Add smbus alert interrupt support. Signed-off-by: Jan Glauber <jglauber@xxxxxxxxxx> --- drivers/i2c/busses/i2c-cavium.h | 6 ++++++ drivers/i2c/busses/i2c-thunderx-core.c | 35 ++++++++++++++++++++++++++++++++++ 2 files changed, 41 insertions(+) diff --git a/drivers/i2c/busses/i2c-cavium.h b/drivers/i2c/busses/i2c-cavium.h index 33c7e1f..9c128c1 100644 --- a/drivers/i2c/busses/i2c-cavium.h +++ b/drivers/i2c/busses/i2c-cavium.h @@ -3,6 +3,7 @@ #include <linux/delay.h> #include <linux/device.h> #include <linux/i2c.h> +#include <linux/i2c-smbus.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/pci.h> @@ -119,6 +120,11 @@ struct octeon_i2c { #if IS_ENABLED(CONFIG_I2C_THUNDERX) struct msix_entry i2c_msix; #endif + +#if IS_ENABLED(CONFIG_I2C_SMBUS) + struct i2c_smbus_alert_setup alert_data; + struct i2c_client *ara; +#endif }; static inline void octeon_i2c_writeq_flush(u64 val, void __iomem *addr) diff --git a/drivers/i2c/busses/i2c-thunderx-core.c b/drivers/i2c/busses/i2c-thunderx-core.c index 656b405..ac63113 100644 --- a/drivers/i2c/busses/i2c-thunderx-core.c +++ b/drivers/i2c/busses/i2c-thunderx-core.c @@ -9,9 +9,11 @@ #include <linux/clk.h> #include <linux/delay.h> #include <linux/i2c.h> +#include <linux/i2c-smbus.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/module.h> +#include <linux/of_irq.h> #include <linux/pci.h> #include "i2c-cavium.h" @@ -106,6 +108,35 @@ static void thunder_i2c_clock_disable(struct device *dev, struct clk *clk) devm_clk_put(dev, clk); } +static int thunder_i2c_smbus_setup(struct octeon_i2c *i2c, + struct device_node *node) +{ +#if IS_ENABLED(CONFIG_I2C_SMBUS) + u32 type; + + i2c->alert_data.irq = irq_of_parse_and_map(node, 0); + if (!i2c->alert_data.irq) + return -EINVAL; + + type = irqd_get_trigger_type(irq_get_irq_data(i2c->alert_data.irq)); + i2c->alert_data.alert_edge_triggered = + (type & IRQ_TYPE_LEVEL_MASK) ? 1 : 0; + + i2c->ara = i2c_setup_smbus_alert(&i2c->adap, &i2c->alert_data); + if (!i2c->ara) + return -ENODEV; +#endif + return 0; +} + +static void thunder_i2c_smbus_remove(struct octeon_i2c *i2c) +{ +#if IS_ENABLED(CONFIG_I2C_SMBUS) + if (i2c->ara) + i2c_unregister_device(i2c->ara); +#endif +} + static void thunder_i2c_set_name(struct pci_dev *pdev, struct octeon_i2c *i2c, char *name) { @@ -206,6 +237,9 @@ static int thunder_i2c_probe_pci(struct pci_dev *pdev, goto out_irq; } + ret = thunder_i2c_smbus_setup(i2c, node); + if (ret < 0) + dev_info(dev, "Failed to setup smbus alert\n"); dev_info(i2c->dev, "probed\n"); return 0; @@ -236,6 +270,7 @@ static void thunder_i2c_remove_pci(struct pci_dev *pdev) dev = i2c->dev; thunder_i2c_clock_disable(dev, i2c->clk); + thunder_i2c_smbus_remove(i2c); i2c_del_adapter(&i2c->adap); devm_free_irq(dev, i2c->i2c_msix.vector, i2c); pci_disable_msix(pdev); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html