Lines Matching +full:pwm +full:- +full:0
1 // SPDX-License-Identifier: GPL-2.0-only
12 #include <linux/pwm.h>
22 #define TWL_PWM_MAX 0x7f
25 #define TWL4030_GPBR1_REG 0x0c
26 #define TWL4030_PMBR1_REG 0x0d
29 #define TWL4030_PWMXCLK_ENABLE (1 << 0)
32 #define TWL4030_PWM_TOGGLE(pwm, x) ((x) << (pwm)) argument
35 #define TWL4030_GPIO6_PWM0_MUTE_MASK (0x03 << 2)
36 #define TWL4030_GPIO6_PWM0_MUTE_PWM0 (0x01 << 2)
37 #define TWL4030_GPIO7_VIBRASYNC_PWM1_MASK (0x03 << 4)
38 #define TWL4030_GPIO7_VIBRASYNC_PWM1_PWM1 (0x03 << 4)
41 #define TWL6030_TOGGLE3_REG 0x92
43 #define TWL6030_PWMXR (1 << 0)
46 #define TWL6030_PWM_TOGGLE(pwm, x) ((x) << (pwm * 3)) argument
60 static int twl_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm, in twl_pwm_config() argument
64 u8 pwm_config[2] = { 1, 0 }; in twl_pwm_config()
69 * On-cycle is set to 1 (the minimum allowed value) in twl_pwm_config()
70 * The off time of 0 is not configurable, so the mapping is: in twl_pwm_config()
71 * 0 -> off cycle = 2, in twl_pwm_config()
72 * 1 -> off cycle = 2, in twl_pwm_config()
73 * 2 -> off cycle = 3, in twl_pwm_config()
74 * 126 - > off cycle 127, in twl_pwm_config()
75 * 127 - > off cycle 1 in twl_pwm_config()
76 * When on cycle == off cycle the PWM will be always on in twl_pwm_config()
83 base = pwm->hwpwm * 3; in twl_pwm_config()
88 if (ret < 0) in twl_pwm_config()
89 dev_err(chip->dev, "%s: Failed to configure PWM\n", pwm->label); in twl_pwm_config()
94 static int twl4030_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm) in twl4030_pwm_enable() argument
100 mutex_lock(&twl->mutex); in twl4030_pwm_enable()
102 if (ret < 0) { in twl4030_pwm_enable()
103 dev_err(chip->dev, "%s: Failed to read GPBR1\n", pwm->label); in twl4030_pwm_enable()
107 val |= TWL4030_PWM_TOGGLE(pwm->hwpwm, TWL4030_PWMXCLK_ENABLE); in twl4030_pwm_enable()
110 if (ret < 0) in twl4030_pwm_enable()
111 dev_err(chip->dev, "%s: Failed to enable PWM\n", pwm->label); in twl4030_pwm_enable()
113 val |= TWL4030_PWM_TOGGLE(pwm->hwpwm, TWL4030_PWMX_ENABLE); in twl4030_pwm_enable()
116 if (ret < 0) in twl4030_pwm_enable()
117 dev_err(chip->dev, "%s: Failed to enable PWM\n", pwm->label); in twl4030_pwm_enable()
120 mutex_unlock(&twl->mutex); in twl4030_pwm_enable()
124 static void twl4030_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm) in twl4030_pwm_disable() argument
130 mutex_lock(&twl->mutex); in twl4030_pwm_disable()
132 if (ret < 0) { in twl4030_pwm_disable()
133 dev_err(chip->dev, "%s: Failed to read GPBR1\n", pwm->label); in twl4030_pwm_disable()
137 val &= ~TWL4030_PWM_TOGGLE(pwm->hwpwm, TWL4030_PWMX_ENABLE); in twl4030_pwm_disable()
140 if (ret < 0) in twl4030_pwm_disable()
141 dev_err(chip->dev, "%s: Failed to disable PWM\n", pwm->label); in twl4030_pwm_disable()
143 val &= ~TWL4030_PWM_TOGGLE(pwm->hwpwm, TWL4030_PWMXCLK_ENABLE); in twl4030_pwm_disable()
146 if (ret < 0) in twl4030_pwm_disable()
147 dev_err(chip->dev, "%s: Failed to disable PWM\n", pwm->label); in twl4030_pwm_disable()
150 mutex_unlock(&twl->mutex); in twl4030_pwm_disable()
153 static int twl4030_pwm_request(struct pwm_chip *chip, struct pwm_device *pwm) in twl4030_pwm_request() argument
159 if (pwm->hwpwm == 1) { in twl4030_pwm_request()
167 mutex_lock(&twl->mutex); in twl4030_pwm_request()
169 if (ret < 0) { in twl4030_pwm_request()
170 dev_err(chip->dev, "%s: Failed to read PMBR1\n", pwm->label); in twl4030_pwm_request()
174 /* Save the current MUX configuration for the PWM */ in twl4030_pwm_request()
175 twl->twl4030_pwm_mux &= ~mask; in twl4030_pwm_request()
176 twl->twl4030_pwm_mux |= (val & mask); in twl4030_pwm_request()
178 /* Select PWM functionality */ in twl4030_pwm_request()
183 if (ret < 0) in twl4030_pwm_request()
184 dev_err(chip->dev, "%s: Failed to request PWM\n", pwm->label); in twl4030_pwm_request()
187 mutex_unlock(&twl->mutex); in twl4030_pwm_request()
191 static void twl4030_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm) in twl4030_pwm_free() argument
197 if (pwm->hwpwm == 1) in twl4030_pwm_free()
202 mutex_lock(&twl->mutex); in twl4030_pwm_free()
