3  * STM32 Low-Power Timer Encoder and Counter driver
14 #include <linux/counter.h>
100 	/* Setup LP timer encoder/counter and polarity, without prescaler */  in stm32_lptim_setup()
140 static int stm32_lptim_cnt_read(struct counter_device *counter,  in stm32_lptim_cnt_read()  argument
143 	struct stm32_lptim_cnt *const priv = counter_priv(counter);  in stm32_lptim_cnt_read()
156 static int stm32_lptim_cnt_function_read(struct counter_device *counter,  in stm32_lptim_cnt_function_read()  argument
160 	struct stm32_lptim_cnt *const priv = counter_priv(counter);  in stm32_lptim_cnt_function_read()
175 static int stm32_lptim_cnt_function_write(struct counter_device *counter,  in stm32_lptim_cnt_function_write()  argument
179 	struct stm32_lptim_cnt *const priv = counter_priv(counter);  in stm32_lptim_cnt_function_write()
198 static int stm32_lptim_cnt_enable_read(struct counter_device *counter,  in stm32_lptim_cnt_enable_read()  argument
202 	struct stm32_lptim_cnt *const priv = counter_priv(counter);  in stm32_lptim_cnt_enable_read()
214 static int stm32_lptim_cnt_enable_write(struct counter_device *counter,  in stm32_lptim_cnt_enable_write()  argument
218 	struct stm32_lptim_cnt *const priv = counter_priv(counter);  in stm32_lptim_cnt_enable_write()
239 static int stm32_lptim_cnt_ceiling_read(struct counter_device *counter,  in stm32_lptim_cnt_ceiling_read()  argument
243 	struct stm32_lptim_cnt *const priv = counter_priv(counter);  in stm32_lptim_cnt_ceiling_read()
250 static int stm32_lptim_cnt_ceiling_write(struct counter_device *counter,  in stm32_lptim_cnt_ceiling_write()  argument
254 	struct stm32_lptim_cnt *const priv = counter_priv(counter);  in stm32_lptim_cnt_ceiling_write()
274 static int stm32_lptim_cnt_action_read(struct counter_device *counter,  in stm32_lptim_cnt_action_read()  argument
279 	struct stm32_lptim_cnt *const priv = counter_priv(counter);  in stm32_lptim_cnt_action_read()
283 	err = stm32_lptim_cnt_function_read(counter, count, &function);  in stm32_lptim_cnt_action_read()
289 		/* LP Timer acts as up-counter on input 1 */  in stm32_lptim_cnt_action_read()
318 static int stm32_lptim_cnt_action_write(struct counter_device *counter,  in stm32_lptim_cnt_action_write()  argument
323 	struct stm32_lptim_cnt *const priv = counter_priv(counter);  in stm32_lptim_cnt_action_write()
330 	err = stm32_lptim_cnt_function_read(counter, count, &function);  in stm32_lptim_cnt_action_write()
334 	/* only set polarity when in counter mode (on input 1) */  in stm32_lptim_cnt_action_write()
398 /* LP timer without encoder (counter only) */
413 	struct counter_device *counter;  in stm32_lptim_cnt_probe()  local
420 	counter = devm_counter_alloc(&pdev->dev, sizeof(*priv));  in stm32_lptim_cnt_probe()
421 	if (!counter)  in stm32_lptim_cnt_probe()
423 	priv = counter_priv(counter);  in stm32_lptim_cnt_probe()
430 	/* Initialize Counter device */  in stm32_lptim_cnt_probe()
431 	counter->name = dev_name(&pdev->dev);  in stm32_lptim_cnt_probe()
432 	counter->parent = &pdev->dev;  in stm32_lptim_cnt_probe()
433 	counter->ops = &stm32_lptim_cnt_ops;  in stm32_lptim_cnt_probe()
435 		counter->counts = &stm32_lptim_enc_counts;  in stm32_lptim_cnt_probe()
436 		counter->num_signals = ARRAY_SIZE(stm32_lptim_cnt_signals);  in stm32_lptim_cnt_probe()
438 		counter->counts = &stm32_lptim_in1_counts;  in stm32_lptim_cnt_probe()
439 		counter->num_signals = 1;  in stm32_lptim_cnt_probe()
441 	counter->num_counts = 1;  in stm32_lptim_cnt_probe()
442 	counter->signals = stm32_lptim_cnt_signals;  in stm32_lptim_cnt_probe()
446 	ret = devm_counter_add(&pdev->dev, counter);  in stm32_lptim_cnt_probe()
448 		return dev_err_probe(&pdev->dev, ret, "Failed to add counter\n");  in stm32_lptim_cnt_probe()
459 	/* Only take care of enabled counter: don't disturb other MFD child */  in stm32_lptim_cnt_suspend()
504 	{ .compatible = "st,stm32-lptimer-counter", },
512 		.name = "stm32-lptimer-counter",
520 MODULE_ALIAS("platform:stm32-lptimer-counter");
521 MODULE_DESCRIPTION("STMicroelectronics STM32 LPTIM counter driver");
523 MODULE_IMPORT_NS(COUNTER);