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Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/Kconfig1
-rw-r--r--drivers/i2c/busses/i2c-designware-master.c1
-rw-r--r--drivers/i2c/busses/i2c-designware-pcidrv.c33
-rw-r--r--drivers/i2c/busses/i2c-designware-platdrv.c48
-rw-r--r--drivers/i2c/busses/i2c-designware-slave.c2
-rw-r--r--drivers/i2c/busses/i2c-imx-lpi2c.c4
-rw-r--r--drivers/i2c/busses/i2c-npcm7xx.c12
-rw-r--r--drivers/i2c/busses/i2c-omap.c30
-rw-r--r--drivers/i2c/busses/i2c-pxa.c5
-rw-r--r--drivers/i2c/busses/i2c-qup.c40
-rw-r--r--drivers/i2c/busses/i2c-robotfuzz-osif.c6
-rw-r--r--drivers/i2c/busses/i2c-stm32.c8
-rw-r--r--drivers/i2c/busses/i2c-stm32f7.c24
-rw-r--r--drivers/i2c/busses/i2c-tegra.c29
-rw-r--r--drivers/i2c/busses/i2c-tiny-usb.c6
-rw-r--r--drivers/i2c/busses/i2c-virtio.c15
-rw-r--r--drivers/i2c/i2c-core-acpi.c1
-rw-r--r--drivers/i2c/muxes/i2c-mux-mule.c3
18 files changed, 165 insertions, 103 deletions
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index 2254abda5c46..0e679cc50148 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -937,6 +937,7 @@ config I2C_OMAP
tristate "OMAP I2C adapter"
depends on ARCH_OMAP || ARCH_K3 || COMPILE_TEST
default MACH_OMAP_OSK
+ select MULTIPLEXER
help
If you say yes to this option, support will be included for the
I2C interface on the Texas Instruments OMAP1/2 family of processors.
diff --git a/drivers/i2c/busses/i2c-designware-master.c b/drivers/i2c/busses/i2c-designware-master.c
index 28188c6d0555..52dc666c3ef4 100644
--- a/drivers/i2c/busses/i2c-designware-master.c
+++ b/drivers/i2c/busses/i2c-designware-master.c
@@ -346,6 +346,7 @@ static int amd_i2c_dw_xfer_quirk(struct i2c_adapter *adap, struct i2c_msg *msgs,
dev->msgs = msgs;
dev->msgs_num = num_msgs;
+ dev->msg_write_idx = 0;
i2c_dw_xfer_init(dev);
/* Initiate messages read/write transaction */
diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c
index 7b2c5d71a7fc..5ea6d40373e7 100644
--- a/drivers/i2c/busses/i2c-designware-pcidrv.c
+++ b/drivers/i2c/busses/i2c-designware-pcidrv.c
@@ -207,6 +207,7 @@ static const struct software_node dgpu_node = {
static int i2c_dw_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
+ struct device *device = &pdev->dev;
struct dw_i2c_dev *dev;
struct i2c_adapter *adap;
int r;
@@ -214,25 +215,22 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
struct dw_scl_sda_cfg *cfg;
if (id->driver_data >= ARRAY_SIZE(dw_pci_controllers))
- return dev_err_probe(&pdev->dev, -EINVAL,
- "Invalid driver data %ld\n",
+ return dev_err_probe(device, -EINVAL, "Invalid driver data %ld\n",
id->driver_data);
controller = &dw_pci_controllers[id->driver_data];
r = pcim_enable_device(pdev);
if (r)
- return dev_err_probe(&pdev->dev, r,
- "Failed to enable I2C PCI device\n");
+ return dev_err_probe(device, r, "Failed to enable I2C PCI device\n");
pci_set_master(pdev);
r = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev));
if (r)
- return dev_err_probe(&pdev->dev, r,
- "I/O memory remapping failed\n");
+ return dev_err_probe(device, r, "I/O memory remapping failed\n");
- dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
+ dev = devm_kzalloc(device, sizeof(*dev), GFP_KERNEL);
if (!dev)
return -ENOMEM;
@@ -242,7 +240,7 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
dev->get_clk_rate_khz = controller->get_clk_rate_khz;
dev->base = pcim_iomap_table(pdev)[0];
- dev->dev = &pdev->dev;
+ dev->dev = device;
dev->irq = pci_irq_vector(pdev, 0);
dev->flags |= controller->flags;
@@ -280,15 +278,17 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
if ((dev->flags & MODEL_MASK) == MODEL_AMD_NAVI_GPU) {
dev->slave = i2c_new_ccgx_ucsi(&dev->adapter, dev->irq, &dgpu_node);
- if (IS_ERR(dev->slave))
- return dev_err_probe(dev->dev, PTR_ERR(dev->slave),
+ if (IS_ERR(dev->slave)) {
+ i2c_del_adapter(&dev->adapter);
+ return dev_err_probe(device, PTR_ERR(dev->slave),
"register UCSI failed\n");
+ }
}
- pm_runtime_set_autosuspend_delay(&pdev->dev, 1000);
- pm_runtime_use_autosuspend(&pdev->dev);
- pm_runtime_put_autosuspend(&pdev->dev);
- pm_runtime_allow(&pdev->dev);
+ pm_runtime_set_autosuspend_delay(device, 1000);
+ pm_runtime_use_autosuspend(device);
+ pm_runtime_put_autosuspend(device);
+ pm_runtime_allow(device);
return 0;
}
@@ -296,11 +296,12 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
static void i2c_dw_pci_remove(struct pci_dev *pdev)
{
struct dw_i2c_dev *dev = pci_get_drvdata(pdev);
+ struct device *device = &pdev->dev;
i2c_dw_disable(dev);
- pm_runtime_forbid(&pdev->dev);
- pm_runtime_get_noresume(&pdev->dev);
+ pm_runtime_forbid(device);
+ pm_runtime_get_noresume(device);
i2c_del_adapter(&dev->adapter);
}
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index 2d0c7348e491..a3e86930bf41 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -205,6 +205,7 @@ static void i2c_dw_remove_lock_support(struct dw_i2c_dev *dev)
static int dw_i2c_plat_probe(struct platform_device *pdev)
{
+ struct device *device = &pdev->dev;
struct i2c_adapter *adap;
struct dw_i2c_dev *dev;
int irq, ret;
@@ -213,15 +214,15 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
if (irq < 0)
return irq;
- dev = devm_kzalloc(&pdev->dev, sizeof(struct dw_i2c_dev), GFP_KERNEL);
+ dev = devm_kzalloc(device, sizeof(*dev), GFP_KERNEL);
if (!dev)
return -ENOMEM;
- dev->flags = (uintptr_t)device_get_match_data(&pdev->dev);
- if (device_property_present(&pdev->dev, "wx,i2c-snps-model"))
+ dev->flags = (uintptr_t)device_get_match_data(device);
+ if (device_property_present(device, "wx,i2c-snps-model"))
dev->flags = MODEL_WANGXUN_SP | ACCESS_POLLING;
- dev->dev = &pdev->dev;
+ dev->dev = device;
dev->irq = irq;
platform_set_drvdata(pdev, dev);
@@ -229,7 +230,7 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
if (ret)
return ret;
- dev->rst = devm_reset_control_get_optional_exclusive(&pdev->dev, NULL);
+ dev->rst = devm_reset_control_get_optional_exclusive(device, NULL);
if (IS_ERR(dev->rst))
return PTR_ERR(dev->rst);
@@ -246,13 +247,13 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
i2c_dw_configure(dev);
/* Optional interface clock */
- dev->pclk = devm_clk_get_optional(&pdev->dev, "pclk");
+ dev->pclk = devm_clk_get_optional(device, "pclk");
