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-rw-r--r--drivers/i2c/algos/i2c-algo-pca.c35
-rw-r--r--drivers/i2c/busses/i2c-aspeed.c2
-rw-r--r--drivers/i2c/busses/i2c-bcm-iproc.c4
-rw-r--r--drivers/i2c/busses/i2c-cpm.c3
-rw-r--r--drivers/i2c/busses/i2c-i801.c27
-rw-r--r--drivers/i2c/busses/i2c-meson.c52
-rw-r--r--drivers/i2c/busses/i2c-mt65xx.c6
-rw-r--r--drivers/i2c/busses/i2c-mxs.c10
-rw-r--r--drivers/i2c/busses/i2c-npcm7xx.c17
-rw-r--r--drivers/i2c/busses/i2c-omap.c1
-rw-r--r--drivers/i2c/busses/i2c-opal.c2
-rw-r--r--drivers/i2c/busses/i2c-owl.c6
-rw-r--r--drivers/i2c/busses/i2c-rcar.c1
-rw-r--r--drivers/i2c/i2c-core-acpi.c10
-rw-r--r--drivers/i2c/i2c-core-base.c4
-rw-r--r--drivers/i2c/i2c-core.h9
16 files changed, 115 insertions, 74 deletions
diff --git a/drivers/i2c/algos/i2c-algo-pca.c b/drivers/i2c/algos/i2c-algo-pca.c
index 710fbef9a9c2..384af88e58ad 100644
--- a/drivers/i2c/algos/i2c-algo-pca.c
+++ b/drivers/i2c/algos/i2c-algo-pca.c
@@ -41,8 +41,22 @@ static void pca_reset(struct i2c_algo_pca_data *adap)
pca_outw(adap, I2C_PCA_INDPTR, I2C_PCA_IPRESET);
pca_outw(adap, I2C_PCA_IND, 0xA5);
pca_outw(adap, I2C_PCA_IND, 0x5A);
+
+ /*
+ * After a reset we need to re-apply any configuration
+ * (calculated in pca_init) to get the bus in a working state.
+ */
+ pca_outw(adap, I2C_PCA_INDPTR, I2C_PCA_IMODE);
+ pca_outw(adap, I2C_PCA_IND, adap->bus_settings.mode);
+ pca_outw(adap, I2C_PCA_INDPTR, I2C_PCA_ISCLL);
+ pca_outw(adap, I2C_PCA_IND, adap->bus_settings.tlow);
+ pca_outw(adap, I2C_PCA_INDPTR, I2C_PCA_ISCLH);
+ pca_outw(adap, I2C_PCA_IND, adap->bus_settings.thi);
+
+ pca_set_con(adap, I2C_PCA_CON_ENSIO);
} else {
adap->reset_chip(adap->data);
+ pca_set_con(adap, I2C_PCA_CON_ENSIO | adap->bus_settings.clock_freq);
}
}
@@ -423,13 +437,14 @@ static int pca_init(struct i2c_adapter *adap)
" Use the nominal frequency.\n", adap->name);
}
- pca_reset(pca_data);
-
clock = pca_clock(pca_data);
printk(KERN_INFO "%s: Clock frequency is %dkHz\n",
adap->name, freqs[clock]);
- pca_set_con(pca_data, I2C_PCA_CON_ENSIO | clock);
+ /* Store settings as these will be needed when the PCA chip is reset */
+ pca_data->bus_settings.clock_freq = clock;
+
+ pca_reset(pca_data);
} else {
int clock;
int mode;
@@ -496,19 +511,15 @@ static int pca_init(struct i2c_adapter *adap)
thi = tlow * min_thi / min_tlow;
}
+ /* Store settings as these will be needed when the PCA chip is reset */
+ pca_data->bus_settings.mode = mode;
+ pca_data->bus_settings.tlow = tlow;
+ pca_data->bus_settings.thi = thi;
+
pca_reset(pca_data);
printk(KERN_INFO
"%s: Clock frequency is %dHz\n", adap->name, clock * 100);
-
- pca_outw(pca_data, I2C_PCA_INDPTR, I2C_PCA_IMODE);
- pca_outw(pca_data, I2C_PCA_IND, mode);
- pca_outw(pca_data, I2C_PCA_INDPTR, I2C_PCA_ISCLL);
- pca_outw(pca_data, I2C_PCA_IND, tlow);
- pca_outw(pca_data, I2C_PCA_INDPTR, I2C_PCA_ISCLH);
- pca_outw(pca_data, I2C_PCA_IND, thi);
-
- pca_set_con(pca_data, I2C_PCA_CON_ENSIO);
}
udelay(500); /* 500 us for oscillator to stabilise */
diff --git a/drivers/i2c/busses/i2c-aspeed.c b/drivers/i2c/busses/i2c-aspeed.c
index 31268074c422..724bf30600d6 100644
--- a/drivers/i2c/busses/i2c-aspeed.c
+++ b/drivers/i2c/busses/i2c-aspeed.c
@@ -69,6 +69,7 @@
* These share bit definitions, so use the same values for the enable &
* status bits.
