Parses OMAP clock data from DT and registers those clocks with the clock framework. dt_omap_clk_init must be called early during boot for timer initialization so it is exported and called from the existing clock code instead of probing like a real driver.
Cc: Benoit Cousson <[email protected]> Cc: Rajendra Nayak <[email protected]> Cc: Joel A Fernandes <[email protected]> Cc: Nishanth Menon <[email protected]> Cc: Paul Walmsley <[email protected]> Cc: Tony Lindgren <[email protected]> Signed-off-by: Mike Turquette <[email protected]> --- This driver simply matches the basic bindings (so far). Eventually it would match omap-specific bindings for DPLLs, CLKOUTX2 and strange leaf clocks as well. This doesn't scale well since non-OMAP related clock data (e.g. a pmic or discrete audio codec) will get grouped into this driver if it matches on a basic clock type. Suggestions? drivers/clk/Makefile | 1 + drivers/clk/omap/Makefile | 1 + drivers/clk/omap/clk.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++ include/linux/clk/omap.h | 24 +++++++++++++++++++++ 4 files changed, 81 insertions(+) create mode 100644 drivers/clk/omap/Makefile create mode 100644 drivers/clk/omap/clk.c create mode 100644 include/linux/clk/omap.h diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index f51b52b..efd4f2a 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -31,6 +31,7 @@ obj-$(CONFIG_ARCH_VT8500) += clk-vt8500.o obj-$(CONFIG_ARCH_ZYNQ) += clk-zynq.o obj-$(CONFIG_ARCH_TEGRA) += tegra/ obj-$(CONFIG_PLAT_SAMSUNG) += samsung/ +obj-$(CONFIG_ARCH_OMAP) += omap/ obj-$(CONFIG_X86) += x86/ diff --git a/drivers/clk/omap/Makefile b/drivers/clk/omap/Makefile new file mode 100644 index 0000000..8195931 --- /dev/null +++ b/drivers/clk/omap/Makefile @@ -0,0 +1 @@ +obj-y += clk.o diff --git a/drivers/clk/omap/clk.c b/drivers/clk/omap/clk.c new file mode 100644 index 0000000..e9e5c95 --- /dev/null +++ b/drivers/clk/omap/clk.c @@ -0,0 +1,55 @@ +/* + * OMAP PRCM clock driver + * + * Copyright (C) 2013 Linaro.org - http://www.linaro.org + * Mike Turquette <[email protected]> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; 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-provider.h> +#include <linux/clk/omap.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> + +/* FIXME - should the OMAP PRCM clock driver match generic types? */ +static const struct of_device_id clk_match[] = { + {.compatible = "fixed-clock", .data = of_fixed_clk_setup, }, + {.compatible = "mux-clock", .data = of_mux_clk_setup, }, + {.compatible = "fixed-factor-clock", + .data = of_fixed_factor_clk_setup, }, + {}, +}; + +static int omap_clk_probe(struct platform_device *pdev) +{ + of_clk_init(clk_match); + return 0; +} + +static struct platform_driver omap_clk_driver = { + .probe = omap_clk_probe, + .driver = { + .name = "omap_clk", + .of_match_table = of_match_ptr(clk_match), + }, +}; + +/* FIXME - need to initialize early; skip real driver registration & probe */ +int __init dt_omap_clk_init(void) +{ + return omap_clk_probe(NULL); +} + +MODULE_DESCRIPTION("OMAP Clock driver"); +MODULE_AUTHOR("Texas Instruments Inc."); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/clk/omap.h b/include/linux/clk/omap.h new file mode 100644 index 0000000..504e838 --- /dev/null +++ b/include/linux/clk/omap.h @@ -0,0 +1,24 @@ +/* + * Copyright (C) 2010 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#ifndef __LINUX_CLK_OMAP_H_ +#define __LINUX_CLK_OMAP_H_ + +int __init dt_omap_clk_init(void); + +#endif -- 1.8.1.2 _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
