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spi: Fixes for v6.10

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A number of fixes that have built up for SPI, a bunch of driver specific
 ones including an unfortunate revert of an optimisation for the i.MX
 driver which was causing issues with some configurations, plus a couple
 of core fixes for the rarely used octal mode and for a bad interaction
 between multi-CS support and target mode.
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Merge tag 'spi-fix-v6.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi fixes from Mark Brown:
 "A number of fixes that have built up for SPI, a bunch of driver
  specific ones including an unfortunate revert of an optimisation for
  the i.MX driver which was causing issues with some configurations,
  plus a couple of core fixes for the rarely used octal mode and for a
  bad interaction between multi-CS support and target mode"

* tag 'spi-fix-v6.10-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: spi-imx: imx51: revert burst length calculation back to bits_per_word
  spi: Fix SPI slave probe failure
  spi: Fix OCTAL mode support
  spi: stm32: qspi: Clamp stm32_qspi_get_mode() output to CCR_BUSWIDTH_4
  spi: stm32: qspi: Fix dual flash mode sanity test in stm32_qspi_setup()
  spi: cs42l43: Drop cs35l56 SPI speed down to 11MHz
  spi: cs42l43: Correct SPI root clock speed
This commit is contained in:
Linus Torvalds 2024-06-22 13:58:47 -07:00
commit e24638afe2
5 changed files with 23 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/spi/spi-cs42l43.c
View File

@ -26,7 +26,7 @@
#include <linux/units.h>
#define CS42L43_FIFO_SIZE 16
#define CS42L43_SPI_ROOT_HZ (40 * HZ_PER_MHZ)
#define CS42L43_SPI_ROOT_HZ 49152000
#define CS42L43_SPI_MAX_LENGTH 65532
enum cs42l43_spi_cmd {
@ -54,7 +54,7 @@ static const struct software_node ampr = {
static struct spi_board_info ampl_info = {
.modalias = "cs35l56",
.max_speed_hz = 20 * HZ_PER_MHZ,
.max_speed_hz = 11 * HZ_PER_MHZ,
.chip_select = 0,
.mode = SPI_MODE_0,
.swnode = &ampl,
@ -62,7 +62,7 @@ static struct spi_board_info ampl_info = {
static struct spi_board_info ampr_info = {
.modalias = "cs35l56",
.max_speed_hz = 20 * HZ_PER_MHZ,
.max_speed_hz = 11 * HZ_PER_MHZ,
.chip_select = 1,
.mode = SPI_MODE_0,
.swnode = &ampr,

14
drivers/spi/spi-imx.c
View File

@ -660,18 +660,8 @@ static int mx51_ecspi_prepare_transfer(struct spi_imx_data *spi_imx,
ctrl |= (spi_imx->target_burst * 8 - 1)
<< MX51_ECSPI_CTRL_BL_OFFSET;
else {
if (spi_imx->usedma) {
ctrl |= (spi_imx->bits_per_word - 1)
<< MX51_ECSPI_CTRL_BL_OFFSET;
} else {
if (spi_imx->count >= MX51_ECSPI_CTRL_MAX_BURST)
ctrl |= (MX51_ECSPI_CTRL_MAX_BURST * BITS_PER_BYTE - 1)
<< MX51_ECSPI_CTRL_BL_OFFSET;
else
ctrl |= (spi_imx->count / DIV_ROUND_UP(spi_imx->bits_per_word,
BITS_PER_BYTE) * spi_imx->bits_per_word - 1)
<< MX51_ECSPI_CTRL_BL_OFFSET;
}
ctrl |= (spi_imx->bits_per_word - 1)
<< MX51_ECSPI_CTRL_BL_OFFSET;
}
/* set clock speed */