*/
+#define ASPEED_I2CD_INTR_RECV_MASK 0xf000ffff
#define ASPEED_I2CD_INTR_SDA_DL_TIMEOUT BIT(14)
#define ASPEED_I2CD_INTR_BUS_RECOVER_DONE BIT(13)
#define ASPEED_I2CD_INTR_SLAVE_MATCH BIT(7)
@@ -604,6 +605,7 @@ static irqreturn_t aspeed_i2c_bus_irq(int irq, void *dev_id)
writel(irq_received & ~ASPEED_I2CD_INTR_RX_DONE,
bus->base + ASPEED_I2C_INTR_STS_REG);
readl(bus->base + ASPEED_I2C_INTR_STS_REG);
+ irq_received &= ASPEED_I2CD_INTR_RECV_MASK;
irq_remaining = irq_received;
#if IS_ENABLED(CONFIG_I2C_SLAVE)
diff --git a/drivers/i2c/busses/i2c-bcm-iproc.c b/drivers/i2c/busses/i2c-bcm-iproc.c
index 688e92818821..d8295b1c379d 100644
--- a/drivers/i2c/busses/i2c-bcm-iproc.c
+++ b/drivers/i2c/busses/i2c-bcm-iproc.c
@@ -720,7 +720,7 @@ static int bcm_iproc_i2c_xfer_internal(struct bcm_iproc_i2c_dev *iproc_i2c,
/* mark the last byte */
if (!process_call && (i == msg->len - 1))
- val |= 1 << M_TX_WR_STATUS_SHIFT;
+ val |= BIT(M_TX_WR_STATUS_SHIFT);
iproc_i2c_wr_reg(iproc_i2c, M_TX_OFFSET, val);
}
@@ -738,7 +738,7 @@ static int bcm_iproc_i2c_xfer_internal(struct bcm_iproc_i2c_dev *iproc_i2c,
*/
addr = i2c_8bit_addr_from_msg(msg);
/* mark it the last byte out */
- val = addr | (1 << M_TX_WR_STATUS_SHIFT);
+ val = addr | BIT(M_TX_WR_STATUS_SHIFT);
iproc_i2c_wr_reg(iproc_i2c, M_TX_OFFSET, val);
}
diff --git a/drivers/i2c/busses/i2c-cpm.c b/drivers/i2c/busses/i2c-cpm.c
index 1213e1932ccb..24d584a1c9a7 100644
--- a/drivers/i2c/busses/i2c-cpm.c
+++ b/drivers/i2c/busses/i2c-cpm.c
@@ -65,6 +65,9 @@ struct i2c_ram {
char res1[4]; /* Reserved */
ushort rpbase; /* Relocation pointer */
char res2[2]; /* Reserved */
+ /* The following elements are only for CPM2 */
+ char res3[4]; /* Reserved */
+ uint sdmatmp; /* Internal */
};
#define I2COM_START 0x80
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index dbcaf1d0cd37..ae90713443fa 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -1713,6 +1713,16 @@ static inline int i801_acpi_probe(struct i801_priv *priv) { return 0; }
static inline void i801_acpi_remove(struct i801_priv *priv) { }
#endif
+static unsigned char i801_setup_hstcfg(struct i801_priv *priv)
+{
+ unsigned char hstcfg = priv->original_hstcfg;
+
+ hstcfg &= ~SMBHSTCFG_I2C_EN; /* SMBus timing */
+ hstcfg |= SMBHSTCFG_HST_EN;
+ pci_write_config_byte(priv->pci_dev, SMBHSTCFG, hstcfg);
+ return hstcfg;
+}
+
static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
unsigned char temp;
@@ -1835,14 +1845,10 @@ static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id)
