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path: root/target/linux/brcm2708/patches-4.4/0155-clk-bcm2835-Add-a-driver-for-the-auxiliary-periphera.patch
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Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0155-clk-bcm2835-Add-a-driver-for-the-auxiliary-periphera.patch')
-rw-r--r--target/linux/brcm2708/patches-4.4/0155-clk-bcm2835-Add-a-driver-for-the-auxiliary-periphera.patch118
1 files changed, 118 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0155-clk-bcm2835-Add-a-driver-for-the-auxiliary-periphera.patch b/target/linux/brcm2708/patches-4.4/0155-clk-bcm2835-Add-a-driver-for-the-auxiliary-periphera.patch
new file mode 100644
index 0000000..02a939e
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0155-clk-bcm2835-Add-a-driver-for-the-auxiliary-periphera.patch
@@ -0,0 +1,118 @@
+From 7da110b37747778f802371f41cd1eabc0859354e Mon Sep 17 00:00:00 2001
+From: Eric Anholt <eric@anholt.net>
+Date: Tue, 15 Dec 2015 15:35:58 -0800
+Subject: [PATCH 155/304] clk: bcm2835: Add a driver for the auxiliary
+ peripheral clock gates.
+
+There are a pair of SPI masters and a mini UART that were last minute
+additions. As a result, they didn't get integrated in the same way as
+the other gates off of the VPU clock in CPRMAN.
+
+Signed-off-by: Eric Anholt <eric@anholt.net>
+Signed-off-by: Michael Turquette <mturquette@baylibre.com>
+
+updated Makefile to preserve the rasoberry pi architectures
+---
+ drivers/clk/bcm/Makefile | 1 +
+ drivers/clk/bcm/clk-bcm2835-aux.c | 85 +++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 86 insertions(+)
+ create mode 100644 drivers/clk/bcm/clk-bcm2835-aux.c
+
+--- a/drivers/clk/bcm/Makefile
++++ b/drivers/clk/bcm/Makefile
+@@ -4,6 +4,7 @@ obj-$(CONFIG_CLK_BCM_KONA) += clk-bcm281
+ obj-$(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_ARCH_BCM2835)$(CONFIG_ARCH_BCM2708)$(CONFIG_ARCH_BCM2709) += clk-bcm2835.o
++obj-$(CONFIG_ARCH_BCM2835) += clk-bcm2835-aux.o
+ obj-$(CONFIG_COMMON_CLK_IPROC) += clk-ns2.o
+ obj-$(CONFIG_ARCH_BCM_CYGNUS) += clk-cygnus.o
+ obj-$(CONFIG_ARCH_BCM_NSP) += clk-nsp.o
+--- /dev/null
++++ b/drivers/clk/bcm/clk-bcm2835-aux.c
+@@ -0,0 +1,85 @@
++/*
++ * Copyright (C) 2015 Broadcom
++ *
++ * 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.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ */
++
++#include <linux/clk.h>
++#include <linux/clk-provider.h>
++#include <linux/clk/bcm2835.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <dt-bindings/clock/bcm2835-aux.h>
++
++#define BCM2835_AUXIRQ 0x00
++#define BCM2835_AUXENB 0x04
++
++static int bcm2835_aux_clk_probe(struct platform_device *pdev)
++{
++ struct device *dev = &pdev->dev;
++ struct clk_onecell_data *onecell;
++ const char *parent;
++ struct clk *parent_clk;
++ struct resource *res;
++ void __iomem *reg, *gate;
++
++ parent_clk = devm_clk_get(dev, NULL);
++ if (IS_ERR(parent_clk))
++ return PTR_ERR(parent_clk);
++ parent = __clk_get_name(parent_clk);
++
++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ reg = devm_ioremap_resource(dev, res);
++ if (!reg)
++ return -ENODEV;
++
++ onecell = devm_kmalloc(dev, sizeof(*onecell), GFP_KERNEL);
++ if (!onecell)
++ return -ENOMEM;
++ onecell->clk_num = BCM2835_AUX_CLOCK_COUNT;
++ onecell->clks = devm_kcalloc(dev, BCM2835_AUX_CLOCK_COUNT,
++ sizeof(*onecell->clks), GFP_KERNEL);
++ if (!onecell->clks)
++ return -ENOMEM;
++
++ gate = reg + BCM2835_AUXENB;
++ onecell->clks[BCM2835_AUX_CLOCK_UART] =
++ clk_register_gate(dev, "aux_uart", parent, 0, gate, 0, 0, NULL);
++
++ onecell->clks[BCM2835_AUX_CLOCK_SPI1] =
++ clk_register_gate(dev, "aux_spi1", parent, 0, gate, 1, 0, NULL);
++
++ onecell->clks[BCM2835_AUX_CLOCK_SPI2] =
++ clk_register_gate(dev, "aux_spi2", parent, 0, gate, 2, 0, NULL);
++
++ of_clk_add_provider(pdev->dev.of_node, of_clk_src_onecell_get, onecell);
++
++ return 0;
++}
++
++static const struct of_device_id bcm2835_aux_clk_of_match[] = {
++ { .compatible = "brcm,bcm2835-aux", },
++ {},
++};
++MODULE_DEVICE_TABLE(of, bcm2835_aux_clk_of_match);
++
++static struct platform_driver bcm2835_aux_clk_driver = {
++ .driver = {
++ .name = "bcm2835-aux-clk",
++ .of_match_table = bcm2835_aux_clk_of_match,
++ },
++ .probe = bcm2835_aux_clk_probe,
++};
++builtin_platform_driver(bcm2835_aux_clk_driver);
++
++MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
++MODULE_DESCRIPTION("BCM2835 auxiliary peripheral clock driver");
++MODULE_LICENSE("GPL v2");