12
drivers/spi/spi-stm32-qspi.c
View File

@ -349,7 +349,7 @@ static int stm32_qspi_wait_poll_status(struct stm32_qspi *qspi)
static int stm32_qspi_get_mode(u8 buswidth)
{
if (buswidth == 4)
if (buswidth >= 4)
return CCR_BUSWIDTH_4;
return buswidth;
@ -653,9 +653,7 @@ static int stm32_qspi_setup(struct spi_device *spi)
return -EINVAL;
mode = spi->mode & (SPI_TX_OCTAL | SPI_RX_OCTAL);
if ((mode == SPI_TX_OCTAL || mode == SPI_RX_OCTAL) ||
((mode == (SPI_TX_OCTAL | SPI_RX_OCTAL)) &&
gpiod_count(qspi->dev, "cs") == -ENOENT)) {
if (mode && gpiod_count(qspi->dev, "cs") == -ENOENT) {
dev_err(qspi->dev, "spi-rx-bus-width\\/spi-tx-bus-width\\/cs-gpios\n");
dev_err(qspi->dev, "configuration not supported\n");
@ -676,10 +674,10 @@ static int stm32_qspi_setup(struct spi_device *spi)
qspi->cr_reg = CR_APMS | 3 << CR_FTHRES_SHIFT | CR_SSHIFT | CR_EN;
/*
* Dual flash mode is only enable in case SPI_TX_OCTAL and SPI_TX_OCTAL
* are both set in spi->mode and "cs-gpios" properties is found in DT
* Dual flash mode is only enable in case SPI_TX_OCTAL or SPI_RX_OCTAL
* is set in spi->mode and "cs-gpios" properties is found in DT
*/
if (mode == (SPI_TX_OCTAL | SPI_RX_OCTAL)) {
if (mode) {
qspi->cr_reg |= CR_DFM;
dev_dbg(qspi->dev, "Dual flash mode enable");
}

16
drivers/spi/spi.c
View File

@ -689,10 +689,12 @@ static int __spi_add_device(struct spi_device *spi)
* Make sure that multiple logical CS doesn't map to the same physical CS.
* For example, spi->chip_select[0] != spi->chip_select[1] and so on.
*/
for (idx = 0; idx < SPI_CS_CNT_MAX; idx++) {
status = spi_dev_check_cs(dev, spi, idx, spi, idx + 1);
if (status)
return status;
if (!spi_controller_is_target(ctlr)) {
for (idx = 0; idx < SPI_CS_CNT_MAX; idx++) {
status = spi_dev_check_cs(dev, spi, idx, spi, idx + 1);
if (status)
return status;
}
}
/* Set the bus ID string */
@ -4156,7 +4158,8 @@ static int __spi_validate(struct spi_device *spi, struct spi_message *message)
return -EINVAL;
if (xfer->tx_nbits != SPI_NBITS_SINGLE &&
xfer->tx_nbits != SPI_NBITS_DUAL &&
xfer->tx_nbits != SPI_NBITS_QUAD)
xfer->tx_nbits != SPI_NBITS_QUAD &&
xfer->tx_nbits != SPI_NBITS_OCTAL)
return -EINVAL;
if ((xfer->tx_nbits == SPI_NBITS_DUAL) &&
!(spi->mode & (SPI_TX_DUAL | SPI_TX_QUAD)))
@ -4171,7 +4174,8 @@ static int __spi_validate(struct spi_device *spi, struct spi_message *message)
return -EINVAL;
if (xfer->rx_nbits != SPI_NBITS_SINGLE &&
xfer->rx_nbits != SPI_NBITS_DUAL &&
xfer->rx_nbits != SPI_NBITS_QUAD)
xfer->rx_nbits != SPI_NBITS_QUAD &&
xfer->rx_nbits != SPI_NBITS_OCTAL)
return -EINVAL;
if ((xfer->rx_nbits == SPI_NBITS_DUAL) &&
!(spi->mode & (SPI_RX_DUAL | SPI_RX_QUAD)))

5
include/linux/spi/spi.h
View File

@ -1085,12 +1085,13 @@ struct spi_transfer {
unsigned dummy_data:1;
unsigned cs_off:1;
unsigned cs_change:1;
unsigned tx_nbits:3;
unsigned rx_nbits:3;
unsigned tx_nbits:4;
unsigned rx_nbits:4;
unsigned timestamped:1;
#define SPI_NBITS_SINGLE 0x01 /* 1-bit transfer */
#define SPI_NBITS_DUAL 0x02 /* 2-bit transfer */
#define SPI_NBITS_QUAD 0x04 /* 4-bit transfer */
#define SPI_NBITS_OCTAL 0x08 /* 8-bit transfer */
u8 bits_per_word;
struct spi_delay delay;
struct spi_delay cs_change_delay;