drivers/mfd/stm32-lptimer.c

1 // SPDX-License-Identifier: GPL-2.0
3  * STM32 Low-Power Timer parent driver.
6  * Inspired by Benjamin Gaignard's stm32-timers driver
9 #include <linux/mfd/stm32-lptimer.h>
31 	 * Low-Power Timer supports it.  in stm32_lptimer_detect_encoder()
33 	ret = regmap_update_bits(ddata->regmap, STM32_LPTIM_CFGR,  in stm32_lptimer_detect_encoder()
38 	ret = regmap_read(ddata->regmap, STM32_LPTIM_CFGR, &val);  in stm32_lptimer_detect_encoder()
42 	ret = regmap_update_bits(ddata->regmap, STM32_LPTIM_CFGR,  in stm32_lptimer_detect_encoder()
47 	ddata->has_encoder = !!(val & STM32_LPTIM_ENC);  in stm32_lptimer_detect_encoder()
54 	struct device *dev = &pdev->dev;  in stm32_lptimer_probe()
61 		return -ENOMEM;  in stm32_lptimer_probe()
67 	ddata->regmap = devm_regmap_init_mmio_clk(dev, "mux", mmio,  in stm32_lptimer_probe()
69 	if (IS_ERR(ddata->regmap))  in stm32_lptimer_probe()
70 		return PTR_ERR(ddata->regmap);  in stm32_lptimer_probe()
72 	ddata->clk = devm_clk_get(dev, NULL);  in stm32_lptimer_probe()
73 	if (IS_ERR(ddata->clk))  in stm32_lptimer_probe()
74 		return PTR_ERR(ddata->clk);  in stm32_lptimer_probe()
82 	return devm_of_platform_populate(&pdev->dev);  in stm32_lptimer_probe()
86 	{ .compatible = "st,stm32-lptimer", },
94 		.name = "stm32-lptimer",
101 MODULE_DESCRIPTION("STMicroelectronics STM32 Low-Power Timer");
102 MODULE_ALIAS("platform:stm32-lptimer");