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| author | Marek Vasut <marex@denx.de> | 2021-01-04 13:31:14 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2021-01-13 13:19:51 +0100 |
| commit | 970e8eaa08195a26ba99ec0843968cbc7ad8e947 (patch) | |
| tree | 3e26871645d2191871c326ef4548d73e536272cf /drivers/spi/spi-stm32.c | |
| parent | spi: spi-qcom-qspi: Use irq trigger flags from firmware (diff) | |
| download | linux-970e8eaa08195a26ba99ec0843968cbc7ad8e947.tar.xz linux-970e8eaa08195a26ba99ec0843968cbc7ad8e947.zip | |
spi: stm32: Simplify stm32h7_spi_prepare_fthlv()
Simplify stm32h7_spi_prepare_fthlv() function implementation,
no functional change intended.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Alain Volmat <alain.volmat@st.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: Amelie Delaunay <amelie.delaunay@st.com>
Cc: Antonio Borneo <antonio.borneo@st.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Roman Guskov <rguskov@dh-electronics.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-stm32@st-md-mailman.stormreply.com
To: linux-spi@vger.kernel.org
Link: https://lore.kernel.org/r/20210104123114.261596-1-marex@denx.de
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-stm32.c')
| -rw-r--r-- | drivers/spi/spi-stm32.c | 28 |
1 files changed, 4 insertions, 24 deletions
diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c index be0fb169d7a7..db3e305d9ec4 100644 --- a/drivers/spi/spi-stm32.c +++ b/drivers/spi/spi-stm32.c @@ -473,34 +473,14 @@ static int stm32_spi_prepare_mbr(struct stm32_spi *spi, u32 speed_hz, */ static u32 stm32h7_spi_prepare_fthlv(struct stm32_spi *spi, u32 xfer_len) { - u32 fthlv, half_fifo, packet; + u32 packet, bpw; /* data packet should not exceed 1/2 of fifo space */ - half_fifo = (spi->fifo_size / 2); - - /* data_packet should not exceed transfer length */ - if (half_fifo > xfer_len) - packet = xfer_len; - else - packet = half_fifo; - - if (spi->cur_bpw <= 8) - fthlv = packet; - else if (spi->cur_bpw <= 16) - fthlv = packet / 2; - else - fthlv = packet / 4; + packet = clamp(xfer_len, 1U, spi->fifo_size / 2); /* align packet size with data registers access */ - if (spi->cur_bpw > 8) - fthlv += (fthlv % 2) ? 1 : 0; - else - fthlv += (fthlv % 4) ? (4 - (fthlv % 4)) : 0; - - if (!fthlv) - fthlv = 1; - - return fthlv; + bpw = DIV_ROUND_UP(spi->cur_bpw, 8); + return DIV_ROUND_UP(packet, bpw); } /** |