92 lines
2.8 KiB
Diff
92 lines
2.8 KiB
Diff
From: Russell King <rmk+kernel@armlinux.org.uk>
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Bcc: linux@mail.armlinux.org.uk
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Subject: [PATCH 1/7] i2c: pxa: consolidate i2c_pxa_*xfer() implementations
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MIME-Version: 1.0
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Content-Disposition: inline
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Content-Transfer-Encoding: 8bit
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Content-Type: text/plain; charset="utf-8"
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Most of i2c_pxa_pio_xfer() and i2c_pxa_xfer() are identical; the only
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differences are that i2c_pxa_pio_xfer() may reset the bus, and they
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use different underlying transfer functions. The retry loop is the
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same. Consolidate these two functions.
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Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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---
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drivers/i2c/busses/i2c-pxa.c | 36 ++++++++++++++++--------------------
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1 file changed, 16 insertions(+), 20 deletions(-)
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--- a/drivers/i2c/busses/i2c-pxa.c
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+++ b/drivers/i2c/busses/i2c-pxa.c
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@@ -1059,18 +1059,20 @@ static int i2c_pxa_do_xfer(struct pxa_i2
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return ret;
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}
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-static int i2c_pxa_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num)
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+static int i2c_pxa_internal_xfer(struct pxa_i2c *i2c,
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+ struct i2c_msg *msgs, int num,
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+ int (*xfer)(struct pxa_i2c *,
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+ struct i2c_msg *, int num))
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{
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- struct pxa_i2c *i2c = adap->algo_data;
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int ret, i;
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- for (i = adap->retries; i >= 0; i--) {
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- ret = i2c_pxa_do_xfer(i2c, msgs, num);
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+ for (i = i2c->adap.retries; i >= 0; i--) {
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+ ret = xfer(i2c, msgs, num);
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if (ret != I2C_RETRY)
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goto out;
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if (i2c_debug)
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- dev_dbg(&adap->dev, "Retrying transmission\n");
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+ dev_dbg(&i2c->adap.dev, "Retrying transmission\n");
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udelay(100);
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}
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i2c_pxa_scream_blue_murder(i2c, "exhausted retries");
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@@ -1080,6 +1082,14 @@ static int i2c_pxa_xfer(struct i2c_adapt
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return ret;
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}
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+static int i2c_pxa_xfer(struct i2c_adapter *adap,
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+ struct i2c_msg msgs[], int num)
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+{
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+ struct pxa_i2c *i2c = adap->algo_data;
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+
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+ return i2c_pxa_internal_xfer(i2c, msgs, num, i2c_pxa_do_xfer);
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+}
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+
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static u32 i2c_pxa_functionality(struct i2c_adapter *adap)
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{
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return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL |
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@@ -1163,7 +1173,6 @@ static int i2c_pxa_pio_xfer(struct i2c_a
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struct i2c_msg msgs[], int num)
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{
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struct pxa_i2c *i2c = adap->algo_data;
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- int ret, i;
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/* If the I2C controller is disabled we need to reset it
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(probably due to a suspend/resume destroying state). We do
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@@ -1172,20 +1181,7 @@ static int i2c_pxa_pio_xfer(struct i2c_a
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if (!(readl(_ICR(i2c)) & ICR_IUE))
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i2c_pxa_reset(i2c);
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- for (i = adap->retries; i >= 0; i--) {
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- ret = i2c_pxa_do_pio_xfer(i2c, msgs, num);
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- if (ret != I2C_RETRY)
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- goto out;
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-
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- if (i2c_debug)
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- dev_dbg(&adap->dev, "Retrying transmission\n");
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- udelay(100);
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- }
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- i2c_pxa_scream_blue_murder(i2c, "exhausted retries");
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- ret = -EREMOTEIO;
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- out:
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- i2c_pxa_set_slave(i2c, ret);
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- return ret;
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+ return i2c_pxa_internal_xfer(i2c, msgs, num, i2c_pxa_do_pio_xfer);
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}
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static const struct i2c_algorithm i2c_pxa_pio_algorithm = {
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