From 23c2556d8fbec57e72e2c8fd8b7be2715c192b25 Mon Sep 17 00:00:00 2001 From: Simon Horman Date: Wed, 24 Jul 2019 14:15:56 +0200 Subject: dt-bindings: i2c: sh_mobile: Rename bindings documentation file Rename the bindings documentation file for sh_mobile I2C controller from i2c-sh_mobile.txt to renesas,iic.txt. This is part of an ongoing effort to name bindings documentation files for Renesas IP blocks consistently, in line with the compat strings they document. Signed-off-by: Simon Horman Reviewed-by: Geert Uytterhoeven Signed-off-by: Wolfram Sang --- MAINTAINERS | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'MAINTAINERS') diff --git a/MAINTAINERS b/MAINTAINERS index 6426db5198f0..c8a78239447a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13651,7 +13651,7 @@ RENESAS R-CAR I2C DRIVERS M: Wolfram Sang S: Supported F: Documentation/devicetree/bindings/i2c/i2c-rcar.txt -F: Documentation/devicetree/bindings/i2c/i2c-sh_mobile.txt +F: Documentation/devicetree/bindings/i2c/renesas,iic.txt F: drivers/i2c/busses/i2c-rcar.c F: drivers/i2c/busses/i2c-sh_mobile.c -- cgit v1.2.3 From d13ed84b195cc6e5789b446f07aede357939f7ad Mon Sep 17 00:00:00 2001 From: Simon Horman Date: Wed, 24 Jul 2019 14:15:57 +0200 Subject: dt-bindings: i2c: rcar: Rename bindings documentation file Rename the bindings documentation file for R-Car I2C controller from i2c-rcar.txt to renesas,rcar.txt. This is part of an ongoing effort to name bindings documentation files for Renesas IP blocks consistently, in line with the compat strings they document. Signed-off-by: Simon Horman Reviewed-by: Geert Uytterhoeven Signed-off-by: Wolfram Sang --- Documentation/devicetree/bindings/i2c/i2c-rcar.txt | 62 ---------------------- .../devicetree/bindings/i2c/renesas,i2c.txt | 62 ++++++++++++++++++++++ MAINTAINERS | 2 +- 3 files changed, 63 insertions(+), 63 deletions(-) delete mode 100644 Documentation/devicetree/bindings/i2c/i2c-rcar.txt create mode 100644 Documentation/devicetree/bindings/i2c/renesas,i2c.txt (limited to 'MAINTAINERS') diff --git a/Documentation/devicetree/bindings/i2c/i2c-rcar.txt b/Documentation/devicetree/bindings/i2c/i2c-rcar.txt deleted file mode 100644 index 3ee5e8f6ee01..000000000000 --- a/Documentation/devicetree/bindings/i2c/i2c-rcar.txt +++ /dev/null @@ -1,62 +0,0 @@ -I2C for R-Car platforms - -Required properties: -- compatible: - "renesas,i2c-r8a7743" if the device is a part of a R8A7743 SoC. - "renesas,i2c-r8a7744" if the device is a part of a R8A7744 SoC. - "renesas,i2c-r8a7745" if the device is a part of a R8A7745 SoC. - "renesas,i2c-r8a77470" if the device is a part of a R8A77470 SoC. - "renesas,i2c-r8a774a1" if the device is a part of a R8A774A1 SoC. - "renesas,i2c-r8a774c0" if the device is a part of a R8A774C0 SoC. - "renesas,i2c-r8a7778" if the device is a part of a R8A7778 SoC. - "renesas,i2c-r8a7779" if the device is a part of a R8A7779 SoC. - "renesas,i2c-r8a7790" if the device is a part of a R8A7790 SoC. - "renesas,i2c-r8a7791" if the device is a part of a R8A7791 SoC. - "renesas,i2c-r8a7792" if the device is a part of a R8A7792 SoC. - "renesas,i2c-r8a7793" if the device is a part of a R8A7793 SoC. - "renesas,i2c-r8a7794" if the device is a part of a R8A7794 SoC. - "renesas,i2c-r8a7795" if the device is a part of a R8A7795 SoC. - "renesas,i2c-r8a7796" if the device is a part of a R8A7796 SoC. - "renesas,i2c-r8a77965" if the device is a part of a R8A77965 SoC. - "renesas,i2c-r8a77970" if the device is a part of a R8A77970 SoC. - "renesas,i2c-r8a77980" if the device is a part of a R8A77980 SoC. - "renesas,i2c-r8a77990" if the device is a part of a R8A77990 SoC. - "renesas,i2c-r8a77995" if the device is a part of a R8A77995 SoC. - "renesas,rcar-gen1-i2c" for a generic R-Car Gen1 compatible device. - "renesas,rcar-gen2-i2c" for a generic R-Car Gen2 or RZ/G1 compatible - device. - "renesas,rcar-gen3-i2c" for a generic R-Car Gen3 or RZ/G2 compatible - device. - "renesas,i2c-rcar" (deprecated) - - When compatible with the generic version, nodes must list the - SoC-specific version corresponding to the platform first followed - by the generic version. - -- reg: physical base address of the controller and length of memory mapped - region. -- interrupts: interrupt specifier. - -Optional properties: -- clock-frequency: desired I2C bus clock frequency in Hz. The absence of this - property indicates the default frequency 100 kHz. -- clocks: clock specifier. -- dmas: Must contain a list of two references to DMA specifiers, one for - transmission, and one for reception. -- dma-names: Must contain a list of two DMA names, "tx" and "rx". - -- i2c-scl-falling-time-ns: see i2c.txt -- i2c-scl-internal-delay-ns: see i2c.txt -- i2c-scl-rising-time-ns: see i2c.txt - -Examples : - -i2c0: i2c@e6508000 { - #address-cells = <1>; - #size-cells = <0>; - compatible = "renesas,i2c-r8a7791", "renesas,rcar-gen2-i2c"; - reg = <0 0xe6508000 0 0x40>; - interrupts = <0 287 IRQ_TYPE_LEVEL_HIGH>; - clocks = <&mstp9_clks R8A7791_CLK_I2C0>; - clock-frequency = <400000>; -}; diff --git a/Documentation/devicetree/bindings/i2c/renesas,i2c.txt b/Documentation/devicetree/bindings/i2c/renesas,i2c.txt new file mode 100644 index 000000000000..3ee5e8f6ee01 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/renesas,i2c.txt @@ -0,0 +1,62 @@ +I2C for R-Car platforms + +Required properties: +- compatible: + "renesas,i2c-r8a7743" if the device is a part of a R8A7743 SoC. + "renesas,i2c-r8a7744" if the