[PATCH v3 0/5] ARM: Add GXP I2C Support

nick.hawkins
2023-01-20T19:04:24Z

The GXP SoC supports 10 I2C engines. Each I2C engine is completely
independent and can function both as an I2C master and I2C slave. The
I2C master can operate in a multi master environment. The engines support
a scalable speed from 8kHZ to 1.5 Mhz.

---

Changes since v2:
*Disable IRQ on a device remove
*Remove use of I2C_CLASS_DEPRECATED
*Use i2c_parse_fw_timings instead of of_property_read_u32
*Remove redundant dev_err_probe as platform_get_irq already has one
*Used __iomem instead of res->start to find physical address
*Use BIT in gxp_i2c_irq_handler
*Made value u8 instead of u16 for u8 read
*Provided a better description of Phandle in yaml
Changes since v1:
*Removed yaml documentation of hpe,gxp-sysreg as it has been
applied to syscon.yaml
*Made i2cX a generic node name i2c in dts file
*Added status field to the dtsi and the dts for i2c bus
*Removed unnecessary size-cells and address-cells from yaml
*Removed phandle from hpe,sysreg-phandle
*Changed hpe,i2c-max-bus-freq to clock-frequency
*Removed rogue tab in structure definition
*Removed use of __iomem *base local variables as it was
unnecessary
*Switched #if IS_ENABLED() -> if (IS_ENABLED()) inside
functions
*Removed use of pr_* functions
*Removed informational prints in register and unregister
functions
*Removed print from interrupt handler
*Removed informational prints from probe function
*Switched dev_err -> dev_err_probe in probe function
*Used the respective helper for mapping the resource to
__iomem

Nick Hawkins (5):
i2c: hpe: Add GXP SoC I2C Controller
dt-bindings: i2c: Add hpe,gxp-i2c
ARM: dts: hpe: Add I2C Topology
ARM: multi_v7_defconfig: add gxp i2c module
MAINTAINERS: Add HPE GXP I2C Support

.../devicetree/bindings/i2c/hpe,gxp-i2c.yaml | 57 ++
MAINTAINERS | 2 +
arch/arm/boot/dts/hpe-bmc-dl360gen10.dts | 109 ++++
arch/arm/boot/dts/hpe-gxp.dtsi | 125 ++++
arch/arm/configs/multi_v7_defconfig | 1 +
drivers/i2c/busses/Kconfig | 7 +
drivers/i2c/busses/Makefile | 1 +
drivers/i2c/busses/i2c-gxp.c | 602 ++++++++++++++++++
8 files changed, 904 insertions(+)
create mode 100644 Documentation/devicetree/bindings/i2c/hpe,gxp-i2c.yaml
create mode 100644 drivers/i2c/busses/i2c-gxp.c

--
2.17.1