From: <patrice.chotard@foss.st.com> To: Mark Brown <broonie@kernel.org>, Alexandre Torgue <alexandre.torgue@foss.st.com> Cc: <linux-spi@vger.kernel.org>, <linux-stm32@st-md-mailman.stormreply.com>, <linux-arm-kernel@lists.infradead.org>, <linux-kernel@vger.kernel.org>, <christophe.kerello@foss.st.com>, <patrice.chotard@foss.st.com> Subject: [PATCH 2/3] spi: stm32-qspi: Always check SR_TCF flags in stm32_qspi_wait_cmd() Date: Wed, 11 May 2022 09:46:43 +0200 [thread overview] Message-ID: <20220511074644.558874-3-patrice.chotard@foss.st.com> (raw) In-Reply-To: <20220511074644.558874-1-patrice.chotard@foss.st.com> From: Patrice Chotard <patrice.chotard@foss.st.com> Currently, SR_TCF flag is checked in case there is data, this criteria is not correct. SR_TCF flags is set when programmed number of bytes has been transferred to the memory device ("bytes" comprised command and data send to the SPI device). So even if there is no data, we must check SR_TCF flag. Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com> --- drivers/spi/spi-stm32-qspi.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/drivers/spi/spi-stm32-qspi.c b/drivers/spi/spi-stm32-qspi.c index 12d8bec35bf6..1660ca5bd1c5 100644 --- a/drivers/spi/spi-stm32-qspi.c +++ b/drivers/spi/spi-stm32-qspi.c @@ -305,9 +305,6 @@ static int stm32_qspi_wait_cmd(struct stm32_qspi *qspi, u32 cr, sr; int err = 0; - if (!op->data.nbytes) - goto wait_nobusy; - if ((readl_relaxed(qspi->io_base + QSPI_SR) & SR_TCF) || qspi->fmode == CCR_FMODE_APM) goto out; @@ -328,7 +325,6 @@ static int stm32_qspi_wait_cmd(struct stm32_qspi *qspi, out: /* clear flags */ writel_relaxed(FCR_CTCF | FCR_CTEF, qspi->io_base + QSPI_FCR); -wait_nobusy: if (!err) err = stm32_qspi_wait_nobusy(qspi); -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: <patrice.chotard@foss.st.com> To: Mark Brown <broonie@kernel.org>, Alexandre Torgue <alexandre.torgue@foss.st.com> Cc: <linux-spi@vger.kernel.org>, <linux-stm32@st-md-mailman.stormreply.com>, <linux-arm-kernel@lists.infradead.org>, <linux-kernel@vger.kernel.org>, <christophe.kerello@foss.st.com>, <patrice.chotard@foss.st.com> Subject: [PATCH 2/3] spi: stm32-qspi: Always check SR_TCF flags in stm32_qspi_wait_cmd() Date: Wed, 11 May 2022 09:46:43 +0200 [thread overview] Message-ID: <20220511074644.558874-3-patrice.chotard@foss.st.com> (raw) In-Reply-To: <20220511074644.558874-1-patrice.chotard@foss.st.com> From: Patrice Chotard <patrice.chotard@foss.st.com> Currently, SR_TCF flag is checked in case there is data, this criteria is not correct. SR_TCF flags is set when programmed number of bytes has been transferred to the memory device ("bytes" comprised command and data send to the SPI device). So even if there is no data, we must check SR_TCF flag. Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com> --- drivers/spi/spi-stm32-qspi.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/drivers/spi/spi-stm32-qspi.c b/drivers/spi/spi-stm32-qspi.c index 12d8bec35bf6..1660ca5bd1c5 100644 --- a/drivers/spi/spi-stm32-qspi.c +++ b/drivers/spi/spi-stm32-qspi.c @@ -305,9 +305,6 @@ static int stm32_qspi_wait_cmd(struct stm32_qspi *qspi, u32 cr, sr; int err = 0; - if (!op->data.nbytes) - goto wait_nobusy; - if ((readl_relaxed(qspi->io_base + QSPI_SR) & SR_TCF) || qspi->fmode == CCR_FMODE_APM) goto out; @@ -328,7 +325,6 @@ static int stm32_qspi_wait_cmd(struct stm32_qspi *qspi, out: /* clear flags */ writel_relaxed(FCR_CTCF | FCR_CTEF, qspi->io_base + QSPI_FCR); -wait_nobusy: if (!err) err = stm32_qspi_wait_nobusy(qspi); -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-05-11 7:47 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-05-11 7:46 [PATCH 0/3] spi: stm32-qspi: flags management fixes patrice.chotard 2022-05-11 7:46 ` patrice.chotard 2022-05-11 7:46 ` [PATCH 1/3] spi: stm32-qspi: Fix wait_cmd timeout in APM mode patrice.chotard 2022-05-11 7:46 ` patrice.chotard 2022-05-11 7:46 ` patrice.chotard [this message] 2022-05-11 7:46 ` [PATCH 2/3] spi: stm32-qspi: Always check SR_TCF flags in stm32_qspi_wait_cmd() patrice.chotard 2022-05-11 7:46 ` [PATCH 3/3] spi: stm32-qspi: Remove SR_BUSY bit check before sending command patrice.chotard 2022-05-11 7:46 ` patrice.chotard 2022-05-11 18:49 ` [PATCH 0/3] spi: stm32-qspi: flags management fixes Mark Brown 2022-05-11 18:49 ` Mark Brown
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