99 static void spear_adc_set_status(struct spear_adc_state *st, u32 val)  in spear_adc_set_status()  argument
101 	__raw_writel(val, &st->adc_base_spear6xx->status);  in spear_adc_set_status()
104 static void spear_adc_set_clk(struct spear_adc_state *st, u32 val)  in spear_adc_set_clk()  argument
107 	u32 apb_clk = clk_get_rate(st->clk);  in spear_adc_set_clk()
112 	st->current_clk = apb_clk / count;  in spear_adc_set_clk()
115 		     &st->adc_base_spear6xx->clk);  in spear_adc_set_clk()
118 static void spear_adc_set_ctrl(struct spear_adc_state *st, int n,  in spear_adc_set_ctrl()  argument
121 	__raw_writel(val, &st->adc_base_spear6xx->ch_ctrl[n]);  in spear_adc_set_ctrl()
124 static u32 spear_adc_get_average(struct spear_adc_state *st)  in spear_adc_get_average()  argument
126 	if (of_device_is_compatible(st->np, "st,spear600-adc")) {  in spear_adc_get_average()
127 		return __raw_readl(&st->adc_base_spear6xx->average.msb) &  in spear_adc_get_average()
130 		return __raw_readl(&st->adc_base_spear3xx->average) &  in spear_adc_get_average()
135 static void spear_adc_set_scanrate(struct spear_adc_state *st, u32 rate)  in spear_adc_set_scanrate()  argument
137 	if (of_device_is_compatible(st->np, "st,spear600-adc")) {  in spear_adc_set_scanrate()
139 			     &st->adc_base_spear6xx->scan_rate_lo);  in spear_adc_set_scanrate()
141 			     &st->adc_base_spear6xx->scan_rate_hi);  in spear_adc_set_scanrate()
143 		__raw_writel(rate, &st->adc_base_spear3xx->scan_rate);  in spear_adc_set_scanrate()
153 	struct spear_adc_state *st = iio_priv(indio_dev);  in spear_adc_read_raw()  local
158 		mutex_lock(&st->lock);  in spear_adc_read_raw()
161 			SPEAR_ADC_STATUS_AVG_SAMPLE(st->avg_samples) |  in spear_adc_read_raw()
164 		if (st->vref_external == 0)  in spear_adc_read_raw()
167 		spear_adc_set_status(st, status);  in spear_adc_read_raw()
168 		wait_for_completion(&st->completion); /* set by ISR */  in spear_adc_read_raw()
169 		*val = st->value;  in spear_adc_read_raw()
171 		mutex_unlock(&st->lock);  in spear_adc_read_raw()
176 		*val = st->vref_external;  in spear_adc_read_raw()
180 		*val = st->current_clk;  in spear_adc_read_raw()
193 	struct spear_adc_state *st = iio_priv(indio_dev);  in spear_adc_write_raw()  local
199 	mutex_lock(&st->lock);  in spear_adc_write_raw()
208 	spear_adc_set_clk(st, val);  in spear_adc_write_raw()
211 	mutex_unlock(&st->lock);  in spear_adc_write_raw()
237 	struct spear_adc_state *st = dev_id;  in spear_adc_isr()  local
240 	st->value = spear_adc_get_average(st);  in spear_adc_isr()
241 	complete(&st->completion);  in spear_adc_isr()
246 static int spear_adc_configure(struct spear_adc_state *st)  in spear_adc_configure()  argument
251 	spear_adc_set_status(st, 0);  in spear_adc_configure()
252 	__raw_writel(0, &st->adc_base_spear6xx->clk);  in spear_adc_configure()
254 		spear_adc_set_ctrl(st, i, 0);  in spear_adc_configure()
255 	spear_adc_set_scanrate(st, 0);  in spear_adc_configure()
257 	spear_adc_set_clk(st, st->sampling_freq);  in spear_adc_configure()
271 	struct spear_adc_state *st;  in spear_adc_probe()  local
282 	st = iio_priv(indio_dev);  in spear_adc_probe()
284 	mutex_init(&st->lock);  in spear_adc_probe()
286 	st->np = np;  in spear_adc_probe()
293 	st->adc_base_spear6xx = devm_platform_ioremap_resource(pdev, 0);  in spear_adc_probe()
294 	if (IS_ERR(st->adc_base_spear6xx))  in spear_adc_probe()
295 		return PTR_ERR(st->adc_base_spear6xx);  in spear_adc_probe()
297 	st->adc_base_spear3xx =  in spear_adc_probe()
298 		(struct adc_regs_spear3xx __iomem *)st->adc_base_spear6xx;  in spear_adc_probe()
300 	st->clk = devm_clk_get(dev, NULL);  in spear_adc_probe()
301 	if (IS_ERR(st->clk)) {  in spear_adc_probe()
303 		return PTR_ERR(st->clk);  in spear_adc_probe()
306 	ret = clk_prepare_enable(st->clk);  in spear_adc_probe()
319 			       st);  in spear_adc_probe()
326 				 &st->sampling_freq)) {  in spear_adc_probe()
336 	of_property_read_u32(np, "average-samples", &st->avg_samples);  in spear_adc_probe()
342 	of_property_read_u32(np, "vref-external", &st->vref_external);  in spear_adc_probe()
344 	spear_adc_configure(st);  in spear_adc_probe()
348 	init_completion(&st->completion);  in spear_adc_probe()
365 	clk_disable_unprepare(st->clk);  in spear_adc_probe()
372 	struct spear_adc_state *st = iio_priv(indio_dev);  in spear_adc_remove()  local
375 	clk_disable_unprepare(st->clk);  in spear_adc_remove()