return err;
}
- pci_read_config_byte(priv->pci_dev, SMBHSTCFG, &temp);
- priv->original_hstcfg = temp;
- temp &= ~SMBHSTCFG_I2C_EN; /* SMBus timing */
- if (!(temp & SMBHSTCFG_HST_EN)) {
+ pci_read_config_byte(priv->pci_dev, SMBHSTCFG, &priv->original_hstcfg);
+ temp = i801_setup_hstcfg(priv);
+ if (!(priv->original_hstcfg & SMBHSTCFG_HST_EN))
dev_info(&dev->dev, "Enabling SMBus device\n");
- temp |= SMBHSTCFG_HST_EN;
- }
- pci_write_config_byte(priv->pci_dev, SMBHSTCFG, temp);
if (temp & SMBHSTCFG_SMB_SMI_EN) {
dev_dbg(&dev->dev, "SMBus using interrupt SMI#\n");
@@ -1916,6 +1922,7 @@ static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id)
pci_set_drvdata(dev, priv);
+ dev_pm_set_driver_flags(&dev->dev, DPM_FLAG_NO_DIRECT_COMPLETE);
pm_runtime_set_autosuspend_delay(&dev->dev, 1000);
pm_runtime_use_autosuspend(&dev->dev);
pm_runtime_put_autosuspend(&dev->dev);
@@ -1957,10 +1964,9 @@ static void i801_shutdown(struct pci_dev *dev)
#ifdef CONFIG_PM_SLEEP
static int i801_suspend(struct device *dev)
{
- struct pci_dev *pci_dev = to_pci_dev(dev);
- struct i801_priv *priv = pci_get_drvdata(pci_dev);
+ struct i801_priv *priv = dev_get_drvdata(dev);
- pci_write_config_byte(pci_dev, SMBHSTCFG, priv->original_hstcfg);
+ pci_write_config_byte(priv->pci_dev, SMBHSTCFG, priv->original_hstcfg);
return 0;
}
@@ -1968,6 +1974,7 @@ static int i801_resume(struct device *dev)
{
struct i801_priv *priv = dev_get_drvdata(dev);
+ i801_setup_hstcfg(priv);
i801_enable_host_notify(&priv->adapter);
return 0;
diff --git a/drivers/i2c/busses/i2c-meson.c b/drivers/i2c/busses/i2c-meson.c
index c5dec572fc48..ef73a42577cc 100644
--- a/drivers/i2c/busses/i2c-meson.c
+++ b/drivers/i2c/busses/i2c-meson.c
@@ -5,6 +5,7 @@
* Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com>
*/
+#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/completion.h>
#include <linux/i2c.h>
@@ -33,12 +34,17 @@
#define REG_CTRL_ACK_IGNORE BIT(1)
#define REG_CTRL_STATUS BIT(2)
#define REG_CTRL_ERROR BIT(3)
-#define REG_CTRL_CLKDIV_SHIFT 12
-#define REG_CTRL_CLKDIV_MASK GENMASK(21, 12)
-#define REG_CTRL_CLKDIVEXT_SHIFT 28
-#define REG_CTRL_CLKDIVEXT_MASK GENMASK(29, 28)
+#define REG_CTRL_CLKDIV GENMASK(21, 12)
+#define REG_CTRL_CLKDIVEXT GENMASK(29, 28)
+
+#define REG_SLV_ADDR GENMASK(7, 0)
+#define REG_SLV_SDA_FILTER GENMASK(10, 8)
+#define REG_SLV_SCL_FILTER GENMASK(13, 11)
+#define REG_SLV_SCL_LOW GENMASK(27, 16)
+#define REG_SLV_SCL_LOW_EN BIT(28)
