qcom-pdc.c (58f7553fa424fd0fd74e8b796d50c66014cebebe) qcom-pdc.c (2f5fbc4305d07725bfebaedb09e57271315691ef)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2017-2019, The Linux Foundation. All rights reserved.
4 */
5
6#include <linux/err.h>
7#include <linux/init.h>
8#include <linux/interrupt.h>

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154 * takes care of converting falling edge to rising edge signal
155 * If @type is level, then forward that as level high as PDC
156 * takes care of converting falling edge to rising edge signal
157 */
158static int qcom_pdc_gic_set_type(struct irq_data *d, unsigned int type)
159{
160 int pin_out = d->hwirq;
161 enum pdc_irq_config_bits pdc_type;
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2017-2019, The Linux Foundation. All rights reserved.
4 */
5
6#include <linux/err.h>
7#include <linux/init.h>
8#include <linux/interrupt.h>

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154 * takes care of converting falling edge to rising edge signal
155 * If @type is level, then forward that as level high as PDC
156 * takes care of converting falling edge to rising edge signal
157 */
158static int qcom_pdc_gic_set_type(struct irq_data *d, unsigned int type)
159{
160 int pin_out = d->hwirq;
161 enum pdc_irq_config_bits pdc_type;
162 enum pdc_irq_config_bits old_pdc_type;
163 int ret;
162
163 if (pin_out == GPIO_NO_WAKE_IRQ)
164 return 0;
165
166 switch (type) {
167 case IRQ_TYPE_EDGE_RISING:
168 pdc_type = PDC_EDGE_RISING;
169 break;

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182 pdc_type = PDC_LEVEL_LOW;
183 type = IRQ_TYPE_LEVEL_HIGH;
184 break;
185 default:
186 WARN_ON(1);
187 return -EINVAL;
188 }
189
164
165 if (pin_out == GPIO_NO_WAKE_IRQ)
166 return 0;
167
168 switch (type) {
169 case IRQ_TYPE_EDGE_RISING:
170 pdc_type = PDC_EDGE_RISING;
171 break;

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184 pdc_type = PDC_LEVEL_LOW;
185 type = IRQ_TYPE_LEVEL_HIGH;
186 break;
187 default:
188 WARN_ON(1);
189 return -EINVAL;
190 }
191
192 old_pdc_type = pdc_reg_read(IRQ_i_CFG, pin_out);
190 pdc_reg_write(IRQ_i_CFG, pin_out, pdc_type);
191
193 pdc_reg_write(IRQ_i_CFG, pin_out, pdc_type);
194
192 return irq_chip_set_type_parent(d, type);
195 ret = irq_chip_set_type_parent(d, type);
196 if (ret)
197 return ret;
198
199 /*
200 * When we change types the PDC can give a phantom interrupt.
201 * Clear it. Specifically the phantom shows up when reconfiguring
202 * polarity of interrupt without changing the state of the signal
203 * but let's be consistent and clear it always.
204 *
205 * Doing this works because we have IRQCHIP_SET_TYPE_MASKED so the
206 * interrupt will be cleared before the rest of the system sees it.
207 */
208 if (old_pdc_type != pdc_type)
209 irq_chip_set_parent_state(d, IRQCHIP_STATE_PENDING, false);
210
211 return 0;
193}
194
195static struct irq_chip qcom_pdc_gic_chip = {
196 .name = "PDC",
197 .irq_eoi = irq_chip_eoi_parent,
198 .irq_mask = qcom_pdc_gic_mask,
199 .irq_unmask = qcom_pdc_gic_unmask,
200 .irq_disable = qcom_pdc_gic_disable,

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213
214static struct irq_chip qcom_pdc_gic_chip = {
215 .name = "PDC",
216 .irq_eoi = irq_chip_eoi_parent,
217 .irq_mask = qcom_pdc_gic_mask,
218 .irq_unmask = qcom_pdc_gic_unmask,
219 .irq_disable = qcom_pdc_gic_disable,

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