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-rw-r--r--drivers/i2c/algos/i2c-algo-pca.c2
-rw-r--r--drivers/i2c/busses/i2c-altera.c10
-rw-r--r--drivers/i2c/busses/i2c-amd-mp2-pci.c2
-rw-r--r--drivers/i2c/busses/i2c-aspeed.c5
-rw-r--r--drivers/i2c/busses/i2c-at91-master.c20
-rw-r--r--drivers/i2c/busses/i2c-bcm-iproc.c3
-rw-r--r--drivers/i2c/busses/i2c-tegra.c36
-rw-r--r--drivers/i2c/i2c-core-base.c24
-rw-r--r--drivers/i2c/i2c-core-of.c2
-rw-r--r--drivers/i2c/muxes/i2c-demux-pinctrl.c1
10 files changed, 66 insertions, 39 deletions
diff --git a/drivers/i2c/algos/i2c-algo-pca.c b/drivers/i2c/algos/i2c-algo-pca.c
index dff4e178c732..7f10312d1b88 100644
--- a/drivers/i2c/algos/i2c-algo-pca.c
+++ b/drivers/i2c/algos/i2c-algo-pca.c
@@ -542,7 +542,7 @@ int i2c_pca_add_numbered_bus(struct i2c_adapter *adap)
EXPORT_SYMBOL(i2c_pca_add_numbered_bus);
MODULE_AUTHOR("Ian Campbell <icampbell@arcom.com>, "
- "Wolfram Sang <w.sang@pengutronix.de>");
+ "Wolfram Sang <kernel@pengutronix.de>");
MODULE_DESCRIPTION("I2C-Bus PCA9564/PCA9665 algorithm");
MODULE_LICENSE("GPL");
diff --git a/drivers/i2c/busses/i2c-altera.c b/drivers/i2c/busses/i2c-altera.c
index f5c00f903df3..16ddc26c00e6 100644
--- a/drivers/i2c/busses/i2c-altera.c
+++ b/drivers/i2c/busses/i2c-altera.c
@@ -70,6 +70,7 @@
* @isr_mask: cached copy of local ISR enables.
* @isr_status: cached copy of local ISR status.
* @lock: spinlock for IRQ synchronization.
+ * @isr_mutex: mutex for IRQ thread.
*/
struct altr_i2c_dev {
void __iomem *base;
@@ -86,6 +87,7 @@ struct altr_i2c_dev {
u32 isr_mask;
u32 isr_status;
spinlock_t lock; /* IRQ synchronization */
+ struct mutex isr_mutex;
};
static void
@@ -245,10 +247,11 @@ static irqreturn_t altr_i2c_isr(int irq, void *_dev)
struct altr_i2c_dev *idev = _dev;
u32 status = idev->isr_status;
+ mutex_lock(&idev->isr_mutex);
if (!idev->msg) {
dev_warn(idev->dev, "unexpected interrupt\n");
altr_i2c_int_clear(idev, ALTR_I2C_ALL_IRQ);
- return IRQ_HANDLED;
+ goto out;
}
read = (idev->msg->flags & I2C_M_RD) != 0;
@@ -301,6 +304,8 @@ static irqreturn_t altr_i2c_isr(int irq, void *_dev)
complete(&idev->msg_complete);
dev_dbg(idev->dev, "Message Complete\n");
}
+out:
+ mutex_unlock(&idev->isr_mutex);
return IRQ_HANDLED;
}
@@ -312,6 +317,7 @@ static int altr_i2c_xfer_msg(struct altr_i2c_dev *idev, struct i2c_msg *msg)
u32 value;
u8 addr = i2c_8bit_addr_from_msg(msg);
+ mutex_lock(&idev->isr_mutex);
idev->msg = msg;
idev->msg_len = msg->len;
idev->buf = msg->buf;
@@ -336,6 +342,7 @@ static int altr_i2c_xfer_msg(struct altr_i2c_dev *idev, struct i2c_msg *msg)
altr_i2c_int_enable(idev, imask, true);
altr_i2c_fill_tx_fifo(idev);
}
+ mutex_unlock(&idev->isr_mutex);
time_left = wait_for_completion_timeout(&idev->msg_complete,
ALTR_I2C_XFER_TIMEOUT);
@@ -409,6 +416,7 @@ static int altr_i2c_probe(struct platform_device *pdev)
idev->dev = &pdev->dev;
init_completion(&idev->msg_complete);
