20402106a3
As usual these patches were extracted and rebased from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
118 lines
4 KiB
Diff
118 lines
4 KiB
Diff
From 308d421f734ecdf5664603b87d2b327c2f46f810 Mon Sep 17 00:00:00 2001
|
|
From: Eric Anholt <eric@anholt.net>
|
|
Date: Tue, 15 Dec 2015 15:35:58 -0800
|
|
Subject: [PATCH 155/423] 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");
|