12aec85b2SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
22aec85b2SThomas Gleixner // Copyright (C) 2016 Broadcom
3daa5abc4SYendapally Reddy Dhananjaya Reddy
4daa5abc4SYendapally Reddy Dhananjaya Reddy #include <linux/clk.h>
5daa5abc4SYendapally Reddy Dhananjaya Reddy #include <linux/delay.h>
6daa5abc4SYendapally Reddy Dhananjaya Reddy #include <linux/err.h>
7daa5abc4SYendapally Reddy Dhananjaya Reddy #include <linux/io.h>
8daa5abc4SYendapally Reddy Dhananjaya Reddy #include <linux/math64.h>
9daa5abc4SYendapally Reddy Dhananjaya Reddy #include <linux/module.h>
10daa5abc4SYendapally Reddy Dhananjaya Reddy #include <linux/of.h>
11daa5abc4SYendapally Reddy Dhananjaya Reddy #include <linux/platform_device.h>
12daa5abc4SYendapally Reddy Dhananjaya Reddy #include <linux/pwm.h>
13daa5abc4SYendapally Reddy Dhananjaya Reddy
14daa5abc4SYendapally Reddy Dhananjaya Reddy #define IPROC_PWM_CTRL_OFFSET 0x00
15daa5abc4SYendapally Reddy Dhananjaya Reddy #define IPROC_PWM_CTRL_TYPE_SHIFT(ch) (15 + (ch))
16daa5abc4SYendapally Reddy Dhananjaya Reddy #define IPROC_PWM_CTRL_POLARITY_SHIFT(ch) (8 + (ch))
17daa5abc4SYendapally Reddy Dhananjaya Reddy #define IPROC_PWM_CTRL_EN_SHIFT(ch) (ch)
18daa5abc4SYendapally Reddy Dhananjaya Reddy
19daa5abc4SYendapally Reddy Dhananjaya Reddy #define IPROC_PWM_PERIOD_OFFSET(ch) (0x04 + ((ch) << 3))
20daa5abc4SYendapally Reddy Dhananjaya Reddy #define IPROC_PWM_PERIOD_MIN 0x02
21daa5abc4SYendapally Reddy Dhananjaya Reddy #define IPROC_PWM_PERIOD_MAX 0xffff
22daa5abc4SYendapally Reddy Dhananjaya Reddy
23daa5abc4SYendapally Reddy Dhananjaya Reddy #define IPROC_PWM_DUTY_CYCLE_OFFSET(ch) (0x08 + ((ch) << 3))
24daa5abc4SYendapally Reddy Dhananjaya Reddy #define IPROC_PWM_DUTY_CYCLE_MIN 0x00
25daa5abc4SYendapally Reddy Dhananjaya Reddy #define IPROC_PWM_DUTY_CYCLE_MAX 0xffff
26daa5abc4SYendapally Reddy Dhananjaya Reddy
27daa5abc4SYendapally Reddy Dhananjaya Reddy #define IPROC_PWM_PRESCALE_OFFSET 0x24
28daa5abc4SYendapally Reddy Dhananjaya Reddy #define IPROC_PWM_PRESCALE_BITS 0x06
29daa5abc4SYendapally Reddy Dhananjaya Reddy #define IPROC_PWM_PRESCALE_SHIFT(ch) ((3 - (ch)) * \
30daa5abc4SYendapally Reddy Dhananjaya Reddy IPROC_PWM_PRESCALE_BITS)
31daa5abc4SYendapally Reddy Dhananjaya Reddy #define IPROC_PWM_PRESCALE_MASK(ch) (IPROC_PWM_PRESCALE_MAX << \
32daa5abc4SYendapally Reddy Dhananjaya Reddy IPROC_PWM_PRESCALE_SHIFT(ch))
33daa5abc4SYendapally Reddy Dhananjaya Reddy #define IPROC_PWM_PRESCALE_MIN 0x00
34daa5abc4SYendapally Reddy Dhananjaya Reddy #define IPROC_PWM_PRESCALE_MAX 0x3f
35daa5abc4SYendapally Reddy Dhananjaya Reddy
36daa5abc4SYendapally Reddy Dhananjaya Reddy struct iproc_pwmc {
37daa5abc4SYendapally Reddy Dhananjaya Reddy struct pwm_chip chip;
