diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0156-clk-bcm2835-Add-a-driver-for-the-auxiliary-periphera.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0156-clk-bcm2835-Add-a-driver-for-the-auxiliary-periphera.patch | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0156-clk-bcm2835-Add-a-driver-for-the-auxiliary-periphera.patch b/target/linux/brcm2708/patches-4.4/0156-clk-bcm2835-Add-a-driver-for-the-auxiliary-periphera.patch new file mode 100644 index 0000000000..4518af1a28 --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0156-clk-bcm2835-Add-a-driver-for-the-auxiliary-periphera.patch @@ -0,0 +1,118 @@ +From cfe1737d9aab03ecd152291df704606a7724eb21 Mon Sep 17 00:00:00 2001 +From: Eric Anholt <eric@anholt.net> +Date: Tue, 15 Dec 2015 15:35:58 -0800 +Subject: [PATCH 156/232] 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"); |