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The PCA995x chips are I2C controlled LED drivers. Each chip has up to 16 outputs, each one with an individual 8-bit resolution PWM for brightness control. Add binding document. Signed-off-by: Marek Vasut <marex@denx.de> Reviewed-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20230713163516.21644-1-marex@denx.de Signed-off-by: Lee Jones <lee@kernel.org>