#define I2C_TIMEOUT_MS 500
+#define FILTER_DELAY 15
enum {
TOKEN_END = 0,
@@ -133,19 +139,24 @@ static void meson_i2c_set_clk_div(struct meson_i2c *i2c, unsigned int freq)
unsigned long clk_rate = clk_get_rate(i2c->clk);
unsigned int div;
- div = DIV_ROUND_UP(clk_rate, freq * i2c->data->div_factor);
+ div = DIV_ROUND_UP(clk_rate, freq);
+ div -= FILTER_DELAY;
+ div = DIV_ROUND_UP(div, i2c->data->div_factor);
/* clock divider has 12 bits */
- if (div >= (1 << 12)) {
+ if (div > GENMASK(11, 0)) {
dev_err(i2c->dev, "requested bus frequency too low\n");
- div = (1 << 12) - 1;
+ div = GENMASK(11, 0);
}
- meson_i2c_set_mask(i2c, REG_CTRL, REG_CTRL_CLKDIV_MASK,
- (div & GENMASK(9, 0)) << REG_CTRL_CLKDIV_SHIFT);
+ meson_i2c_set_mask(i2c, REG_CTRL, REG_CTRL_CLKDIV,
+ FIELD_PREP(REG_CTRL_CLKDIV, div & GENMASK(9, 0)));
+
+ meson_i2c_set_mask(i2c, REG_CTRL, REG_CTRL_CLKDIVEXT,
+ FIELD_PREP(REG_CTRL_CLKDIVEXT, div >> 10));
- meson_i2c_set_mask(i2c, REG_CTRL, REG_CTRL_CLKDIVEXT_MASK,
- (div >> 10) << REG_CTRL_CLKDIVEXT_SHIFT);
+ /* Disable HIGH/LOW mode */
+ meson_i2c_set_mask(i2c, REG_SLAVE_ADDR, REG_SLV_SCL_LOW_EN, 0);
dev_dbg(i2c->dev, "%s: clk %lu, freq %u, div %u\n", __func__,
clk_rate, freq, div);
@@ -280,7 +291,10 @@ static void meson_i2c_do_start(struct meson_i2c *i2c, struct i2c_msg *msg)
token = (msg->flags & I2C_M_RD) ? TOKEN_SLAVE_ADDR_READ :
TOKEN_SLAVE_ADDR_WRITE;
- writel(msg->addr << 1, i2c->regs + REG_SLAVE_ADDR);
+
+ meson_i2c_set_mask(i2c, REG_SLAVE_ADDR, REG_SLV_ADDR,
+ FIELD_PREP(REG_SLV_ADDR, msg->addr << 1));
+
meson_i2c_add_token(i2c, TOKEN_START);
meson_i2c_add_token(i2c, token);
}
@@ -357,16 +371,12 @@ static int meson_i2c_xfer_messages(struct i2c_adapter *adap,
struct meson_i2c *i2c = adap->algo_data;
int i, ret = 0;
- clk_enable(i2c->clk);
-
for (i = 0; i < num; i++) {
ret = meson_i2c_xfer_msg(i2c, msgs + i, i == num - 1, atomic);
if (ret)
break;
}
- clk_disable(i2c->clk);
-
return ret ?: i;
}
@@ -435,7 +445,7 @@ static int meson_i2c_probe(struct platform_device *pdev)
return ret;
}
- ret = clk_prepare(i2c->clk);
+ ret = clk_prepare_enable(i2c->clk);
if (ret < 0) {
dev_err(&pdev->dev, "can't prepare clock\n");
return ret;
@@ -457,10 +467,14 @@ static int meson_i2c_probe(struct platform_device *pdev)
ret = i2c_add_adapter(&i2c->adap);
if (ret < 0) {
- clk_unprepare(i2c->clk);
+ clk_disable_unprepare(i2c->clk);
return ret;
}
+ /* Disable filtering */
+ meson_i2c_set_mask(i2c, REG_SLAVE_ADDR,
+ REG_SLV_SDA_FILTER | REG_SLV_SCL_FILTER, 0);
