diff options
| author | Oder Chiou <oder_chiou@realtek.com> | 2020-05-04 15:40:07 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2020-05-04 16:23:23 +0100 |
| commit | c25504ad64fe391acb23dcfab039831c3825c17e (patch) | |
| tree | 572bf7b328ca988f5a7a6b3974014e3fecd240e3 /sound/soc/codecs/rl6231.c | |
| parent | e149ca29f3994ca79e9e77aa2f5b2e871e9f7c99 (diff) | |
| download | lwn-c25504ad64fe391acb23dcfab039831c3825c17e.tar.gz lwn-c25504ad64fe391acb23dcfab039831c3825c17e.zip | |
ASoC: rl6231: Add the K bypass for the PLL parameters
The patch adds the K bypass for the PLL parameters.
Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Link: https://lore.kernel.org/r/20200504074007.13002-2-oder_chiou@realtek.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs/rl6231.c')
| -rw-r--r-- | sound/soc/codecs/rl6231.c | 29 |
1 files changed, 19 insertions, 10 deletions
diff --git a/sound/soc/codecs/rl6231.c b/sound/soc/codecs/rl6231.c index d181c217d835..2586d1cafc0c 100644 --- a/sound/soc/codecs/rl6231.c +++ b/sound/soc/codecs/rl6231.c @@ -97,12 +97,13 @@ struct pll_calc_map { int n; int m; bool m_bp; + bool k_bp; }; static const struct pll_calc_map pll_preset_table[] = { - {19200000, 4096000, 23, 14, 1, false}, - {19200000, 24576000, 3, 30, 3, false}, - {3840000, 24576000, 3, 30, 0, true}, + {19200000, 4096000, 23, 14, 1, false, false}, + {19200000, 24576000, 3, 30, 3, false, false}, + {3840000, 24576000, 3, 30, 0, true, false}, }; static unsigned int find_best_div(unsigned int in, @@ -128,7 +129,7 @@ static unsigned int find_best_div(unsigned int in, * rl6231_pll_calc - Calcualte PLL M/N/K code. * @freq_in: external clock provided to codec. * @freq_out: target clock which codec works on. - * @pll_code: Pointer to structure with M, N, K and bypass flag. + * @pll_code: Pointer to structure with M, N, K, m_bypass and k_bypass flag. * * Calcualte M/N/K code to configure PLL for codec. * @@ -143,7 +144,7 @@ int rl6231_pll_calc(const unsigned int freq_in, unsigned int red, pll_out, in_t, out_t, div, div_t; unsigned int red_t = abs(freq_out - freq_in); unsigned int f_in, f_out, f_max; - bool bypass = false; + bool m_bypass = false, k_bypass = false; if (RL6231_PLL_INP_MAX < freq_in || RL6231_PLL_INP_MIN > freq_in) return -EINVAL; @@ -154,7 +155,8 @@ int rl6231_pll_calc(const unsigned int freq_in, 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; + m_bypass = pll_preset_table[i].m_bp; + k_bypass = pll_preset_table[i].k_bp; pr_debug("Use preset PLL parameter table\n"); goto code_find; } @@ -172,12 +174,14 @@ int rl6231_pll_calc(const unsigned int freq_in, f_in = freq_in / div; f_out = freq_out / div; k = min_k; + if (min_k < -1) + min_k = -1; for (k_t = min_k; k_t <= max_k; k_t++) { for (n_t = 0; n_t <= max_n; n_t++) { in_t = f_in * (n_t + 2); pll_out = f_out * (k_t + 2); if (in_t == pll_out) { - bypass = true; + m_bypass = true; n = n_t; k = k_t; goto code_find; @@ -185,7 +189,7 @@ int rl6231_pll_calc(const unsigned int freq_in, out_t = in_t / (k_t + 2); red = abs(f_out - out_t); if (red < red_t) { - bypass = true; + m_bypass = true; n = n_t; m = 0; k = k_t; @@ -197,7 +201,7 @@ int rl6231_pll_calc(const unsigned int freq_in, out_t = in_t / ((m_t + 2) * (k_t + 2)); red = abs(f_out - out_t); if (red < red_t) { - bypass = false; + m_bypass = false; n = n_t; m = m_t; k = k_t; @@ -211,8 +215,13 @@ int rl6231_pll_calc(const unsigned int freq_in, pr_debug("Only get approximation about PLL\n"); code_find: + if (k == -1) { + k_bypass = true; + k = 0; + } - pll_code->m_bp = bypass; + pll_code->m_bp = m_bypass; + pll_code->k_bp = k_bypass; pll_code->m_code = m; pll_code->n_code = n; pll_code->k_code = k; |