Commit 1bc95972 authored by Maxime Ripard's avatar Maxime Ripard Committed by Stephen Boyd

clk: bcm: Add BCM2711 DVP driver

The HDMI block has a block that controls clocks and reset signals to the
HDMI0 and HDMI1 controllers.

Let's expose that through a clock driver implementing a clock and reset
provider.

Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: linux-clk@vger.kernel.org
Cc: devicetree@vger.kernel.org
Reviewed-by: default avatarStephen Boyd <sboyd@kernel.org>
Signed-off-by: default avatarMaxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/bb60d97fc76b61c2eabef5a02ebd664c0f57ede0.1591867332.git-series.maxime@cerno.techAcked-by: default avatarStefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: default avatarNicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent 8dda0004
# SPDX-License-Identifier: GPL-2.0-only
config CLK_BCM2711_DVP
tristate "Broadcom BCM2711 DVP support"
depends on ARCH_BCM2835 ||COMPILE_TEST
depends on COMMON_CLK
default ARCH_BCM2835
select RESET_SIMPLE
help
Enable common clock framework support for the Broadcom BCM2711
DVP Controller.
config CLK_BCM2835
bool "Broadcom BCM2835 clock support"
depends on ARCH_BCM2835 || ARCH_BRCMSTB || COMPILE_TEST
......
......@@ -6,6 +6,7 @@ obj-$(CONFIG_CLK_BCM_KONA) += clk-kona-setup.o
obj-$(CONFIG_CLK_BCM_KONA) += clk-bcm281xx.o
obj-$(CONFIG_CLK_BCM_KONA) += clk-bcm21664.o
obj-$(CONFIG_COMMON_CLK_IPROC) += clk-iproc-armpll.o clk-iproc-pll.o clk-iproc-asiu.o
obj-$(CONFIG_CLK_BCM2711_DVP) += clk-bcm2711-dvp.o
obj-$(CONFIG_CLK_BCM2835) += clk-bcm2835.o
obj-$(CONFIG_CLK_BCM2835) += clk-bcm2835-aux.o
obj-$(CONFIG_CLK_RASPBERRYPI) += clk-raspberrypi.o
......
// SPDX-License-Identifier: GPL-2.0-or-later
// Copyright 2020 Cerno
#include <linux/clk-provider.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/reset-controller.h>
#include <linux/reset/reset-simple.h>
#define DVP_HT_RPI_SW_INIT 0x04
#define DVP_HT_RPI_MISC_CONFIG 0x08
#define NR_CLOCKS 2
#define NR_RESETS 6
struct clk_dvp {
struct clk_hw_onecell_data *data;
struct reset_simple_data reset;
};
static const struct clk_parent_data clk_dvp_parent = {
.index = 0,
};
static int clk_dvp_probe(struct platform_device *pdev)
{
struct clk_hw_onecell_data *data;
struct resource *res;
struct clk_dvp *dvp;
void __iomem *base;
int ret;
dvp = devm_kzalloc(&pdev->dev, sizeof(*dvp), GFP_KERNEL);
if (!dvp)
return -ENOMEM;
platform_set_drvdata(pdev, dvp);
dvp->data = devm_kzalloc(&pdev->dev,
struct_size(dvp->data, hws, NR_CLOCKS),
GFP_KERNEL);
if (!dvp->data)
return -ENOMEM;
data = dvp->data;
base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
if (IS_ERR(base))
return PTR_ERR(base);
dvp->reset.rcdev.owner = THIS_MODULE;
dvp->reset.rcdev.nr_resets = NR_RESETS;
dvp->reset.rcdev.ops = &reset_simple_ops;
dvp->reset.rcdev.of_node = pdev->dev.of_node;
dvp->reset.membase = base + DVP_HT_RPI_SW_INIT;
spin_lock_init(&dvp->reset.lock);
ret = devm_reset_controller_register(&pdev->dev, &dvp->reset.rcdev);
if (ret)
return ret;
data->hws[0] = clk_hw_register_gate_parent_data(&pdev->dev,
"hdmi0-108MHz",
&clk_dvp_parent, 0,
base + DVP_HT_RPI_MISC_CONFIG, 3,
CLK_GATE_SET_TO_DISABLE,
&dvp->reset.lock);
if (IS_ERR(data->hws[0]))
return PTR_ERR(data->hws[0]);
data->hws[1] = clk_hw_register_gate_parent_data(&pdev->dev,
"hdmi1-108MHz",
&clk_dvp_parent, 0,
base + DVP_HT_RPI_MISC_CONFIG, 4,
CLK_GATE_SET_TO_DISABLE,
&dvp->reset.lock);
if (IS_ERR(data->hws[1])) {
ret = PTR_ERR(data->hws[1]);
goto unregister_clk0;
}
data->num = NR_CLOCKS;
ret = of_clk_add_hw_provider(pdev->dev.of_node, of_clk_hw_onecell_get,
data);
if (ret)
goto unregister_clk1;
return 0;
unregister_clk1:
clk_hw_unregister_gate(data->hws[1]);
unregister_clk0:
clk_hw_unregister_gate(data->hws[0]);
return ret;
};
static int clk_dvp_remove(struct platform_device *pdev)
{
struct clk_dvp *dvp = platform_get_drvdata(pdev);
struct clk_hw_onecell_data *data = dvp->data;
clk_hw_unregister_gate(data->hws[1]);
clk_hw_unregister_gate(data->hws[0]);
return 0;
}
static const struct of_device_id clk_dvp_dt_ids[] = {
{ .compatible = "brcm,brcm2711-dvp", },
{ /* sentinel */ }
};
static struct platform_driver clk_dvp_driver = {
.probe = clk_dvp_probe,
.remove = clk_dvp_remove,
.driver = {
.name = "brcm2711-dvp",
.of_match_table = clk_dvp_dt_ids,
},
};
module_platform_driver(clk_dvp_driver);
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