if (IS_ERR(dev->pclk)) {
ret = PTR_ERR(dev->pclk);
goto exit_reset;
}
- dev->clk = devm_clk_get_optional(&pdev->dev, NULL);
+ dev->clk = devm_clk_get_optional(device, NULL);
if (IS_ERR(dev->clk)) {
ret = PTR_ERR(dev->clk);
goto exit_reset;
@@ -280,28 +281,24 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
I2C_CLASS_HWMON : I2C_CLASS_DEPRECATED;
adap->nr = -1;
- if (dev->flags & ACCESS_NO_IRQ_SUSPEND) {
- dev_pm_set_driver_flags(&pdev->dev,
- DPM_FLAG_SMART_PREPARE);
- } else {
- dev_pm_set_driver_flags(&pdev->dev,
- DPM_FLAG_SMART_PREPARE |
- DPM_FLAG_SMART_SUSPEND);
- }
+ if (dev->flags & ACCESS_NO_IRQ_SUSPEND)
+ dev_pm_set_driver_flags(device, DPM_FLAG_SMART_PREPARE);
+ else
+ dev_pm_set_driver_flags(device, DPM_FLAG_SMART_PREPARE | DPM_FLAG_SMART_SUSPEND);
- device_enable_async_suspend(&pdev->dev);
+ device_enable_async_suspend(device);
/* The code below assumes runtime PM to be disabled. */
- WARN_ON(pm_runtime_enabled(&pdev->dev));
+ WARN_ON(pm_runtime_enabled(device));
- pm_runtime_set_autosuspend_delay(&pdev->dev, 1000);
- pm_runtime_use_autosuspend(&pdev->dev);
- pm_runtime_set_active(&pdev->dev);
+ pm_runtime_set_autosuspend_delay(device, 1000);
+ pm_runtime_use_autosuspend(device);
+ pm_runtime_set_active(device);
if (dev->shared_with_punit)
- pm_runtime_get_noresume(&pdev->dev);
+ pm_runtime_get_noresume(device);
- pm_runtime_enable(&pdev->dev);
+ pm_runtime_enable(device);
ret = i2c_dw_probe(dev);
if (ret)
@@ -319,15 +316,16 @@ exit_reset:
static void dw_i2c_plat_remove(struct platform_device *pdev)
{
struct dw_i2c_dev *dev = platform_get_drvdata(pdev);
+ struct device *device = &pdev->dev;
- pm_runtime_get_sync(&pdev->dev);
+ pm_runtime_get_sync(device);
i2c_del_adapter(&dev->adapter);
i2c_dw_disable(dev);
- pm_runtime_dont_use_autosuspend(&pdev->dev);
- pm_runtime_put_sync(&pdev->dev);
+ pm_runtime_dont_use_autosuspend(device);
+ pm_runtime_put_sync(device);
dw_i2c_plat_pm_cleanup(dev);
i2c_dw_remove_lock_support(dev);
diff --git a/drivers/i2c/busses/i2c-designware-slave.c b/drivers/i2c/busses/i2c-designware-slave.c
index f0f0f1f2131d..602e98e61cc0 100644
--- a/drivers/i2c/busses/i2c-designware-slave.c
+++ b/drivers/i2c/busses/i2c-designware-slave.c
@@ -94,7 +94,7 @@ static int i2c_dw_unreg_slave(struct i2c_client *slave)
i2c_dw_disable(dev);
synchronize_irq(dev->irq);
dev->slave = NULL;
- pm_runtime_put(dev->dev);
+ pm_runtime_put_sync_suspend(dev->dev);
return 0;
}
diff --git a/drivers/i2c/busses/i2c-imx-lpi2c.c b/drivers/i2c/busses/i2c-imx-lpi2c.c
index 976d43f73f38..86b41cd48ad4 100644
--- a/drivers/i2c/busses/i2c-imx-lpi2c.c
+++ b/drivers/i2c/busses/i2c-imx-lpi2c.c
@@ -652,9 +652,9 @@ static int lpi2c_imx_probe(struct platform_device *pdev)
return 0;
rpm_disable:
- pm_runtime_put(&pdev->dev);
- pm_runtime_disable(&pdev->dev);
pm_runtime_dont_use_autosuspend(&pdev->dev);
+ pm_runtime_put_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
return ret;
}
diff --git a/drivers/i2c/busses/i2c-npcm7xx.c b/drivers/i2c/busses/i2c-npcm7xx.c
index a693ebb64edf..7b6eb2bfb412 100644
--- a/drivers/i2c/busses/i2c-npcm7xx.c
