2  * Copyright (c) 2016 Open-RnD Sp. z o.o.
7  * SPDX-License-Identifier: Apache-2.0
16  * Microchip XEC: each GPIO pin has two 32-bit control register.
17  * The first 32-bit register contains all pin features except
24 static void config_drive_slew(struct gpio_regs * const regs, uint32_t idx, uint32_t conf)  in config_drive_slew()  argument
41 		val |= ((drvstr - 1u) << MCHP_GPIO_CTRL2_DRV_STR_POS);  in config_drive_slew()
48 	regs->CTRL2[idx] = (regs->CTRL2[idx] & ~msk) | (val & msk);  in config_drive_slew()
53  * None, weak pull-up, weak pull-down, or repeater mode (both pulls enabled).
55  * If the no-bias boolean is set then disable internal pulls.
61 	if (conf & BIT(MCHP_XEC_NO_PUD_POS)) {  in prog_pud()
67 	if (conf & (BIT(MCHP_XEC_PU_POS) | BIT(MCHP_XEC_PD_POS))) {  in prog_pud()
69 		if (conf & BIT(MCHP_XEC_PU_POS)) {  in prog_pud()
72 		if (conf & BIT(MCHP_XEC_PD_POS)) {  in prog_pud()
83  * in the control register. Hardware sets output state bit in both control and
85  * register bit is writable by the EC. We also clear the input pad disable
86  * bit because we need the input pin state and we don't know if the requested
87  * alternate function is input or bi-directional.
96 	uint32_t idx = 0u, pcr1 = 0u;  in xec_config_pin()  local
99 		return -EINVAL;  in xec_config_pin()
103 	idx = (port * 32U) + pin;  in xec_config_pin()
105 	config_drive_slew(regs, idx, conf);  in xec_config_pin()
108 	regs->CTRL[idx] &= ~(BIT(MCHP_GPIO_CTRL_AOD_POS) | BIT(MCHP_GPIO_CTRL_INPAD_DIS_POS));  in xec_config_pin()
109 	pcr1 = regs->CTRL[idx]; /* current configuration including pin input state */  in xec_config_pin()
110 	pcr1 = regs->CTRL[idx]; /* read multiple times to allow propagation from pad */  in xec_config_pin()
111 	pcr1 = regs->CTRL[idx]; /* Is this necessary? */  in xec_config_pin()
116 	if (conf & BIT(MCHP_XEC_OUT_DIS_POS)) {  in xec_config_pin()
119 	if (conf & BIT(MCHP_XEC_OUT_EN_POS)) {  in xec_config_pin()
123 	/* Touch output state? Bit can be set even if the direction is input only */  in xec_config_pin()
124 	if (conf & BIT(MCHP_XEC_OUT_LO_POS)) {  in xec_config_pin()
125 		pcr1 &= ~BIT(MCHP_GPIO_CTRL_OUTVAL_POS);  in xec_config_pin()
127 	if (conf & BIT(MCHP_XEC_OUT_HI_POS)) {  in xec_config_pin()
128 		pcr1 |= BIT(MCHP_GPIO_CTRL_OUTVAL_POS);  in xec_config_pin()
132 	if (conf & BIT(MCHP_XEC_PUSH_PULL_POS)) {  in xec_config_pin()
135 	if (conf & BIT(MCHP_XEC_OPEN_DRAIN_POS)) {  in xec_config_pin()
141 	if (conf & BIT(MCHP_XEC_PIN_LOW_POWER_POS)) {  in xec_config_pin()
151 	/* Always touch invert of alternate function. Need another bit to avoid touching */  in xec_config_pin()
152 	if (conf & BIT(MCHP_XEC_FUNC_INV_POS)) {  in xec_config_pin()
153 		pcr1 |= BIT(MCHP_GPIO_CTRL_POL_POS);  in xec_config_pin()
155 		pcr1 &= ~BIT(MCHP_GPIO_CTRL_POL_POS);  in xec_config_pin()
159 	regs->CTRL[idx] = pcr1;  in xec_config_pin()
160 	/* make output state in control read-only in control and read-write in parallel reg */  in xec_config_pin()
161 	regs->CTRL[idx] = pcr1 | BIT(MCHP_GPIO_CTRL_AOD_POS);  in xec_config_pin()
179 			return -EINVAL;  in pinctrl_configure_pins()