device is a part of a R8A7744 SoC. + "renesas,i2c-r8a7745" if the device is a part of a R8A7745 SoC. + "renesas,i2c-r8a77470" if the device is a part of a R8A77470 SoC. + "renesas,i2c-r8a774a1" if the device is a part of a R8A774A1 SoC. + "renesas,i2c-r8a774c0" if the device is a part of a R8A774C0 SoC. + "renesas,i2c-r8a7778" if the device is a part of a R8A7778 SoC. + "renesas,i2c-r8a7779" if the device is a part of a R8A7779 SoC. + "renesas,i2c-r8a7790" if the device is a part of a R8A7790 SoC. + "renesas,i2c-r8a7791" if the device is a part of a R8A7791 SoC. + "renesas,i2c-r8a7792" if the device is a part of a R8A7792 SoC. + "renesas,i2c-r8a7793" if the device is a part of a R8A7793 SoC. + "renesas,i2c-r8a7794" if the device is a part of a R8A7794 SoC. + "renesas,i2c-r8a7795" if the device is a part of a R8A7795 SoC. + "renesas,i2c-r8a7796" if the device is a part of a R8A7796 SoC. + "renesas,i2c-r8a77965" if the device is a part of a R8A77965 SoC. + "renesas,i2c-r8a77970" if the device is a part of a R8A77970 SoC. + "renesas,i2c-r8a77980" if the device is a part of a R8A77980 SoC. + "renesas,i2c-r8a77990" if the device is a part of a R8A77990 SoC. + "renesas,i2c-r8a77995" if the device is a part of a R8A77995 SoC. + "renesas,rcar-gen1-i2c" for a generic R-Car Gen1 compatible device. + "renesas,rcar-gen2-i2c" for a generic R-Car Gen2 or RZ/G1 compatible + device. + "renesas,rcar-gen3-i2c" for a generic R-Car Gen3 or RZ/G2 compatible + device. + "renesas,i2c-rcar" (deprecated) + + When compatible with the generic version, nodes must list the + SoC-specific version corresponding to the platform first followed + by the generic version. + +- reg: physical base address of the controller and length of memory mapped + region. +- interrupts: interrupt specifier. + +Optional properties: +- clock-frequency: desired I2C bus clock frequency in Hz. The absence of this + property indicates the default frequency 100 kHz. +- clocks: clock specifier. +- dmas: Must contain a list of two references to DMA specifiers, one for + transmission, and one for reception. +- dma-names: Must contain a list of two DMA names, "tx" and "rx". + +- i2c-scl-falling-time-ns: see i2c.txt +- i2c-scl-internal-delay-ns: see i2c.txt +- i2c-scl-rising-time-ns: see i2c.txt + +Examples : + +i2c0: i2c@e6508000 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "renesas,i2c-r8a7791", "renesas,rcar-gen2-i2c"; + reg = <0 0xe6508000 0 0x40>; + interrupts = <0 287 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&mstp9_clks R8A7791_CLK_I2C0>; + clock-frequency = <400000>; +}; diff --git a/MAINTAINERS b/MAINTAINERS index c8a78239447a..f92a88594dfc 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13650,7 +13650,7 @@ F: drivers/iio/adc/rcar-gyroadc.c RENESAS R-CAR I2C DRIVERS M: Wolfram Sang S: Supported -F: Documentation/devicetree/bindings/i2c/i2c-rcar.txt +F: Documentation/devicetree/bindings/i2c/renesas,i2c.txt F: Documentation/devicetree/bindings/i2c/renesas,iic.txt F: drivers/i2c/busses/i2c-rcar.c F: drivers/i2c/busses/i2c-sh_mobile.c -- cgit v1.2.3 From 1d583590514a4f1c9aa582d1234fca7aa3d627e9 Mon Sep 17 00:00:00 2001 From: Simon Horman Date: Wed, 24 Jul 2019 14:15:58 +0200 Subject: dt-bindings: i2c: riic: Rename bindings documentation file Rename the bindings documentation file for RIIC controller from i2c-riic.txt to renesas,riic.txt. This is part of an ongoing effort to name bindings documentation files for Renesas IP blocks consistently, in line with the compat strings they document. Signed-off-by: Simon Horman Reviewed-by: Geert Uytterhoeven Signed-off-by: Wolfram Sang --- Documentation/devicetree/bindings/i2c/i2c-riic.txt | 32 ---------------------- .../devicetree/bindings/i2c/renesas,riic.txt | 32 ++++++++++++++++++++++ MAINTAINERS | 2 +- 3 files changed, 33 insertions(+), 33 deletions(-) delete mode 100644 Documentation/devicetree/bindings/i2c/i2c-riic.txt create mode 100644 Documentation/devicetree/bindings/i2c/renesas,riic.txt (limited to 'MAINTAINERS') diff --git a/Documentation/devicetree/bindings/i2c/i2c-riic.txt b/Documentation/devicetree/bindings/i2c/i2c-riic.txt deleted file mode 100644 index e26fe3ad86a9..000000000000 --- a/Documentation/devicetree/bindings/i2c/i2c-riic.txt +++ /dev/null @@ -1,32 +0,0 @@ -Device tree configuration for Renesas RIIC driver - -Required properties: -- compatible : - "renesas,riic-r7s72100" if the device is a part of a R7S72100 SoC. - "renesas,riic-r7s9210" if the device is a part of a R7S9210 SoC. - "renesas,riic-rz" for a generic RZ/A compatible device. -- reg : address start and address range size of device -- interrupts : 8 interrupts (TEI, RI, TI, SPI, STI, NAKI, ALI, TMOI) -- clock-frequency : frequency of bus clock in Hz -- #address-cells : should be <1> -- #size-cells : should be <0> - -Pinctrl properties might be needed, too. See there. - -Example: - - i2c0: i2c@fcfee000 { - compatible = "renesas,riic-r7s72100", "renesas,riic-rz"; - reg = <0xfcfee000 0x44>; - interrupts = <0 157 IRQ_TYPE_LEVEL_HIGH>, - <0 158 IRQ_TYPE_EDGE_RISING>, - <0 159 IRQ_TYPE_EDGE_RISING>, - <0 160 IRQ_TYPE_LEVEL_HIGH>, - <0 161 IRQ_TYPE_LEVEL_HIGH>, - <0 162 IRQ_TYPE_LEVEL_HIGH>, - <0 163 IRQ_TYPE_LEVEL_HIGH>, - <0 164 IRQ_TYPE_LEVEL_HIGH>; - clock-frequency = <100000>; - #address-cells = <1>; - #size-cells = <0>; - }; diff --git a/Documentation/devicetree/bindings/i2c/renesas,riic.txt b/Documentation/devicetree/bindings/i2c/renesas,riic.txt new file mode 