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-rw-r--r--target/linux/bcm27xx/patches-5.4/950-0536-clk-bcm-Add-BCM2711-DVP-driver.patch172
1 files changed, 172 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0536-clk-bcm-Add-BCM2711-DVP-driver.patch b/target/linux/bcm27xx/patches-5.4/950-0536-clk-bcm-Add-BCM2711-DVP-driver.patch
new file mode 100644
index 0000000000..23105057a9
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0536-clk-bcm-Add-BCM2711-DVP-driver.patch
@@ -0,0 +1,172 @@
+From 0a2b9668e391b5fef4c54f992d7f8f99e5f50ef3 Mon Sep 17 00:00:00 2001
+From: Maxime Ripard <maxime@cerno.tech>
+Date: Tue, 28 Jan 2020 09:36:27 +0100
+Subject: [PATCH] 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
+Signed-off-by: Maxime Ripard <maxime@cerno.tech>
+---
+ drivers/clk/bcm/Kconfig | 1 +
+ drivers/clk/bcm/Makefile | 1 +
+ drivers/clk/bcm/clk-bcm2711-dvp.c | 125 ++++++++++++++++++++++++++++++
+ 3 files changed, 127 insertions(+)
+ create mode 100644 drivers/clk/bcm/clk-bcm2711-dvp.c
+
+--- a/drivers/clk/bcm/Kconfig
++++ b/drivers/clk/bcm/Kconfig
+@@ -4,6 +4,7 @@ config CLK_BCM2835
+ depends on ARCH_BCM2835 || ARCH_BRCMSTB || COMPILE_TEST
+ depends on COMMON_CLK
+ default ARCH_BCM2835 || ARCH_BRCMSTB
++ select RESET_SIMPLE
+ help
+ Enable common clock framework support for Broadcom BCM2835
+ SoCs.
+--- a/drivers/clk/bcm/Makefile
++++ b/drivers/clk/bcm/Makefile
+@@ -6,6 +6,7 @@ obj-$(CONFIG_CLK_BCM_KONA) += clk-kona-s
+ obj-$(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-$(CONFIG_CLK_BCM2835) += clk-bcm2711-dvp.o
+ obj-$(CONFIG_CLK_BCM2835) += clk-bcm2835.o
+ obj-$(CONFIG_CLK_BCM2835) += clk-bcm2835-aux.o
+ obj-$(CONFIG_CLK_RASPBERRYPI) += clk-raspberrypi.o
+--- /dev/null
++++ b/drivers/clk/bcm/clk-bcm2711-dvp.c
+@@ -0,0 +1,125 @@
++// 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 int clk_dvp_probe(struct platform_device *pdev)
++{
++ struct clk_hw_onecell_data *data;
++ struct resource *res;
++ struct clk_dvp *dvp;
++ void __iomem *base;
++ const char *parent;
++ 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;
++
++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ base = devm_ioremap_resource(&pdev->dev, 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 = reset_controller_register(&dvp->reset.rcdev);
++ if (ret)
++ return ret;
++
++ parent = of_clk_get_parent_name(pdev->dev.of_node, 0);
++ if (!parent)
++ goto unregister_reset;
++
++ data->hws[0] = clk_hw_register_gate(&pdev->dev, "hdmi0-108MHz",
++ parent, 0,
++ base + DVP_HT_RPI_MISC_CONFIG, 3,
++ CLK_GATE_SET_TO_DISABLE, &dvp->reset.lock);
++ if (IS_ERR(data->hws[0])) {
++ ret = PTR_ERR(data->hws[0]);
++ goto unregister_reset;
++ }
++
++ data->hws[1] = clk_hw_register_gate(&pdev->dev, "hdmi1-108MHz",
++ 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]);
++
++unregister_reset:
++ reset_controller_unregister(&dvp->reset.rcdev);
++ 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]);
++ reset_controller_unregister(&dvp->reset.rcdev);
++
++ 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);