spin_lock_init(&idev->lock);
+ mutex_init(&idev->isr_mutex);
ret = device_property_read_u32(idev->dev, "fifo-size",
&idev->fifo_size);
diff --git a/drivers/i2c/busses/i2c-amd-mp2-pci.c b/drivers/i2c/busses/i2c-amd-mp2-pci.c
index 5e4800d72e00..cd3fd5ee5f65 100644
--- a/drivers/i2c/busses/i2c-amd-mp2-pci.c
+++ b/drivers/i2c/busses/i2c-amd-mp2-pci.c
@@ -349,12 +349,12 @@ static int amd_mp2_pci_probe(struct pci_dev *pci_dev,
if (!privdata)
return -ENOMEM;
+ privdata->pci_dev = pci_dev;
rc = amd_mp2_pci_init(privdata, pci_dev);
if (rc)
return rc;
mutex_init(&privdata->c2p_lock);
- privdata->pci_dev = pci_dev;
pm_runtime_set_autosuspend_delay(&pci_dev->dev, 1000);
pm_runtime_use_autosuspend(&pci_dev->dev);
diff --git a/drivers/i2c/busses/i2c-aspeed.c b/drivers/i2c/busses/i2c-aspeed.c
index 07c1993274c5..f51702d86a90 100644
--- a/drivers/i2c/busses/i2c-aspeed.c
+++ b/drivers/i2c/busses/i2c-aspeed.c
@@ -603,6 +603,7 @@ static irqreturn_t aspeed_i2c_bus_irq(int irq, void *dev_id)
/* Ack all interrupts except for Rx done */
writel(irq_received & ~ASPEED_I2CD_INTR_RX_DONE,
bus->base + ASPEED_I2C_INTR_STS_REG);
+ readl(bus->base + ASPEED_I2C_INTR_STS_REG);
irq_remaining = irq_received;
#if IS_ENABLED(CONFIG_I2C_SLAVE)
@@ -645,9 +646,11 @@ static irqreturn_t aspeed_i2c_bus_irq(int irq, void *dev_id)
irq_received, irq_handled);
/* Ack Rx done */
- if (irq_received & ASPEED_I2CD_INTR_RX_DONE)
+ if (irq_received & ASPEED_I2CD_INTR_RX_DONE) {
writel(ASPEED_I2CD_INTR_RX_DONE,
bus->base + ASPEED_I2C_INTR_STS_REG);
+ readl(bus->base + ASPEED_I2C_INTR_STS_REG);
+ }
spin_unlock(&bus->lock);
return irq_remaining ? IRQ_NONE : IRQ_HANDLED;
}
diff --git a/drivers/i2c/busses/i2c-at91-master.c b/drivers/i2c/busses/i2c-at91-master.c
index 0aba51a7df32..37b96ac9dfae 100644
--- a/drivers/i2c/busses/i2c-at91-master.c
+++ b/drivers/i2c/busses/i2c-at91-master.c
@@ -845,6 +845,18 @@ static int at91_init_twi_recovery_info(struct platform_device *pdev,
PINCTRL_STATE_DEFAULT);
dev->pinctrl_pins_gpio = pinctrl_lookup_state(dev->pinctrl,
"gpio");
+ if (IS_ERR(dev->pinctrl_pins_default) ||
+ IS_ERR(dev->pinctrl_pins_gpio)) {
+ dev_info(&pdev->dev, "pinctrl states incomplete for recovery\n");
+ return -EINVAL;
+ }
+
+ /*
+ * pins will be taken as GPIO, so we might as well inform pinctrl about
+ * this and move the state to GPIO
+ */
+ pinctrl_select_state(dev->pinctrl, dev->pinctrl_pins_gpio);
+
rinfo->sda_gpiod = devm_gpiod_get(&pdev->dev, "sda", GPIOD_IN);
if (PTR_ERR(rinfo->sda_gpiod) == -EPROBE_DEFER)
return -EPROBE_DEFER;
@@ -855,9 +867,7 @@ static int at91_init_twi_recovery_info(struct platform_device *pdev,
return -EPROBE_DEFER;
if (IS_ERR(rinfo->sda_gpiod) ||
- IS_ERR(rinfo->scl_gpiod) ||
- IS_ERR(dev->pinctrl_pins_default) ||
- IS_ERR(dev->pinctrl_pins_gpio)) {
+ IS_ERR(rinfo->scl_gpiod)) {
dev_info(&pdev->dev, "recovery information incomplete\n");
if (!IS_ERR(rinfo->sda_gpiod)) {
