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Bl808/i2c: create branch for the i2c driver #11

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859ea99
bring branch up to date with bl808/board
Hunter1753 Apr 23, 2023
7443930
add i2c bus driver for bouffalolabs bl808
Hunter1753 Apr 23, 2023
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14 changes: 13 additions & 1 deletion arch/riscv/boot/dts/bouffalolab/bl808-pine64-ox64.dts
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,7 @@

chosen {
stdout-path = "serial0:2000000n8";
bootargs = "console=ttyS0,2000000 loglevel=8 earlycon=sbi root=/dev/mmcblk0p2 rootwait rootfstype=ext4";
bootargs = "console=ttyS0,2000000 loglevel=8 earlycon=sbi root=PARTLABEL=rootfs rootwait rootfstype=ext4";
linux,initrd-start = <0x0 0x52000000>;
linux,initrd-end = <0x0 0x52941784>;
};
Expand All @@ -41,12 +41,24 @@

&pinctrl {
status = "okay";

i2c_2_pins: i2c-pins {
pins = "GPIO6", "GPIO7";
function = "i2c2";
};
};

&seceng {
status = "okay";
};

&i2c2 {
status = "okay";

pinctrl-0 = <&i2c_2_pins>;
pinctrl-names = "default";
};

&uart0 {
status = "okay";
};
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56 changes: 56 additions & 0 deletions arch/riscv/boot/dts/bouffalolab/bl808.dtsi
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Expand Up @@ -52,6 +52,20 @@
#clock-cells = <0>;
};

rc32m: rc32m-clk {
compatible = "fixed-clock";
clock-frequency = <32000000>;
clock-output-names = "rc32m";
#clock-cells = <0>;
};

mm_b: mm_bclk1x {
compatible = "fixed-clock";
clock-frequency = <160000000>;
clock-output-names = "mm_b";
#clock-cells = <0>;
};

enet: enet-clk {
compatible = "fixed-clock";
clock-frequency = <50000000>;
Expand Down Expand Up @@ -97,6 +111,48 @@
status = "disabled";
};

i2c0: i2c@2000A300 {
compatible = "bflb,bl808-i2c";
reg = <0x2000A300 0x0100>;
interrupts-extended = <&ipclic BFLB_IPC_SOURCE_M0
BFLB_IPC_DEVICE_I2C0
IRQ_TYPE_EDGE_RISING>;
mboxes = <&ipclic BFLB_IPC_SOURCE_M0 BFLB_IPC_DEVICE_I2C0>;
clocks = <&rc32m>;
clock-frequency = <400000>;
status = "disabled";
};

i2c1: i2c@2000A900 {
compatible = "bflb,bl808-i2c";
reg = <0x2000A900 0x0100>;
interrupts-extended = <&ipclic BFLB_IPC_SOURCE_M0
BFLB_IPC_DEVICE_I2C1
IRQ_TYPE_EDGE_RISING>;
mboxes = <&ipclic BFLB_IPC_SOURCE_M0 BFLB_IPC_DEVICE_I2C1>;
clocks = <&rc32m>;
clock-frequency = <400000>;
status = "disabled";
};

i2c2: i2c@30003000 {
compatible = "bflb,bl808-i2c";
reg = <0x30003000 0x1000>;
interrupts = <21 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&mm_b>;
clock-frequency = <400000>;
status = "disabled";
};

i2c3: i2c@30004000 {
compatible = "bflb,bl808-i2c";
reg = <0x30004000 0x1000>;
interrupts = <22 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&mm_b>;
clock-frequency = <400000>;
status = "disabled";
};

uart0: serial@30002000 {
compatible = "bflb,bl808-uart";
reg = <0x30002000 0x1000>;
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10 changes: 10 additions & 0 deletions drivers/i2c/busses/Kconfig
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Expand Up @@ -1221,6 +1221,16 @@ config I2C_RCAR
This driver can also be built as a module. If so, the module
will be called i2c-rcar.

config I2C_BL808
tristate "Bouffalo Lab BL808 I2C driver"
depends on SOC_BOUFFALOLAB
help
This driver provides support for the I2C bus
hardware found on Bouffalo Lab BL808 SoCs.

To compile this driver as a module, choose M here. The
module will be called i2c-bl808. If unsure, say N.

comment "External I2C/SMBus adapter drivers"

config I2C_DIOLAN_U2C
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1 change: 1 addition & 0 deletions drivers/i2c/busses/Makefile
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Expand Up @@ -47,6 +47,7 @@ obj-$(CONFIG_I2C_AU1550) += i2c-au1550.o
obj-$(CONFIG_I2C_AXXIA) += i2c-axxia.o
obj-$(CONFIG_I2C_BCM2835) += i2c-bcm2835.o
obj-$(CONFIG_I2C_BCM_IPROC) += i2c-bcm-iproc.o
obj-$(CONFIG_I2C_BL808) += i2c-bl808.o
obj-$(CONFIG_I2C_CADENCE) += i2c-cadence.o
obj-$(CONFIG_I2C_CBUS_GPIO) += i2c-cbus-gpio.o
obj-$(CONFIG_I2C_CPM) += i2c-cpm.o
Expand Down
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