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Diffstat (limited to 'dts/Bindings/i2c/i2c-ocores.txt')
-rw-r--r-- | dts/Bindings/i2c/i2c-ocores.txt | 78 |
1 files changed, 0 insertions, 78 deletions
diff --git a/dts/Bindings/i2c/i2c-ocores.txt b/dts/Bindings/i2c/i2c-ocores.txt deleted file mode 100644 index a37c9455b2..0000000000 --- a/dts/Bindings/i2c/i2c-ocores.txt +++ /dev/null @@ -1,78 +0,0 @@ -Device tree configuration for i2c-ocores - -Required properties: -- compatible : "opencores,i2c-ocores" - "aeroflexgaisler,i2cmst" - "sifive,fu540-c000-i2c", "sifive,i2c0" - For Opencore based I2C IP block reimplemented in - FU540-C000 SoC. - "sifive,fu740-c000-i2c", "sifive,i2c0" - For Opencore based I2C IP block reimplemented in - FU740-C000 SoC. - Please refer to sifive-blocks-ip-versioning.txt for - additional details. -- reg : bus address start and address range size of device -- clocks : handle to the controller clock; see the note below. - Mutually exclusive with opencores,ip-clock-frequency -- opencores,ip-clock-frequency: frequency of the controller clock in Hz; - see the note below. Mutually exclusive with clocks -- #address-cells : should be <1> -- #size-cells : should be <0> - -Optional properties: -- interrupts : interrupt number. -- clock-frequency : frequency of bus clock in Hz; see the note below. - Defaults to 100 KHz when the property is not specified -- reg-shift : device register offsets are shifted by this value -- reg-io-width : io register width in bytes (1, 2 or 4) -- regstep : deprecated, use reg-shift above - -Note -clock-frequency property is meant to control the bus frequency for i2c bus -drivers, but it was incorrectly used to specify i2c controller input clock -frequency. So the following rules are set to fix this situation: -- if clock-frequency is present and neither opencores,ip-clock-frequency nor - clocks are, then clock-frequency specifies i2c controller clock frequency. - This is to keep backwards compatibility with setups using old DTB. i2c bus - frequency is fixed at 100 KHz. -- if clocks is present it specifies i2c controller clock. clock-frequency - property specifies i2c bus frequency. -- if opencores,ip-clock-frequency is present it specifies i2c controller - clock frequency. clock-frequency property specifies i2c bus frequency. - -Examples: - - i2c0: ocores@a0000000 { - #address-cells = <1>; - #size-cells = <0>; - compatible = "opencores,i2c-ocores"; - reg = <0xa0000000 0x8>; - interrupts = <10>; - opencores,ip-clock-frequency = <20000000>; - - reg-shift = <0>; /* 8 bit registers */ - reg-io-width = <1>; /* 8 bit read/write */ - - dummy@60 { - compatible = "dummy"; - reg = <0x60>; - }; - }; -or - i2c0: ocores@a0000000 { - #address-cells = <1>; - #size-cells = <0>; - compatible = "opencores,i2c-ocores"; - reg = <0xa0000000 0x8>; - interrupts = <10>; - clocks = <&osc>; - clock-frequency = <400000>; /* i2c bus frequency 400 KHz */ - - reg-shift = <0>; /* 8 bit registers */ - reg-io-width = <1>; /* 8 bit read/write */ - - dummy@60 { - compatible = "dummy"; - reg = <0x60>; - }; - }; |