[media] rc: meson-ir: switch config to NEC decoding on shutdown (2aa1bd1c) · Commits · 戴 / test

On the Amlogic SoCs, the bootloader firmware can handle the IR hardware in order to Wake up or Power back the system when in suspend on shutdown mode. This patch switches the hardware configuration in a state usable by the firmware to permit powering the system back. Some vendor bootloader firmware were modified to switch to this configuration but it may not be the case for all available products. This patch was originally posted at [1]. [1] https://github.com/LibreELEC/linux-amlogic/pull/27 Signed-off-by:

Alex Deryskyba <alex@codesnake.com> Signed-off-by:

Neil Armstrong <narmstrong@baylibre.com> Signed-off-by:

Sean Young <sean@mess.org> Signed-off-by:

Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/rc/meson-ir.c

+27 −0

Original line number	Diff line number	Diff line
		@@ -201,6 +201,32 @@ static int meson_ir_remove(struct platform_device *pdev)
		return 0;
		}

		static void meson_ir_shutdown(struct platform_device *pdev)
		{
		struct device *dev = &pdev->dev;
		struct device_node *node = dev->of_node;
		struct meson_ir *ir = platform_get_drvdata(pdev);
		unsigned long flags;

		spin_lock_irqsave(&ir->lock, flags);

		/*
		* Set operation mode to NEC/hardware decoding to give
		* bootloader a chance to power the system back on
		*/
		if (of_device_is_compatible(node, "amlogic,meson6-ir"))
		meson_ir_set_mask(ir, IR_DEC_REG1, REG1_MODE_MASK,
		DECODE_MODE_NEC << REG1_MODE_SHIFT);
		else
		meson_ir_set_mask(ir, IR_DEC_REG2, REG2_MODE_MASK,
		DECODE_MODE_NEC << REG2_MODE_SHIFT);

		/* Set rate to default value */
		meson_ir_set_mask(ir, IR_DEC_REG0, REG0_RATE_MASK, 0x13);

		spin_unlock_irqrestore(&ir->lock, flags);
		}

		static const struct of_device_id meson_ir_match[] = {
		{ .compatible = "amlogic,meson6-ir" },
		{ .compatible = "amlogic,meson8b-ir" },
		@@ -212,6 +238,7 @@ MODULE_DEVICE_TABLE(of, meson_ir_match);
		static struct platform_driver meson_ir_driver = {
		.probe = meson_ir_probe,
		.remove = meson_ir_remove,
		.shutdown = meson_ir_shutdown,
		.driver = {
		.name = DRIVER_NAME,
		.of_match_table = meson_ir_match,

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