1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Intel Low Power Subsystem PWM controller driver
5 * Copyright (C) 2014, Intel Corporation
7 * Derived from the original pwm-lpss.c
13 #include <linux/pwm.h>
14 #include <linux/types.h>
18 #define LPSS_MAX_PWMS 4
20 struct pwm_lpss_chip {
23 const struct pwm_lpss_boardinfo *info;
26 struct pwm_lpss_boardinfo {
27 unsigned long clk_rate;
29 unsigned long base_unit_bits;
31 * Some versions of the IP may stuck in the state machine if enable
32 * bit is not set, and hence update bit will show busy status till
33 * the reset. For the rest it may be otherwise.
37 * On some devices the _PS0/_PS3 AML code of the GPU (GFX0) device
38 * messes with the PWM0 controllers state,
40 bool other_devices_aml_touches_pwm_regs;
43 extern const struct pwm_lpss_boardinfo pwm_lpss_byt_info;
44 extern const struct pwm_lpss_boardinfo pwm_lpss_bsw_info;
45 extern const struct pwm_lpss_boardinfo pwm_lpss_bxt_info;
46 extern const struct pwm_lpss_boardinfo pwm_lpss_tng_info;
48 struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, void __iomem *base,
49 const struct pwm_lpss_boardinfo *info);
51 #endif /* __PWM_LPSS_H */