drivers: sh: clk: Remove obsolete and unused clk_round_parent()

clk_round_parent() was only ever used by AP4EVB, until commit
b24bd7e97b3784af ("ARM: shmobile: Remove AP4EVB board support").

The Common Clock Framework does not provide clk_round_parent(), hence
remove it.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

2 files changed, 0 insertions, 92 deletions

diff --git a/drivers/sh/clk/core.c b/drivers/sh/clk/core.c
index be56b22ca941..6bf973bd9654 100644
--- a/drivers/sh/clk/core.c
+++ b/drivers/sh/clk/core.c
@@ -555,94 +555,6 @@ long clk_round_rate(struct clk *clk, unsigned long rate)
 }
 EXPORT_SYMBOL_GPL(clk_round_rate);
 
-long clk_round_parent(struct clk *clk, unsigned long target,
-                      unsigned long *best_freq, unsigned long *parent_freq,
-                      unsigned int div_min, unsigned int div_max)
-{
-        struct cpufreq_frequency_table *freq, *best = NULL;
-        unsigned long error = ULONG_MAX, freq_high, freq_low, div;
-        struct clk *parent = clk_get_parent(clk);
-
-        if (!parent) {
-                *parent_freq = 0;
-                *best_freq = clk_round_rate(clk, target);
-                return abs(target - *best_freq);
-        }
-
-        cpufreq_for_each_valid_entry(freq, parent->freq_table) {
-                if (unlikely(freq->frequency / target <= div_min - 1)) {
-                        unsigned long freq_max;
-
-                        freq_max = (freq->frequency + div_min / 2) / div_min;
-                        if (error > target - freq_max) {
-                                error = target - freq_max;
-                                best = freq;
-                                if (best_freq)
-                                        *best_freq = freq_max;
-                        }
-
-                        pr_debug("too low freq %u, error %lu\n", freq->frequency,
-                                 target - freq_max);
-
-                        if (!error)
-                                break;
-
-                        continue;
-                }
-
-                if (unlikely(freq->frequency / target >= div_max)) {
-                        unsigned long freq_min;
-
-                        freq_min = (freq->frequency + div_max / 2) / div_max;
-                        if (error > freq_min - target) {
-                                error = freq_min - target;
-                                best = freq;
-                                if (best_freq)
-                                        *best_freq = freq_min;
-                        }
-
-                        pr_debug("too high freq %u, error %lu\n", freq->frequency,
-                                 freq_min - target);
-
-                        if (!error)
-                                break;
-
-                        continue;
-                }
-
-                div = freq->frequency / target;
-                freq_high = freq->frequency / div;
-                freq_low = freq->frequency / (div + 1);
-
-                if (freq_high - target < error) {
-                        error = freq_high - target;
-                        best = freq;
-                        if (best_freq)
-                                *best_freq = freq_high;
-                }
-
-                if (target - freq_low < error) {
-                        error = target - freq_low;
-                        best = freq;
-                        if (best_freq)
-                                *best_freq = freq_low;
-                }
-
-                pr_debug("%u / %lu = %lu, / %lu = %lu, best %lu, parent %u\n",
-                         freq->frequency, div, freq_high, div + 1, freq_low,
-                         *best_freq, best->frequency);
-
-                if (!error)
-                        break;
-        }
-
-        if (parent_freq)
-                *parent_freq = best->frequency;
-
-        return error;
-}
-EXPORT_SYMBOL_GPL(clk_round_parent);
-
 #ifdef CONFIG_PM
 static void clks_core_resume(void)
 {
diff --git a/include/linux/sh_clk.h b/include/linux/sh_clk.h
index 1f208b2a1ed6..645896b81244 100644
--- a/include/linux/sh_clk.h
+++ b/include/linux/sh_clk.h
@@ -113,10 +113,6 @@ long clk_rate_div_range_round(struct clk *clk, unsigned int div_min,
 long clk_rate_mult_range_round(struct clk *clk, unsigned int mult_min,
                                unsigned int mult_max, unsigned long rate);
 
-long clk_round_parent(struct clk *clk, unsigned long target,
-                      unsigned long *best_freq, unsigned long *parent_freq,
-                      unsigned int div_min, unsigned int div_max);
-
 #define SH_CLK_MSTP(_parent, _enable_reg, _enable_bit, _status_reg, _flags) \
 {                                                                       \
         .parent         = _parent,                                      \