1 // SPDX-License-Identifier: GPL-2.0-only
3  * Based on sound/arm/pxa2xx-ac97.c and sound/soc/pxa/pxa2xx-ac97.c
21 #include <sound/pxa2xx-lib.h>
24 #include <mach/regs-ac97.h>
48 	int val = -ENODEV;  in pxa2xx_ac97_read()
52 		return -ENODEV;  in pxa2xx_ac97_read()
59 	else  in pxa2xx_ac97_read()
73 		val = -ETIMEDOUT;  in pxa2xx_ac97_read()
99 	else  in pxa2xx_ac97_write()
110 		ret = -EIO;  in pxa2xx_ac97_write()
128 	GCR &=  GCR_COLD_RST;  /* clear everything but nCRST */  in pxa_ac97_cold_pxa25x()
152 	GCR &=  GCR_COLD_RST;  /* clear everything but nCRST */  in pxa_ac97_cold_pxa27x()
182 	GCR &=  GCR_COLD_RST;  /* clear everything but nCRST */  in pxa_ac97_cold_pxa3xx()
202 	else  in pxa2xx_ac97_try_warm_reset()
207 	else  in pxa2xx_ac97_try_warm_reset()
212 	else  in pxa2xx_ac97_try_warm_reset()
216 	while (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR)) && timeout--)  in pxa2xx_ac97_try_warm_reset()
239 	else  in pxa2xx_ac97_try_cold_reset()
244 	else  in pxa2xx_ac97_try_cold_reset()
249 	else  in pxa2xx_ac97_try_cold_reset()
253 	while (!((GSR | gsr_bits) & (GSR_PCR | GSR_SCR)) && timeout--)  in pxa2xx_ac97_try_cold_reset()
321 	pxa2xx_audio_ops_t *pdata = dev->dev.platform_data;  in pxa2xx_ac97_hw_probe()
324 		switch (pdata->reset_gpio) {  in pxa2xx_ac97_hw_probe()
327 			reset_gpio = pdata->reset_gpio;  in pxa2xx_ac97_hw_probe()
332 		case -1:  in pxa2xx_ac97_hw_probe()
335 			dev_err(&dev->dev, "Invalid reset GPIO %d\n",  in pxa2xx_ac97_hw_probe()
336 				pdata->reset_gpio);  in pxa2xx_ac97_hw_probe()
338 	} else if (!pdata && dev->dev.of_node) {  in pxa2xx_ac97_hw_probe()
339 		pdata = devm_kzalloc(&dev->dev, sizeof(*pdata), GFP_KERNEL);  in pxa2xx_ac97_hw_probe()
341 			return -ENOMEM;  in pxa2xx_ac97_hw_probe()
342 		pdata->reset_gpio = of_get_named_gpio(dev->dev.of_node,  in pxa2xx_ac97_hw_probe()
343 						      "reset-gpios", 0);  in pxa2xx_ac97_hw_probe()
344 		if (pdata->reset_gpio == -ENOENT)  in pxa2xx_ac97_hw_probe()
345 			pdata->reset_gpio = -1;  in pxa2xx_ac97_hw_probe()
346 		else if (pdata->reset_gpio < 0)  in pxa2xx_ac97_hw_probe()
347 			return pdata->reset_gpio;  in pxa2xx_ac97_hw_probe()
348 		reset_gpio = pdata->reset_gpio;  in pxa2xx_ac97_hw_probe()
349 	} else {  in pxa2xx_ac97_hw_probe()
356 		 * This gpio is needed for a work-around to a bug in the ac97  in pxa2xx_ac97_hw_probe()
370 		ac97conf_clk = clk_get(&dev->dev, "AC97CONFCLK");  in pxa2xx_ac97_hw_probe()
378 	ac97_clk = clk_get(&dev->dev, "AC97CLK");  in pxa2xx_ac97_hw_probe()