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This patch adds a driver for TI's TA5086 6-channel PWM processor. This chip has a very unusual register layout, specifically because the registers are of unequal size, and multi-byte registers require bulk writes to take effect. Regmap does not support these kind of mappings. Currently, the driver does not touch any of the registers >= 0x20, so it doesn't matter, because the register map is mapped to an 8-bit array. In case more features will be added in the future that require access to higher registers, the entire regmap H/W I/O routines have to be open-coded. Signed-off-by: Daniel Mack <zonque@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
33 lines
863 B
Plaintext
33 lines
863 B
Plaintext
Texas Instruments TAS5086 6-channel PWM Processor
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Required properties:
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- compatible: Should contain "ti,tas5086".
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- reg: The i2c address. Should contain <0x1b>.
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Optional properties:
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- reset-gpio: A GPIO spec to define which pin is connected to the
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chip's !RESET pin. If specified, the driver will
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assert a hardware reset at probe time.
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- ti,charge-period: This property should contain the time in microseconds
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that closely matches the external single-ended
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split-capacitor charge period. The hardware chip
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waits for this period of time before starting the
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PWM signals. This helps reduce pops and clicks.
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When not specified, the hardware default of 1300ms
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is retained.
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Examples:
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i2c_bus {
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tas5086@1b {
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compatible = "ti,tas5086";
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reg = <0x1b>;
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reset-gpio = <&gpio 23 0>;
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ti,charge-period = <156000>;
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};
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};
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