+++ b/drivers/i2c/busses/i2c-npcm7xx.c
@@ -1969,10 +1969,14 @@ static int npcm_i2c_init_module(struct npcm_i2c *bus, enum i2c_mode mode,
/* Check HW is OK: SDA and SCL should be high at this point. */
if ((npcm_i2c_get_SDA(&bus->adap) == 0) || (npcm_i2c_get_SCL(&bus->adap) == 0)) {
- dev_err(bus->dev, "I2C%d init fail: lines are low\n", bus->num);
- dev_err(bus->dev, "SDA=%d SCL=%d\n", npcm_i2c_get_SDA(&bus->adap),
- npcm_i2c_get_SCL(&bus->adap));
- return -ENXIO;
+ dev_warn(bus->dev, " I2C%d SDA=%d SCL=%d, attempting to recover\n", bus->num,
+ npcm_i2c_get_SDA(&bus->adap), npcm_i2c_get_SCL(&bus->adap));
+ if (npcm_i2c_recovery_tgclk(&bus->adap)) {
+ dev_err(bus->dev, "I2C%d init fail: SDA=%d SCL=%d\n",
+ bus->num, npcm_i2c_get_SDA(&bus->adap),
+ npcm_i2c_get_SCL(&bus->adap));
+ return -ENXIO;
+ }
}
npcm_i2c_int_enable(bus, true);
diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index 8c9cf08ad45e..0bdee43dc134 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -24,6 +24,7 @@
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/io.h>
+#include <linux/mux/consumer.h>
#include <linux/of.h>
#include <linux/slab.h>
#include <linux/platform_data/i2c-omap.h>
@@ -211,6 +212,7 @@ struct omap_i2c_dev {
u16 syscstate;
u16 westate;
u16 errata;
+ struct mux_state *mux_state;
};
static const u8 reg_map_ip_v1[] = {
@@ -1452,8 +1454,27 @@ omap_i2c_probe(struct platform_device *pdev)
(1000 * omap->speed / 8);
}
+ if (of_property_present(node, "mux-states")) {
+ struct mux_state *mux_state;
+
+ mux_state = devm_mux_state_get(&pdev->dev, NULL);
+ if (IS_ERR(mux_state)) {
+ r = PTR_ERR(mux_state);
+ dev_dbg(&pdev->dev, "failed to get I2C mux: %d\n", r);
+ goto err_put_pm;
+ }
+ omap->mux_state = mux_state;
+ r = mux_state_select(omap->mux_state);
+ if (r) {
+ dev_err(&pdev->dev, "failed to select I2C mux: %d\n", r);
+ goto err_put_pm;
+ }
+ }
+
/* reset ASAP, clearing any IRQs */
- omap_i2c_init(omap);
+ r = omap_i2c_init(omap);
+ if (r)
+ goto err_mux_state_deselect;
if (omap->rev < OMAP_I2C_OMAP1_REV_2)
r = devm_request_irq(&pdev->dev, omap->irq, omap_i2c_omap1_isr,
@@ -1496,6 +1517,10 @@ omap_i2c_probe(struct platform_device *pdev)
err_unuse_clocks:
omap_i2c_write_reg(omap, OMAP_I2C_CON_REG, 0);
+err_mux_state_deselect:
+ if (omap->mux_state)
+ mux_state_deselect(omap->mux_state);
+err_put_pm:
pm_runtime_dont_use_autosuspend(omap->dev);
pm_runtime_put_sync(omap->dev);
err_disable_pm:
@@ -1511,6 +1536,9 @@ static void omap_i2c_remove(struct platform_device *pdev)
i2c_del_adapter(&omap->adapter);
+ if (omap->mux_state)
+ mux_state_deselect(omap->mux_state);
+
ret = pm_runtime_get_sync(&pdev->dev);
if (ret < 0)
dev_err(omap->dev, "Failed to resume hardware, skip disable\n");
diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index 4d76e71cdd4b..afc1a8171f59 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -1503,7 +1503,10 @@ static int i2c_pxa_probe(struct platform_device *dev)
i2c->adap.name);
}
- clk_prepare_enable(i2c->clk);
+ ret = clk_prepare_enable(i2c->clk);
+ if (ret)
+ return dev_err_probe(&dev->dev, ret,