gpiod_put(rinfo->sda_gpiod);
@@ -867,9 +877,13 @@ static int at91_init_twi_recovery_info(struct platform_device *pdev,
gpiod_put(rinfo->scl_gpiod);
rinfo->scl_gpiod = NULL;
}
+ pinctrl_select_state(dev->pinctrl, dev->pinctrl_pins_default);
return -EINVAL;
}
+ /* change the state of the pins back to their default state */
+ pinctrl_select_state(dev->pinctrl, dev->pinctrl_pins_default);
+
dev_info(&pdev->dev, "using scl, sda for recovery\n");
rinfo->prepare_recovery = at91_prepare_twi_recovery;
diff --git a/drivers/i2c/busses/i2c-bcm-iproc.c b/drivers/i2c/busses/i2c-bcm-iproc.c
index 44be0926b566..d091a12596ad 100644
--- a/drivers/i2c/busses/i2c-bcm-iproc.c
+++ b/drivers/i2c/busses/i2c-bcm-iproc.c
@@ -360,6 +360,9 @@ static bool bcm_iproc_i2c_slave_isr(struct bcm_iproc_i2c_dev *iproc_i2c,
value = (u8)((val >> S_RX_DATA_SHIFT) & S_RX_DATA_MASK);
i2c_slave_event(iproc_i2c->slave,
I2C_SLAVE_WRITE_RECEIVED, &value);
+ if (rx_status == I2C_SLAVE_RX_END)
+ i2c_slave_event(iproc_i2c->slave,
+ I2C_SLAVE_STOP, &value);
}
} else if (status & BIT(IS_S_TX_UNDERRUN_SHIFT)) {
/* Master read other than start */
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 8280ac7cc1b7..4c4d17ddc96b 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -996,13 +996,14 @@ tegra_i2c_poll_completion_timeout(struct tegra_i2c_dev *i2c_dev,
do {
u32 status = i2c_readl(i2c_dev, I2C_INT_STATUS);
- if (status)
+ if (status) {
tegra_i2c_isr(i2c_dev->irq, i2c_dev);
- if (completion_done(complete)) {
- s64 delta = ktime_ms_delta(ktimeout, ktime);
+ if (completion_done(complete)) {
+ s64 delta = ktime_ms_delta(ktimeout, ktime);
- return msecs_to_jiffies(delta) ?: 1;
+ return msecs_to_jiffies(delta) ?: 1;
+ }
}
ktime = ktime_get();
@@ -1029,18 +1030,14 @@ tegra_i2c_wait_completion_timeout(struct tegra_i2c_dev *i2c_dev,
disable_irq(i2c_dev->irq);
/*
- * Under some rare circumstances (like running KASAN +
- * NFS root) CPU, which handles interrupt, may stuck in
- * uninterruptible state for a significant time. In this
- * case we will get timeout if I2C transfer is running on
- * a sibling CPU, despite of IRQ being raised.
- *
- * In order to handle this rare condition, the IRQ status
- * needs to be checked after timeout.
+ * There is a chance that completion may happen after IRQ
+ * synchronization, which is done by disable_irq().
*/
- if (ret == 0)
- ret = tegra_i2c_poll_completion_timeout(i2c_dev,
- complete, 0);
+ if (ret == 0 && completion_done(complete)) {
+ dev_warn(i2c_dev->dev,
+ "completion done after timeout\n");
+ ret = 1;
+ }
}
return ret;
@@ -1219,15 +1216,6 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev,
time_left = tegra_i2c_wait_completion_timeout(
i2c_dev, &i2c_dev->dma_complete, xfer_time);
- /*
- * Synchronize DMA first, since dmaengine_terminate_sync()
- * performs synchronization after the transfer's termination
- * and we want to get a completion if transfer succeeded.
