From: Samuel Iglesias Gonsalvez Date: Mon, 10 Dec 2012 10:50:02 +0000 (+0100) Subject: ipack/devices/ipoctal: rework disable TX when the TX buffer is empty X-Git-Tag: upstream/snapshot3+hdmi~5693^2~120 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9d01b6f064c130028be8beb729ada7c39021b582;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git ipack/devices/ipoctal: rework disable TX when the TX buffer is empty Depending of the device, it disables the TX mode in different places when there is no more data to transmit. This patch reorder them and disable the TX mode in the same place. Signed-off-by: Samuel Iglesias Gonsalvez Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c index 850f105..f2875f0 100644 --- a/drivers/ipack/devices/ipoctal.c +++ b/drivers/ipack/devices/ipoctal.c @@ -177,10 +177,6 @@ static void ipoctal_irq_tx(struct ipoctal_channel *channel) (*pointer_write)++; *pointer_write = *pointer_write % PAGE_SIZE; channel->nb_bytes--; - - if (channel->nb_bytes == 0 && - channel->board_id != IPACK1_DEVICE_ID_SBS_OCTAL_485) - iowrite8(CR_DISABLE_TX, &channel->regs->w.cr); } static void ipoctal_irq_channel(struct ipoctal_channel *channel) @@ -196,14 +192,14 @@ static void ipoctal_irq_channel(struct ipoctal_channel *channel) isr = ioread8(&channel->block_regs->r.isr); sr = ioread8(&channel->regs->r.sr); - /* In case of RS-485, change from TX to RX when finishing TX. - * Half-duplex. */ - if ((channel->board_id == IPACK1_DEVICE_ID_SBS_OCTAL_485) && - (sr & SR_TX_EMPTY) && (channel->nb_bytes == 0)) { - iowrite8(CR_DISABLE_TX, &channel->regs->w.cr); - iowrite8(CR_CMD_NEGATE_RTSN, &channel->regs->w.cr); - iowrite8(CR_ENABLE_RX, &channel->regs->w.cr); + if ((sr & SR_TX_EMPTY) && (channel->nb_bytes == 0)) { iowrite8(CR_DISABLE_TX, &channel->regs->w.cr); + /* In case of RS-485, change from TX to RX when finishing TX. + * Half-duplex. */ + if (channel->board_id == IPACK1_DEVICE_ID_SBS_OCTAL_485) { + iowrite8(CR_CMD_NEGATE_RTSN, &channel->regs->w.cr); + iowrite8(CR_ENABLE_RX, &channel->regs->w.cr); + } } /* RX data */