mfd: Add tps65910-irq devicetree init and irqdomain support
This change changes the tps65910-irq code to use irqdomain, and support initialization from devicetree. This assumes that the irq_base in the platform data is -1 if devicetree is used. Signed-off-by: Rhyland Klein <rklein@nvidia.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Rhyland Klein
Samuel Ortiz
parent
b09530ef84
commit
21f7541d88
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@ -190,6 +190,7 @@ config MFD_TPS65910
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depends on I2C=y && GPIOLIB
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select MFD_CORE
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select REGMAP_I2C
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select IRQ_DOMAIN
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help
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if you say yes here you get support for the TPS65910 series of
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Power Management chips.
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@ -20,15 +20,10 @@
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/irqdomain.h>
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#include <linux/gpio.h>
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#include <linux/mfd/tps65910.h>
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static inline int irq_to_tps65910_irq(struct tps65910 *tps65910,
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int irq)
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{
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return (irq - tps65910->irq_base);
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}
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/*
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* This is a threaded IRQ handler so can access I2C/SPI. Since all
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* interrupts are clear on read the IRQ line will be reasserted and
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@ -76,7 +71,7 @@ static irqreturn_t tps65910_irq(int irq, void *irq_data)
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if (!(irq_sts & (1 << i)))
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continue;
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handle_nested_irq(tps65910->irq_base + i);
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handle_nested_irq(irq_find_mapping(tps65910->domain, i));
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}
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/* Write the STS register back to clear IRQs we handled */
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@ -135,14 +130,14 @@ static void tps65910_irq_enable(struct irq_data *data)
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{
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struct tps65910 *tps65910 = irq_data_get_irq_chip_data(data);
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tps65910->irq_mask &= ~( 1 << irq_to_tps65910_irq(tps65910, data->irq));
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tps65910->irq_mask &= ~(1 << data->hwirq);
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}
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static void tps65910_irq_disable(struct irq_data *data)
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{
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struct tps65910 *tps65910 = irq_data_get_irq_chip_data(data);
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tps65910->irq_mask |= ( 1 << irq_to_tps65910_irq(tps65910, data->irq));
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tps65910->irq_mask |= (1 << data->hwirq);
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}
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#ifdef CONFIG_PM_SLEEP
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@ -164,10 +159,35 @@ static struct irq_chip tps65910_irq_chip = {
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.irq_set_wake = tps65910_irq_set_wake,
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};
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static int tps65910_irq_map(struct irq_domain *h, unsigned int virq,
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irq_hw_number_t hw)
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{
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struct tps65910 *tps65910 = h->host_data;
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irq_set_chip_data(virq, tps65910);
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irq_set_chip_and_handler(virq, &tps65910_irq_chip, handle_edge_irq);
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irq_set_nested_thread(virq, 1);
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/* ARM needs us to explicitly flag the IRQ as valid
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* and will set them noprobe when we do so. */
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#ifdef CONFIG_ARM
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set_irq_flags(virq, IRQF_VALID);
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#else
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irq_set_noprobe(virq);
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#endif
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return 0;
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}
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static struct irq_domain_ops tps65910_domain_ops = {
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.map = tps65910_irq_map,
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.xlate = irq_domain_xlate_twocell,
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};
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int tps65910_irq_init(struct tps65910 *tps65910, int irq,
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struct tps65910_platform_data *pdata)
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{
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int ret, cur_irq;
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int ret;
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int flags = IRQF_ONESHOT;
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if (!irq) {
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@ -175,17 +195,11 @@ int tps65910_irq_init(struct tps65910 *tps65910, int irq,
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return -EINVAL;
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}
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if (!pdata || !pdata->irq_base) {
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dev_warn(tps65910->dev, "No interrupt support, no IRQ base\n");
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if (!pdata) {
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dev_warn(tps65910->dev, "No interrupt support, no pdata\n");
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return -EINVAL;
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}
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tps65910->irq_mask = 0xFFFFFF;
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mutex_init(&tps65910->irq_lock);
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tps65910->chip_irq = irq;
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tps65910->irq_base = pdata->irq_base;
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switch (tps65910_chip_id(tps65910)) {
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case TPS65910:
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tps65910->irq_num = TPS65910_NUM_IRQ;
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@ -195,22 +209,36 @@ int tps65910_irq_init(struct tps65910 *tps65910, int irq,
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break;
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}
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/* Register with genirq */
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for (cur_irq = tps65910->irq_base;
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cur_irq < tps65910->irq_num + tps65910->irq_base;
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cur_irq++) {
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irq_set_chip_data(cur_irq, tps65910);
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irq_set_chip_and_handler(cur_irq, &tps65910_irq_chip,
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handle_edge_irq);
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irq_set_nested_thread(cur_irq, 1);
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if (pdata->irq_base > 0) {
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pdata->irq_base = irq_alloc_descs(pdata->irq_base, 0,
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tps65910->irq_num, -1);
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if (pdata->irq_base < 0) {
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dev_warn(tps65910->dev, "Failed to alloc IRQs: %d\n",
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pdata->irq_base);
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return pdata->irq_base;
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}
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}
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/* ARM needs us to explicitly flag the IRQ as valid
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* and will set them noprobe when we do so. */
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#ifdef CONFIG_ARM
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set_irq_flags(cur_irq, IRQF_VALID);
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#else
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irq_set_noprobe(cur_irq);
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#endif
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tps65910->irq_mask = 0xFFFFFF;
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mutex_init(&tps65910->irq_lock);
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tps65910->chip_irq = irq;
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tps65910->irq_base = pdata->irq_base;
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if (pdata->irq_base > 0)
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tps65910->domain = irq_domain_add_legacy(tps65910->dev->of_node,
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tps65910->irq_num,
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pdata->irq_base,
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0,
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&tps65910_domain_ops, tps65910);
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else
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tps65910->domain = irq_domain_add_linear(tps65910->dev->of_node,
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tps65910->irq_num,
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&tps65910_domain_ops, tps65910);
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if (!tps65910->domain) {
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dev_err(tps65910->dev, "Failed to create IRQ domain\n");
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return -ENOMEM;
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}
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ret = request_threaded_irq(irq, NULL, tps65910_irq, flags,
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@ -836,6 +836,7 @@ struct tps65910 {
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int irq_base;
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int irq_num;
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u32 irq_mask;
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struct irq_domain *domain;
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};
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struct tps65910_platform_data {
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