Lines Matching +full:multi +full:- +full:bit
1 // SPDX-License-Identifier: GPL-2.0-only
29 #define IPROC_PWM_PRESCALE_SHIFT(ch) ((3 - (ch)) * \
51 value = readl(ip->base + IPROC_PWM_CTRL_OFFSET); in iproc_pwmc_enable()
53 writel(value, ip->base + IPROC_PWM_CTRL_OFFSET); in iproc_pwmc_enable()
55 /* must be a 400 ns delay between clearing and setting enable bit */ in iproc_pwmc_enable()
63 value = readl(ip->base + IPROC_PWM_CTRL_OFFSET); in iproc_pwmc_disable()
65 writel(value, ip->base + IPROC_PWM_CTRL_OFFSET); in iproc_pwmc_disable()
67 /* must be a 400 ns delay between clearing and setting enable bit */ in iproc_pwmc_disable()
75 u64 tmp, multi, rate; in iproc_pwmc_get_state() local
78 value = readl(ip->base + IPROC_PWM_CTRL_OFFSET); in iproc_pwmc_get_state()
80 if (value & BIT(IPROC_PWM_CTRL_EN_SHIFT(pwm->hwpwm))) in iproc_pwmc_get_state()
81 state->enabled = true; in iproc_pwmc_get_state()
83 state->enabled = false; in iproc_pwmc_get_state()
85 if (value & BIT(IPROC_PWM_CTRL_POLARITY_SHIFT(pwm->hwpwm))) in iproc_pwmc_get_state()
86 state->polarity = PWM_POLARITY_NORMAL; in iproc_pwmc_get_state()
88 state->polarity = PWM_POLARITY_INVERSED; in iproc_pwmc_get_state()
90 rate = clk_get_rate(ip->clk); in iproc_pwmc_get_state()
92 state->period = 0; in iproc_pwmc_get_state()
93 state->duty_cycle = 0; in iproc_pwmc_get_state()
97 value = readl(ip->base + IPROC_PWM_PRESCALE_OFFSET); in iproc_pwmc_get_state()
98 prescale = value >> IPROC_PWM_PRESCALE_SHIFT(pwm->hwpwm); in iproc_pwmc_get_state()
101 multi = NSEC_PER_SEC * (prescale + 1); in iproc_pwmc_get_state()
103 value = readl(ip->base + IPROC_PWM_PERIOD_OFFSET(pwm->hwpwm)); in iproc_pwmc_get_state()
104 tmp = (value & IPROC_PWM_PERIOD_MAX) * multi; in iproc_pwmc_get_state()
105 state->period = div64_u64(tmp, rate); in iproc_pwmc_get_state()
107 value = readl(ip->base + IPROC_PWM_DUTY_CYCLE_OFFSET(pwm->hwpwm)); in iproc_pwmc_get_state()
108 tmp = (value & IPROC_PWM_PERIOD_MAX) * multi; in iproc_pwmc_get_state()
109 state->duty_cycle = div64_u64(tmp, rate); in iproc_pwmc_get_state()
122 rate = clk_get_rate(ip->clk); in iproc_pwmc_apply()
138 value = rate * state->period; in iproc_pwmc_apply()
140 value = rate * state->duty_cycle; in iproc_pwmc_apply()
144 return -EINVAL; in iproc_pwmc_apply()
152 return -EINVAL; in iproc_pwmc_apply()
155 iproc_pwmc_disable(ip, pwm->hwpwm); in iproc_pwmc_apply()
158 value = readl(ip->base + IPROC_PWM_PRESCALE_OFFSET); in iproc_pwmc_apply()
159 value &= ~IPROC_PWM_PRESCALE_MASK(pwm->hwpwm); in iproc_pwmc_apply()
160 value |= prescale << IPROC_PWM_PRESCALE_SHIFT(pwm->hwpwm); in iproc_pwmc_apply()
161 writel(value, ip->base + IPROC_PWM_PRESCALE_OFFSET); in iproc_pwmc_apply()
164 writel(period, ip->base + IPROC_PWM_PERIOD_OFFSET(pwm->hwpwm)); in iproc_pwmc_apply()
165 writel(duty, ip->base + IPROC_PWM_DUTY_CYCLE_OFFSET(pwm->hwpwm)); in iproc_pwmc_apply()
168 value = readl(ip->base + IPROC_PWM_CTRL_OFFSET); in iproc_pwmc_apply()
170 if (state->polarity == PWM_POLARITY_NORMAL) in iproc_pwmc_apply()
171 value |= 1 << IPROC_PWM_CTRL_POLARITY_SHIFT(pwm->hwpwm); in iproc_pwmc_apply()
173 value &= ~(1 << IPROC_PWM_CTRL_POLARITY_SHIFT(pwm->hwpwm)); in iproc_pwmc_apply()
175 writel(value, ip->base + IPROC_PWM_CTRL_OFFSET); in iproc_pwmc_apply()
177 if (state->enabled) in iproc_pwmc_apply()
178 iproc_pwmc_enable(ip, pwm->hwpwm); in iproc_pwmc_apply()
195 ip = devm_kzalloc(&pdev->dev, sizeof(*ip), GFP_KERNEL); in iproc_pwmc_probe()
197 return -ENOMEM; in iproc_pwmc_probe()
201 ip->chip.dev = &pdev->dev; in iproc_pwmc_probe()
202 ip->chip.ops = &iproc_pwm_ops; in iproc_pwmc_probe()
203 ip->chip.npwm = 4; in iproc_pwmc_probe()
205 ip->base = devm_platform_ioremap_resource(pdev, 0); in iproc_pwmc_probe()
206 if (IS_ERR(ip->base)) in iproc_pwmc_probe()
207 return PTR_ERR(ip->base); in iproc_pwmc_probe()
209 ip->clk = devm_clk_get_enabled(&pdev->dev, NULL); in iproc_pwmc_probe()
210 if (IS_ERR(ip->clk)) in iproc_pwmc_probe()
211 return dev_err_probe(&pdev->dev, PTR_ERR(ip->clk), in iproc_pwmc_probe()
215 value = readl(ip->base + IPROC_PWM_CTRL_OFFSET); in iproc_pwmc_probe()
217 for (i = 0; i < ip->chip.npwm; i++) { in iproc_pwmc_probe()
222 writel(value, ip->base + IPROC_PWM_CTRL_OFFSET); in iproc_pwmc_probe()
224 ret = devm_pwmchip_add(&pdev->dev, &ip->chip); in iproc_pwmc_probe()
226 return dev_err_probe(&pdev->dev, ret, in iproc_pwmc_probe()
233 { .compatible = "brcm,iproc-pwm" },
240 .name = "bcm-iproc-pwm",