+
meson_i2c_set_clk_div(i2c, timings.bus_freq_hz);
return 0;
@@ -471,7 +485,7 @@ static int meson_i2c_remove(struct platform_device *pdev)
struct meson_i2c *i2c = platform_get_drvdata(pdev);
i2c_del_adapter(&i2c->adap);
- clk_unprepare(i2c->clk);
+ clk_disable_unprepare(i2c->clk);
return 0;
}
diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index efc14041d45b..0cbdfbe605b5 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -681,8 +681,8 @@ static int mtk_i2c_calculate_speed(struct mtk_i2c *i2c, unsigned int clk_src,
unsigned int cnt_mul;
int ret = -EINVAL;
- if (target_speed > I2C_MAX_FAST_MODE_PLUS_FREQ)
- target_speed = I2C_MAX_FAST_MODE_PLUS_FREQ;
+ if (target_speed > I2C_MAX_HIGH_SPEED_MODE_FREQ)
+ target_speed = I2C_MAX_HIGH_SPEED_MODE_FREQ;
max_step_cnt = mtk_i2c_max_step_cnt(target_speed);
base_step_cnt = max_step_cnt;
@@ -759,7 +759,7 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
for (clk_div = 1; clk_div <= max_clk_div; clk_div++) {
clk_src = parent_clk / clk_div;
- if (target_speed > I2C_MAX_FAST_MODE_FREQ) {
+ if (target_speed > I2C_MAX_FAST_MODE_PLUS_FREQ) {
/* Set master code speed register */
ret = mtk_i2c_calculate_speed(i2c, clk_src,
I2C_MAX_FAST_MODE_FREQ,
diff --git a/drivers/i2c/busses/i2c-mxs.c b/drivers/i2c/busses/i2c-mxs.c
index 9587347447f0..c4b08a924461 100644
--- a/drivers/i2c/busses/i2c-mxs.c
+++ b/drivers/i2c/busses/i2c-mxs.c
@@ -25,6 +25,7 @@
#include <linux/of_device.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
+#include <linux/dma/mxs-dma.h>
#define DRIVER_NAME "mxs-i2c"
@@ -200,7 +201,8 @@ static int mxs_i2c_dma_setup_xfer(struct i2c_adapter *adap,
dma_map_sg(i2c->dev, &i2c->sg_io[0], 1, DMA_TO_DEVICE);
desc = dmaengine_prep_slave_sg(i2c->dmach, &i2c->sg_io[0], 1,
DMA_MEM_TO_DEV,
- DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+ DMA_PREP_INTERRUPT |
+ MXS_DMA_CTRL_WAIT4END);
if (!desc) {
dev_err(i2c->dev,
"Failed to get DMA data write descriptor.\n");
@@ -228,7 +230,8 @@ static int mxs_i2c_dma_setup_xfer(struct i2c_adapter *adap,
dma_map_sg(i2c->dev, &i2c->sg_io[1], 1, DMA_FROM_DEVICE);
desc = dmaengine_prep_slave_sg(i2c->dmach, &i2c->sg_io[1], 1,
DMA_DEV_TO_MEM,
- DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+ DMA_PREP_INTERRUPT |
+ MXS_DMA_CTRL_WAIT4END);
if (!desc) {
dev_err(i2c->dev,
"Failed to get DMA data write descriptor.\n");
@@ -260,7 +263,8 @@ static int mxs_i2c_dma_setup_xfer(struct i2c_adapter *adap,
dma_map_sg(i2c->dev, i2c->sg_io, 2, DMA_TO_DEVICE);
