From e09b41010ba33a20a87472ee821fa407a5b8da36 Mon Sep 17 00:00:00 2001 From: José Pekkarinen Date: Mon, 11 Apr 2016 10:41:07 +0300 Subject: These changes are the raw update to linux-4.4.6-rt14. Kernel sources are taken from kernel.org, and rt patch from the rt wiki download page. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen --- kernel/drivers/spi/spi-rspi.c | 42 ++++++++++++++++++------------------------ 1 file changed, 18 insertions(+), 24 deletions(-) (limited to 'kernel/drivers/spi/spi-rspi.c') diff --git a/kernel/drivers/spi/spi-rspi.c b/kernel/drivers/spi/spi-rspi.c index f6bac9e77..818843336 100644 --- a/kernel/drivers/spi/spi-rspi.c +++ b/kernel/drivers/spi/spi-rspi.c @@ -383,7 +383,8 @@ static void qspi_update(const struct rspi_data *rspi, u8 mask, u8 val, u8 reg) rspi_write8(rspi, data, reg); } -static int qspi_set_send_trigger(struct rspi_data *rspi, unsigned int len) +static unsigned int qspi_set_send_trigger(struct rspi_data *rspi, + unsigned int len) { unsigned int n; @@ -665,15 +666,12 @@ static bool rspi_can_dma(struct spi_master *master, struct spi_device *spi, static int rspi_dma_check_then_transfer(struct rspi_data *rspi, struct spi_transfer *xfer) { - if (rspi->master->can_dma && __rspi_can_dma(rspi, xfer)) { - /* rx_buf can be NULL on RSPI on SH in TX-only Mode */ - int ret = rspi_dma_transfer(rspi, &xfer->tx_sg, - xfer->rx_buf ? &xfer->rx_sg : NULL); - if (ret != -EAGAIN) - return 0; - } + if (!rspi->master->can_dma || !__rspi_can_dma(rspi, xfer)) + return -EAGAIN; - return -EAGAIN; + /* rx_buf can be NULL on RSPI on SH in TX-only Mode */ + return rspi_dma_transfer(rspi, &xfer->tx_sg, + xfer->rx_buf ? &xfer->rx_sg : NULL); } static int rspi_common_transfer(struct rspi_data *rspi, @@ -724,28 +722,28 @@ static int rspi_rz_transfer_one(struct spi_master *master, return rspi_common_transfer(rspi, xfer); } -static int qspi_trigger_transfer_out_int(struct rspi_data *rspi, const u8 *tx, +static int qspi_trigger_transfer_out_in(struct rspi_data *rspi, const u8 *tx, u8 *rx, unsigned int len) { - int i, n, ret; - int error; + unsigned int i, n; + int ret; while (len > 0) { n = qspi_set_send_trigger(rspi, len); qspi_set_receive_trigger(rspi, len); if (n == QSPI_BUFFER_SIZE) { - error = rspi_wait_for_tx_empty(rspi); - if (error < 0) { + ret = rspi_wait_for_tx_empty(rspi); + if (ret < 0) { dev_err(&rspi->master->dev, "transmit timeout\n"); - return error; + return ret; } for (i = 0; i < n; i++) rspi_write_data(rspi, *tx++); - error = rspi_wait_for_rx_full(rspi); - if (error < 0) { + ret = rspi_wait_for_rx_full(rspi); + if (ret < 0) { dev_err(&rspi->master->dev, "receive timeout\n"); - return error; + return ret; } for (i = 0; i < n; i++) *rx++ = rspi_read_data(rspi); @@ -771,12 +769,8 @@ static int qspi_transfer_out_in(struct rspi_data *rspi, if (ret != -EAGAIN) return ret; - ret = qspi_trigger_transfer_out_int(rspi, xfer->tx_buf, + return qspi_trigger_transfer_out_in(rspi, xfer->tx_buf, xfer->rx_buf, xfer->len); - if (ret < 0) - return ret; - - return 0; } static int qspi_transfer_out(struct rspi_data *rspi, struct spi_transfer *xfer) @@ -1300,7 +1294,7 @@ error1: return ret; } -static struct platform_device_id spi_driver_ids[] = { +static const struct platform_device_id spi_driver_ids[] = { { "rspi", (kernel_ulong_t)&rspi_ops }, { "rspi-rz", (kernel_ulong_t)&rspi_rz_ops }, { "qspi", (kernel_ulong_t)&qspi_ops }, -- cgit 1.2.3-korg