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i2c: uniphier_f: add UniPhier FIFO-builtin I2C driver

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Add support for on-chip I2C controller used on newer UniPhier SoCs
such as PH1-Pro4, PH1-Pro5, etc.  This adapter is equipped with
8-depth TX/RX FIFOs.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Masahiro Yamada
2015-10-23 19:52:00 +09:00
committed by Wolfram Sang
parent dd6fd4a327
commit 6a62974b66
4 changed files with 618 additions and 0 deletions
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Documentation/devicetree/bindings/i2c/i2c-uniphier-f.txt
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@@ -0,0 +1,25 @@
UniPhier I2C controller (FIFO-builtin)
Required properties:
- compatible: should be "socionext,uniphier-fi2c".
- #address-cells: should be 1.
- #size-cells: should be 0.
- reg: offset and length of the register set for the device.
- interrupts: a single interrupt specifier.
- clocks: phandle to the input clock.
Optional properties:
- clock-frequency: desired I2C bus frequency in Hz. The maximum supported
value is 400000. Defaults to 100000 if not specified.
Examples:
i2c0: i2c@58780000 {
compatible = "socionext,uniphier-fi2c";
reg = <0x58780000 0x80>;
#address-cells = <1>;
#size-cells = <0>;
interrupts = <0 41 4>;
clocks = <&i2c_clk>;
clock-frequency = <100000>;
};
drivers/i2c/busses/Kconfig
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@@ -910,6 +910,14 @@ config I2C_UNIPHIER
the UniPhier FIFO-less I2C interface embedded in PH1-LD4, PH1-sLD8,
or older UniPhier SoCs.
config I2C_UNIPHIER_F
tristate "UniPhier FIFO-builtin I2C controller"
depends on ARCH_UNIPHIER
help
If you say yes to this option, support will be included for
the UniPhier FIFO-builtin I2C interface embedded in PH1-Pro4,
PH1-Pro5, or newer UniPhier SoCs.
config I2C_VERSATILE
tristate "ARM Versatile/Realview I2C bus support"
depends on ARCH_VERSATILE || ARCH_REALVIEW || ARCH_VEXPRESS
drivers/i2c/busses/Makefile
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@@ -88,6 +88,7 @@ obj-$(CONFIG_I2C_STU300) += i2c-stu300.o
obj-$(CONFIG_I2C_SUN6I_P2WI) += i2c-sun6i-p2wi.o
obj-$(CONFIG_I2C_TEGRA) += i2c-tegra.o
obj-$(CONFIG_I2C_UNIPHIER) += i2c-uniphier.o
obj-$(CONFIG_I2C_UNIPHIER_F) += i2c-uniphier-f.o
obj-$(CONFIG_I2C_VERSATILE) += i2c-versatile.o
obj-$(CONFIG_I2C_WMT) += i2c-wmt.o
obj-$(CONFIG_I2C_OCTEON) += i2c-octeon.o
drivers/i2c/busses/i2c-uniphier-f.c
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