diff options
Diffstat (limited to 'target/linux/generic/backport-5.4/815-v5.8-i2c-pxa-consolidate-i2c_pxa_-xfer-implementations.patch')
| -rw-r--r-- | target/linux/generic/backport-5.4/815-v5.8-i2c-pxa-consolidate-i2c_pxa_-xfer-implementations.patch | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.4/815-v5.8-i2c-pxa-consolidate-i2c_pxa_-xfer-implementations.patch b/target/linux/generic/backport-5.4/815-v5.8-i2c-pxa-consolidate-i2c_pxa_-xfer-implementations.patch new file mode 100644 index 0000000000..f66759f48b --- /dev/null +++ b/target/linux/generic/backport-5.4/815-v5.8-i2c-pxa-consolidate-i2c_pxa_-xfer-implementations.patch @@ -0,0 +1,96 @@ +From: Russell King <rmk+kernel@armlinux.org.uk> +Bcc: linux@mail.armlinux.org.uk +Subject: [PATCH 1/7] i2c: pxa: consolidate i2c_pxa_*xfer() implementations +MIME-Version: 1.0 +Content-Disposition: inline +Content-Transfer-Encoding: 8bit +Content-Type: text/plain; charset="utf-8" + +Most of i2c_pxa_pio_xfer() and i2c_pxa_xfer() are identical; the only +differences are that i2c_pxa_pio_xfer() may reset the bus, and they +use different underlying transfer functions. The retry loop is the +same. Consolidate these two functions. + +Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> +--- + drivers/i2c/busses/i2c-pxa.c | 36 ++++++++++++++++-------------------- + 1 file changed, 16 insertions(+), 20 deletions(-) + +diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c +index c1e50c0b9756..46f1cf97d955 100644 +--- a/drivers/i2c/busses/i2c-pxa.c ++++ b/drivers/i2c/busses/i2c-pxa.c +@@ -1102,18 +1102,20 @@ static int i2c_pxa_do_xfer(struct pxa_i2c *i2c, struct i2c_msg *msg, int num) + return ret; + } + +-static int i2c_pxa_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num) ++static int i2c_pxa_internal_xfer(struct pxa_i2c *i2c, ++ struct i2c_msg *msgs, int num, ++ int (*xfer)(struct pxa_i2c *, ++ struct i2c_msg *, int num)) + { +- struct pxa_i2c *i2c = adap->algo_data; + int ret, i; + +- for (i = adap->retries; i >= 0; i--) { +- ret = i2c_pxa_do_xfer(i2c, msgs, num); ++ for (i = i2c->adap.retries; i >= 0; i--) { ++ ret = xfer(i2c, msgs, num); + if (ret != I2C_RETRY) + goto out; + + if (i2c_debug) +- dev_dbg(&adap->dev, "Retrying transmission\n"); ++ dev_dbg(&i2c->adap.dev, "Retrying transmission\n"); + udelay(100); + } + i2c_pxa_scream_blue_murder(i2c, "exhausted retries"); +@@ -1123,6 +1125,14 @@ static int i2c_pxa_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num + return ret; + } + ++static int i2c_pxa_xfer(struct i2c_adapter *adap, ++ struct i2c_msg msgs[], int num) ++{ ++ struct pxa_i2c *i2c = adap->algo_data; ++ ++ return i2c_pxa_internal_xfer(i2c, msgs, num, i2c_pxa_do_xfer); ++} ++ + static u32 i2c_pxa_functionality(struct i2c_adapter *adap) + { + return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL | +@@ -1210,7 +1220,6 @@ static int i2c_pxa_pio_xfer(struct i2c_adapter *adap, + struct i2c_msg msgs[], int num) + { + struct pxa_i2c *i2c = adap->algo_data; +- int ret, i; + + /* If the I2C controller is disabled we need to reset it + (probably due to a suspend/resume destroying state). We do +@@ -1219,20 +1228,7 @@ static int i2c_pxa_pio_xfer(struct i2c_adapter *adap, + if (!(readl(_ICR(i2c)) & ICR_IUE)) + i2c_pxa_reset(i2c); + +- for (i = adap->retries; i >= 0; i--) { +- ret = i2c_pxa_do_pio_xfer(i2c, msgs, num); +- if (ret != I2C_RETRY) +- goto out; +- +- if (i2c_debug) +- dev_dbg(&adap->dev, "Retrying transmission\n"); +- udelay(100); +- } +- i2c_pxa_scream_blue_murder(i2c, "exhausted retries"); +- ret = -EREMOTEIO; +- out: +- i2c_pxa_set_slave(i2c, ret); +- return ret; ++ return i2c_pxa_internal_xfer(i2c, msgs, num, i2c_pxa_do_pio_xfer); + } + + static const struct i2c_algorithm i2c_pxa_pio_algorithm = { +-- +2.20.1 + |