diff options
author | Tero Kristo <t-kristo@ti.com> | 2013-09-13 15:57:59 +0400 |
---|---|---|
committer | Mike Turquette <mturquette@linaro.org> | 2014-01-18 00:35:07 +0400 |
commit | 1f847c65fd569c1d822800ba3e7e18c6411a7d50 (patch) | |
tree | b735f09c69ac53da98cd4ffe8bb32a53abca573d /drivers | |
parent | b4761198bfaf29649dc58a48e8b123ea4174ba95 (diff) | |
download | linux-1f847c65fd569c1d822800ba3e7e18c6411a7d50.tar.xz |
clk: ti: add support for TI fixed factor clock
This behaves exactly in similar manner to basic fixed-factor-clock, but
adds a few properties on top for handling clock hardware autoidling.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/clk/ti/Makefile | 3 | ||||
-rw-r--r-- | drivers/clk/ti/fixed-factor.c | 66 |
2 files changed, 68 insertions, 1 deletions
diff --git a/drivers/clk/ti/Makefile b/drivers/clk/ti/Makefile index 8690b0b442c0..d3586252a391 100644 --- a/drivers/clk/ti/Makefile +++ b/drivers/clk/ti/Makefile @@ -1,4 +1,5 @@ ifneq ($(CONFIG_OF),) obj-y += clk.o autoidle.o -clk-common = dpll.o composite.o divider.o +clk-common = dpll.o composite.o divider.o \ + fixed-factor.o endif diff --git a/drivers/clk/ti/fixed-factor.c b/drivers/clk/ti/fixed-factor.c new file mode 100644 index 000000000000..c2c8a287408c --- /dev/null +++ b/drivers/clk/ti/fixed-factor.c @@ -0,0 +1,66 @@ +/* + * TI Fixed Factor Clock + * + * Copyright (C) 2013 Texas Instruments, Inc. + * + * Tero Kristo <t-kristo@ti.com> + * + * 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/slab.h> +#include <linux/err.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/clk/ti.h> + +#undef pr_fmt +#define pr_fmt(fmt) "%s: " fmt, __func__ + +/** + * of_ti_fixed_factor_clk_setup - Setup function for TI fixed factor clock + * @node: device node for this clock + * + * Sets up a simple fixed factor clock based on device tree info. + */ +static void __init of_ti_fixed_factor_clk_setup(struct device_node *node) +{ + struct clk *clk; + const char *clk_name = node->name; + const char *parent_name; + u32 div, mult; + u32 flags = 0; + + if (of_property_read_u32(node, "ti,clock-div", &div)) { + pr_err("%s must have a clock-div property\n", node->name); + return; + } + + if (of_property_read_u32(node, "ti,clock-mult", &mult)) { + pr_err("%s must have a clock-mult property\n", node->name); + return; + } + + if (of_property_read_bool(node, "ti,set-rate-parent")) + flags |= CLK_SET_RATE_PARENT; + + parent_name = of_clk_get_parent_name(node, 0); + + clk = clk_register_fixed_factor(NULL, clk_name, parent_name, flags, + mult, div); + + if (!IS_ERR(clk)) { + of_clk_add_provider(node, of_clk_src_simple_get, clk); + of_ti_clk_autoidle_setup(node); + } +} +CLK_OF_DECLARE(ti_fixed_factor_clk, "ti,fixed-factor-clock", + of_ti_fixed_factor_clk_setup); |