Commit ac49a192 authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Stephen Boyd
Browse files

clk: fractional-divider: Show numerator and denominator in debugfs 



It's very useful to see what are the values of the fractional divider.
For that, add respective debugfs files.

Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20221122130732.48537-2-andriy.shevchenko@linux.intel.com


Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent 7fffdb77

drivers/clk/clk-fractional-divider.c

+36 −0
Original line number Diff line number Diff line
@@ -39,6 +39,7 @@ 
 */



#include <linux/clk-provider.h>

#include <linux/debugfs.h>

#include <linux/io.h>

#include <linux/math.h>

#include <linux/module.h>
@@ -193,10 +194,45 @@ static int clk_fd_set_rate(struct clk_hw *hw, unsigned long rate, 
	return 0;

}



#ifdef CONFIG_DEBUG_FS

static int clk_fd_numerator_get(void *hw, u64 *val)

{

	struct u32_fract fract;



	clk_fd_get_div(hw, &fract);



	*val = fract.numerator;



	return 0;

}

DEFINE_DEBUGFS_ATTRIBUTE(clk_fd_numerator_fops, clk_fd_numerator_get, NULL, "%llu\n");



static int clk_fd_denominator_get(void *hw, u64 *val)

{

	struct u32_fract fract;



	clk_fd_get_div(hw, &fract);



	*val = fract.denominator;



	return 0;

}

DEFINE_DEBUGFS_ATTRIBUTE(clk_fd_denominator_fops, clk_fd_denominator_get, NULL, "%llu\n");



static void clk_fd_debug_init(struct clk_hw *hw, struct dentry *dentry)

{

	debugfs_create_file("numerator", 0444, dentry, hw, &clk_fd_numerator_fops);

	debugfs_create_file("denominator", 0444, dentry, hw, &clk_fd_denominator_fops);

}

#endif



const struct clk_ops clk_fractional_divider_ops = {

	.recalc_rate = clk_fd_recalc_rate,

	.round_rate = clk_fd_round_rate,

	.set_rate = clk_fd_set_rate,

#ifdef CONFIG_DEBUG_FS

	.debug_init = clk_fd_debug_init,

#endif

};

EXPORT_SYMBOL_GPL(clk_fractional_divider_ops);