204 if (ret < 0) { in twl4030_pwm_free()
205 dev_err(chip->dev, "%s: Failed to read PMBR1\n", pwm->label); in twl4030_pwm_free()
209 /* Restore the MUX configuration for the PWM */ in twl4030_pwm_free()
211 val |= (twl->twl4030_pwm_mux & mask); in twl4030_pwm_free()
214 if (ret < 0) in twl4030_pwm_free()
215 dev_err(chip->dev, "%s: Failed to free PWM\n", pwm->label); in twl4030_pwm_free()
218 mutex_unlock(&twl->mutex); in twl4030_pwm_free()
221 static int twl6030_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm) in twl6030_pwm_enable() argument
227 mutex_lock(&twl->mutex); in twl6030_pwm_enable()
228 val = twl->twl6030_toggle3; in twl6030_pwm_enable()
229 val |= TWL6030_PWM_TOGGLE(pwm->hwpwm, TWL6030_PWMXS | TWL6030_PWMXEN); in twl6030_pwm_enable()
230 val &= ~TWL6030_PWM_TOGGLE(pwm->hwpwm, TWL6030_PWMXR); in twl6030_pwm_enable()
233 if (ret < 0) { in twl6030_pwm_enable()
234 dev_err(chip->dev, "%s: Failed to enable PWM\n", pwm->label); in twl6030_pwm_enable()
238 twl->twl6030_toggle3 = val; in twl6030_pwm_enable()
240 mutex_unlock(&twl->mutex); in twl6030_pwm_enable()
244 static void twl6030_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm) in twl6030_pwm_disable() argument
250 mutex_lock(&twl->mutex); in twl6030_pwm_disable()
251 val = twl->twl6030_toggle3; in twl6030_pwm_disable()
252 val |= TWL6030_PWM_TOGGLE(pwm->hwpwm, TWL6030_PWMXR); in twl6030_pwm_disable()
253 val &= ~TWL6030_PWM_TOGGLE(pwm->hwpwm, TWL6030_PWMXS | TWL6030_PWMXEN); in twl6030_pwm_disable()
256 if (ret < 0) { in twl6030_pwm_disable()
257 dev_err(chip->dev, "%s: Failed to disable PWM\n", pwm->label); in twl6030_pwm_disable()
261 val |= TWL6030_PWM_TOGGLE(pwm->hwpwm, TWL6030_PWMXEN); in twl6030_pwm_disable()
264 if (ret < 0) { in twl6030_pwm_disable()
265 dev_err(chip->dev, "%s: Failed to disable PWM\n", pwm->label); in twl6030_pwm_disable()
269 val &= ~TWL6030_PWM_TOGGLE(pwm->hwpwm, TWL6030_PWMXEN); in twl6030_pwm_disable()
272 if (ret < 0) { in twl6030_pwm_disable()
273 dev_err(chip->dev, "%s: Failed to disable PWM\n", pwm->label); in twl6030_pwm_disable()
277 twl->twl6030_toggle3 = val; in twl6030_pwm_disable()
279 mutex_unlock(&twl->mutex); in twl6030_pwm_disable()
282 static int twl4030_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, in twl4030_pwm_apply() argument
287 if (state->polarity != PWM_POLARITY_NORMAL) in twl4030_pwm_apply()
288 return -EINVAL; in twl4030_pwm_apply()
290 if (!state->enabled) { in twl4030_pwm_apply()
291 if (pwm->state.enabled) in twl4030_pwm_apply()
292 twl4030_pwm_disable(chip, pwm); in twl4030_pwm_apply()
294 return 0; in twl4030_pwm_apply()
297 err = twl_pwm_config(pwm->chip, pwm, state->duty_cycle, state->period); in twl4030_pwm_apply()
301 if (!pwm->state.enabled) in twl4030_pwm_apply()
302 err = twl4030_pwm_enable(chip, pwm); in twl4030_pwm_apply()
307 static int twl6030_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, in twl6030_pwm_apply() argument
312 if (state->polarity != PWM_POLARITY_NORMAL) in twl6030_pwm_apply()
313 return -EINVAL; in twl6030_pwm_apply()
315 if (!state->enabled) { in twl6030_pwm_apply()
316 if (pwm->state.enabled) in twl6030_pwm_apply()
317 twl6030_pwm_disable(chip, pwm); in twl6030_pwm_apply()
319 return 0; in twl6030_pwm_apply()
322 err = twl_pwm_config(pwm->chip, pwm, state->duty_cycle, state->period); in twl6030_pwm_apply()
326 if (!pwm->state.enabled) in twl6030_pwm_apply()
327 err = twl6030_pwm_enable(chip, pwm); in twl6030_pwm_apply()
348 twl = devm_kzalloc(&pdev->dev, sizeof(*twl), GFP_KERNEL); in twl_pwm_probe()
350 return -ENOMEM; in twl_pwm_probe()
353 twl->chip.ops = &twl4030_pwm_ops; in twl_pwm_probe()
355 twl->chip.ops = &twl6030_pwm_ops; in twl_pwm_probe()
357 twl->chip.dev = &pdev->dev; in twl_pwm_probe()
358 twl->chip.npwm = 2; in twl_pwm_probe()
360 mutex_init(&twl->mutex); in twl_pwm_probe()
362 return devm_pwmchip_add(&pdev->dev, &twl->chip); in twl_pwm_probe()
367 { .compatible = "ti,twl4030-pwm" },
368 { .compatible = "ti,twl6030-pwm" },
376 .name = "twl-pwm",
384 MODULE_DESCRIPTION("PWM driver for TWL4030 and TWL6030");
385 MODULE_ALIAS("platform:twl-pwm");