desc = dmaengine_prep_slave_sg(i2c->dmach, i2c->sg_io, 2,
DMA_MEM_TO_DEV,
- DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+ DMA_PREP_INTERRUPT |
+ MXS_DMA_CTRL_WAIT4END);
if (!desc) {
dev_err(i2c->dev,
"Failed to get DMA data write descriptor.\n");
diff --git a/drivers/i2c/busses/i2c-npcm7xx.c b/drivers/i2c/busses/i2c-npcm7xx.c
index 75f07138a6fa..2ad166355ec9 100644
--- a/drivers/i2c/busses/i2c-npcm7xx.c
+++ b/drivers/i2c/busses/i2c-npcm7xx.c
@@ -2093,8 +2093,12 @@ static int npcm_i2c_master_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
}
}
- /* Adaptive TimeOut: astimated time in usec + 100% margin */
- timeout_usec = (2 * 10000 / bus->bus_freq) * (2 + nread + nwrite);
+ /*
+ * Adaptive TimeOut: estimated time in usec + 100% margin:
+ * 2: double the timeout for clock stretching case
+ * 9: bits per transaction (including the ack/nack)
+ */
+ timeout_usec = (2 * 9 * USEC_PER_SEC / bus->bus_freq) * (2 + nread + nwrite);
timeout = max(msecs_to_jiffies(35), usecs_to_jiffies(timeout_usec));
if (nwrite >= 32 * 1024 || nread >= 32 * 1024) {
dev_err(bus->dev, "i2c%d buffer too big\n", bus->num);
@@ -2159,6 +2163,15 @@ static int npcm_i2c_master_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
if (bus->cmd_err == -EAGAIN)
ret = i2c_recover_bus(adap);
+ /*
+ * After any type of error, check if LAST bit is still set,
+ * due to a HW issue.
+ * It cannot be cleared without resetting the module.
+ */
+ if (bus->cmd_err &&
+ (NPCM_I2CRXF_CTL_LAST_PEC & ioread8(bus->reg + NPCM_I2CRXF_CTL)))
+ npcm_i2c_reset(bus);
+
#if IS_ENABLED(CONFIG_I2C_SLAVE)
/* reenable slave if it was enabled */
if (bus->slave)
diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index 175c590b93b7..12ac4212aded 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -1425,7 +1425,6 @@ omap_i2c_probe(struct platform_device *pdev)
major = OMAP_I2C_REV_SCHEME_0_MAJOR(omap->rev);
break;
case OMAP_I2C_SCHEME_1:
- /* FALLTHROUGH */
default:
omap->regs = (u8 *)reg_map_ip_v2;
rev = (rev << 16) |
diff --git a/drivers/i2c/busses/i2c-opal.c b/drivers/i2c/busses/i2c-opal.c
index 1c4c9bb06a0b..6eb0f50c5d28 100644
--- a/drivers/i2c/busses/i2c-opal.c
+++ b/drivers/i2c/busses/i2c-opal.c
@@ -125,7 +125,7 @@ static int i2c_opal_smbus_xfer(struct i2c_adapter *adap, u16 addr,
case I2C_SMBUS_BYTE:
req.buffer_ra = cpu_to_be64(__pa(&data->byte));
req.size = cpu_to_be32(1);
- /* Fall through */
+ fallthrough;
case I2C_SMBUS_QUICK:
req.type = (read_write == I2C_SMBUS_READ) ?
