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| author | Russell King <rmk+kernel@armlinux.org.uk> | 2020-05-11 23:10:27 +0200 |
|---|---|---|
| committer | Wolfram Sang <wsa@kernel.org> | 2020-05-12 12:32:20 +0200 |
| commit | 0f03c08892ac3c42d93662c8dec86bf74e5d4c9b (patch) | |
| tree | 0123d3c13192c0f96edebad071ef2384acfd1cce /drivers/i2c/busses | |
| parent | i2c: mux: pca954x: Convert license to SPDX identifier (diff) | |
| download | linux-0f03c08892ac3c42d93662c8dec86bf74e5d4c9b.tar.xz linux-0f03c08892ac3c42d93662c8dec86bf74e5d4c9b.zip | |
i2c: pxa: consolidate i2c_pxa_*xfer() implementations
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>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Diffstat (limited to 'drivers/i2c/busses')
| -rw-r--r-- | drivers/i2c/busses/i2c-pxa.c | 36 |
1 files 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 = { |