+ "failed to enable clock\n");
if (i2c->use_pio) {
i2c->adap.algo = &i2c_pxa_pio_algorithm;
diff --git a/drivers/i2c/busses/i2c-qup.c b/drivers/i2c/busses/i2c-qup.c
index d480162a4d39..592b754f48e9 100644
--- a/drivers/i2c/busses/i2c-qup.c
+++ b/drivers/i2c/busses/i2c-qup.c
@@ -14,6 +14,7 @@
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/i2c.h>
+#include <linux/interconnect.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/module.h>
@@ -150,6 +151,8 @@
/* TAG length for DATA READ in RX FIFO */
#define READ_RX_TAGS_LEN 2
+#define QUP_BUS_WIDTH 8
+
static unsigned int scl_freq;
module_param_named(scl_freq, scl_freq, uint, 0444);
MODULE_PARM_DESC(scl_freq, "SCL frequency override");
@@ -227,6 +230,7 @@ struct qup_i2c_dev {
int irq;
struct clk *clk;
struct clk *pclk;
+ struct icc_path *icc_path;
struct i2c_adapter adap;
int clk_ctl;
@@ -255,6 +259,10 @@ struct qup_i2c_dev {
/* To configure when bus is in run state */
u32 config_run;
+ /* bandwidth votes */
+ u32 src_clk_freq;
+ u32 cur_bw_clk_freq;
+
/* dma parameters */
bool is_dma;
/* To check if the current transfer is using DMA */
@@ -444,8 +452,10 @@ static int qup_i2c_bus_active(struct qup_i2c_dev *qup, int len)
if (!(status & I2C_STATUS_BUS_ACTIVE))
break;
- if (time_after(jiffies, timeout))
+ if (time_after(jiffies, timeout)) {
ret = -ETIMEDOUT;
+ break;
+ }
usleep_range(len, len * 2);
}
@@ -453,6 +463,23 @@ static int qup_i2c_bus_active(struct qup_i2c_dev *qup, int len)
return ret;
}
+static int qup_i2c_vote_bw(struct qup_i2c_dev *qup, u32 clk_freq)
+{
+ u32 needed_peak_bw;
+ int ret;
+
+ if (qup->cur_bw_clk_freq == clk_freq)
+ return 0;
+
+ needed_peak_bw = Bps_to_icc(clk_freq * QUP_BUS_WIDTH);
+ ret = icc_set_bw(qup->icc_path, 0, needed_peak_bw);
+ if (ret)
+ return ret;
+
+ qup->cur_bw_clk_freq = clk_freq;
+ return 0;
+}
+
static void qup_i2c_write_tx_fifo_v1(struct qup_i2c_dev *qup)
{
struct qup_i2c_block *blk = &qup->blk;
@@ -838,6 +865,10 @@ static int qup_i2c_bam_xfer(struct i2c_adapter *adap, struct i2c_msg *msg,
int ret = 0;
int idx = 0;
+ ret = qup_i2c_vote_bw(qup, qup->src_clk_freq);
+ if (ret)
+ return ret;
+
enable_irq(qup->irq);
ret = qup_i2c_req_dma(qup);
@@ -1643,6 +1674,7 @@ static void qup_i2c_disable_clocks(struct qup_i2c_dev *qup)
config = readl(qup->base + QUP_CONFIG);
config |= QUP_CLOCK_AUTO_GATE;
writel(config, qup->base + QUP_CONFIG);
+ qup_i2c_vote_bw(qup, 0);
clk_disable_unprepare(qup->pclk);
}
@@ -1743,6 +1775,11 @@ static int qup_i2c_probe(struct platform_device *pdev)
goto fail_dma;
}
qup->is_dma = true;
+
+ qup->icc_path = devm_of_icc_get(&pdev->dev, NULL);
+ if (IS_ERR(qup->icc_path))
+ return dev_err_probe(&pdev->dev, PTR_ERR(qup->icc_path),
+ "failed to get interconnect path\n");
}
nodma:
@@ -1791,6 +1828,7 @@ nodma:
qup_i2c_enable_clocks(qup);
src_clk_freq = clk_get_rate(qup->clk);
}
+ qup->src_clk_freq = src_clk_freq;
/*
* Bootloaders might leave a pending interrupt on certain QUP's,
diff --git a/drivers/i2c/busses/i2c-robotfuzz-osif.c b/drivers/i2c/busses/i2c-robotfuzz-osif.c
index 80d45079b763..e0a76fb5bc31 100644
--- a/drivers/i2c/busses/i2c-robotfuzz-osif.c