OPAL_I2C_RAW_READ : OPAL_I2C_RAW_WRITE;
diff --git a/drivers/i2c/busses/i2c-owl.c b/drivers/i2c/busses/i2c-owl.c
index 618d3013d0b6..9918b2a0b909 100644
--- a/drivers/i2c/busses/i2c-owl.c
+++ b/drivers/i2c/busses/i2c-owl.c
@@ -175,6 +175,9 @@ static irqreturn_t owl_i2c_interrupt(int irq, void *_dev)
fifostat = readl(i2c_dev->base + OWL_I2C_REG_FIFOSTAT);
if (fifostat & OWL_I2C_FIFOSTAT_RNB) {
i2c_dev->err = -ENXIO;
+ /* Clear NACK error bit by writing "1" */
+ owl_i2c_update_reg(i2c_dev->base + OWL_I2C_REG_FIFOSTAT,
+ OWL_I2C_FIFOSTAT_RNB, true);
goto stop;
}
@@ -182,6 +185,9 @@ static irqreturn_t owl_i2c_interrupt(int irq, void *_dev)
stat = readl(i2c_dev->base + OWL_I2C_REG_STAT);
if (stat & OWL_I2C_STAT_BEB) {
i2c_dev->err = -EIO;
+ /* Clear BUS error bit by writing "1" */
+ owl_i2c_update_reg(i2c_dev->base + OWL_I2C_REG_STAT,
+ OWL_I2C_STAT_BEB, true);
goto stop;
}
diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c
index 93b872e41546..217def2d7cb4 100644
--- a/drivers/i2c/busses/i2c-rcar.c
+++ b/drivers/i2c/busses/i2c-rcar.c
@@ -592,6 +592,7 @@ static bool rcar_i2c_slave_irq(struct rcar_i2c_priv *priv)
/* master sent stop */
if (ssr_filtered & SSR) {
i2c_slave_event(priv->slave, I2C_SLAVE_STOP, &value);
+ rcar_i2c_write(priv, ICSCR, SIE | SDBS); /* clear our NACK */
rcar_i2c_write(priv, ICSIER, SAR);
rcar_i2c_write(priv, ICSSR, ~SSR & 0xff);
}
diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c
index 2ade99b105b9..e627d7b2790f 100644
--- a/drivers/i2c/i2c-core-acpi.c
+++ b/drivers/i2c/i2c-core-acpi.c
@@ -276,16 +276,6 @@ void i2c_acpi_register_devices(struct i2c_adapter *adap)
dev_warn(&adap->dev, "failed to enumerate I2C slaves\n");
}
-const struct acpi_device_id *
-i2c_acpi_match_device(const struct acpi_device_id *matches,
- struct i2c_client *client)
-{
- if (!(client && matches))
- return NULL;
-
- return acpi_match_device(matches, &client->dev);
-}
-
static const struct acpi_device_id i2c_acpi_force_400khz_device_ids[] = {
/*
* These Silead touchscreen controllers only work at 400KHz, for
diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
index 34a9609f256d..573b5da145d1 100644
--- a/drivers/i2c/i2c-core-base.c
+++ b/drivers/i2c/i2c-core-base.c
@@ -480,7 +480,7 @@ static int i2c_device_probe(struct device *dev)
* or ACPI ID table is supplied for the probing device.
*/
if (!driver->id_table &&
- !i2c_acpi_match_device(dev->driver->acpi_match_table, client) &&
+ !acpi_driver_match_device(dev, dev->driver) &&
!i2c_of_match_device(dev->driver->of_match_table, client)) {
status = -ENODEV;
goto put_sync_adapter;
@@ -1464,8 +1464,8 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
/* create pre-declared device nodes */
of_i2c_register_devices(adap);
- i2c_acpi_register_devices(adap);
i2c_acpi_install_space_handler(adap);
+ i2c_acpi_register_devices(adap);
if (adap->nr < __i2c_first_dynamic_bus_num)
i2c_scan_static_board_info(adap);
diff --git a/drivers/i2c/i2c-core.h b/drivers/i2c/i2c-core.h
index 94ff1693b391..8ce261167a2d 100644
--- a/drivers/i2c/i2c-core.h
+++ b/drivers/i2c/i2c-core.h
@@ -59,20 +59,11 @@ static inline int __i2c_check_suspended(struct i2c_adapter *adap)
}
#ifdef CONFIG_ACPI
-const struct acpi_device_id *
-i2c_acpi_match_device(const struct acpi_device_id *matches,
- struct i2c_client *client);
void i2c_acpi_register_devices(struct i2c_adapter *adap);
int i2c_acpi_get_irq(struct i2c_client *client);
#else /* CONFIG_ACPI */
static inline void i2c_acpi_register_devices(struct i2c_adapter *adap) { }
-static inline const struct acpi_device_id *
-i2c_acpi_match_device(const struct acpi_device_id *matches,
- struct i2c_client *client)
-{
- return NULL;
-}
static inline int i2c_acpi_get_irq(struct i2c_client *client)
{
generated by cgit v1.2.3 (git 2.39.0) at 2025-02-10 11:00:36 +0300