38daa5abc4SYendapally Reddy Dhananjaya Reddy void __iomem *base;
39daa5abc4SYendapally Reddy Dhananjaya Reddy struct clk *clk;
40daa5abc4SYendapally Reddy Dhananjaya Reddy };
41daa5abc4SYendapally Reddy Dhananjaya Reddy
to_iproc_pwmc(struct pwm_chip * chip)42daa5abc4SYendapally Reddy Dhananjaya Reddy static inline struct iproc_pwmc *to_iproc_pwmc(struct pwm_chip *chip)
43daa5abc4SYendapally Reddy Dhananjaya Reddy {
44daa5abc4SYendapally Reddy Dhananjaya Reddy return container_of(chip, struct iproc_pwmc, chip);
45daa5abc4SYendapally Reddy Dhananjaya Reddy }
46daa5abc4SYendapally Reddy Dhananjaya Reddy
iproc_pwmc_enable(struct iproc_pwmc * ip,unsigned int channel)47daa5abc4SYendapally Reddy Dhananjaya Reddy static void iproc_pwmc_enable(struct iproc_pwmc *ip, unsigned int channel)
48daa5abc4SYendapally Reddy Dhananjaya Reddy {
49daa5abc4SYendapally Reddy Dhananjaya Reddy u32 value;
50daa5abc4SYendapally Reddy Dhananjaya Reddy
51daa5abc4SYendapally Reddy Dhananjaya Reddy value = readl(ip->base + IPROC_PWM_CTRL_OFFSET);
52daa5abc4SYendapally Reddy Dhananjaya Reddy value |= 1 << IPROC_PWM_CTRL_EN_SHIFT(channel);
53daa5abc4SYendapally Reddy Dhananjaya Reddy writel(value, ip->base + IPROC_PWM_CTRL_OFFSET);
54daa5abc4SYendapally Reddy Dhananjaya Reddy
55daa5abc4SYendapally Reddy Dhananjaya Reddy /* must be a 400 ns delay between clearing and setting enable bit */
56daa5abc4SYendapally Reddy Dhananjaya Reddy ndelay(400);
57daa5abc4SYendapally Reddy Dhananjaya Reddy }
58daa5abc4SYendapally Reddy Dhananjaya Reddy
iproc_pwmc_disable(struct iproc_pwmc * ip,unsigned int channel)59daa5abc4SYendapally Reddy Dhananjaya Reddy static void iproc_pwmc_disable(struct iproc_pwmc *ip, unsigned int channel)
60daa5abc4SYendapally Reddy Dhananjaya Reddy {
61daa5abc4SYendapally Reddy Dhananjaya Reddy u32 value;
62daa5abc4SYendapally Reddy Dhananjaya Reddy
63daa5abc4SYendapally Reddy Dhananjaya Reddy value = readl(ip->base + IPROC_PWM_CTRL_OFFSET);
64daa5abc4SYendapally Reddy Dhananjaya Reddy value &= ~(1 << IPROC_PWM_CTRL_EN_SHIFT(channel));
65daa5abc4SYendapally Reddy Dhananjaya Reddy writel(value, ip->base + IPROC_PWM_CTRL_OFFSET);
66daa5abc4SYendapally Reddy Dhananjaya Reddy
67daa5abc4SYendapally Reddy Dhananjaya Reddy /* must be a 400 ns delay between clearing and setting enable bit */
68daa5abc4SYendapally Reddy Dhananjaya Reddy ndelay(400);
69daa5abc4SYendapally Reddy Dhananjaya Reddy }
70daa5abc4SYendapally Reddy Dhananjaya Reddy
iproc_pwmc_get_state(struct pwm_chip * chip,struct pwm_device * pwm,struct pwm_state * state)716c452cffSUwe Kleine-König static int iproc_pwmc_get_state(struct pwm_chip *chip, struct pwm_device *pwm,
72daa5abc4SYendapally Reddy Dhananjaya Reddy struct pwm_state *state)
73daa5abc4SYendapally Reddy Dhananjaya Reddy {
