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* Attach Meson64 to mainline with a bunch of patches. Tested, but need further work. * Enable DVFS on N2 which sometimes works, sometime doesn't, cleanup * Enable beta targets for Meson64 kernel family * Bump with version
146 lines
3.9 KiB
Diff
146 lines
3.9 KiB
Diff
From 7069d8ecc61afe003a1cbe20a2a4c29c67dedeae Mon Sep 17 00:00:00 2001
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From: Jerome Brunet <jbrunet@baylibre.com>
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Date: Tue, 22 Oct 2019 14:03:49 +0200
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Subject: [PATCH 49/94] WIP: ASoC: meson: add aiu bus support
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The AIU is audio playback subsystem of the legacy Amlogic SoC, such as
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the gxbb, gxl and gxm family.
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Blabla
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Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
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---
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sound/soc/meson/Kconfig | 7 ++++
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sound/soc/meson/Makefile | 2 ++
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sound/soc/meson/aiu-bus.c | 82 +++++++++++++++++++++++++++++++++++++++++++++++
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3 files changed, 91 insertions(+)
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create mode 100644 sound/soc/meson/aiu-bus.c
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diff --git a/sound/soc/meson/Kconfig b/sound/soc/meson/Kconfig
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index 4c1ced9..5b15077 100644
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--- a/sound/soc/meson/Kconfig
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+++ b/sound/soc/meson/Kconfig
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@@ -2,6 +2,13 @@
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menu "ASoC support for Amlogic platforms"
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depends on ARCH_MESON || COMPILE_TEST
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+config SND_MESON_AIU_BUS
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+ tristate "Amlogic AIU bus support"
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+ select REGMAP_MMIO
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+ help
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+ Select Y or M to add support for audio output interfaces
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+ embedded in the Amlogic GX SoC families
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+
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config SND_MESON_AXG_FIFO
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tristate
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select REGMAP_MMIO
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diff --git a/sound/soc/meson/Makefile b/sound/soc/meson/Makefile
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index 5331c41..6c89ab3 100644
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--- a/sound/soc/meson/Makefile
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+++ b/sound/soc/meson/Makefile
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@@ -1,5 +1,6 @@
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# SPDX-License-Identifier: (GPL-2.0 OR MIT)
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+snd-soc-meson-aiu-bus-objs := aiu-bus.o
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snd-soc-meson-axg-fifo-objs := axg-fifo.o
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snd-soc-meson-axg-frddr-objs := axg-frddr.o
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snd-soc-meson-axg-toddr-objs := axg-toddr.o
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@@ -16,6 +17,7 @@ snd-soc-meson-g12a-toacodec-objs := g12a-toacodec.o
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snd-soc-meson-g12a-tohdmitx-objs := g12a-tohdmitx.o
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snd-soc-meson-t9015-objs := t9015.o
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+obj-$(CONFIG_SND_MESON_AIU_BUS) += snd-soc-meson-aiu-bus.o
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obj-$(CONFIG_SND_MESON_AXG_FIFO) += snd-soc-meson-axg-fifo.o
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obj-$(CONFIG_SND_MESON_AXG_FRDDR) += snd-soc-meson-axg-frddr.o
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obj-$(CONFIG_SND_MESON_AXG_TODDR) += snd-soc-meson-axg-toddr.o
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diff --git a/sound/soc/meson/aiu-bus.c b/sound/soc/meson/aiu-bus.c
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new file mode 100644
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index 0000000..479c5e6
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--- /dev/null
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+++ b/sound/soc/meson/aiu-bus.c
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@@ -0,0 +1,82 @@
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+// SPDX-License-Identifier: GPL-2.0
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+//
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+// Copyright (c) 2019 BayLibre, SAS.
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+// Author: Jerome Brunet <jbrunet@baylibre.com>
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+
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+#include <linux/clk.h>
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+#include <linux/module.h>
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+#include <linux/of_platform.h>
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+#include <linux/reset.h>
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+
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+static const char * const aiu_bus_clk_names[] = { "top", "glue", };
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+
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+static int aiu_bus_enable_pclks(struct device *dev)
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+{
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+ struct clk *clock;
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+ int i, ret;
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+
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+ for (i = 0; i < ARRAY_SIZE(aiu_bus_clk_names); i++) {
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+ clock = devm_clk_get(dev, aiu_bus_clk_names[i]);
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+ if (IS_ERR(clock)) {
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+ if (PTR_ERR(clock) != -EPROBE_DEFER)
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+ dev_err(dev, "Failed to get %s clock\n",
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+ aiu_bus_clk_names[i]);
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+ return PTR_ERR(clock);
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+ }
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+
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+ ret = clk_prepare_enable(clock);
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+ if (ret) {
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+ dev_err(dev, "Failed to enable %s clock\n",
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+ aiu_bus_clk_names[i]);
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+ return ret;
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+ }
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+
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+ ret = devm_add_action_or_reset(dev,
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+ (void(*)(void *))clk_disable_unprepare,
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+ clock);
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+ if (ret)
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+ return ret;
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+ }
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+
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+ return 0;
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+}
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+
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+static const struct of_device_id aiu_bus_of_match[] = {
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+ {
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+ .compatible = "amlogic,aiu-bus",
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+ .data = NULL,
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+ }, {}
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+};
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+MODULE_DEVICE_TABLE(of, aiu_bus_of_match);
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+
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+static int aiu_bus_probe(struct platform_device *pdev)
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+{
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+ struct device *dev = &pdev->dev;
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+ int ret;
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+
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+ /* Fire and forget bus pclks */
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+ ret = aiu_bus_enable_pclks(dev);
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+ if (ret)
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+ return ret;
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+
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+ ret = device_reset(dev);
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+ if (ret) {
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+ dev_err(dev, "reset failed\n");
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+ return ret;
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+ }
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+
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+ return devm_of_platform_populate(dev);
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+}
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+
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+static struct platform_driver aiu_bus_pdrv = {
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+ .probe = aiu_bus_probe,
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+ .driver = {
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+ .name = "meson-aiu-bus",
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+ .of_match_table = aiu_bus_of_match,
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+ },
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+};
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+module_platform_driver(aiu_bus_pdrv);
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+
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+MODULE_DESCRIPTION("Amlogic AIU bus driver");
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+MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
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+MODULE_LICENSE("GPL v2");
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--
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2.7.1
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