100644 index 000000000000..e26fe3ad86a9 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/renesas,riic.txt @@ -0,0 +1,32 @@ +Device tree configuration for Renesas RIIC driver + +Required properties: +- compatible : + "renesas,riic-r7s72100" if the device is a part of a R7S72100 SoC. + "renesas,riic-r7s9210" if the device is a part of a R7S9210 SoC. + "renesas,riic-rz" for a generic RZ/A compatible device. +- reg : address start and address range size of device +- interrupts : 8 interrupts (TEI, RI, TI, SPI, STI, NAKI, ALI, TMOI) +- clock-frequency : frequency of bus clock in Hz +- #address-cells : should be <1> +- #size-cells : should be <0> + +Pinctrl properties might be needed, too. See there. + +Example: + + i2c0: i2c@fcfee000 { + compatible = "renesas,riic-r7s72100", "renesas,riic-rz"; + reg = <0xfcfee000 0x44>; + interrupts = <0 157 IRQ_TYPE_LEVEL_HIGH>, + <0 158 IRQ_TYPE_EDGE_RISING>, + <0 159 IRQ_TYPE_EDGE_RISING>, + <0 160 IRQ_TYPE_LEVEL_HIGH>, + <0 161 IRQ_TYPE_LEVEL_HIGH>, + <0 162 IRQ_TYPE_LEVEL_HIGH>, + <0 163 IRQ_TYPE_LEVEL_HIGH>, + <0 164 IRQ_TYPE_LEVEL_HIGH>; + clock-frequency = <100000>; + #address-cells = <1>; + #size-cells = <0>; + }; diff --git a/MAINTAINERS b/MAINTAINERS index f92a88594dfc..a14ce44c33b3 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13658,7 +13658,7 @@ F: drivers/i2c/busses/i2c-sh_mobile.c RENESAS RIIC DRIVER M: Chris Brandt S: Supported -F: Documentation/devicetree/bindings/i2c/i2c-riic.txt +F: Documentation/devicetree/bindings/i2c/renesas,riic.txt F: drivers/i2c/busses/i2c-riic.c RENESAS USB PHY DRIVER -- cgit v1.2.3 From 684ca71259a69c5a3019da72fe718bf983841926 Mon Sep 17 00:00:00 2001 From: Simon Horman Date: Wed, 24 Jul 2019 14:15:59 +0200 Subject: dt-bindings: i2c: riic: Rename bindings documentation file Rename the bindings documentation file for Renesas EMEV2 IIC controller from i2c-emev2.txt to renesas,iic-emev2.txt. This is part of an ongoing effort to name bindings documentation files for Renesas IP blocks consistently, in line with the compat strings they document. Signed-off-by: Simon Horman Reviewed-by: Geert Uytterhoeven Signed-off-by: Wolfram Sang --- .../devicetree/bindings/i2c/i2c-emev2.txt | 22 ---------------------- .../devicetree/bindings/i2c/renesas,iic-emev2.txt | 22 ++++++++++++++++++++++ MAINTAINERS | 2 +- 3 files changed, 23 insertions(+), 23 deletions(-) delete mode 100644 Documentation/devicetree/bindings/i2c/i2c-emev2.txt create mode 100644 Documentation/devicetree/bindings/i2c/renesas,iic-emev2.txt (limited to 'MAINTAINERS') diff --git a/Documentation/devicetree/bindings/i2c/i2c-emev2.txt b/Documentation/devicetree/bindings/i2c/i2c-emev2.txt deleted file mode 100644 index 5ed1ea1c7e14..000000000000 --- a/Documentation/devicetree/bindings/i2c/i2c-emev2.txt +++ /dev/null @@ -1,22 +0,0 @@ -Device tree configuration for Renesas EMEV2 IIC controller - -Required properties: -- compatible : "renesas,iic-emev2" -- reg : address start and address range size of device -- interrupts : specifier for the IIC controller interrupt -- clocks : phandle to the IP core SCLK -- clock-names : must be "sclk" -- #address-cells : should be <1> -- #size-cells : should be <0> - -Example: - - iic0: i2c@e0070000 { - #address-cells = <1>; - #size-cells = <0>; - compatible = "renesas,iic-emev2"; - reg = <0xe0070000 0x28>; - interrupts = <0 32 IRQ_TYPE_EDGE_RISING>; - clocks = <&iic0_sclk>; - clock-names = "sclk"; - }; diff --git a/Documentation/devicetree/bindings/i2c/renesas,iic-emev2.txt b/Documentation/devicetree/bindings/i2c/renesas,iic-emev2.txt new file mode 100644 index 000000000000..5ed1ea1c7e14 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/renesas,iic-emev2.txt @@ -0,0 +1,22 @@ +Device tree configuration for Renesas EMEV2 IIC controller + +Required properties: +- compatible : "renesas,iic-emev2" +- reg : address start and address range size of device +- interrupts : specifier for the IIC controller interrupt +- clocks : phandle to the IP core SCLK +- clock-names : must be "sclk" +- #address-cells : should be <1> +- #size-cells : should be <0> + +Example: + + iic0: i2c@e0070000 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "renesas,iic-emev2"; + reg = <0xe0070000 0x28>; + interrupts = <0 32 IRQ_TYPE_EDGE_RISING>; + clocks = <&iic0_sclk>; + clock-names = "sclk"; + }; diff --git a/MAINTAINERS b/MAINTAINERS index a14ce44c33b3..f89f27a2d09a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13628,7 +13628,7 @@ F: drivers/clk/renesas/ RENESAS EMEV2 I2C DRIVER M: Wolfram Sang S: Supported -F: Documentation/devicetree/bindings/i2c/i2c-emev2.txt +F: Documentation/devicetree/bindings/i2c/renesas,iic-emev2.txt F: drivers/i2c/busses/i2c-emev2.c RENESAS ETHERNET DRIVERS -- cgit v1.2.3 From f29b7f39c0acbc66f18309227719460adab6851d Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Tue, 6 Aug 2019 22:17:51 +0200 Subject: Revert "dt-bindings: i2c: rcar: Rename bindings documentation file" This reverts commit d13ed84b195cc6e5789b446f07aede357939f7ad. I overlooked that the Rev-by tag was given in advance assuming a fix was made for the next revision. Signed-off-by: Wolfram Sang --- Documentation/devicetree/bindings/i2c/i2c-rcar.txt | 62 ++++++++++++++++++++++ .../devicetree/bindings/i2c/renesas,i2c.txt | 62 ---------------------- MAINTAINERS | 2 +- 3 files changed, 63 insertions(+), 63 deletions(-) create mode 100644 Documentation/devicetree/bindings/i2c/i2c-rcar.txt delete mode 100644 