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authorHeiner Kallweit <hkallweit1@gmail.com>2017-03-25 14:14:08 +0100
committerWolfram Sang <wsa@the-dreams.de>2017-03-30 17:31:29 +0200
commitcda816d163e08abb698f10ec32aa2d173ad93e7f (patch)
tree03b9791ebb63b422b68f419baa8bffe142a2a24a /drivers
parent3911764cfbe7f5d229498d818aa2eff6e5611da8 (diff)
downloadlinux-cda816d163e08abb698f10ec32aa2d173ad93e7f.tar.bz2
i2c: meson: improve and simplify interrupt handler
The preceding changes in this patch series now allow to simplify the interrupt handler significantly. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/i2c/busses/i2c-meson.c40
1 files changed, 10 insertions, 30 deletions
diff --git a/drivers/i2c/busses/i2c-meson.c b/drivers/i2c/busses/i2c-meson.c
index be9f83bd92fc..88d15b92ec35 100644
--- a/drivers/i2c/busses/i2c-meson.c
+++ b/drivers/i2c/busses/i2c-meson.c
@@ -242,41 +242,21 @@ static irqreturn_t meson_i2c_irq(int irqno, void *dev_id)
goto out;
}
- switch (i2c->state) {
- case STATE_READ:
- if (i2c->count > 0) {
- meson_i2c_get_data(i2c, i2c->msg->buf + i2c->pos,
- i2c->count);
- i2c->pos += i2c->count;
- }
-
- if (i2c->pos >= i2c->msg->len) {
- i2c->state = STATE_IDLE;
- complete(&i2c->done);
- break;
- }
-
- meson_i2c_prepare_xfer(i2c);
- break;
- case STATE_WRITE:
- i2c->pos += i2c->count;
+ if (i2c->state == STATE_READ && i2c->count)
+ meson_i2c_get_data(i2c, i2c->msg->buf + i2c->pos, i2c->count);
- if (i2c->pos >= i2c->msg->len) {
- i2c->state = STATE_IDLE;
- complete(&i2c->done);
- break;
- }
+ i2c->pos += i2c->count;
- meson_i2c_prepare_xfer(i2c);
- break;
+ if (i2c->pos >= i2c->msg->len) {
+ i2c->state = STATE_IDLE;
+ complete(&i2c->done);
+ goto out;
}
+ /* Restart the processing */
+ meson_i2c_prepare_xfer(i2c);
+ meson_i2c_set_mask(i2c, REG_CTRL, REG_CTRL_START, REG_CTRL_START);
out:
- if (i2c->state != STATE_IDLE)
- /* Restart the processing */
- meson_i2c_set_mask(i2c, REG_CTRL, REG_CTRL_START,
- REG_CTRL_START);
-
spin_unlock(&i2c->lock);
return IRQ_HANDLED;