74daa5abc4SYendapally Reddy Dhananjaya Reddy struct iproc_pwmc *ip = to_iproc_pwmc(chip);
75daa5abc4SYendapally Reddy Dhananjaya Reddy u64 tmp, multi, rate;
76daa5abc4SYendapally Reddy Dhananjaya Reddy u32 value, prescale;
77daa5abc4SYendapally Reddy Dhananjaya Reddy
78daa5abc4SYendapally Reddy Dhananjaya Reddy value = readl(ip->base + IPROC_PWM_CTRL_OFFSET);
79daa5abc4SYendapally Reddy Dhananjaya Reddy
80daa5abc4SYendapally Reddy Dhananjaya Reddy if (value & BIT(IPROC_PWM_CTRL_EN_SHIFT(pwm->hwpwm)))
81daa5abc4SYendapally Reddy Dhananjaya Reddy state->enabled = true;
82daa5abc4SYendapally Reddy Dhananjaya Reddy else
83daa5abc4SYendapally Reddy Dhananjaya Reddy state->enabled = false;
84daa5abc4SYendapally Reddy Dhananjaya Reddy
85daa5abc4SYendapally Reddy Dhananjaya Reddy if (value & BIT(IPROC_PWM_CTRL_POLARITY_SHIFT(pwm->hwpwm)))
86daa5abc4SYendapally Reddy Dhananjaya Reddy state->polarity = PWM_POLARITY_NORMAL;
87daa5abc4SYendapally Reddy Dhananjaya Reddy else
88daa5abc4SYendapally Reddy Dhananjaya Reddy state->polarity = PWM_POLARITY_INVERSED;
89daa5abc4SYendapally Reddy Dhananjaya Reddy
906ced5ff0SRayagonda Kokatanur rate = clk_get_rate(ip->clk);
916ced5ff0SRayagonda Kokatanur if (rate == 0) {
926ced5ff0SRayagonda Kokatanur state->period = 0;
936ced5ff0SRayagonda Kokatanur state->duty_cycle = 0;
946c452cffSUwe Kleine-König return 0;
956ced5ff0SRayagonda Kokatanur }
966ced5ff0SRayagonda Kokatanur
97daa5abc4SYendapally Reddy Dhananjaya Reddy value = readl(ip->base + IPROC_PWM_PRESCALE_OFFSET);
98daa5abc4SYendapally Reddy Dhananjaya Reddy prescale = value >> IPROC_PWM_PRESCALE_SHIFT(pwm->hwpwm);
99daa5abc4SYendapally Reddy Dhananjaya Reddy prescale &= IPROC_PWM_PRESCALE_MAX;
100daa5abc4SYendapally Reddy Dhananjaya Reddy
101daa5abc4SYendapally Reddy Dhananjaya Reddy multi = NSEC_PER_SEC * (prescale + 1);
102daa5abc4SYendapally Reddy Dhananjaya Reddy
103daa5abc4SYendapally Reddy Dhananjaya Reddy value = readl(ip->base + IPROC_PWM_PERIOD_OFFSET(pwm->hwpwm));
104daa5abc4SYendapally Reddy Dhananjaya Reddy tmp = (value & IPROC_PWM_PERIOD_MAX) * multi;
105daa5abc4SYendapally Reddy Dhananjaya Reddy state->period = div64_u64(tmp, rate);
106daa5abc4SYendapally Reddy Dhananjaya Reddy
107daa5abc4SYendapally Reddy Dhananjaya Reddy value = readl(ip->base + IPROC_PWM_DUTY_CYCLE_OFFSET(pwm->hwpwm));
108daa5abc4SYendapally Reddy Dhananjaya Reddy tmp = (value & IPROC_PWM_PERIOD_MAX) * multi;
109daa5abc4SYendapally Reddy Dhananjaya Reddy state->duty_cycle = div64_u64(tmp, rate);
1106c452cffSUwe Kleine-König
1116c452cffSUwe Kleine-König return 0;
112daa5abc4SYendapally Reddy Dhananjaya Reddy }
113daa5abc4SYendapally Reddy Dhananjaya Reddy
