From: Marc Kleine-Budde <mkl@pengutronix.de>
To: Mark Brown <broonie@kernel.org>
Cc: Maxime Ripard <mripard@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
kernel@pengutronix.de, Marc Kleine-Budde <mkl@pengutronix.de>
Subject: [PATCH v2 04/10] spi: spi-sun6i: sun6i_spi_transfer_one(): remove not needed masking of transfer length
Date: Mon, 6 Jul 2020 16:34:37 +0200 [thread overview]
Message-ID: <20200706143443.9855-5-mkl@pengutronix.de> (raw)
In-Reply-To: <20200706143443.9855-1-mkl@pengutronix.de>
In sun6i_spi_transfer_one() the driver ensures that the length of the transfer
is smaller or equal to SUN6I_MAX_XFER_SIZE. This means the masking of the
length to SUN6I_MAX_XFER_SIZE can be skipped when writing the transfer length
into the registers.
This patch removes the useless masking of the transfer length to
SUN6I_MAX_XFER_SIZE.
Acked-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
drivers/spi/spi-sun6i.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)
diff --git a/drivers/spi/spi-sun6i.c b/drivers/spi/spi-sun6i.c
index 955be8921c45..882492774986 100644
--- a/drivers/spi/spi-sun6i.c
+++ b/drivers/spi/spi-sun6i.c
@@ -73,13 +73,10 @@
#define SUN6I_MAX_XFER_SIZE 0xffffff
#define SUN6I_BURST_CNT_REG 0x30
-#define SUN6I_BURST_CNT(cnt) ((cnt) & SUN6I_MAX_XFER_SIZE)
#define SUN6I_XMIT_CNT_REG 0x34
-#define SUN6I_XMIT_CNT(cnt) ((cnt) & SUN6I_MAX_XFER_SIZE)
#define SUN6I_BURST_CTL_CNT_REG 0x38
-#define SUN6I_BURST_CTL_CNT_STC(cnt) ((cnt) & SUN6I_MAX_XFER_SIZE)
#define SUN6I_TXDATA_REG 0x200
#define SUN6I_RXDATA_REG 0x300
@@ -305,10 +302,9 @@ static int sun6i_spi_transfer_one(struct spi_master *master,
tx_len = tfr->len;
/* Setup the counters */
- sun6i_spi_write(sspi, SUN6I_BURST_CNT_REG, SUN6I_BURST_CNT(tfr->len));
- sun6i_spi_write(sspi, SUN6I_XMIT_CNT_REG, SUN6I_XMIT_CNT(tx_len));
- sun6i_spi_write(sspi, SUN6I_BURST_CTL_CNT_REG,
- SUN6I_BURST_CTL_CNT_STC(tx_len));
+ sun6i_spi_write(sspi, SUN6I_BURST_CNT_REG, tfr->len);
+ sun6i_spi_write(sspi, SUN6I_XMIT_CNT_REG, tx_len);
+ sun6i_spi_write(sspi, SUN6I_BURST_CTL_CNT_REG, tx_len);
/* Fill the TX FIFO */
sun6i_spi_fill_fifo(sspi, sspi->fifo_depth);
--
2.27.0
next prev parent reply other threads:[~2020-07-06 14:34 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-06 14:34 [PATCH v2 00/10] spi: spi-sun6i: One fix and some improvements Marc Kleine-Budde
2020-07-06 14:34 ` [PATCH v2 01/10] spi: spi-sun6i: sun6i_spi_transfer_one(): fix setting of clock rate Marc Kleine-Budde
2020-07-06 14:34 ` [PATCH v2 02/10] spi: spi-sun6i: sun6i_spi_transfer_one(): report effectivly used speed_hz of transfer Marc Kleine-Budde
2020-07-06 14:34 ` [PATCH v2 03/10] spi: spi-sun6i: sun6i_spi_transfer_one(): remove useless goto Marc Kleine-Budde
2020-07-06 14:34 ` Marc Kleine-Budde [this message]
2020-07-06 14:34 ` [PATCH v2 05/10] spi: spi-sun6i: sun6i_spi_get_tx_fifo_count: Convert manual shift+mask to FIELD_GET() Marc Kleine-Budde
2020-07-06 14:34 ` [PATCH v2 06/10] spi: spi-sun6i: sun6i_spi_drain_fifo(): introduce sun6i_spi_get_rx_fifo_count() and make use of it Marc Kleine-Budde
2020-07-06 14:34 ` [PATCH v2 07/10] spi: spi-sun6i: sun6i_spi_drain_fifo(): remove not needed length argument Marc Kleine-Budde
2020-07-06 14:34 ` [PATCH v2 08/10] spi: spi-sun6i: sun6i_spi_fill_fifo(): " Marc Kleine-Budde
2020-07-06 14:34 ` [PATCH v2 09/10] spi: spi-sun6i: sun6i_spi_transfer_one(): collate write to Interrupt Control Register Marc Kleine-Budde
2020-07-06 14:34 ` [PATCH v2 10/10] spi: spi-sun6i: sun6i_spi_transfer_one(): enable RF_RDY interrupt only if needed Marc Kleine-Budde
2020-07-06 15:40 ` [PATCH v2 00/10] spi: spi-sun6i: One fix and some improvements Mark Brown
2020-07-06 18:52 ` Mark Brown
2020-07-06 19:02 ` Mark Brown
2020-07-07 14:17 ` Mark Brown
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