Documentation/devicetree/bindings/i2c/renesas,i2c.txt (limited to 'MAINTAINERS') diff --git a/Documentation/devicetree/bindings/i2c/i2c-rcar.txt b/Documentation/devicetree/bindings/i2c/i2c-rcar.txt new file mode 100644 index 000000000000..3ee5e8f6ee01 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/i2c-rcar.txt @@ -0,0 +1,62 @@ +I2C for R-Car platforms + +Required properties: +- compatible: + "renesas,i2c-r8a7743" if the device is a part of a R8A7743 SoC. + "renesas,i2c-r8a7744" if the device is a part of a R8A7744 SoC. + "renesas,i2c-r8a7745" if the device is a part of a R8A7745 SoC. + "renesas,i2c-r8a77470" if the device is a part of a R8A77470 SoC. + "renesas,i2c-r8a774a1" if the device is a part of a R8A774A1 SoC. + "renesas,i2c-r8a774c0" if the device is a part of a R8A774C0 SoC. + "renesas,i2c-r8a7778" if the device is a part of a R8A7778 SoC. + "renesas,i2c-r8a7779" if the device is a part of a R8A7779 SoC. + "renesas,i2c-r8a7790" if the device is a part of a R8A7790 SoC. + "renesas,i2c-r8a7791" if the device is a part of a R8A7791 SoC. + "renesas,i2c-r8a7792" if the device is a part of a R8A7792 SoC. + "renesas,i2c-r8a7793" if the device is a part of a R8A7793 SoC. + "renesas,i2c-r8a7794" if the device is a part of a R8A7794 SoC. + "renesas,i2c-r8a7795" if the device is a part of a R8A7795 SoC. + "renesas,i2c-r8a7796" if the device is a part of a R8A7796 SoC. + "renesas,i2c-r8a77965" if the device is a part of a R8A77965 SoC. + "renesas,i2c-r8a77970" if the device is a part of a R8A77970 SoC. + "renesas,i2c-r8a77980" if the device is a part of a R8A77980 SoC. + "renesas,i2c-r8a77990" if the device is a part of a R8A77990 SoC. + "renesas,i2c-r8a77995" if the device is a part of a R8A77995 SoC. + "renesas,rcar-gen1-i2c" for a generic R-Car Gen1 compatible device. + "renesas,rcar-gen2-i2c" for a generic R-Car Gen2 or RZ/G1 compatible + device. + "renesas,rcar-gen3-i2c" for a generic R-Car Gen3 or RZ/G2 compatible + device. + "renesas,i2c-rcar" (deprecated) + + When compatible with the generic version, nodes must list the + SoC-specific version corresponding to the platform first followed + by the generic version. + +- reg: physical base address of the controller and length of memory mapped + region. +- interrupts: interrupt specifier. + +Optional properties: +- clock-frequency: desired I2C bus clock frequency in Hz. The absence of this + property indicates the default frequency 100 kHz. +- clocks: clock specifier. +- dmas: Must contain a list of two references to DMA specifiers, one for + transmission, and one for reception. +- dma-names: Must contain a list of two DMA names, "tx" and "rx". + +- i2c-scl-falling-time-ns: see i2c.txt +- i2c-scl-internal-delay-ns: see i2c.txt +- i2c-scl-rising-time-ns: see i2c.txt + +Examples : + +i2c0: i2c@e6508000 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "renesas,i2c-r8a7791", "renesas,rcar-gen2-i2c"; + reg = <0 0xe6508000 0 0x40>; + interrupts = <0 287 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&mstp9_clks R8A7791_CLK_I2C0>; + clock-frequency = <400000>; +}; diff --git a/Documentation/devicetree/bindings/i2c/renesas,i2c.txt b/Documentation/devicetree/bindings/i2c/renesas,i2c.txt deleted file mode 100644 index 3ee5e8f6ee01..000000000000 --- a/Documentation/devicetree/bindings/i2c/renesas,i2c.txt +++ /dev/null @@ -1,62 +0,0 @@ -I2C for R-Car platforms - -Required properties: -- compatible: - "renesas,i2c-r8a7743" if the device is a part of a R8A7743 SoC. - "renesas,i2c-r8a7744" if the device is a part of a R8A7744 SoC. - "renesas,i2c-r8a7745" if the device is a part of a R8A7745 SoC. - "renesas,i2c-r8a77470" if the device is a part of a R8A77470 SoC. - "renesas,i2c-r8a774a1" if the device is a part of a R8A774A1 SoC. - "renesas,i2c-r8a774c0" if the device is a part of a R8A774C0 SoC. - "renesas,i2c-r8a7778" if the device is a part of a R8A7778 SoC. - "renesas,i2c-r8a7779" if the device is a part of a R8A7779 SoC. - "renesas,i2c-r8a7790" if the device is a part of a R8A7790 SoC. - "renesas,i2c-r8a7791" if the device is a part of a R8A7791 SoC. - "renesas,i2c-r8a7792" if the device is a part of a R8A7792 SoC. - "renesas,i2c-r8a7793" if the device is a part of a R8A7793 SoC. - "renesas,i2c-r8a7794" if the device is a part of a R8A7794 SoC. - "renesas,i2c-r8a7795" if the device is a part of a R8A7795 SoC. - "renesas,i2c-r8a7796" if the device is a part of a R8A7796 SoC. - "renesas,i2c-r8a77965" if the device is a part of a R8A77965 SoC. - "renesas,i2c-r8a77970" if the device is a part of a R8A77970 SoC. - "renesas,i2c-r8a77980" if the device is a part of a R8A77980 SoC. - "renesas,i2c-r8a77990" if the device is a part of a R8A77990 SoC. - "renesas,i2c-r8a77995" if the device is a part of a R8A77995 SoC. - "renesas,rcar-gen1-i2c" for a generic R-Car Gen1 compatible device. - "renesas,rcar-gen2-i2c" for a generic R-Car Gen2 or RZ/G1 compatible - device. - "renesas,rcar-gen3-i2c" for a generic R-Car Gen3 or RZ/G2 compatible - device. - "renesas,i2c-rcar" (deprecated) - - When compatible with the generic version, nodes must list the - SoC-specific version corresponding to the platform first followed - by the generic version. - -- reg: physical base address of the controller and length of memory mapped - region. -- interrupts: interrupt specifier. - -Optional properties: -- clock-frequency: desired I2C bus clock frequency in Hz. The absence of this - property indicates the default frequency 100 kHz. -- clocks: clock specifier. -- dmas: Must contain a list of two references to DMA specifiers, one for - transmission, and one for reception. -- dma-names: Must contain a list of two DMA names, "tx" and "rx". - -- i2c-scl-falling-time-ns: see i2c.txt -- i2c-scl-internal-delay-ns: see i2c.txt -- i2c-scl-rising-time-ns: see i2c.txt - -Examples : - -i2c0: i2c@e6508000 { - #address-cells = <1>; - #size-cells = <0>; - compatible = "renesas,i2c-r8a7791", "renesas,rcar-gen2-i2c"; - reg = <0 0xe6508000 0 0x40>; - interrupts = <0 287 IRQ_TYPE_LEVEL_HIGH>; - clocks = <&mstp9_clks R8A7791_CLK_I2C0>; - clock-frequency = <400000>; -}; diff --git a/MAINTAINERS b/MAINTAINERS index f89f27a2d09a..119d2542c897 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13650,7 +13650,7 @@ F: drivers/iio/adc/rcar-gyroadc.c RENESAS R-CAR I2C DRIVERS M: Wolfram Sang S: Supported -F: Documentation/devicetree/bindings/i2c/renesas,i2c.txt +F: Documentation/devicetree/bindings/i2c/i2c-rcar.txt F: Documentation/devicetree/bindings/i2c/renesas,iic.txt F: drivers/i2c/busses/i2c-rcar.c F: drivers/i2c/busses/i2c-sh_mobile.c -- cgit v1.2.3 From e611ee0b3b06b4d28216567a251e4de46e595b5d Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Tue, 6 Aug 2019 22:19:32 +0200 Subject: Revert "dt-bindings: i2c: riic: Rename bindings documentation file" This reverts commit 684ca71259a69c5a3019da72fe718bf983841926. I overlooked that the Rev-by tag was given in advance assuming a fix was made for the next revision. Signed-off-by: Wolfram Sang --- .../devicetree/bindings/i2c/i2c-emev2.txt | 22 ++++++++++++++++++++++ .../devicetree/bindings/i2c/renesas,iic-emev2.txt | 22 ---------------------- MAINTAINERS | 2 +- 3 files changed, 23 insertions(+), 23 deletions(-) create mode 100644 Documentation/devicetree/bindings/i2c/i2c-emev2.txt delete mode 100644 Documentation/devicetree/bindings/i2c/renesas,iic-emev2.txt (limited to 'MAINTAINERS') diff --git a/Documentation/devicetree/bindings/i2c/i2c-emev2.txt b/Documentation/devicetree/bindings/i2c/i2c-emev2.txt new file mode 100644 index 000000000000..5ed1ea1c7e14 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/i2c-emev2.txt @@ -0,0 +1,22 @@ +Device tree configuration for Renesas EMEV2 IIC controller + +Required properties: +- compatible : "renesas,iic-emev2" +- reg : address start and address range size of device +- interrupts : specifier for the IIC controller interrupt +- clocks : phandle to the IP core SCLK +- clock-names : must be "sclk" +- #address-cells : should be <1> +- #size-cells : should be <0> + +Example: + + iic0: i2c@e0070000 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "renesas,iic-emev2"; + reg = <0xe0070000 0x28>; + interrupts = <0 32 IRQ_TYPE_EDGE_RISING>; + clocks = <&iic0_sclk>; + clock-names = "sclk"; + }; diff --git a/Documentation/devicetree/bindings/i2c/renesas,iic-emev2.txt b/Documentation/devicetree/bindings/i2c/renesas,iic-emev2.txt deleted file mode 100644 index 5ed1ea1c7e14..000000000000 --- a/Documentation/devicetree/bindings/i2c/renesas,iic-emev2.txt +++ /dev/null @@ -1,22 +0,0 @@ -Device tree configuration for Renesas EMEV2 IIC controller - -Required properties: -- compatible : "renesas,iic-emev2" -- reg : address start and address range size of device -- interrupts : specifier for the IIC controller interrupt -- clocks : phandle to the IP core SCLK -- clock-names : must be "sclk" -- #address-cells : should be <1> -- #size-cells : should be <0> - -Example: - - iic0: i2c@e0070000 { - #address-cells = <1>; - #size-cells = <0>; - compatible = "renesas,iic-emev2"; - reg = <0xe0070000 0x28>; - interrupts = <0 32 IRQ_TYPE_EDGE_RISING>; - clocks = <&iic0_sclk>; - clock-names = "sclk"; - }; diff --git a/MAINTAINERS b/MAINTAINERS index 119d2542c897..b49db5ad0b64 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13628,7 +13628,7 @@ F: drivers/clk/renesas/ RENESAS EMEV2 I2C DRIVER M: Wolfram Sang S: Supported -F: Documentation/devicetree/bindings/i2c/renesas,iic-emev2.txt +F: Documentation/devicetree/bindings/i2c/i2c-emev2.txt F: drivers/i2c/busses/i2c-emev2.c RENESAS ETHERNET DRIVERS -- cgit v1.2.3 From 4e4521f76ff96f83561555f76c50d25314320d10 Mon Sep 17 00:00:00 2001 From: Simon Horman Date: Fri, 9 Aug 2019 14:30:02 -0700 Subject: dt-bindings: i2c: rcar: Rename bindings documentation file Rename the bindings documentation file for R-Car I2C controller from i2c-rcar.txt to renesas,i2c.txt. This is part of an ongoing effort to name bindings documentation files for Renesas IP blocks consistently, in line with the compat strings they document. Signed-off-by: Simon Horman Reviewed-by: Geert Uytterhoeven Signed-off-by: Wolfram Sang --- Documentation/devicetree/bindings/i2c/i2c-rcar.txt | 62 ---------------------- .../devicetree/bindings/i2c/renesas,i2c.txt | 62 ++++++++++++++++++++++ MAINTAINERS | 2 +- 3 files changed, 63 insertions(+), 63 deletions(-) delete mode 100644 Documentation/devicetree/bindings/i2c/i2c-rcar.txt create mode 100644 Documentation/devicetree/bindings/i2c/renesas,i2c.txt (limited to 'MAINTAINERS') diff --git a/Documentation/devicetree/bindings/i2c/i2c-rcar.txt b/Documentation/devicetree/bindings/i2c/i2c-rcar.txt deleted file mode 100644 index 3ee5e8f6ee01..000000000000 --- a/Documentation/devicetree/bindings/i2c/i2c-rcar.txt +++ /dev/null @@ -1,62 +0,0 @@ -I2C for R-Car platforms - -Required properties: -- compatible: - "renesas,i2c-r8a7743" if the device is a part of a R8A7743 SoC. - "renesas,i2c-r8a7744" if the