iproc_pwmc_apply(struct pwm_chip * chip,struct pwm_device * pwm,const struct pwm_state * state)114daa5abc4SYendapally Reddy Dhananjaya Reddy static int iproc_pwmc_apply(struct pwm_chip *chip, struct pwm_device *pwm,
11571523d18SUwe Kleine-König const struct pwm_state *state)
116daa5abc4SYendapally Reddy Dhananjaya Reddy {
117daa5abc4SYendapally Reddy Dhananjaya Reddy unsigned long prescale = IPROC_PWM_PRESCALE_MIN;
118daa5abc4SYendapally Reddy Dhananjaya Reddy struct iproc_pwmc *ip = to_iproc_pwmc(chip);
119daa5abc4SYendapally Reddy Dhananjaya Reddy u32 value, period, duty;
120daa5abc4SYendapally Reddy Dhananjaya Reddy u64 rate;
121daa5abc4SYendapally Reddy Dhananjaya Reddy
122daa5abc4SYendapally Reddy Dhananjaya Reddy rate = clk_get_rate(ip->clk);
123daa5abc4SYendapally Reddy Dhananjaya Reddy
124daa5abc4SYendapally Reddy Dhananjaya Reddy /*
125daa5abc4SYendapally Reddy Dhananjaya Reddy * Find period count, duty count and prescale to suit duty_cycle and
126daa5abc4SYendapally Reddy Dhananjaya Reddy * period. This is done according to formulas described below:
127daa5abc4SYendapally Reddy Dhananjaya Reddy *
128daa5abc4SYendapally Reddy Dhananjaya Reddy * period_ns = 10^9 * (PRESCALE + 1) * PC / PWM_CLK_RATE
129daa5abc4SYendapally Reddy Dhananjaya Reddy * duty_ns = 10^9 * (PRESCALE + 1) * DC / PWM_CLK_RATE
130daa5abc4SYendapally Reddy Dhananjaya Reddy *
131daa5abc4SYendapally Reddy Dhananjaya Reddy * PC = (PWM_CLK_RATE * period_ns) / (10^9 * (PRESCALE + 1))
132daa5abc4SYendapally Reddy Dhananjaya Reddy * DC = (PWM_CLK_RATE * duty_ns) / (10^9 * (PRESCALE + 1))
133daa5abc4SYendapally Reddy Dhananjaya Reddy */
134daa5abc4SYendapally Reddy Dhananjaya Reddy while (1) {
135daa5abc4SYendapally Reddy Dhananjaya Reddy u64 value, div;
136daa5abc4SYendapally Reddy Dhananjaya Reddy
137daa5abc4SYendapally Reddy Dhananjaya Reddy div = NSEC_PER_SEC * (prescale + 1);
138daa5abc4SYendapally Reddy Dhananjaya Reddy value = rate * state->period;
139daa5abc4SYendapally Reddy Dhananjaya Reddy period = div64_u64(value, div);
140daa5abc4SYendapally Reddy Dhananjaya Reddy value = rate * state->duty_cycle;
141daa5abc4SYendapally Reddy Dhananjaya Reddy duty = div64_u64(value, div);
142daa5abc4SYendapally Reddy Dhananjaya Reddy
1439443f2c8SLee Jones if (period < IPROC_PWM_PERIOD_MIN)
144daa5abc4SYendapally Reddy Dhananjaya Reddy return -EINVAL;
145daa5abc4SYendapally Reddy Dhananjaya Reddy
146daa5abc4SYendapally Reddy Dhananjaya Reddy if (period <= IPROC_PWM_PERIOD_MAX &&
147daa5abc4SYendapally Reddy Dhananjaya Reddy duty <= IPROC_PWM_DUTY_CYCLE_MAX)
148daa5abc4SYendapally Reddy Dhananjaya Reddy break;
149daa5abc4SYendapally Reddy Dhananjaya Reddy
150daa5abc4SYendapally Reddy Dhananjaya Reddy /* Otherwise, increase prescale and recalculate counts */
151daa5abc4SYendapally Reddy Dhananjaya Reddy if (++prescale > IPROC_PWM_PRESCALE_MAX)
