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/*
* OPA362 analog video amplifier with output/power control
*
* Copyright (C) 2014 Golden Delicious Computers
* Author: H. Nikolaus Schaller <hns@goldelico.com>
*
* based on encoder-tfp410
*
* Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
* Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
*
* 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/gpio/consumer.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include "../dss/omapdss.h"
struct panel_drv_data {
struct omap_dss_device dssdev;
struct gpio_desc *enable_gpio;
};
#define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
static int opa362_connect(struct omap_dss_device *src,
struct omap_dss_device *dst)
{
return omapdss_device_connect(dst->dss, dst, dst->next);
}
static void opa362_disconnect(struct omap_dss_device *src,
struct omap_dss_device *dst)
{
omapdss_device_disconnect(dst, dst->next);
}
static int opa362_enable(struct omap_dss_device *dssdev)
{
struct panel_drv_data *ddata = to_panel_data(dssdev);
struct omap_dss_device *src = dssdev->src;
int r;
dev_dbg(dssdev->dev, "enable\n");
if (!omapdss_device_is_connected(dssdev))
return -ENODEV;
if (omapdss_device_is_enabled(dssdev))
return 0;
r = src->ops->enable(src);
if (r)
return r;
if (ddata->enable_gpio)
gpiod_set_value_cansleep(ddata->enable_gpio, 1);
dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
return 0;
}
static void opa362_disable(struct omap_dss_device *dssdev)
{
struct panel_drv_data *ddata = to_panel_data(dssdev);
struct omap_dss_device *src = dssdev->src;
dev_dbg(dssdev->dev, "disable\n");
if (!omapdss_device_is_enabled(dssdev))
return;
if (ddata->enable_gpio)
gpiod_set_value_cansleep(ddata->enable_gpio, 0);
src->ops->disable(src);
dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
}
static const struct omap_dss_device_ops opa362_ops = {
.connect = opa362_connect,
.disconnect = opa362_disconnect,
.enable = opa362_enable,
.disable = opa362_disable,
};
static int opa362_probe(struct platform_device *pdev)
{
struct panel_drv_data *ddata;
struct omap_dss_device *dssdev;
struct gpio_desc *gpio;
dev_dbg(&pdev->dev, "probe\n");
ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
if (!ddata)
return -ENOMEM;
platform_set_drvdata(pdev, ddata);
gpio = devm_gpiod_get_optional(&pdev->dev, "enable", GPIOD_OUT_LOW);
if (IS_ERR(gpio))
return PTR_ERR(gpio);
ddata->enable_gpio = gpio;
dssdev = &ddata->dssdev;
dssdev->ops = &opa362_ops;
dssdev->dev = &pdev->dev;
dssdev->type = OMAP_DISPLAY_TYPE_VENC;
dssdev->output_type = OMAP_DISPLAY_TYPE_VENC;
dssdev->owner = THIS_MODULE;
dssdev->of_ports = BIT(1) | BIT(0);
dssdev->next = omapdss_of_find_connected_device(pdev->dev.of_node, 1);
if (IS_ERR(dssdev->next)) {
if (PTR_ERR(dssdev->next) != -EPROBE_DEFER)
dev_err(&pdev->dev, "failed to find video sink\n");
return PTR_ERR(dssdev->next);
}
omapdss_device_register(dssdev);
return 0;
}
static int __exit opa362_remove(struct platform_device *pdev)
{
struct panel_drv_data *ddata = platform_get_drvdata(pdev);
struct omap_dss_device *dssdev = &ddata->dssdev;
if (dssdev->next)
omapdss_device_put(dssdev->next);
omapdss_device_unregister(&ddata->dssdev);
WARN_ON(omapdss_device_is_enabled(dssdev));
if (omapdss_device_is_enabled(dssdev))
opa362_disable(dssdev);
WARN_ON(omapdss_device_is_connected(dssdev));
if (omapdss_device_is_connected(dssdev))
omapdss_device_disconnect(NULL, dssdev);
return 0;
}
static const struct of_device_id opa362_of_match[] = {
{ .compatible = "omapdss,ti,opa362", },
{},
};
MODULE_DEVICE_TABLE(of, opa362_of_match);
static struct platform_driver opa362_driver = {
.probe = opa362_probe,
.remove = __exit_p(opa362_remove),
.driver = {
.name = "amplifier-opa362",
.of_match_table = opa362_of_match,
.suppress_bind_attrs = true,
},
};
module_platform_driver(opa362_driver);
MODULE_AUTHOR("H. Nikolaus Schaller <hns@goldelico.com>");
MODULE_DESCRIPTION("OPA362 analog video amplifier with output/power control");
MODULE_LICENSE("GPL v2");
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