diff options
Diffstat (limited to 'target/linux/ath79/patches-5.10/403-v5.17-spi-ar934x-fix-transfer-size.patch')
| -rw-r--r-- | target/linux/ath79/patches-5.10/403-v5.17-spi-ar934x-fix-transfer-size.patch | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/target/linux/ath79/patches-5.10/403-v5.17-spi-ar934x-fix-transfer-size.patch b/target/linux/ath79/patches-5.10/403-v5.17-spi-ar934x-fix-transfer-size.patch new file mode 100644 index 0000000000..87f5da2c60 --- /dev/null +++ b/target/linux/ath79/patches-5.10/403-v5.17-spi-ar934x-fix-transfer-size.patch @@ -0,0 +1,62 @@ +From ebe33e5a98dcf14a9630845f3f10c193584ac054 Mon Sep 17 00:00:00 2001 +From: Oskari Lemmela <oskari@lemmela.net> +Date: Wed, 22 Dec 2021 07:59:57 +0200 +Subject: [PATCH] spi: ar934x: fix transfer size + +If bits_per_word is configured, transfer only word amount +of data per iteration. + +Signed-off-by: Oskari Lemmela <oskari@lemmela.net> +Link: https://lore.kernel.org/r/20211222055958.1383233-2-oskari@lemmela.net +Signed-off-by: Mark Brown <broonie@kernel.org> +--- + drivers/spi/spi-ar934x.c | 16 +++++++++++----- + 1 file changed, 11 insertions(+), 5 deletions(-) + +--- a/drivers/spi/spi-ar934x.c ++++ b/drivers/spi/spi-ar934x.c +@@ -82,7 +82,7 @@ static int ar934x_spi_transfer_one_messa + struct spi_device *spi = m->spi; + unsigned long trx_done, trx_cur; + int stat = 0; +- u8 term = 0; ++ u8 bpw, term = 0; + int div, i; + u32 reg; + const u8 *tx_buf; +@@ -90,6 +90,11 @@ static int ar934x_spi_transfer_one_messa + + m->actual_length = 0; + list_for_each_entry(t, &m->transfers, transfer_list) { ++ if (t->bits_per_word >= 8 && t->bits_per_word < 32) ++ bpw = t->bits_per_word >> 3; ++ else ++ bpw = 4; ++ + if (t->speed_hz) + div = ar934x_spi_clk_div(sp, t->speed_hz); + else +@@ -105,10 +110,10 @@ static int ar934x_spi_transfer_one_messa + iowrite32(reg, sp->base + AR934X_SPI_REG_CTRL); + iowrite32(0, sp->base + AR934X_SPI_DATAOUT); + +- for (trx_done = 0; trx_done < t->len; trx_done += 4) { ++ for (trx_done = 0; trx_done < t->len; trx_done += bpw) { + trx_cur = t->len - trx_done; +- if (trx_cur > 4) +- trx_cur = 4; ++ if (trx_cur > bpw) ++ trx_cur = bpw; + else if (list_is_last(&t->transfer_list, &m->transfers)) + term = 1; + +@@ -193,7 +198,8 @@ static int ar934x_spi_probe(struct platf + ctlr->mode_bits = SPI_LSB_FIRST; + ctlr->setup = ar934x_spi_setup; + ctlr->transfer_one_message = ar934x_spi_transfer_one_message; +- ctlr->bits_per_word_mask = SPI_BPW_MASK(8); ++ ctlr->bits_per_word_mask = SPI_BPW_MASK(32) | SPI_BPW_MASK(24) | ++ SPI_BPW_MASK(16) | SPI_BPW_MASK(8); + ctlr->dev.of_node = pdev->dev.of_node; + ctlr->num_chipselect = 3; + |