ASoC: rl6231: add pll preset table

[cascardo/linux.git] / sound / soc / codecs / rl6231.c

diff --git a/sound/soc/codecs/rl6231.c b/sound/soc/codecs/rl6231.c
index 56650d6..96f3e90 100644 (file)
--- a/sound/soc/codecs/rl6231.c
+++ b/sound/soc/codecs/rl6231.c
@@ -43,6 +43,19 @@ int rl6231_calc_dmic_clk(int rate)
 }
 EXPORT_SYMBOL_GPL(rl6231_calc_dmic_clk);
 
+struct pll_calc_map {
+       unsigned int pll_in;
+       unsigned int pll_out;
+       int k;
+       int n;
+       int m;
+       bool m_bp;
+};
+
+static const struct pll_calc_map pll_preset_table[] = {
+       {19200000,  24576000,  3, 30, 3, false},
+};
+
 /**
  * rl6231_pll_calc - Calcualte PLL M/N/K code.
  * @freq_in: external clock provided to codec.
@@ -57,7 +70,7 @@ int rl6231_pll_calc(const unsigned int freq_in,
        const unsigned int freq_out, struct rl6231_pll_code *pll_code)
 {
        int max_n = RL6231_PLL_N_MAX, max_m = RL6231_PLL_M_MAX;
-       int k, red, n_t, pll_out, in_t, out_t;
+       int i, k, red, n_t, pll_out, in_t, out_t;
        int n = 0, m = 0, m_t = 0;
        int red_t = abs(freq_out - freq_in);
        bool bypass = false;
@@ -65,6 +78,18 @@ int rl6231_pll_calc(const unsigned int freq_in,
        if (RL6231_PLL_INP_MAX < freq_in || RL6231_PLL_INP_MIN > freq_in)
                return -EINVAL;
 
+       for (i = 0; i < ARRAY_SIZE(pll_preset_table); i++) {
+               if (freq_in == pll_preset_table[i].pll_in &&
+                       freq_out == pll_preset_table[i].pll_out) {
+                       k = pll_preset_table[i].k;
+                       m = pll_preset_table[i].m;
+                       n = pll_preset_table[i].n;
+                       bypass = pll_preset_table[i].m_bp;
+                       pr_debug("Use preset PLL parameter table\n");
+                       goto code_find;
+               }
+       }
+
        k = 100000000 / freq_out - 2;
        if (k > RL6231_PLL_K_MAX)
                k = RL6231_PLL_K_MAX;