Merge tag 'at24-4.20-updates-for-wolfram' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux into i2c/for-4.20

AT24 updates for 4.20

Single patch from Wang Xin improving the read/write loop in at24
under high load.

5 files changed, 14 insertions, 12 deletions

diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index 04b60a349d7e..c91e145ef5a5 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -140,6 +140,7 @@
 
 #define SBREG_BAR               0x10
 #define SBREG_SMBCTRL           0xc6000c
+#define SBREG_SMBCTRL_DNV       0xcf000c
 
 /* Host status bits for SMBPCISTS */
 #define SMBPCISTS_INTS          BIT(3)
@@ -1399,7 +1400,11 @@ static void i801_add_tco(struct i801_priv *priv)
         spin_unlock(&p2sb_spinlock);
 
         res = &tco_res[ICH_RES_MEM_OFF];
-        res->start = (resource_size_t)base64_addr + SBREG_SMBCTRL;
+        if (pci_dev->device == PCI_DEVICE_ID_INTEL_DNV_SMBUS)
+                res->start = (resource_size_t)base64_addr + SBREG_SMBCTRL_DNV;
+        else
+                res->start = (resource_size_t)base64_addr + SBREG_SMBCTRL;
+
         res->end = res->start + 3;
         res->flags = IORESOURCE_MEM;
 
diff --git a/drivers/i2c/busses/i2c-imx-lpi2c.c b/drivers/i2c/busses/i2c-imx-lpi2c.c
index 6d975f5221ca..06c4c767af32 100644
--- a/drivers/i2c/busses/i2c-imx-lpi2c.c
+++ b/drivers/i2c/busses/i2c-imx-lpi2c.c
@@ -538,7 +538,6 @@ static const struct i2c_algorithm lpi2c_imx_algo = {
 
 static const struct of_device_id lpi2c_imx_of_match[] = {
         { .compatible = "fsl,imx7ulp-lpi2c" },
-        { .compatible = "fsl,imx8dv-lpi2c" },
         { },
 };
 MODULE_DEVICE_TABLE(of, lpi2c_imx_of_match);
diff --git a/drivers/i2c/busses/i2c-uniphier-f.c b/drivers/i2c/busses/i2c-uniphier-f.c
index 9918bdd81619..a403e8579b65 100644
--- a/drivers/i2c/busses/i2c-uniphier-f.c
+++ b/drivers/i2c/busses/i2c-uniphier-f.c
@@ -401,11 +401,8 @@ static int uniphier_fi2c_master_xfer(struct i2c_adapter *adap,
                 return ret;
 
         for (msg = msgs; msg < emsg; msg++) {
-                /* If next message is read, skip the stop condition */
-                bool stop = !(msg + 1 < emsg && msg[1].flags & I2C_M_RD);
-                /* but, force it if I2C_M_STOP is set */
-                if (msg->flags & I2C_M_STOP)
-                        stop = true;
+                /* Emit STOP if it is the last message or I2C_M_STOP is set. */
+                bool stop = (msg + 1 == emsg) || (msg->flags & I2C_M_STOP);
 
                 ret = uniphier_fi2c_master_xfer_one(adap, msg, stop);
                 if (ret)
diff --git a/drivers/i2c/busses/i2c-uniphier.c b/drivers/i2c/busses/i2c-uniphier.c
index bb181b088291..454f914ae66d 100644
--- a/drivers/i2c/busses/i2c-uniphier.c
+++ b/drivers/i2c/busses/i2c-uniphier.c
@@ -248,11 +248,8 @@ static int uniphier_i2c_master_xfer(struct i2c_adapter *adap,
                 return ret;
 
         for (msg = msgs; msg < emsg; msg++) {
-                /* If next message is read, skip the stop condition */
-                bool stop = !(msg + 1 < emsg && msg[1].flags & I2C_M_RD);
-                /* but, force it if I2C_M_STOP is set */
-                if (msg->flags & I2C_M_STOP)
-                        stop = true;
+                /* Emit STOP if it is the last message or I2C_M_STOP is set. */
+                bool stop = (msg + 1 == emsg) || (msg->flags & I2C_M_STOP);
 
                 ret = uniphier_i2c_master_xfer_one(adap, msg, stop);
                 if (ret)
diff --git a/drivers/i2c/busses/i2c-xiic.c b/drivers/i2c/busses/i2c-xiic.c
index 9a71e50d21f1..0c51c0ffdda9 100644
--- a/drivers/i2c/busses/i2c-xiic.c
+++ b/drivers/i2c/busses/i2c-xiic.c
@@ -532,6 +532,7 @@ static void xiic_start_recv(struct xiic_i2c *i2c)
 {
         u8 rx_watermark;
         struct i2c_msg *msg = i2c->rx_msg = i2c->tx_msg;
+        unsigned long flags;
 
         /* Clear and enable Rx full interrupt. */
         xiic_irq_clr_en(i2c, XIIC_INTR_RX_FULL_MASK | XIIC_INTR_TX_ERROR_MASK);
@@ -547,6 +548,7 @@ static void xiic_start_recv(struct xiic_i2c *i2c)
                 rx_watermark = IIC_RX_FIFO_DEPTH;
         xiic_setreg8(i2c, XIIC_RFD_REG_OFFSET, rx_watermark - 1);
 
+        local_irq_save(flags);
         if (!(msg->flags & I2C_M_NOSTART))
                 /* write the address */
                 xiic_setreg16(i2c, XIIC_DTR_REG_OFFSET,
@@ -556,6 +558,8 @@ static void xiic_start_recv(struct xiic_i2c *i2c)
 
         xiic_setreg16(i2c, XIIC_DTR_REG_OFFSET,
                 msg->len | ((i2c->nmsgs == 1) ? XIIC_TX_DYN_STOP_MASK : 0));
+        local_irq_restore(flags);
+
         if (i2c->nmsgs == 1)
                 /* very last, enable bus not busy as well */
                 xiic_irq_clr_en(i2c, XIIC_INTR_BNB_MASK);