diff options
Diffstat (limited to 'drivers/clk/bcm')
| -rw-r--r-- | drivers/clk/bcm/Makefile | 1 | ||||
| -rw-r--r-- | drivers/clk/bcm/clk-bcm2835-aux.c | 85 |
2 files changed, 86 insertions, 0 deletions
diff --git a/drivers/clk/bcm/Makefile b/drivers/clk/bcm/Makefile index 3fc95060d875..183484c83006 100644 --- a/drivers/clk/bcm/Makefile +++ b/drivers/clk/bcm/Makefile @@ -4,6 +4,7 @@ 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_ARCH_BCM2835) += 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 diff --git a/drivers/clk/bcm/clk-bcm2835-aux.c b/drivers/clk/bcm/clk-bcm2835-aux.c new file mode 100644 index 000000000000..e4f89e28b5ec --- /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"); |