1 // SPDX-License-Identifier: GPL-2.0+
10 #include <pwm.h>
12 #include <asm/arch/pwm.h>
17 	const struct s5p_timer *pwm =  in pwm_enable()  local
21 	tcon = readl(&pwm->tcon);  in pwm_enable()
24 	writel(tcon, &pwm->tcon);  in pwm_enable()
26 	return 0;  in pwm_enable()
31 	const struct s5p_timer *pwm =  in pwm_disable()  local
35 	tcon = readl(&pwm->tcon);  in pwm_disable()
38 	writel(tcon, &pwm->tcon);  in pwm_disable()
60 	const struct s5p_timer *pwm =  in pwm_config()  local
75 	if (period_ns > NS_IN_SEC || duty_ns > NS_IN_SEC || period_ns == 0)  in pwm_config()
76 		return -ERANGE;  in pwm_config()
79 		return -EINVAL;  in pwm_config()
83 	/* Check to see if we are changing the clock rate of the PWM */  in pwm_config()
91 	tcmp = tcnt - tcmp;  in pwm_config()
93 	/* Update the PWM register block. */  in pwm_config()
96 		writel(tcnt, &pwm->tcntb0 + offset);  in pwm_config()
97 		writel(tcmp, &pwm->tcmpb0 + offset);  in pwm_config()
100 	tcon = readl(&pwm->tcon);  in pwm_config()
106 	writel(tcon, &pwm->tcon);  in pwm_config()
109 	writel(tcon, &pwm->tcon);  in pwm_config()
111 	return 0;  in pwm_config()
117 	const struct s5p_timer *pwm =  in pwm_init()  local
127 	val = readl(&pwm->tcfg0);  in pwm_init()
130 		val &= ~0xff;  in pwm_init()
131 		val |= (prescaler & 0xff);  in pwm_init()
134 		val &= ~(0xff << 8);  in pwm_init()
135 		val |= (prescaler & 0xff) << 8;  in pwm_init()
137 	writel(val, &pwm->tcfg0);  in pwm_init()
138 	val = readl(&pwm->tcfg1);  in pwm_init()
139 	val &= ~(0xf << MUX_DIV_SHIFT(pwm_id));  in pwm_init()
140 	val |= (div & 0xf) << MUX_DIV_SHIFT(pwm_id);  in pwm_init()
141 	writel(val, &pwm->tcfg1);  in pwm_init()
146 		 * down from the maximum value to 0, then reset.  in pwm_init()
148 		ticks_per_period = -1UL;  in pwm_init()
160 	writel(ticks_per_period, &pwm->tcntb0 + offset);  in pwm_init()
162 	val = readl(&pwm->tcon) & ~(0xf << TCON_OFFSET(pwm_id));  in pwm_init()
165 	writel(val, &pwm->tcon);  in pwm_init()
169 	return 0;  in pwm_init()