3  * wm8978.c  --  WM8978 ALSA SoC Audio Codec driver
28 #include "wm8978.h"
425 			 "WM8978 N value exceeds recommended range! N = %u\n",  in pll_factors()
469  * "PLL and Clock Select Circuit" in WM8978 datasheet Rev. 2.6
473 	struct wm8978_priv *wm8978 = snd_soc_component_get_drvdata(component);  in wm8978_configure_pll()  local
475 	unsigned int f_opclk = wm8978->f_opclk, f_mclk = wm8978->f_mclk,  in wm8978_configure_pll()
476 		f_256fs = wm8978->f_256fs;  in wm8978_configure_pll()
485 		wm8978->mclk_idx = -1;  in wm8978_configure_pll()
510 		wm8978->f_pllout = f_opclk * opclk_div;  in wm8978_configure_pll()
522 		int idx = wm8978_enum_mclk(f_256fs, f_mclk, &wm8978->f_pllout);  in wm8978_configure_pll()
526 		wm8978->mclk_idx = idx;  in wm8978_configure_pll()
531 	f2 = wm8978->f_pllout * 4;  in wm8978_configure_pll()
534 		wm8978->f_mclk, wm8978->f_pllout);  in wm8978_configure_pll()
536 	pll_factors(component, &pll_div, f2, wm8978->f_mclk);  in wm8978_configure_pll()
560  * Configure WM8978 clock dividers.
566 	struct wm8978_priv *wm8978 = snd_soc_component_get_drvdata(component);  in wm8978_set_dai_clkdiv()  local
571 		wm8978->f_opclk = div;  in wm8978_set_dai_clkdiv()
573 		if (wm8978->f_mclk)  in wm8978_set_dai_clkdiv()
611 	struct wm8978_priv *wm8978 = snd_soc_component_get_drvdata(component);  in wm8978_set_dai_sysclk()  local
617 		wm8978->f_mclk = freq;  in wm8978_set_dai_sysclk()
620 		if (wm8978->f_opclk)  in wm8978_set_dai_sysclk()
626 			wm8978->sysclk = clk_id;  in wm8978_set_dai_sysclk()
629 	if (wm8978->sysclk == WM8978_PLL && (!freq || clk_id == WM8978_MCLK)) {  in wm8978_set_dai_sysclk()
638 		wm8978->sysclk = WM8978_MCLK;  in wm8978_set_dai_sysclk()
639 		wm8978->f_pllout = 0;  in wm8978_set_dai_sysclk()
640 		wm8978->f_opclk = 0;  in wm8978_set_dai_sysclk()
721 	struct wm8978_priv *wm8978 = snd_soc_component_get_drvdata(component);  in wm8978_hw_params()  local
732 	if (!wm8978->f_mclk)  in wm8978_hw_params()
773 	wm8978->f_256fs = params_rate(params) * 256;  in wm8978_hw_params()
775 	if (wm8978->sysclk == WM8978_MCLK) {  in wm8978_hw_params()
776 		wm8978->mclk_idx = -1;  in wm8978_hw_params()
777 		f_sel = wm8978->f_mclk;  in wm8978_hw_params()
779 		if (!wm8978->f_opclk) {  in wm8978_hw_params()
785 		f_sel = wm8978->f_pllout;  in wm8978_hw_params()
788 	if (wm8978->mclk_idx < 0) {  in wm8978_hw_params()
790 		if (f_sel < wm8978->f_256fs || f_sel > 12 * wm8978->f_256fs)  in wm8978_hw_params()
794 			diff = abs(wm8978->f_256fs * 3 -  in wm8978_hw_params()
807 		best = wm8978->mclk_idx;  in wm8978_hw_params()
814 			wm8978->sysclk == WM8978_MCLK ?  in wm8978_hw_params()
826 	if (wm8978->sysclk != current_clk_id) {  in wm8978_hw_params()
827 		if (wm8978->sysclk == WM8978_PLL)  in wm8978_hw_params()
905 	.name = "wm8978-hifi",
926 	struct wm8978_priv *wm8978 = snd_soc_component_get_drvdata(component);  in wm8978_suspend()  local
932 	regcache_mark_dirty(wm8978->regmap);  in wm8978_suspend()
939 	struct wm8978_priv *wm8978 = snd_soc_component_get_drvdata(component);  in wm8978_resume()  local
942 	regcache_sync(wm8978->regmap);  in wm8978_resume()
946 	if (wm8978->f_pllout)  in wm8978_resume()
974 	struct wm8978_priv *wm8978 = snd_soc_component_get_drvdata(component);  in wm8978_probe()  local
981 	wm8978->sysclk = WM8978_PLL;  in wm8978_probe()
1024 	struct wm8978_priv *wm8978;  in wm8978_i2c_probe()  local
1027 	wm8978 = devm_kzalloc(&i2c->dev, sizeof(struct wm8978_priv),  in wm8978_i2c_probe()
1029 	if (wm8978 == NULL)  in wm8978_i2c_probe()
1032 	wm8978->regmap = devm_regmap_init_i2c(i2c, &wm8978_regmap_config);  in wm8978_i2c_probe()
1033 	if (IS_ERR(wm8978->regmap)) {  in wm8978_i2c_probe()
1034 		ret = PTR_ERR(wm8978->regmap);  in wm8978_i2c_probe()
1039 	i2c_set_clientdata(i2c, wm8978);  in wm8978_i2c_probe()
1042 	ret = regmap_write(wm8978->regmap, WM8978_RESET, 0);  in wm8978_i2c_probe()
1059 	{ "wm8978" },
1065 	{ .compatible = "wlf,wm8978", },
1072 		.name = "wm8978",
1081 MODULE_DESCRIPTION("ASoC WM8978 codec driver");