+++ b/drivers/i2c/busses/i2c-robotfuzz-osif.c
@@ -111,6 +111,11 @@ static u32 osif_func(struct i2c_adapter *adapter)
return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
}
+/* prevent invalid 0-length usb_control_msg */
+static const struct i2c_adapter_quirks osif_quirks = {
+ .flags = I2C_AQ_NO_ZERO_LEN_READ,
+};
+
static const struct i2c_algorithm osif_algorithm = {
.xfer = osif_xfer,
.functionality = osif_func,
@@ -143,6 +148,7 @@ static int osif_probe(struct usb_interface *interface,
priv->adapter.owner = THIS_MODULE;
priv->adapter.class = I2C_CLASS_HWMON;
+ priv->adapter.quirks = &osif_quirks;
priv->adapter.algo = &osif_algorithm;
priv->adapter.algo_data = priv;
snprintf(priv->adapter.name, sizeof(priv->adapter.name),
diff --git a/drivers/i2c/busses/i2c-stm32.c b/drivers/i2c/busses/i2c-stm32.c
index 157c64e27d0b..f84ec056e36d 100644
--- a/drivers/i2c/busses/i2c-stm32.c
+++ b/drivers/i2c/busses/i2c-stm32.c
@@ -102,7 +102,6 @@ int stm32_i2c_prep_dma_xfer(struct device *dev, struct stm32_i2c_dma *dma,
void *dma_async_param)
{
struct dma_async_tx_descriptor *txdesc;
- struct device *chan_dev;
int ret;
if (rd_wr) {
@@ -116,11 +115,10 @@ int stm32_i2c_prep_dma_xfer(struct device *dev, struct stm32_i2c_dma *dma,
}
dma->dma_len = len;
- chan_dev = dma->chan_using->device->dev;
- dma->dma_buf = dma_map_single(chan_dev, buf, dma->dma_len,
+ dma->dma_buf = dma_map_single(dev, buf, dma->dma_len,
dma->dma_data_dir);
- if (dma_mapping_error(chan_dev, dma->dma_buf)) {
+ if (dma_mapping_error(dev, dma->dma_buf)) {
dev_err(dev, "DMA mapping failed\n");
return -EINVAL;
}
@@ -150,7 +148,7 @@ int stm32_i2c_prep_dma_xfer(struct device *dev, struct stm32_i2c_dma *dma,
return 0;
err:
- dma_unmap_single(chan_dev, dma->dma_buf, dma->dma_len,
+ dma_unmap_single(dev, dma->dma_buf, dma->dma_len,
dma->dma_data_dir);
return ret;
}
diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
index 0174ead99de6..a4587f281216 100644
--- a/drivers/i2c/busses/i2c-stm32f7.c
+++ b/drivers/i2c/busses/i2c-stm32f7.c
@@ -739,12 +739,13 @@ static void stm32f7_i2c_disable_dma_req(struct stm32f7_i2c_dev *i2c_dev)
static void stm32f7_i2c_dma_callback(void *arg)
{
- struct stm32f7_i2c_dev *i2c_dev = (struct stm32f7_i2c_dev *)arg;
+ struct stm32f7_i2c_dev *i2c_dev = arg;
struct stm32_i2c_dma *dma = i2c_dev->dma;
- struct device *dev = dma->chan_using->device->dev;
stm32f7_i2c_disable_dma_req(i2c_dev);
- dma_unmap_single(dev, dma->dma_buf, dma->dma_len, dma->dma_data_dir);
+ dmaengine_terminate_async(dma->chan_using);
+ dma_unmap_single(i2c_dev->dev, dma->dma_buf, dma->dma_len,
+ dma->dma_data_dir);
complete(&dma->dma_complete);
}
@@ -1510,7 +1511,6 @@ static irqreturn_t stm32f7_i2c_handle_isr_errs(struct stm32f7_i2c_dev *i2c_dev,
u16 addr = f7_msg->addr;
void __iomem *base = i2c_dev->base;
struct device *dev = i2c_dev->dev;
- struct stm32_i2c_dma *dma = i2c_dev->dma;
/* Bus error */
if (status & STM32F7_I2C_ISR_BERR) {
@@ -1551,10 +1551,8 @@ static irqreturn_t stm32f7_i2c_handle_isr_errs(struct stm32f7_i2c_dev *i2c_dev,
}
/* Disable dma */
- if (i2c_dev->use_dma) {