- */
- dmaengine_synchronize(i2c_dev->msg_read ?
- i2c_dev->rx_dma_chan :
- i2c_dev->tx_dma_chan);
-
dmaengine_terminate_sync(i2c_dev->msg_read ?
i2c_dev->rx_dma_chan :
i2c_dev->tx_dma_chan);
diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
index a66912782064..1f1442dfcad7 100644
--- a/drivers/i2c/i2c-core-base.c
+++ b/drivers/i2c/i2c-core-base.c
@@ -7,7 +7,7 @@
* Mux support by Rodolfo Giometti <giometti@enneenne.com> and
* Michael Lawnick <michael.lawnick.ext@nsn.com>
*
- * Copyright (C) 2013-2017 Wolfram Sang <wsa@the-dreams.de>
+ * Copyright (C) 2013-2017 Wolfram Sang <wsa@kernel.org>
*/
#define pr_fmt(fmt) "i2c-core: " fmt
@@ -338,8 +338,10 @@ static int i2c_device_probe(struct device *dev)
} else if (ACPI_COMPANION(dev)) {
irq = i2c_acpi_get_irq(client);
}
- if (irq == -EPROBE_DEFER)
- return irq;
+ if (irq == -EPROBE_DEFER) {
+ status = irq;
+ goto put_sync_adapter;
+ }
if (irq < 0)
irq = 0;
@@ -353,15 +355,19 @@ static int i2c_device_probe(struct device *dev)
*/
if (!driver->id_table &&
!i2c_acpi_match_device(dev->driver->acpi_match_table, client) &&
- !i2c_of_match_device(dev->driver->of_match_table, client))
- return -ENODEV;
+ !i2c_of_match_device(dev->driver->of_match_table, client)) {
+ status = -ENODEV;
+ goto put_sync_adapter;
+ }
if (client->flags & I2C_CLIENT_WAKE) {
int wakeirq;
wakeirq = of_irq_get_byname(dev->of_node, "wakeup");
- if (wakeirq == -EPROBE_DEFER)
- return wakeirq;
+ if (wakeirq == -EPROBE_DEFER) {
+ status = wakeirq;
+ goto put_sync_adapter;
+ }
device_init_wakeup(&client->dev, true);
@@ -408,6 +414,10 @@ err_detach_pm_domain:
err_clear_wakeup_irq:
dev_pm_clear_wake_irq(&client->dev);
device_init_wakeup(&client->dev, false);
+put_sync_adapter:
+ if (client->flags & I2C_CLIENT_HOST_NOTIFY)
+ pm_runtime_put_sync(&client->adapter->dev);
+
return status;
}
diff --git a/drivers/i2c/i2c-core-of.c b/drivers/i2c/i2c-core-of.c
index 6787c1f71483..3ed74aa4b44b 100644
--- a/drivers/i2c/i2c-core-of.c
+++ b/drivers/i2c/i2c-core-of.c
@@ -5,7 +5,7 @@
* Copyright (C) 2008 Jochen Friedrich <jochen@scram.de>
* based on a previous patch from Jon Smirl <jonsmirl@gmail.com>
*
- * Copyright (C) 2013, 2018 Wolfram Sang <wsa@the-dreams.de>
+ * Copyright (C) 2013, 2018 Wolfram Sang <wsa@kernel.org>
*/
#include <dt-bindings/i2c/i2c.h>
diff --git a/drivers/i2c/muxes/i2c-demux-pinctrl.c b/drivers/i2c/muxes/i2c-demux-pinctrl.c
index 0e16490eb3a1..5365199a31f4 100644
--- a/drivers/i2c/muxes/i2c-demux-pinctrl.c
+++ b/drivers/i2c/muxes/i2c-demux-pinctrl.c
@@ -272,6 +272,7 @@ static int i2c_demux_pinctrl_probe(struct platform_device *pdev)
err_rollback_available:
device_remove_file(&pdev->dev, &dev_attr_available_masters);
err_rollback:
+ i2c_demux_deactivate_master(priv);
for (j = 0; j < i; j++) {
of_node_put(priv->chan[j].parent_np);
of_changeset_destroy(&priv->chan[j].chgset);
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-27 10:48:04 +0300