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Subject[RESEND][PATCHv2 3/3] NOMERGE: Sample driver
Date


Small sample driver to show what setup would look like with the dt
bindings

Signed-off-by: Laura Abbott <laura@labbott.name>
---
drivers/staging/android/ion/Kconfig | 6 ++
drivers/staging/android/ion/Makefile | 1 +
drivers/staging/android/ion/ion_of_sample.c | 96 +++++++++++++++++++++++++++++
3 files changed, 103 insertions(+)
create mode 100644 drivers/staging/android/ion/ion_of_sample.c

diff --git a/drivers/staging/android/ion/Kconfig b/drivers/staging/android/ion/Kconfig
index 9b6d65d..c2afb35 100644
--- a/drivers/staging/android/ion/Kconfig
+++ b/drivers/staging/android/ion/Kconfig
@@ -43,3 +43,9 @@ config ION_OF
extensions

If using Ion and devicetree, you should say Y here
+
+config ION_OF_SAMPLE
+ bool "Sample driver"
+ depends on ION_OF
+ help
+ Small sample driver showing the Ion OF interface
diff --git a/drivers/staging/android/ion/Makefile b/drivers/staging/android/ion/Makefile
index a77417b..1309b91 100644
--- a/drivers/staging/android/ion/Makefile
+++ b/drivers/staging/android/ion/Makefile
@@ -8,4 +8,5 @@ endif
obj-$(CONFIG_ION_DUMMY) += ion_dummy_driver.o
obj-$(CONFIG_ION_TEGRA) += tegra/
obj-$(CONFIG_ION_OF) += ion_of.o ion_physmem.o
+obj-$(CONFIG_ION_OF_SAMPLE) += ion_of_sample.o

diff --git a/drivers/staging/android/ion/ion_of_sample.c b/drivers/staging/android/ion/ion_of_sample.c
new file mode 100644
index 0000000..bbcdf4d
--- /dev/null
+++ b/drivers/staging/android/ion/ion_of_sample.c
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2015 RC Module
+ * Andrew Andrianov <andrew@ncrmnt.org>
+ * Also based on work from Google, The Linux Foundation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+#include "ion.h"
+#include "ion_priv.h"
+#include "ion_of.h"
+
+struct sample_ion_dev {
+ struct ion_heap **heaps;
+ struct ion_device *idev;
+};
+
+static struct ion_of_heap heaps[] = {
+ PLATFORM_HEAP("sample-system", 0, ION_HEAP_TYPE_SYSTEM, "system"),
+ PLATFORM_HEAP("sample-camera", 1, ION_HEAP_TYPE_DMA, "camera"),
+ PLATFORM_HEAP("sample-fb", 2, ION_HEAP_TYPE_DMA, "fb"),
+ {}
+};
+
+static int ion_sample_probe(struct platform_device *pdev)
+{
+ struct ion_platform_data *data;
+ struct sample_ion_dev *ipdev;
+ int i;
+
+ ipdev = devm_kzalloc(&pdev->dev, sizeof(*ipdev), GFP_KERNEL);
+ if (!ipdev)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, ipdev);
+
+ ipdev->idev = ion_device_create(NULL);
+ if (!ipdev->idev)
+ return -ENOMEM;
+
+ data = ion_parse_dt(pdev, heaps);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ ipdev->heaps = devm_kzalloc(&pdev->dev,
+ sizeof(struct ion_heap)*data->nr, GFP_KERNEL);
+
+ if (!ipdev->heaps)
+ return -ENOMEM;
+
+ for (i = 0; i < data->nr; i++) {
+ ipdev->heaps[i] = ion_heap_create(&data->heaps[i]);
+ if (!ipdev->heaps[i])
+ return -ENOMEM;
+ ion_device_add_heap(ipdev->idev, ipdev->heaps[i]);
+ }
+ return 0;
+}
+
+static int ion_sample_remove(struct platform_device *pdev)
+{
+ /* Everything should be devm */
+ return 0;
+}
+
+static const struct of_device_id of_match_table[] = {
+ { .compatible = "sample-ion", },
+ { /* end of list */ }
+};
+
+static struct platform_driver ion_sample_driver = {
+ .probe = ion_sample_probe,
+ .remove = ion_sample_remove,
+ .driver = {
+ .name = "ion-of",
+ .of_match_table = of_match_ptr(of_match_table),
+ },
+};
+
+static int __init ion_sample_init(void)
+{
+ return platform_driver_register(&ion_sample_driver);
+}
+device_initcall(ion_sample_init);
--
2.5.0
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