152daa5abc4SYendapally Reddy Dhananjaya Reddy return -EINVAL;
153daa5abc4SYendapally Reddy Dhananjaya Reddy }
154daa5abc4SYendapally Reddy Dhananjaya Reddy
155daa5abc4SYendapally Reddy Dhananjaya Reddy iproc_pwmc_disable(ip, pwm->hwpwm);
156daa5abc4SYendapally Reddy Dhananjaya Reddy
157daa5abc4SYendapally Reddy Dhananjaya Reddy /* Set prescale */
158daa5abc4SYendapally Reddy Dhananjaya Reddy value = readl(ip->base + IPROC_PWM_PRESCALE_OFFSET);
159daa5abc4SYendapally Reddy Dhananjaya Reddy value &= ~IPROC_PWM_PRESCALE_MASK(pwm->hwpwm);
160daa5abc4SYendapally Reddy Dhananjaya Reddy value |= prescale << IPROC_PWM_PRESCALE_SHIFT(pwm->hwpwm);
161daa5abc4SYendapally Reddy Dhananjaya Reddy writel(value, ip->base + IPROC_PWM_PRESCALE_OFFSET);
162daa5abc4SYendapally Reddy Dhananjaya Reddy
163daa5abc4SYendapally Reddy Dhananjaya Reddy /* set period and duty cycle */
164daa5abc4SYendapally Reddy Dhananjaya Reddy writel(period, ip->base + IPROC_PWM_PERIOD_OFFSET(pwm->hwpwm));
165daa5abc4SYendapally Reddy Dhananjaya Reddy writel(duty, ip->base + IPROC_PWM_DUTY_CYCLE_OFFSET(pwm->hwpwm));
166daa5abc4SYendapally Reddy Dhananjaya Reddy
167daa5abc4SYendapally Reddy Dhananjaya Reddy /* set polarity */
168daa5abc4SYendapally Reddy Dhananjaya Reddy value = readl(ip->base + IPROC_PWM_CTRL_OFFSET);
169daa5abc4SYendapally Reddy Dhananjaya Reddy
170daa5abc4SYendapally Reddy Dhananjaya Reddy if (state->polarity == PWM_POLARITY_NORMAL)
171daa5abc4SYendapally Reddy Dhananjaya Reddy value |= 1 << IPROC_PWM_CTRL_POLARITY_SHIFT(pwm->hwpwm);
172daa5abc4SYendapally Reddy Dhananjaya Reddy else
173daa5abc4SYendapally Reddy Dhananjaya Reddy value &= ~(1 << IPROC_PWM_CTRL_POLARITY_SHIFT(pwm->hwpwm));
174daa5abc4SYendapally Reddy Dhananjaya Reddy
175daa5abc4SYendapally Reddy Dhananjaya Reddy writel(value, ip->base + IPROC_PWM_CTRL_OFFSET);
176daa5abc4SYendapally Reddy Dhananjaya Reddy
177daa5abc4SYendapally Reddy Dhananjaya Reddy if (state->enabled)
178daa5abc4SYendapally Reddy Dhananjaya Reddy iproc_pwmc_enable(ip, pwm->hwpwm);
179daa5abc4SYendapally Reddy Dhananjaya Reddy
180daa5abc4SYendapally Reddy Dhananjaya Reddy return 0;
181daa5abc4SYendapally Reddy Dhananjaya Reddy }
182daa5abc4SYendapally Reddy Dhananjaya Reddy
183daa5abc4SYendapally Reddy Dhananjaya Reddy static const struct pwm_ops iproc_pwm_ops = {
184daa5abc4SYendapally Reddy Dhananjaya Reddy .apply = iproc_pwmc_apply,
185daa5abc4SYendapally Reddy Dhananjaya Reddy .get_state = iproc_pwmc_get_state,
18624906a41SUwe Kleine-König .owner = THIS_MODULE,
187daa5abc4SYendapally Reddy Dhananjaya Reddy };
188daa5abc4SYendapally Reddy Dhananjaya Reddy
iproc_pwmc_probe(struct platform_device * pdev)189daa5abc4SYendapally Reddy Dhananjaya Reddy static int iproc_pwmc_probe(struct platform_device *pdev)