- stm32f7_i2c_disable_dma_req(i2c_dev);
- dmaengine_terminate_async(dma->chan_using);
- }
+ if (i2c_dev->use_dma)
+ stm32f7_i2c_dma_callback(i2c_dev);
i2c_dev->master_mode = false;
complete(&i2c_dev->complete);
@@ -1600,7 +1598,6 @@ static irqreturn_t stm32f7_i2c_isr_event_thread(int irq, void *data)
{
struct stm32f7_i2c_dev *i2c_dev = data;
struct stm32f7_i2c_msg *f7_msg = &i2c_dev->f7_msg;
- struct stm32_i2c_dma *dma = i2c_dev->dma;
void __iomem *base = i2c_dev->base;
u32 status, mask;
int ret;
@@ -1619,10 +1616,8 @@ static irqreturn_t stm32f7_i2c_isr_event_thread(int irq, void *data)
dev_dbg(i2c_dev->dev, "<%s>: Receive NACK (addr %x)\n",
__func__, f7_msg->addr);
writel_relaxed(STM32F7_I2C_ICR_NACKCF, base + STM32F7_I2C_ICR);
- if (i2c_dev->use_dma) {
- stm32f7_i2c_disable_dma_req(i2c_dev);
- dmaengine_terminate_async(dma->chan_using);
- }
+ if (i2c_dev->use_dma)
+ stm32f7_i2c_dma_callback(i2c_dev);
f7_msg->result = -ENXIO;
}
@@ -1640,8 +1635,7 @@ static irqreturn_t stm32f7_i2c_isr_event_thread(int irq, void *data)
ret = wait_for_completion_timeout(&i2c_dev->dma->dma_complete, HZ);
if (!ret) {
dev_dbg(i2c_dev->dev, "<%s>: Timed out\n", __func__);
- stm32f7_i2c_disable_dma_req(i2c_dev);
- dmaengine_terminate_async(dma->chan_using);
+ stm32f7_i2c_dma_callback(i2c_dev);
f7_msg->result = -ETIMEDOUT;
}
}
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 1df5b4204142..fbab82d457fb 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -607,7 +607,6 @@ static int tegra_i2c_wait_for_config_load(struct tegra_i2c_dev *i2c_dev)
static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
{
u32 val, clk_divisor, clk_multiplier, tsu_thd, tlow, thigh, non_hs_mode;
- acpi_handle handle = ACPI_HANDLE(i2c_dev->dev);
struct i2c_timings *t = &i2c_dev->timings;
int err;
@@ -619,11 +618,7 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
* emit a noisy warning on error, which won't stay unnoticed and
* won't hose machine entirely.
*/
- if (handle)
- err = acpi_evaluate_object(handle, "_RST", NULL, NULL);
- else
- err = reset_control_reset(i2c_dev->rst);
-
+ err = device_reset(i2c_dev->dev);
WARN_ON_ONCE(err);
if (IS_DVC(i2c_dev))
@@ -1395,6 +1390,11 @@ static int tegra_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
ret = tegra_i2c_xfer_msg(i2c_dev, &msgs[i], MSG_END_CONTINUE);
if (ret)
break;
+
+ /* Validate message length before proceeding */
+ if (msgs[i].buf[0] == 0 || msgs[i].buf[0] > I2C_SMBUS_BLOCK_MAX)
+ break;
+
/* Set the msg length from first byte */
msgs[i].len += msgs[i].buf[0];
dev_dbg(i2c_dev->dev, "reading %d bytes\n", msgs[i].len);
@@ -1661,19 +1661,6 @@ static void tegra_i2c_parse_dt(struct tegra_i2c_dev *i2c_dev)
i2c_dev->is_vi = true;
}
-static int tegra_i2c_init_reset(struct tegra_i2c_dev *i2c_dev)
-{
- if (ACPI_HANDLE(i2c_dev->dev))
- return 0;
-
- i2c_dev->rst = devm_reset_control_get_exclusive(i2c_dev->dev, "i2c");
- if (IS_ERR(i2c_dev->rst))
- return dev_err_probe(i2c_dev->dev, PTR_ERR(i2c_dev->rst),
- "failed to get reset control\n");
-
- return 0;
-}
-
static int tegra_i2c_init_clocks(struct tegra_i2c_dev *i2c_dev)
