@@ -41,6 +41,8 @@ static int ksz9477_i2c_probe(struct i2c_client *i2c,
if (i2c->dev.platform_data)
dev->pdata = i2c->dev.platform_data;
+ dev->irq = i2c->irq;
+
ret = ksz9477_switch_register(dev);
/* Main DSA driver may not be started yet. */
@@ -5,9 +5,12 @@
* Copyright (C) 2017-2019 Microchip Technology Inc.
*/
+#include <linux/bits.h>
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/interrupt.h>
#include <linux/iopoll.h>
+#include <linux/irq.h>
#include <linux/platform_data/microchip-ksz.h>
#include <linux/phy.h>
#include <linux/if_bridge.h>
@@ -1528,6 +1531,54 @@ static const struct ksz_chip_data ksz9477_switch_chips[] = {
},
};
+static irqreturn_t ksz9477_switch_irq_thread(int irq, void *dev_id)
+{
+ struct ksz_device *dev = dev_id;
+ u32 data;
+ int port;
+ int ret;
+
+ /* Read global port interrupt status register */
+ ret = ksz_read32(dev, REG_SW_PORT_INT_STATUS__4, &data);
+ if (ret)
+ return IRQ_NONE;
+
+ for (port = 0; port < dev->port_cnt; port++) {
+ u8 data8;
+
+ if (!(data & BIT(port)))
+ continue;
+
+ /* Read port interrupt status register */
+ ret = ksz_read8(dev, PORT_CTRL_ADDR(port, REG_PORT_INT_STATUS),
+ &data8);
+ if (ret)
+ return IRQ_NONE;
+
+ /* ToDo: Add specific handling of port interrupts */
+ }
+
+ return IRQ_NONE;
+}
+
+static int ksz9477_enable_port_interrupts(struct ksz_device *dev, bool enable)
+{
+ u32 data, mask = GENMASK(dev->port_cnt - 1, 0);
+ int ret;
+
+ ret = ksz_read32(dev, REG_SW_PORT_INT_MASK__4, &data);
+ if (ret)
+ return ret;
+
+ /* bits in REG_SW_PORT_INT_MASK__4 are low active */
+ if (enable)
+ data &= ~mask;
+ else
+ data |= mask;
+
+ return ksz_write32(dev, REG_SW_PORT_INT_MASK__4, data);
+}
+
static int ksz9477_switch_init(struct ksz_device *dev)
{
int i, ret;
@@ -1583,12 +1634,29 @@ static int ksz9477_switch_init(struct ksz_device *dev)
/* set the real number of ports */
dev->ds->num_ports = dev->port_cnt;
+ if (dev->irq > 0) {
+ ret = devm_request_threaded_irq(dev->dev, dev->irq, NULL,
+ ksz9477_switch_irq_thread,
+ IRQF_ONESHOT | IRQF_SHARED,
+ dev_name(dev->dev),
+ dev);
+ if (ret) {
+ dev_err(dev->dev, "failed to request IRQ.\n");
+ return ret;
+ }
+
+ ret = ksz9477_enable_port_interrupts(dev, true);
+ if (ret)
+ return ret;
+ }
return 0;
}
static void ksz9477_switch_exit(struct ksz_device *dev)
{
+ if (dev->irq > 0)
+ ksz9477_enable_port_interrupts(dev, false);
ksz9477_reset_switch(dev);
}
@@ -48,6 +48,8 @@ static int ksz9477_spi_probe(struct spi_device *spi)
if (spi->dev.platform_data)
dev->pdata = spi->dev.platform_data;
+ dev->irq = spi->irq;
+
ret = ksz9477_switch_register(dev);
/* Main DSA driver may not be started yet. */
@@ -55,6 +55,7 @@ struct ksz_device {
struct device *dev;
struct regmap *regmap[3];
+ int irq;
void *priv;
Interrupts are required for TX time stamping. Probably they could also be used for PHY connection status. This patch only adds the basic infrastructure for interrupts, no interrupts are finally enabled nor handled. Signed-off-by: Christian Eggers <ceggers@arri.de> --- drivers/net/dsa/microchip/ksz9477_i2c.c | 2 + drivers/net/dsa/microchip/ksz9477_main.c | 68 ++++++++++++++++++++++++ drivers/net/dsa/microchip/ksz9477_spi.c | 2 + drivers/net/dsa/microchip/ksz_common.h | 1 + 4 files changed, 73 insertions(+)