+static struct snd_ac97_reset_cfg snd_ac97_rst_cfg;
+
+static void snd_soc_ac97_warm_reset(struct snd_ac97 *ac97)
+{
+ struct pinctrl *pctl = snd_ac97_rst_cfg.pctl;
+
+ pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_warm_reset);
+
+ gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 1);
+
+ udelay(10);
+
+ gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 0);
+
+ pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_run);
+ msleep(2);
+}
+
+static void snd_soc_ac97_reset(struct snd_ac97 *ac97)
+{
+ struct pinctrl *pctl = snd_ac97_rst_cfg.pctl;
+
+ pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_reset);
+
+ gpio_direction_output(snd_ac97_rst_cfg.gpio_sync, 0);
+ gpio_direction_output(snd_ac97_rst_cfg.gpio_sdata, 0);
+ gpio_direction_output(snd_ac97_rst_cfg.gpio_reset, 0);
+
+ udelay(10);
+
+ gpio_direction_output(snd_ac97_rst_cfg.gpio_reset, 1);
+
+ pinctrl_select_state(pctl, snd_ac97_rst_cfg.pstate_run);
+ msleep(2);
+}
+
+static int snd_soc_ac97_parse_pinctl(struct device *dev,
+ struct snd_ac97_reset_cfg *cfg)
+{
+ struct pinctrl *p;
+ struct pinctrl_state *state;
+ int gpio;
+ int ret;
+
+ p = devm_pinctrl_get(dev);
+ if (IS_ERR(p)) {
+ dev_err(dev, "Failed to get pinctrl\n");
+ return PTR_RET(p);
+ }
+ cfg->pctl = p;
+
+ state = pinctrl_lookup_state(p, "ac97-reset");
+ if (IS_ERR(state)) {
+ dev_err(dev, "Can't find pinctrl state ac97-reset\n");
+ return PTR_RET(state);
+ }
+ cfg->pstate_reset = state;
+
+ state = pinctrl_lookup_state(p, "ac97-warm-reset");
+ if (IS_ERR(state)) {
+ dev_err(dev, "Can't find pinctrl state ac97-warm-reset\n");
+ return PTR_RET(state);
+ }
+ cfg->pstate_warm_reset = state;
+
+ state = pinctrl_lookup_state(p, "ac97-running");
+ if (IS_ERR(state)) {
+ dev_err(dev, "Can't find pinctrl state ac97-running\n");
+ return PTR_RET(state);
+ }
+ cfg->pstate_run = state;
+
+ gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 0);
+ if (gpio < 0) {
+ dev_err(dev, "Can't find ac97-sync gpio\n");
+ return gpio;
+ }
+ ret = devm_gpio_request(dev, gpio, "AC97 link sync");
+ if (ret) {
+ dev_err(dev, "Failed requesting ac97-sync gpio\n");
+ return ret;
+ }
+ cfg->gpio_sync = gpio;
+
+ gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 1);
+ if (gpio < 0) {
+ dev_err(dev, "Can't find ac97-sdata gpio %d\n", gpio);
+ return gpio;
+ }
+ ret = devm_gpio_request(dev, gpio, "AC97 link sdata");
+ if (ret) {
+ dev_err(dev, "Failed requesting ac97-sdata gpio\n");
+ return ret;
+ }
+ cfg->gpio_sdata = gpio;
+
+ gpio = of_get_named_gpio(dev->of_node, "ac97-gpios", 2);
+ if (gpio < 0) {
+ dev_err(dev, "Can't find ac97-reset gpio\n");
+ return gpio;
+ }
+ ret = devm_gpio_request(dev, gpio, "AC97 link reset");
+ if (ret) {
+ dev_err(dev, "Failed requesting ac97-reset gpio\n");
+ return ret;
+ }
+ cfg->gpio_reset = gpio;
+
+ return 0;
+}
+