{
int err;
@@ -1783,10 +1770,6 @@ static int tegra_i2c_probe(struct platform_device *pdev)
tegra_i2c_parse_dt(i2c_dev);
- err = tegra_i2c_init_reset(i2c_dev);
- if (err)
- return err;
-
err = tegra_i2c_init_clocks(i2c_dev);
if (err)
return err;
diff --git a/drivers/i2c/busses/i2c-tiny-usb.c b/drivers/i2c/busses/i2c-tiny-usb.c
index 0f2ed181b266..0cc7c0a816fc 100644
--- a/drivers/i2c/busses/i2c-tiny-usb.c
+++ b/drivers/i2c/busses/i2c-tiny-usb.c
@@ -138,6 +138,11 @@ out:
return ret;
}
+/* prevent invalid 0-length usb_control_msg */
+static const struct i2c_adapter_quirks usb_quirks = {
+ .flags = I2C_AQ_NO_ZERO_LEN_READ,
+};
+
/* This is the actual algorithm we define */
static const struct i2c_algorithm usb_algorithm = {
.xfer = usb_xfer,
@@ -246,6 +251,7 @@ static int i2c_tiny_usb_probe(struct usb_interface *interface,
/* setup i2c adapter description */
dev->adapter.owner = THIS_MODULE;
dev->adapter.class = I2C_CLASS_HWMON;
+ dev->adapter.quirks = &usb_quirks;
dev->adapter.algo = &usb_algorithm;
dev->adapter.algo_data = dev;
snprintf(dev->adapter.name, sizeof(dev->adapter.name),
diff --git a/drivers/i2c/busses/i2c-virtio.c b/drivers/i2c/busses/i2c-virtio.c
index 2a351f961b89..c8c40ff9765d 100644
--- a/drivers/i2c/busses/i2c-virtio.c
+++ b/drivers/i2c/busses/i2c-virtio.c
@@ -116,15 +116,16 @@ static int virtio_i2c_complete_reqs(struct virtqueue *vq,
for (i = 0; i < num; i++) {
struct virtio_i2c_req *req = &reqs[i];
- wait_for_completion(&req->completion);
-
- if (!failed && req->in_hdr.status != VIRTIO_I2C_MSG_OK)
- failed = true;
+ if (!failed) {
+ if (wait_for_completion_interruptible(&req->completion))
+ failed = true;
+ else if (req->in_hdr.status != VIRTIO_I2C_MSG_OK)
+ failed = true;
+ else
+ j++;
+ }
i2c_put_dma_safe_msg_buf(reqs[i].buf, &msgs[i], !failed);
-
- if (!failed)
- j++;
}
return j;
diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c
index d2499f302b50..f43067f6797e 100644
--- a/drivers/i2c/i2c-core-acpi.c
+++ b/drivers/i2c/i2c-core-acpi.c
@@ -370,6 +370,7 @@ static const struct acpi_device_id i2c_acpi_force_100khz_device_ids[] = {
* the device works without issues on Windows at what is expected to be
* a 400KHz frequency. The root cause of the issue is not known.
*/
+ { "DLL0945", 0 },
{ "ELAN06FA", 0 },
{}
};
diff --git a/drivers/i2c/muxes/i2c-mux-mule.c b/drivers/i2c/muxes/i2c-mux-mule.c
index 284ff4afeeac..d3b32b794172 100644
--- a/drivers/i2c/muxes/i2c-mux-mule.c
+++ b/drivers/i2c/muxes/i2c-mux-mule.c
@@ -47,7 +47,6 @@ static int mule_i2c_mux_probe(struct platform_device *pdev)
struct mule_i2c_reg_mux *priv;
struct i2c_client *client;
struct i2c_mux_core *muxc;
- struct device_node *dev;
unsigned int readback;
int ndev, ret;
bool old_fw;
@@ -95,7 +94,7 @@ static int mule_i2c_mux_probe(struct platform_device *pdev)
"Failed to register mux remove\n");
/* Create device adapters */
- for_each_child_of_node(mux_dev->of_node, dev) {
+ for_each_child_of_node_scoped(mux_dev->of_node, dev) {
u32 reg;
ret = of_property_read_u32(dev, "reg", &reg);
generated by cgit v1.2.3 (git 2.39.0) at 2025-08-21 20:16:01 +0300