diff options
Diffstat (limited to '')
-rw-r--r-- | drivers/clk/ti/fixed-factor.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/drivers/clk/ti/fixed-factor.c b/drivers/clk/ti/fixed-factor.c new file mode 100644 index 000000000..c102c5320 --- /dev/null +++ b/drivers/clk/ti/fixed-factor.c @@ -0,0 +1,61 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * TI Fixed Factor Clock + * + * Copyright (C) 2013 Texas Instruments, Inc. + * + * Tero Kristo <t-kristo@ti.com> + */ + +#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> + +#include "clock.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 = ti_dt_clk_name(node); + const char *parent_name; + u32 div, mult; + u32 flags = 0; + + if (of_property_read_u32(node, "ti,clock-div", &div)) { + pr_err("%pOFn must have a clock-div property\n", node); + return; + } + + if (of_property_read_u32(node, "ti,clock-mult", &mult)) { + pr_err("%pOFn must have a clock-mult property\n", node); + 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); + ti_clk_add_alias(clk, clk_name); + } +} +CLK_OF_DECLARE(ti_fixed_factor_clk, "ti,fixed-factor-clock", + of_ti_fixed_factor_clk_setup); |