190daa5abc4SYendapally Reddy Dhananjaya Reddy {
191daa5abc4SYendapally Reddy Dhananjaya Reddy struct iproc_pwmc *ip;
192daa5abc4SYendapally Reddy Dhananjaya Reddy unsigned int i;
193daa5abc4SYendapally Reddy Dhananjaya Reddy u32 value;
194daa5abc4SYendapally Reddy Dhananjaya Reddy int ret;
195daa5abc4SYendapally Reddy Dhananjaya Reddy
196daa5abc4SYendapally Reddy Dhananjaya Reddy ip = devm_kzalloc(&pdev->dev, sizeof(*ip), GFP_KERNEL);
197daa5abc4SYendapally Reddy Dhananjaya Reddy if (!ip)
198daa5abc4SYendapally Reddy Dhananjaya Reddy return -ENOMEM;
199daa5abc4SYendapally Reddy Dhananjaya Reddy
200daa5abc4SYendapally Reddy Dhananjaya Reddy platform_set_drvdata(pdev, ip);
201daa5abc4SYendapally Reddy Dhananjaya Reddy
202daa5abc4SYendapally Reddy Dhananjaya Reddy ip->chip.dev = &pdev->dev;
203daa5abc4SYendapally Reddy Dhananjaya Reddy ip->chip.ops = &iproc_pwm_ops;
204daa5abc4SYendapally Reddy Dhananjaya Reddy ip->chip.npwm = 4;
205daa5abc4SYendapally Reddy Dhananjaya Reddy
206ed98401fSYangtao Li ip->base = devm_platform_ioremap_resource(pdev, 0);
207daa5abc4SYendapally Reddy Dhananjaya Reddy if (IS_ERR(ip->base))
208daa5abc4SYendapally Reddy Dhananjaya Reddy return PTR_ERR(ip->base);
209daa5abc4SYendapally Reddy Dhananjaya Reddy
210daa5abc4SYendapally Reddy Dhananjaya Reddy ip->clk = devm_clk_get(&pdev->dev, NULL);
211daa5abc4SYendapally Reddy Dhananjaya Reddy if (IS_ERR(ip->clk)) {
212daa5abc4SYendapally Reddy Dhananjaya Reddy dev_err(&pdev->dev, "failed to get clock: %ld\n",
213daa5abc4SYendapally Reddy Dhananjaya Reddy PTR_ERR(ip->clk));
214daa5abc4SYendapally Reddy Dhananjaya Reddy return PTR_ERR(ip->clk);
215daa5abc4SYendapally Reddy Dhananjaya Reddy }
216daa5abc4SYendapally Reddy Dhananjaya Reddy
217daa5abc4SYendapally Reddy Dhananjaya Reddy ret = clk_prepare_enable(ip->clk);
218daa5abc4SYendapally Reddy Dhananjaya Reddy if (ret < 0) {
219daa5abc4SYendapally Reddy Dhananjaya Reddy dev_err(&pdev->dev, "failed to enable clock: %d\n", ret);
220daa5abc4SYendapally Reddy Dhananjaya Reddy return ret;
221daa5abc4SYendapally Reddy Dhananjaya Reddy }
222daa5abc4SYendapally Reddy Dhananjaya Reddy
223daa5abc4SYendapally Reddy Dhananjaya Reddy /* Set full drive and normal polarity for all channels */
224daa5abc4SYendapally Reddy Dhananjaya Reddy value = readl(ip->base + IPROC_PWM_CTRL_OFFSET);
225daa5abc4SYendapally Reddy Dhananjaya Reddy
226daa5abc4SYendapally Reddy Dhananjaya Reddy for (i = 0; i < ip->chip.npwm; i++) {
227daa5abc4SYendapally Reddy Dhananjaya Reddy value &= ~(1 << IPROC_PWM_CTRL_TYPE_SHIFT(i));
228daa5abc4SYendapally Reddy Dhananjaya Reddy value |= 1 << IPROC_PWM_CTRL_POLARITY_SHIFT(i);
229daa5abc4SYendapally Reddy Dhananjaya Reddy }
