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 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 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 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 71*6c452cffSUwe 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; 94*6c452cffSUwe 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); 110*6c452cffSUwe Kleine-König 111*6c452cffSUwe Kleine-König return 0; 112daa5abc4SYendapally Reddy Dhananjaya Reddy } 113daa5abc4SYendapally Reddy Dhananjaya Reddy 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 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 242daa5abc4SYendapally Reddy Dhananjaya Reddy static int 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 250d4ac3917SUwe Kleine-König return 0; 251daa5abc4SYendapally Reddy Dhananjaya Reddy } 252daa5abc4SYendapally Reddy Dhananjaya Reddy 253daa5abc4SYendapally Reddy Dhananjaya Reddy static const struct of_device_id bcm_iproc_pwmc_dt[] = { 254daa5abc4SYendapally Reddy Dhananjaya Reddy { .compatible = "brcm,iproc-pwm" }, 255daa5abc4SYendapally Reddy Dhananjaya Reddy { }, 256daa5abc4SYendapally Reddy Dhananjaya Reddy }; 257daa5abc4SYendapally Reddy Dhananjaya Reddy MODULE_DEVICE_TABLE(of, bcm_iproc_pwmc_dt); 258daa5abc4SYendapally Reddy Dhananjaya Reddy 259daa5abc4SYendapally Reddy Dhananjaya Reddy static struct platform_driver iproc_pwmc_driver = { 260daa5abc4SYendapally Reddy Dhananjaya Reddy .driver = { 261daa5abc4SYendapally Reddy Dhananjaya Reddy .name = "bcm-iproc-pwm", 262daa5abc4SYendapally Reddy Dhananjaya Reddy .of_match_table = bcm_iproc_pwmc_dt, 263daa5abc4SYendapally Reddy Dhananjaya Reddy }, 264daa5abc4SYendapally Reddy Dhananjaya Reddy .probe = iproc_pwmc_probe, 265daa5abc4SYendapally Reddy Dhananjaya Reddy .remove = iproc_pwmc_remove, 266daa5abc4SYendapally Reddy Dhananjaya Reddy }; 267daa5abc4SYendapally Reddy Dhananjaya Reddy module_platform_driver(iproc_pwmc_driver); 268daa5abc4SYendapally Reddy Dhananjaya Reddy 269daa5abc4SYendapally Reddy Dhananjaya Reddy MODULE_AUTHOR("Yendapally Reddy Dhananjaya Reddy <yendapally.reddy@broadcom.com>"); 270daa5abc4SYendapally Reddy Dhananjaya Reddy MODULE_DESCRIPTION("Broadcom iProc PWM driver"); 271daa5abc4SYendapally Reddy Dhananjaya Reddy MODULE_LICENSE("GPL v2"); 272