318313d1d4
Another pile of misc: - Explicit fencing for atomic! Big thanks to Gustavo, Sean, Rob 3x, Brian and anyone else I've forgotten to make this happen. - roll out fbdev helper ops to drivers (Stefan Christ) - last bits of drm_crtc split-up&kerneldoc - some drm_irq.c crtc functions cleanup - prepare_fb helper for cma, works correctly with explicit fencing (Marek Vasut) - misc small patches all over * tag 'drm-misc-next-2016-11-16' of git://anongit.freedesktop.org/git/drm-misc: (51 commits) drm/fence: add out-fences support drm/fence: add fence timeline to drm_crtc drm/fence: add in-fences support drm/bridge: analogix_dp: return error if transfer none byte drm: drm_irq.h header cleanup drm/irq: Unexport drm_vblank_on/off drm/irq: Unexport drm_vblank_count drm/irq: Make drm_vblank_pre/post_modeset internal drm/nouveau: Use drm_crtc_vblank_off/on drm/amdgpu: Use drm_crtc_vblank_on/off for dce6 drm/color: document NULL values and default settings better drm: Drop externs from drm_crtc.h drm: Move tile group code into drm_connector.c drm: Extract drm_mode_config.[hc] Revert "drm: Add aspect ratio parsing in DRM layer" Revert "drm: Add and handle new aspect ratios in DRM layer" drm/print: Move kerneldoc next to definition drm: Consolidate dumb buffer docs drm: Clean up kerneldoc for struct drm_driver drm: Extract drm_drv.h ...
121 lines
2.9 KiB
C
121 lines
2.9 KiB
C
/*
|
|
* Copyright (C) 2016 Free Electrons
|
|
*
|
|
* Maxime Ripard <maxime.ripard@free-electrons.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/clk.h>
|
|
#include <linux/component.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/reset.h>
|
|
|
|
struct sun6i_drc {
|
|
struct clk *bus_clk;
|
|
struct clk *mod_clk;
|
|
struct reset_control *reset;
|
|
};
|
|
|
|
static int sun6i_drc_bind(struct device *dev, struct device *master,
|
|
void *data)
|
|
{
|
|
struct sun6i_drc *drc;
|
|
int ret;
|
|
|
|
drc = devm_kzalloc(dev, sizeof(*drc), GFP_KERNEL);
|
|
if (!drc)
|
|
return -ENOMEM;
|
|
dev_set_drvdata(dev, drc);
|
|
|
|
drc->reset = devm_reset_control_get(dev, NULL);
|
|
if (IS_ERR(drc->reset)) {
|
|
dev_err(dev, "Couldn't get our reset line\n");
|
|
return PTR_ERR(drc->reset);
|
|
}
|
|
|
|
ret = reset_control_deassert(drc->reset);
|
|
if (ret) {
|
|
dev_err(dev, "Couldn't deassert our reset line\n");
|
|
return ret;
|
|
}
|
|
|
|
drc->bus_clk = devm_clk_get(dev, "ahb");
|
|
if (IS_ERR(drc->bus_clk)) {
|
|
dev_err(dev, "Couldn't get our bus clock\n");
|
|
ret = PTR_ERR(drc->bus_clk);
|
|
goto err_assert_reset;
|
|
}
|
|
clk_prepare_enable(drc->bus_clk);
|
|
|
|
drc->mod_clk = devm_clk_get(dev, "mod");
|
|
if (IS_ERR(drc->mod_clk)) {
|
|
dev_err(dev, "Couldn't get our mod clock\n");
|
|
ret = PTR_ERR(drc->mod_clk);
|
|
goto err_disable_bus_clk;
|
|
}
|
|
clk_prepare_enable(drc->mod_clk);
|
|
|
|
return 0;
|
|
|
|
err_disable_bus_clk:
|
|
clk_disable_unprepare(drc->bus_clk);
|
|
err_assert_reset:
|
|
reset_control_assert(drc->reset);
|
|
return ret;
|
|
}
|
|
|
|
static void sun6i_drc_unbind(struct device *dev, struct device *master,
|
|
void *data)
|
|
{
|
|
struct sun6i_drc *drc = dev_get_drvdata(dev);
|
|
|
|
clk_disable_unprepare(drc->mod_clk);
|
|
clk_disable_unprepare(drc->bus_clk);
|
|
reset_control_assert(drc->reset);
|
|
}
|
|
|
|
static const struct component_ops sun6i_drc_ops = {
|
|
.bind = sun6i_drc_bind,
|
|
.unbind = sun6i_drc_unbind,
|
|
};
|
|
|
|
static int sun6i_drc_probe(struct platform_device *pdev)
|
|
{
|
|
return component_add(&pdev->dev, &sun6i_drc_ops);
|
|
}
|
|
|
|
static int sun6i_drc_remove(struct platform_device *pdev)
|
|
{
|
|
component_del(&pdev->dev, &sun6i_drc_ops);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id sun6i_drc_of_table[] = {
|
|
{ .compatible = "allwinner,sun6i-a31-drc" },
|
|
{ .compatible = "allwinner,sun6i-a31s-drc" },
|
|
{ .compatible = "allwinner,sun8i-a33-drc" },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, sun6i_drc_of_table);
|
|
|
|
static struct platform_driver sun6i_drc_platform_driver = {
|
|
.probe = sun6i_drc_probe,
|
|
.remove = sun6i_drc_remove,
|
|
.driver = {
|
|
.name = "sun6i-drc",
|
|
.of_match_table = sun6i_drc_of_table,
|
|
},
|
|
};
|
|
module_platform_driver(sun6i_drc_platform_driver);
|
|
|
|
MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
|
|
MODULE_DESCRIPTION("Allwinner A31 Dynamic Range Control (DRC) Driver");
|
|
MODULE_LICENSE("GPL");
|