230daa5abc4SYendapally Reddy Dhananjaya Reddy
231daa5abc4SYendapally Reddy Dhananjaya Reddy writel(value, ip->base + IPROC_PWM_CTRL_OFFSET);
232daa5abc4SYendapally Reddy Dhananjaya Reddy
233daa5abc4SYendapally Reddy Dhananjaya Reddy ret = pwmchip_add(&ip->chip);
234daa5abc4SYendapally Reddy Dhananjaya Reddy if (ret < 0) {
235daa5abc4SYendapally Reddy Dhananjaya Reddy dev_err(&pdev->dev, "failed to add PWM chip: %d\n", ret);
236daa5abc4SYendapally Reddy Dhananjaya Reddy clk_disable_unprepare(ip->clk);
237daa5abc4SYendapally Reddy Dhananjaya Reddy }
238daa5abc4SYendapally Reddy Dhananjaya Reddy
239daa5abc4SYendapally Reddy Dhananjaya Reddy return ret;
240daa5abc4SYendapally Reddy Dhananjaya Reddy }
241daa5abc4SYendapally Reddy Dhananjaya Reddy
iproc_pwmc_remove(struct platform_device * pdev)242*bbacca0eSUwe Kleine-König static void iproc_pwmc_remove(struct platform_device *pdev)
243daa5abc4SYendapally Reddy Dhananjaya Reddy {
244daa5abc4SYendapally Reddy Dhananjaya Reddy struct iproc_pwmc *ip = platform_get_drvdata(pdev);
245daa5abc4SYendapally Reddy Dhananjaya Reddy
246d4ac3917SUwe Kleine-König pwmchip_remove(&ip->chip);
247d4ac3917SUwe Kleine-König
248daa5abc4SYendapally Reddy Dhananjaya Reddy clk_disable_unprepare(ip->clk);
249daa5abc4SYendapally Reddy Dhananjaya Reddy }
250daa5abc4SYendapally Reddy Dhananjaya Reddy
251daa5abc4SYendapally Reddy Dhananjaya Reddy static const struct of_device_id bcm_iproc_pwmc_dt[] = {
252daa5abc4SYendapally Reddy Dhananjaya Reddy { .compatible = "brcm,iproc-pwm" },
253daa5abc4SYendapally Reddy Dhananjaya Reddy { },
254daa5abc4SYendapally Reddy Dhananjaya Reddy };
255daa5abc4SYendapally Reddy Dhananjaya Reddy MODULE_DEVICE_TABLE(of, bcm_iproc_pwmc_dt);
256daa5abc4SYendapally Reddy Dhananjaya Reddy
257daa5abc4SYendapally Reddy Dhananjaya Reddy static struct platform_driver iproc_pwmc_driver = {
258daa5abc4SYendapally Reddy Dhananjaya Reddy .driver = {
259daa5abc4SYendapally Reddy Dhananjaya Reddy .name = "bcm-iproc-pwm",
260daa5abc4SYendapally Reddy Dhananjaya Reddy .of_match_table = bcm_iproc_pwmc_dt,
261daa5abc4SYendapally Reddy Dhananjaya Reddy },
262daa5abc4SYendapally Reddy Dhananjaya Reddy .probe = iproc_pwmc_probe,
263*bbacca0eSUwe Kleine-König .remove_new = iproc_pwmc_remove,
264daa5abc4SYendapally Reddy Dhananjaya Reddy };
265daa5abc4SYendapally Reddy Dhananjaya Reddy module_platform_driver(iproc_pwmc_driver);
266daa5abc4SYendapally Reddy Dhananjaya Reddy
267daa5abc4SYendapally Reddy Dhananjaya Reddy MODULE_AUTHOR("Yendapally Reddy Dhananjaya Reddy <yendapally.reddy@broadcom.com>");
268daa5abc4SYendapally Reddy Dhananjaya Reddy MODULE_DESCRIPTION("Broadcom iProc PWM driver");
269daa5abc4SYendapally Reddy Dhananjaya Reddy MODULE_LICENSE("GPL v2");
270