver-reg-exists; /kfdy bam-consumer-pipe-index:BLSP BAM pipes 见SWDocumentBSPPeripheralsBAM Table4-5 bam-producer-pipe-index:BLSP BAM pipes 见SWDocumentBSPPeripheralsBAM Table4-5 kfdy/ qcom,bam-consumer-pipe-index = <18>; qcom,bam-producer-pipe-index = <19>; //BLSP bus master ID 见SWDocumentBSPPeripheralsBAM Table4-3 qcom,master-id = <86>; };//msm8909-pinctrl.dtsi: spi1_active { /kfdy MOSI, MISO, CLK kfdy/ qcom,pins = <&gp 16>, <&gp 17>, <&gp 19>; qcom,num-grp-pins = <3>;//how many pins contains in all qcom,pin-func = <1>;//function pin label = "spi1-active"; /kfdy active state kfdy/ spi1_default: spi1_default { drive-strength = <12>; /kfdy 12 MA kfdy/ bias-disable = <0>; /kfdy No PULL kfdy/ }; }; spi1_suspend { /kfdy MOSI, MISO, CLK kfdy/ qcom,pins = <&gp 16>, <&gp 17>, <&gp 19>; qcom,num-grp-pins = <3>; qcom,pin-func = <0>; label = "spi1-suspend"; /kfdy suspended state kfdy/ spi1_sleep: spi1_sleep { drive-strength = <2>; /kfdy 2 MA kfdy/ bias-pull-down; /kfdy pull down kfdy/ }; }; spi1_cs0_active { /kfdy CS kfdy/ qcom,pins = <&gp 18>; qcom,num-grp-pins = <1>; qcom,pin-func = <1>; label = "spi1-cs0-active"; spi1_cs0_active: cs0_active { drive-strength = <2>; bias-disable = <0>; }; }; spi1_cs0_suspend { /kfdy CS kfdy/ qcom,pins = <&gp 18>; qcom,num-grp-pins = <1>; qcom,pin-func = <0>; label = "spi1-cs0-suspend"; spi1_cs0_sleep: cs0_sleep { drive-strength = <2>; bias-disable = <0>; }; }; 注意： 如有GPIO重复使用，请屏蔽相关gpio和相关驱动（如I2C_5，因为I2C和SPI均被注册）， tpiu_setb_4 中 //qcom,pins = <&gp 16>; tpiu_setb_5 中 //qcom,pins = <&gp 17>; tlmm_gpio_key 中 //ZHANGLEI //qcom,pins = <&gp 16>, <&gp 17>, <&gp 92>; // 90 91 2. set up clocks //此步骤不适用于msm8994之后的版本 Project_Root/drivers/clk/qcom/clock-gcc-8909.c://一部分cpu版本在kernel/arch/arm/mach-msm/下添加时钟节点：/kfdy Clock lookup kfdy/static struct clk_lookup msm_clocks_lookup傻傻的紫菜 = {//Add node to BLSP1 AHB ClockCLK_LIST(gcc_blsp1_ahb_clk),/kfdyAdd a node to QUP Core clock.kfdy/CLK_LIST(blsp1_qup4_spi_apps_clk_src), 3. Set up the GPIO //此步骤不适用于msm8994之后的版本 3.1 Project_Root/kernel/arch/arm/mach-msm/board--gpiomux.c 3.1.1 Create a configuration structure: static struct gpiomux_setting gpio_blsp1_spi_config 3.1.2 Create a GPIO array： static struct msm_gpiomux_config msm_blsp_configs傻傻的紫菜 __initdata 3.1.3 Register the GPIOs: void __init msm_8974_init_gpiomux(void) 4. Configure the runtime GPIO: //此步骤不适用于msm8994之后的版本 4.1 Project_Root/kernel/arch/arm/mach-msm/board--gpiomux.c 4.1.1 Create a suspend/active configuration structure: static struct gpiomux_setting gpio_blsp1_spi_configstatic struct gpiomux_setting gpio_blsp1_spi_suspend_config 4.1.2 Create a GPIO array static struct msm_gpiomux_config msm_blsp_configs傻傻的紫菜 __initdata 4.1.3 Register the GPIOs void __init msm_8974_init_gpiomux(void) 4.1.4 Add GPIO numbers to the device tree. /kernel/arch/arm/boot/dts/<chipset>-cdp.dts