device is a part of a R8A7744 SoC. - "renesas,i2c-r8a7745" if the device is a part of a R8A7745 SoC. - "renesas,i2c-r8a77470" if the device is a part of a R8A77470 SoC. - "renesas,i2c-r8a774a1" if the device is a part of a R8A774A1 SoC. - "renesas,i2c-r8a774c0" if the device is a part of a R8A774C0 SoC. - "renesas,i2c-r8a7778" if the device is a part of a R8A7778 SoC. - "renesas,i2c-r8a7779" if the device is a part of a R8A7779 SoC. - "renesas,i2c-r8a7790" if the device is a part of a R8A7790 SoC. - "renesas,i2c-r8a7791" if the device is a part of a R8A7791 SoC. - "renesas,i2c-r8a7792" if the device is a part of a R8A7792 SoC. - "renesas,i2c-r8a7793" if the device is a part of a R8A7793 SoC. - "renesas,i2c-r8a7794" if the device is a part of a R8A7794 SoC. - "renesas,i2c-r8a7795" if the device is a part of a R8A7795 SoC. - "renesas,i2c-r8a7796" if the device is a part of a R8A7796 SoC. - "renesas,i2c-r8a77965" if the device is a part of a R8A77965 SoC. - "renesas,i2c-r8a77970" if the device is a part of a R8A77970 SoC. - "renesas,i2c-r8a77980" if the device is a part of a R8A77980 SoC. - "renesas,i2c-r8a77990" if the device is a part of a R8A77990 SoC. - "renesas,i2c-r8a77995" if the device is a part of a R8A77995 SoC. - "renesas,rcar-gen1-i2c" for a generic R-Car Gen1 compatible device. - "renesas,rcar-gen2-i2c" for a generic R-Car Gen2 or RZ/G1 compatible - device. - "renesas,rcar-gen3-i2c" for a generic R-Car Gen3 or RZ/G2 compatible - device. - "renesas,i2c-rcar" (deprecated) - - When compatible with the generic version, nodes must list the - SoC-specific version corresponding to the platform first followed - by the generic version. - -- reg: physical base address of the controller and length of memory mapped - region. -- interrupts: interrupt specifier. - -Optional properties: -- clock-frequency: desired I2C bus clock frequency in Hz. The absence of this - property indicates the default frequency 100 kHz. -- clocks: clock specifier. -- dmas: Must contain a list of two references to DMA specifiers, one for - transmission, and one for reception. -- dma-names: Must contain a list of two DMA names, "tx" and "rx". - -- i2c-scl-falling-time-ns: see i2c.txt -- i2c-scl-internal-delay-ns: see i2c.txt -- i2c-scl-rising-time-ns: see i2c.txt - -Examples : - -i2c0: i2c@e6508000 { - #address-cells = <1>; - #size-cells = <0>; - compatible = "renesas,i2c-r8a7791", "renesas,rcar-gen2-i2c"; - reg = <0 0xe6508000 0 0x40>; - interrupts = <0 287 IRQ_TYPE_LEVEL_HIGH>; - clocks = <&mstp9_clks R8A7791_CLK_I2C0>; - clock-frequency = <400000>; -}; diff --git a/Documentation/devicetree/bindings/i2c/renesas,i2c.txt b/Documentation/devicetree/bindings/i2c/renesas,i2c.txt new file mode 100644 index 000000000000..3ee5e8f6ee01 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/renesas,i2c.txt @@ -0,0 +1,62 @@ +I2C for R-Car platforms + +Required properties: +- compatible: + "renesas,i2c-r8a7743" if the device is a part of a R8A7743 SoC. + "renesas,i2c-r8a7744" if the device is a part of a R8A7744 SoC. + "renesas,i2c-r8a7745" if the device is a part of a R8A7745 SoC. + "renesas,i2c-r8a77470" if the device is a part of a R8A77470 SoC. + "renesas,i2c-r8a774a1" if the device is a part of a R8A774A1 SoC. + "renesas,i2c-r8a774c0" if the device is a part of a R8A774C0 SoC. + "renesas,i2c-r8a7778" if the device is a part of a R8A7778 SoC. + "renesas,i2c-r8a7779" if the device is a part of a R8A7779 SoC. + "renesas,i2c-r8a7790" if the device is a part of a R8A7790 SoC. + "renesas,i2c-r8a7791" if the device is a part of a R8A7791 SoC. + "renesas,i2c-r8a7792" if the device is a part of a R8A7792 SoC. + "renesas,i2c-r8a7793" if the device is a part of a R8A7793 SoC. + "renesas,i2c-r8a7794" if the device is a part of a R8A7794 SoC. + "renesas,i2c-r8a7795" if the device is a part of a R8A7795 SoC. + "renesas,i2c-r8a7796" if the device is a part of a R8A7796 SoC. + "renesas,i2c-r8a77965" if the device is a part of a R8A77965 SoC. + "renesas,i2c-r8a77970" if the device is a part of a R8A77970 SoC. + "renesas,i2c-r8a77980" if the device is a part of a R8A77980 SoC. + "renesas,i2c-r8a77990" if the device is a part of a R8A77990 SoC. + "renesas,i2c-r8a77995" if the device is a part of a R8A77995 SoC. + "renesas,rcar-gen1-i2c" for a generic R-Car Gen1 compatible device. + "renesas,rcar-gen2-i2c" for a generic R-Car Gen2 or RZ/G1 compatible + device. + "renesas,rcar-gen3-i2c" for a generic R-Car Gen3 or RZ/G2 compatible + device. + "renesas,i2c-rcar" (deprecated) + + When compatible with the generic version, nodes must list the + SoC-specific version corresponding to the platform first followed + by the generic version. + +- reg: physical base address of the controller and length of memory mapped + region. +- interrupts: interrupt specifier. + +Optional properties: +- clock-frequency: desired I2C bus clock frequency in Hz. The absence of this + property indicates the default frequency 100 kHz. +- clocks: clock specifier. +- dmas: Must contain a list of two references to DMA specifiers, one for + transmission, and one for reception. +- dma-names: Must contain a list of two DMA names, "tx" and "rx". + +- i2c-scl-falling-time-ns: see i2c.txt +- i2c-scl-internal-delay-ns: see i2c.txt +- i2c-scl-rising-time-ns: see i2c.txt + +Examples : + +i2c0: i2c@e6508000 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "renesas,i2c-r8a7791", "renesas,rcar-gen2-i2c"; + reg = <0 0xe6508000 0 0x40>; + interrupts = <0 287 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&mstp9_clks R8A7791_CLK_I2C0>; + clock-frequency = <400000>; +}; diff --git a/MAINTAINERS b/MAINTAINERS index b49db5ad0b64..a14ce44c33b3 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13650,7 +13650,7 @@ F: drivers/iio/adc/rcar-gyroadc.c RENESAS R-CAR I2C DRIVERS M: Wolfram Sang S: Supported -F: Documentation/devicetree/bindings/i2c/i2c-rcar.txt +F: Documentation/devicetree/bindings/i2c/renesas,i2c.txt F: Documentation/devicetree/bindings/i2c/renesas,iic.txt F: drivers/i2c/busses/i2c-rcar.c F: drivers/i2c/busses/i2c-sh_mobile.c -- cgit v1.2.3 From 747bee3574040246be18e2e9db709a7cb058b35b Mon Sep 17 00:00:00 2001 From: Simon Horman Date: Fri, 9 Aug 2019 14:30:04 -0700 Subject: dt-bindings: i2c: i2c-emev2: Rename bindings documentation file Rename the bindings documentation file for Renesas EMEV2 IIC controller from i2c-emev2.txt to renesas,iic-emev2.txt. This is part of an ongoing effort to name bindings documentation files for Renesas IP blocks consistently, in line with the compat strings they document. Signed-off-by: Simon Horman Reviewed-by: Geert Uytterhoeven Signed-off-by: Wolfram Sang --- .../devicetree/bindings/i2c/i2c-emev2.txt | 22 ---------------------- .../devicetree/bindings/i2c/renesas,iic-emev2.txt | 22 ++++++++++++++++++++++ MAINTAINERS | 2 +- 3 files changed, 23 insertions(+), 23 deletions(-) delete mode 100644 Documentation/devicetree/bindings/i2c/i2c-emev2.txt create mode 100644 Documentation/devicetree/bindings/i2c/renesas,iic-emev2.txt (limited to 'MAINTAINERS') diff --git a/Documentation/devicetree/bindings/i2c/i2c-emev2.txt b/Documentation/devicetree/bindings/i2c/i2c-emev2.txt deleted file mode 100644 index 5ed1ea1c7e14..000000000000 --- a/Documentation/devicetree/bindings/i2c/i2c-emev2.txt +++ /dev/null @@ -1,22 +0,0 @@ -Device tree configuration for Renesas EMEV2 IIC controller - -Required properties: -- compatible : "renesas,iic-emev2" -- reg : address start and address range size of device -- interrupts : specifier for the IIC controller interrupt -- clocks : phandle to the IP core SCLK -- clock-names : must be "sclk" -- #address-cells : should be <1> -- #size-cells : should be <0> - -Example: - - iic0: i2c@e0070000 { - #address-cells = <1>; - #size-cells = <0>; - compatible = "renesas,iic-emev2"; - reg = <0xe0070000 0x28>; - interrupts = <0 32 IRQ_TYPE_EDGE_RISING>; - clocks = <&iic0_sclk>; - clock-names = "sclk"; - }; diff --git a/Documentation/devicetree/bindings/i2c/renesas,iic-emev2.txt b/Documentation/devicetree/bindings/i2c/renesas,iic-emev2.txt new file mode 100644 index 000000000000..5ed1ea1c7e14 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/renesas,iic-emev2.txt @@ -0,0 +1,22 @@ +Device tree configuration for Renesas EMEV2 IIC controller + +Required properties: +- compatible : "renesas,iic-emev2" +- reg : address start and address range size of device +- interrupts : specifier for the IIC controller interrupt +- clocks : phandle to the IP core SCLK +- clock-names : must be "sclk" +- #address-cells : should be <1> +- #size-cells : should be <0> + +Example: + + iic0: i2c@e0070000 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "renesas,iic-emev2"; + reg = <0xe0070000 0x28>; + interrupts = <0 32 IRQ_TYPE_EDGE_RISING>; + clocks = <&iic0_sclk>; + clock-names = "sclk"; + }; diff --git a/MAINTAINERS b/MAINTAINERS index a14ce44c33b3..f89f27a2d09a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -13628,7 +13628,7 @@ F: drivers/clk/renesas/ RENESAS EMEV2 I2C DRIVER M: Wolfram Sang S: Supported -F: Documentation/devicetree/bindings/i2c/i2c-emev2.txt +F: Documentation/devicetree/bindings/i2c/renesas,iic-emev2.txt F: drivers/i2c/busses/i2c-emev2.c RENESAS ETHERNET DRIVERS -- cgit v1.2.3 From 4768e90ecaec6b503ff64229bda5d91186d2edd3 Mon Sep 17 00:00:00 2001 From: Max Staudt Date: Tue, 20 Aug 2019 11:27:39 +0200 Subject: i2c: Add i2c-icy for I2C on m68k/Amiga This is the i2c-icy driver for the ICY board for Amiga computers. It connects a PCF8584 I2C controller to the Zorro bus, providing I2C connectivity. The original documentation can be found on Aminet: https://aminet.net/package/docs/hard/icy IRQ support is currently not implemented, as i2c-algo-pcf is built for the ISA bus and a straight implementation of the same stack locks up a Zorro machine. Signed-off-by: Max Staudt Reviewed-by: Geert Uytterhoeven [wsa: added a missing newline reported by checkpatch] Signed-off-by: Wolfram Sang --- MAINTAINERS | 6 ++ drivers/i2c/busses/Kconfig | 11 +++ drivers/i2c/busses/Makefile | 1 + drivers/i2c/busses/i2c-icy.c | 173 +++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 191 insertions(+) create mode 100644 drivers/i2c/busses/i2c-icy.c (limited to 'MAINTAINERS') diff --git a/MAINTAINERS b/MAINTAINERS index f89f27a2d09a..97d35f4e2068 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -7750,6 +7750,12 @@ S: Maintained F: drivers/mfd/lpc_ich.c F: drivers/gpio/gpio-ich.c +ICY I2C DRIVER +M: Max Staudt +L: linux-i2c@vger.kernel.org +S: Maintained +F: drivers/i2c/busses/i2c-icy.c + IDE SUBSYSTEM M: "David S. Miller" L: linux-ide@vger.kernel.org diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig index 69f19312a574..8b97ba4a2c0c 100644 --- a/drivers/i2c/busses/Kconfig +++ b/drivers/i2c/busses/Kconfig @@ -1309,6 +1309,17 @@ config I2C_ELEKTOR This support is also available as a module. If so, the module will be called i2c-elektor. +config I2C_ICY + tristate "ICY Zorro card" + depends on ZORRO + select I2C_ALGOPCF + help + This supports the PCF8584 Zorro bus I2C adapter, known as ICY. + Say Y if you own such an adapter. + + This support is also available as a module. If so, the module + will be called i2c-icy. + config I2C_MLXCPLD tristate "Mellanox I2C driver" depends on X86_64 diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile index 80c23895eaaf..3ab8aebc39c9 100644 --- a/drivers/i2c/busses/Makefile +++ b/drivers/i2c/busses/Makefile @@ -140,6 +140,7 @@ obj-$(CONFIG_I2C_BCM_KONA) += i2c-bcm-kona.o obj-$(CONFIG_I2C_BRCMSTB) += i2c-brcmstb.o obj-$(CONFIG_I2C_CROS_EC_TUNNEL) += i2c-cros-ec-tunnel.o obj-$(CONFIG_I2C_ELEKTOR) += i2c-elektor.o +obj-$(CONFIG_I2C_ICY) += i2c-icy.o obj-$(CONFIG_I2C_MLXCPLD) += i2c-mlxcpld.o obj-$(CONFIG_I2C_OPAL) += i2c-opal.o obj-$(CONFIG_I2C_PCA_ISA) += i2c-pca-isa.o diff --git a/drivers/i2c/busses/i2c-icy.c b/drivers/i2c/busses/i2c-icy.c new file mode 100644 index 000000000000..0d61936dfc0b --- /dev/null +++ b/drivers/i2c/busses/i2c-icy.c @@ -0,0 +1,173 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * I2C driver for stand-alone PCF8584 style adapters on Zorro cards + * + * Original ICY documentation can be found on Aminet: + * https://aminet.net/package/docs/hard/icy + * + * There has been a modern community re-print of this design in 2019: + * https://www.a1k.org/forum/index.php?threads/70106/ + * + * The card is basically a Philips PCF8584 connected straight to the + * beginning of the AutoConfig'd address space (register S1 on base+2), + * with /INT on /INT2 on the Zorro bus. + * + * Copyright (c) 2019 Max Staudt + * + * This started as a fork of i2c-elektor.c and has evolved since. + * Thanks go to its authors for providing a base to grow on. + * + * + * IRQ support is currently not implemented. + * + * As it turns out, i2c-algo-pcf is really written with i2c-elektor's + * edge-triggered ISA interrupts in mind, while the Amiga's Zorro bus has + * level-triggered interrupts. This means that once an interrupt occurs, we + * have to tell the PCF8584 to shut up immediately, or it will keep the + * interrupt line busy and cause an IRQ storm. + + * However, because of the PCF8584's host-side protocol, there is no good + * way to just quieten it without side effects. Rather, we have to perform + * the next read/write operation straight away, which will reset the /INT + * pin. This entails re-designing the core of i2c-algo-pcf in the future. + * For now, we never request an IRQ from the PCF8584, and poll it instead. + */ + +#include +#include +#include +#include +#include +#include + +#include +#include + +#include +#include + +#include "../algos/i2c-algo-pcf.h" + +struct icy_i2c { + struct i2c_adapter adapter; + + void __iomem *reg_s0; + void __iomem *reg_s1; +}; + +/* + * Functions called by i2c-algo-pcf + */ +static void icy_pcf_setpcf(void *data, int ctl, int val) +{ + struct icy_i2c *i2c = (struct icy_i2c *)data; + + u8 __iomem *address = ctl ? i2c->reg_s1 : i2c->reg_s0; + + z_writeb(val, address); +} + +static int icy_pcf_getpcf(void *data, int ctl) +{ + struct icy_i2c *i2c = (struct icy_i2c *)data; + + u8 __iomem *address = ctl ? i2c->reg_s1 : i2c->reg_s0; + + return z_readb(address); +} + +static int icy_pcf_getown(void *data) +{ + return 0x55; +} + +static int icy_pcf_getclock(void *data) +{ + return 0x1c; +} + +static void icy_pcf_waitforpin(void *data) +{ + usleep_range(50, 150); +} + +/* + * Main i2c-icy part + */ +static int icy_probe(struct zorro_dev *z, + const struct zorro_device_id *ent) +{ + struct icy_i2c *i2c; + struct i2c_algo_pcf_data *algo_data; + + i2c = devm_kzalloc(&z->dev, sizeof(*i2c), GFP_KERNEL); + if (!i2c) + return -ENOMEM; + + algo_data = devm_kzalloc(&z->dev, sizeof(*algo_data), GFP_KERNEL); + if (!algo_data) + return -ENOMEM; + + dev_set_drvdata(&z->dev, i2c); + i2c->adapter.dev.parent = &z->dev; + i2c->adapter.owner = THIS_MODULE; + /* i2c->adapter.algo assigned by i2c_pcf_add_bus() */ + i2c->adapter.algo_data = algo_data; + strlcpy(i2c->adapter.name, "ICY I2C Zorro adapter", + sizeof(i2c->adapter.name)); + + if (!devm_request_mem_region(&z->dev, + z->resource.start, + 4, i2c->adapter.name)) + return -ENXIO; + + /* Driver private data */ + i2c->reg_s0 = ZTWO_VADDR(z->resource.start); + i2c->reg_s1 = ZTWO_VADDR(z->resource.start + 2); + + algo_data->data = i2c; + algo_data->setpcf = icy_pcf_setpcf; + algo_data->getpcf = icy_pcf_getpcf; + algo_data->getown = icy_pcf_getown; + algo_data->getclock = icy_pcf_getclock; + algo_data->waitforpin = icy_pcf_waitforpin; + + if (i2c_pcf_add_bus(&i2c->adapter)) { + dev_err(&z->dev, "i2c_pcf_add_bus() failed\n"); + return -ENXIO; + } + + dev_info(&z->dev, "ICY I2C controller at %pa, IRQ not implemented\n", + &z->resource.start); + + return 0; +} + +static void icy_remove(struct zorro_dev *z) +{ + struct icy_i2c *i2c = dev_get_drvdata(&z->dev); + + i2c_del_adapter(&i2c->adapter); +} + +static const struct zorro_device_id icy_zorro_tbl[] = { + { ZORRO_ID(VMC, 15, 0), }, + { 0 } +}; + +MODULE_DEVICE_TABLE(zorro, icy_zorro_tbl); + +static struct zorro_driver icy_driver = { + .name = "i2c-icy", + .id_table = icy_zorro_tbl, + .probe = icy_probe, + .remove = icy_remove, +}; + +module_driver(icy_driver, + zorro_register_driver, + zorro_unregister_driver); + +MODULE_AUTHOR("Max Staudt "); +MODULE_DESCRIPTION("I2C bus via PCF8584 on ICY Zorro card"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3