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authorLinus Torvalds <torvalds@linux-foundation.org>2024-11-25 17:15:12 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2024-11-25 17:15:12 -0800
commit70dbb12e95ec7585c68cb3ceae971688915021e3 (patch)
treecf14241e7fffb6679f15fda2b25514bc8a031266 /Documentation
parent5d38cb9bee73969125c7818a9f9e3358e0db07d6 (diff)
parent16470f60666618830cb9f0b8dfafd34a838c6dbd (diff)
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Merge tag 'i2c-for-6.13-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull more i2c updates from Wolfram Sang: "Andi was super busy the last weeks, so this pull requests contains one series (nomadik) and a number of smaller additions which were ready to go but nearly overlooked. New feature support: - Added support for frequencies up to 3.4 MHz on Nomadik I2C - DesignWare now accounts for bus capacitance and clock optimisation (declared as new parameters in the binding) to improve the calculation of signal rise and fall times (t_high and t_low) New Hardware support: - DWAPB I2C controller on FUJITSU-MONAKA (new ACPI HID) - Allwinner A523 (new compatible ID) - Mobileye EyeQ6H (new compatible ID)" * tag 'i2c-for-6.13-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: MAINTAINERS: transfer i2c-aspeed maintainership from Brendan to Ryan i2c: designware: determine HS tHIGH and tLOW based on HW parameters dt-bindings: i2c: snps,designware-i2c: declare bus capacitance and clk freq optimized i2c: nomadik: support >=1MHz speed modes i2c: nomadik: fix BRCR computation i2c: nomadik: support Mobileye EyeQ6H I2C controller i2c: nomadik: switch from of_device_is_compatible() to of_match_device() dt-bindings: i2c: nomadik: support 400kHz < clock-frequency <= 3.4MHz dt-bindings: i2c: nomadik: add mobileye,eyeq6h-i2c bindings dt-bindings: i2c: mv64xxx: Add Allwinner A523 compatible string i2c: designware: Add ACPI HID for DWAPB I2C controller on FUJITSU-MONAKA i2c: qup: use generic device property accessors
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml1
-rw-r--r--Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml18
-rw-r--r--Documentation/devicetree/bindings/i2c/st,nomadik-i2c.yaml13
3 files changed, 26 insertions, 6 deletions
diff --git a/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml b/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml
index 984fc1ed3ec6..c4efcef59133 100644
--- a/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml
+++ b/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml
@@ -33,6 +33,7 @@ properties:
- allwinner,sun50i-a100-i2c
- allwinner,sun50i-h616-i2c
- allwinner,sun50i-r329-i2c
+ - allwinner,sun55i-a523-i2c
- const: allwinner,sun8i-v536-i2c
- const: allwinner,sun6i-a31-i2c
- const: marvell,mv64xxx-i2c
diff --git a/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml b/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml
index 60035a787e5c..e5d05263c45a 100644
--- a/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml
+++ b/Documentation/devicetree/bindings/i2c/snps,designware-i2c.yaml
@@ -97,6 +97,22 @@ properties:
- const: tx
- const: rx
+ snps,bus-capacitance-pf:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ This property indicates the bus capacitance in picofarads (pF).
+ This value is used to compute the tHIGH and tLOW periods for high speed
+ mode.
+ enum: [100, 400]
+ default: 100
+
+ snps,clk-freq-optimized:
+ description:
+ This property indicates whether the hardware reduce its clock frequency
+ by reducing the internal latency required to generate the high period and
+ low period of SCL line.
+ type: boolean
+
unevaluatedProperties: false
required:
@@ -121,6 +137,8 @@ examples:
i2c-sda-hold-time-ns = <300>;
i2c-sda-falling-time-ns = <300>;
i2c-scl-falling-time-ns = <300>;
+ snps,bus-capacitance-pf = <400>;
+ snps,clk-freq-optimized;
};
- |
i2c@2000 {
diff --git a/Documentation/devicetree/bindings/i2c/st,nomadik-i2c.yaml b/Documentation/devicetree/bindings/i2c/st,nomadik-i2c.yaml
index 44c54b162bb1..012402debfeb 100644
--- a/Documentation/devicetree/bindings/i2c/st,nomadik-i2c.yaml
+++ b/Documentation/devicetree/bindings/i2c/st,nomadik-i2c.yaml
@@ -22,6 +22,7 @@ select:
enum:
- st,nomadik-i2c
- mobileye,eyeq5-i2c
+ - mobileye,eyeq6h-i2c
required:
- compatible
@@ -29,15 +30,15 @@ properties:
compatible:
oneOf:
- items:
- - const: st,nomadik-i2c
+ - enum:
+ - st,nomadik-i2c
+ - mobileye,eyeq5-i2c
+ - mobileye,eyeq6h-i2c
- const: arm,primecell
- items:
- const: stericsson,db8500-i2c
- const: st,nomadik-i2c
- const: arm,primecell
- - items:
- - const: mobileye,eyeq5-i2c
- - const: arm,primecell
reg:
maxItems: 1
@@ -54,7 +55,7 @@ properties:
- items:
- const: mclk
- const: apb_pclk
- # Clock name in DB8500 or EyeQ5
+ # Clock name in DB8500 or EyeQ
- items:
- const: i2cclk
- const: apb_pclk
@@ -67,7 +68,7 @@ properties:
clock-frequency:
minimum: 1
- maximum: 400000
+ maximum: 3400000
mobileye,olb:
$ref: /schemas/types.yaml#/definitions/phandle-array