ARM: dts: meson: add the AO ARC remote processor - WiP (43418032) · Commits · 戴 / test

arch/arm/boot/dts/meson.dtsi

+13 −0

Original line number	Diff line number	Diff line
		@@ -211,6 +211,14 @@
		#size-cells = <1>;
		ranges = <0x0 0xc8100000 0x100000>;

		ao_arc_rproc: remoteproc@1c {
		compatible= "amlogic,meson-mx-ao-arc-rproc";
		reg = <0x1c 0x8>, <0x38 0x8>;
		reg-names = "remap", "cpu";
		amlogic,sram = <&ahb_sram>;
		amlogic,secbus2 = <&secbus2>;
		};

		ir_receiver: ir-receiver@480 {
		compatible= "amlogic,meson6-ir";
		reg = <0x480 0x20>;
		@@ -306,6 +314,11 @@
		#address-cells = <1>;
		#size-cells = <1>;
		};

		secbus2: bus@4000 {
		compatible = "amlogic,meson-mx-secbus2";
		reg = <0x4000 0x2000>;
		};
		};
		};

+4 −0

+5 −0

Original line number	Diff line number	Diff line
		@@ -545,6 +545,11 @@
		resets = <&reset RESET_AIU>;
		};

		&ao_arc_rproc {
		resets = <&reset RESET_MEDIA_CPU>;
		reset-names = "arc625";
		};

		&cbus {
		reset: reset-controller@4404 {
		compatible = "amlogic,meson8b-reset";

+5 −0

Original line number	Diff line number	Diff line
		@@ -504,6 +504,11 @@
		resets = <&reset RESET_AIU>;
		};

		&ao_arc_rproc {
		resets = <&reset RESET_MEDIA_CPU>;
		reset-names = "arc625";
		};

		&cbus {
		reset: reset-controller@4404 {
		compatible = "amlogic,meson8b-reset";

+26 −2

Original line number	Diff line number	Diff line
		@@ -6,6 +6,7 @@
		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/io.h>
		#include <linux/iopoll.h>
		#include <linux/slab.h>
		#include <linux/of.h>
		#include <linux/of_platform.h>
		@@ -24,16 +25,39 @@ static void* __iomem meson_mx_ao_arc_mbox_iomem(struct mbox_chan *chan)
		return (void* __iomem)chan->con_priv;
		}

		static bool meson_mx_ao_arc_mbox_rts(struct mbox_chan *chan)
		{
		return readl_relaxed(meson_mx_ao_arc_mbox_iomem(chan)) == 0;
		}

		static int meson_mx_ao_arc_mbox_send_data(struct mbox_chan chan, void data)
		{

		u32 *arg = data;

		if (!meson_mx_ao_arc_mbox_rts(chan))
		return -EBUSY;

		writel_relaxed(*arg, meson_mx_ao_arc_mbox_iomem(chan));

		return 0;
		}

		static int meson_mx_ao_arc_mbox_flush(struct mbox_chan *chan,
		unsigned long timeout)
		{
		timeout = jiffies + msecs_to_jiffies(timeout);

		while (time_before(jiffies, timeout)) {
		if (meson_mx_ao_arc_mbox_rts(chan))
		return 0;

		udelay(5);
		}

		return -ETIMEDOUT;
		}

		static int meson_mx_ao_arc_mbox_startup(struct mbox_chan *chan)
		{
		u32 data = 0;
		@@ -43,12 +67,12 @@ static int meson_mx_ao_arc_mbox_startup(struct mbox_chan *chan)

		static bool meson_mx_ao_arc_mbox_last_tx_done(struct mbox_chan *chan)
		{

		return readl_relaxed(meson_mx_ao_arc_mbox_iomem(chan)) == 0;
		return meson_mx_ao_arc_mbox_rts(chan);
		}

		static const struct mbox_chan_ops meson_mx_ao_arc_mbox_ops = {
		.send_data = meson_mx_ao_arc_mbox_send_data,
		.flush = meson_mx_ao_arc_mbox_flush,
		.startup = meson_mx_ao_arc_mbox_startup,
		.last_tx_done = meson_mx_ao_arc_mbox_last_tx_done,
		};