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spi: stm32: Simplify stm32h7_spi_prepare_fthlv()

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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>
This commit is contained in:
Marek Vasut 2021-01-04 13:31:14 +01:00 committed by Mark Brown
parent eaecba8767
commit 970e8eaa08
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GPG Key ID: 24D68B725D5487D0
1 changed files with 4 additions and 24 deletions
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28
drivers/spi/spi-stm32.c
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@ -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);
}
/**