From mboxrd@z Thu Jan 1 00:00:00 1970 From: Heiner Kallweit Subject: [PATCH v5 10/10] i2c: meson: improve and simplify interrupt handler Date: Sat, 25 Mar 2017 14:14:08 +0100 Message-ID: <5ffdcebd-1dc7-8263-acf6-38ea02e50b16@gmail.com> References: <645519b8-93e6-57b1-ae8f-7804c6beb9b1@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: Received: from mail-wm0-f66.google.com ([74.125.82.66]:35719 "EHLO mail-wm0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750994AbdCYNOr (ORCPT ); Sat, 25 Mar 2017 09:14:47 -0400 Received: by mail-wm0-f66.google.com with SMTP id z133so2852851wmb.2 for ; Sat, 25 Mar 2017 06:14:45 -0700 (PDT) In-Reply-To: <645519b8-93e6-57b1-ae8f-7804c6beb9b1@gmail.com> Sender: linux-i2c-owner@vger.kernel.org List-Id: linux-i2c@vger.kernel.org To: Wolfram Sang , Jerome Brunet , Kevin Hilman Cc: "linux-i2c@vger.kernel.org" , linux-amlogic@lists.infradead.org The preceding changes in this patch series now allow to simplify the interrupt handler significantly. Signed-off-by: Heiner Kallweit --- v2: - rebased v3: - no changes v4: - no changes v5: - no changes --- drivers/i2c/busses/i2c-meson.c | 40 ++++++++++------------------------------ 1 file changed, 10 insertions(+), 30 deletions(-) diff --git a/drivers/i2c/busses/i2c-meson.c b/drivers/i2c/busses/i2c-meson.c index d3c33ee4..bccebd28 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; -- 2.12.0