From 4dba406fac06b009873fe7a28231b9b7e4288b09 Mon Sep 17 00:00:00 2001 From: Stefan Wahren Date: Fri, 6 Dec 2024 19:46:42 +0100 Subject: [PATCH 1/2] qca_spi: Fix clock speed for multiple QCA7000 Storing the maximum clock speed in module parameter qcaspi_clkspeed has the unintended side effect that the first probed instance defines the value for all other instances. Fix this issue by storing it in max_speed_hz of the relevant SPI device. This fix keeps the priority of the speed parameter (module parameter, device tree property, driver default). Btw this uses the opportunity to get the rid of the unused member clkspeed. Fixes: 291ab06ecf67 ("net: qualcomm: new Ethernet over SPI driver for QCA7000") Signed-off-by: Stefan Wahren Link: https://patch.msgid.link/20241206184643.123399-2-wahrenst@gmx.net Signed-off-by: Jakub Kicinski --- drivers/net/ethernet/qualcomm/qca_spi.c | 24 ++++++++++-------------- drivers/net/ethernet/qualcomm/qca_spi.h | 1 - 2 files changed, 10 insertions(+), 15 deletions(-) diff --git a/drivers/net/ethernet/qualcomm/qca_spi.c b/drivers/net/ethernet/qualcomm/qca_spi.c index ef9c02b000e4..d328e770bcbe 100644 --- a/drivers/net/ethernet/qualcomm/qca_spi.c +++ b/drivers/net/ethernet/qualcomm/qca_spi.c @@ -818,7 +818,6 @@ qcaspi_netdev_init(struct net_device *dev) dev->mtu = QCAFRM_MAX_MTU; dev->type = ARPHRD_ETHER; - qca->clkspeed = qcaspi_clkspeed; qca->burst_len = qcaspi_burst_len; qca->spi_thread = NULL; qca->buffer_size = (QCAFRM_MAX_MTU + VLAN_ETH_HLEN + QCAFRM_HEADER_LEN + @@ -909,17 +908,15 @@ qca_spi_probe(struct spi_device *spi) legacy_mode = of_property_read_bool(spi->dev.of_node, "qca,legacy-mode"); - if (qcaspi_clkspeed == 0) { - if (spi->max_speed_hz) - qcaspi_clkspeed = spi->max_speed_hz; - else - qcaspi_clkspeed = QCASPI_CLK_SPEED; - } + if (qcaspi_clkspeed) + spi->max_speed_hz = qcaspi_clkspeed; + else if (!spi->max_speed_hz) + spi->max_speed_hz = QCASPI_CLK_SPEED; - if ((qcaspi_clkspeed < QCASPI_CLK_SPEED_MIN) || - (qcaspi_clkspeed > QCASPI_CLK_SPEED_MAX)) { - dev_err(&spi->dev, "Invalid clkspeed: %d\n", - qcaspi_clkspeed); + if (spi->max_speed_hz < QCASPI_CLK_SPEED_MIN || + spi->max_speed_hz > QCASPI_CLK_SPEED_MAX) { + dev_err(&spi->dev, "Invalid clkspeed: %u\n", + spi->max_speed_hz); return -EINVAL; } @@ -944,14 +941,13 @@ qca_spi_probe(struct spi_device *spi) return -EINVAL; } - dev_info(&spi->dev, "ver=%s, clkspeed=%d, burst_len=%d, pluggable=%d\n", + dev_info(&spi->dev, "ver=%s, clkspeed=%u, burst_len=%d, pluggable=%d\n", QCASPI_DRV_VERSION, - qcaspi_clkspeed, + spi->max_speed_hz, qcaspi_burst_len, qcaspi_pluggable); spi->mode = SPI_MODE_3; - spi->max_speed_hz = qcaspi_clkspeed; if (spi_setup(spi) < 0) { dev_err(&spi->dev, "Unable to setup SPI device\n"); return -EFAULT; diff --git a/drivers/net/ethernet/qualcomm/qca_spi.h b/drivers/net/ethernet/qualcomm/qca_spi.h index 7ba5c9e2f61c..90b290f94c27 100644 --- a/drivers/net/ethernet/qualcomm/qca_spi.h +++ b/drivers/net/ethernet/qualcomm/qca_spi.h @@ -89,7 +89,6 @@ struct qcaspi { #endif /* user configurable options */ - u32 clkspeed; u8 legacy_mode; u16 burst_len; }; From becc6399ce3b724cffe9ccb7ef0bff440bb1b62b Mon Sep 17 00:00:00 2001 From: Stefan Wahren Date: Fri, 6 Dec 2024 19:46:43 +0100 Subject: [PATCH 2/2] qca_spi: Make driver probing reliable The module parameter qcaspi_pluggable controls if QCA7000 signature should be checked at driver probe (current default) or not. Unfortunately this could fail in case the chip is temporary in reset, which isn't under total control by the Linux host. So disable this check per default in order to avoid unexpected probe failures. Fixes: 291ab06ecf67 ("net: qualcomm: new Ethernet over SPI driver for QCA7000") Signed-off-by: Stefan Wahren Link: https://patch.msgid.link/20241206184643.123399-3-wahrenst@gmx.net Signed-off-by: Jakub Kicinski --- drivers/net/ethernet/qualcomm/qca_spi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/qualcomm/qca_spi.c b/drivers/net/ethernet/qualcomm/qca_spi.c index d328e770bcbe..38a779f4b866 100644 --- a/drivers/net/ethernet/qualcomm/qca_spi.c +++ b/drivers/net/ethernet/qualcomm/qca_spi.c @@ -54,7 +54,7 @@ MODULE_PARM_DESC(qcaspi_burst_len, "Number of data bytes per burst. Use 1-5000." #define QCASPI_PLUGGABLE_MIN 0 #define QCASPI_PLUGGABLE_MAX 1 -static int qcaspi_pluggable = QCASPI_PLUGGABLE_MIN; +static int qcaspi_pluggable = QCASPI_PLUGGABLE_MAX; module_param(qcaspi_pluggable, int, 0); MODULE_PARM_DESC(qcaspi_pluggable, "Pluggable SPI connection (yes/no).");