From: Alexandru Ardelean <aardelean@deviqon.com> To: linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, greybus-dev@lists.linaro.org, devel@driverdev.osuosl.org, linux-tegra@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com Cc: broonie@kernel.org, gregkh@linuxfoundation.org, elder@kernel.org, johan@kernel.org, vireshk@kernel.org, rmfrfs@gmail.com, f.fainelli@gmail.com, ldewangan@nvidia.com, thierry.reding@gmail.com, jonathanh@nvidia.com, linux@deviqon.com, Alexandru Ardelean <aardelean@deviqon.com> Subject: [PATCH 10/10] spi: docs: update info about 'delay_usecs' Date: Mon, 8 Mar 2021 16:55:02 +0200 [thread overview] Message-ID: <20210308145502.1075689-11-aardelean@deviqon.com> (raw) In-Reply-To: <20210308145502.1075689-1-aardelean@deviqon.com> The 'delay_usecs' field is no longer present on the spi_transfer struct. This change updates the doc to mention the usage of the (relatively) new 'delay' field. Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com> --- Documentation/spi/spi-summary.rst | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/Documentation/spi/spi-summary.rst b/Documentation/spi/spi-summary.rst index f1daffe10d78..d4239025461d 100644 --- a/Documentation/spi/spi-summary.rst +++ b/Documentation/spi/spi-summary.rst @@ -411,8 +411,11 @@ any more such messages. duplex (one pointer is NULL) transfers; + optionally defining short delays after transfers ... using - the spi_transfer.delay_usecs setting (this delay can be the - only protocol effect, if the buffer length is zero); + the spi_transfer.delay.value setting (this delay can be the + only protocol effect, if the buffer length is zero) ... + when specifying this delay the default spi_transfer.delay.unit + is microseconds, however this can be adjusted to clock cycles + or nanoseconds if needed; + whether the chipselect becomes inactive after a transfer and any delay ... by using the spi_transfer.cs_change flag; -- 2.29.2
WARNING: multiple messages have this Message-ID (diff)
From: Alexandru Ardelean <aardelean@deviqon.com> To: linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, greybus-dev@lists.linaro.org, devel@driverdev.osuosl.org, linux-tegra@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com Cc: thierry.reding@gmail.com, elder@kernel.org, gregkh@linuxfoundation.org, johan@kernel.org, jonathanh@nvidia.com, broonie@kernel.org, ldewangan@nvidia.com, Alexandru Ardelean <aardelean@deviqon.com>, vireshk@kernel.org, f.fainelli@gmail.com, linux@deviqon.com Subject: [PATCH 10/10] spi: docs: update info about 'delay_usecs' Date: Mon, 8 Mar 2021 16:55:02 +0200 [thread overview] Message-ID: <20210308145502.1075689-11-aardelean@deviqon.com> (raw) In-Reply-To: <20210308145502.1075689-1-aardelean@deviqon.com> The 'delay_usecs' field is no longer present on the spi_transfer struct. This change updates the doc to mention the usage of the (relatively) new 'delay' field. Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com> --- Documentation/spi/spi-summary.rst | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/Documentation/spi/spi-summary.rst b/Documentation/spi/spi-summary.rst index f1daffe10d78..d4239025461d 100644 --- a/Documentation/spi/spi-summary.rst +++ b/Documentation/spi/spi-summary.rst @@ -411,8 +411,11 @@ any more such messages. duplex (one pointer is NULL) transfers; + optionally defining short delays after transfers ... using - the spi_transfer.delay_usecs setting (this delay can be the - only protocol effect, if the buffer length is zero); + the spi_transfer.delay.value setting (this delay can be the + only protocol effect, if the buffer length is zero) ... + when specifying this delay the default spi_transfer.delay.unit + is microseconds, however this can be adjusted to clock cycles + or nanoseconds if needed; + whether the chipselect becomes inactive after a transfer and any delay ... by using the spi_transfer.cs_change flag; -- 2.29.2 _______________________________________________ devel mailing list devel@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
next prev parent reply other threads:[~2021-03-08 14:56 UTC|newest] Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-03-08 14:54 [PATCH 00/10] spi: finalize 'delay_usecs' removal/transition Alexandru Ardelean 2021-03-08 14:54 ` Alexandru Ardelean 2021-03-08 14:54 ` [PATCH 01/10] spi: spi-axi-spi-engine: remove usage of delay_usecs Alexandru Ardelean 2021-03-08 14:54 ` Alexandru Ardelean 2021-03-08 16:42 ` Lars-Peter Clausen 2021-03-08 16:42 ` Lars-Peter Clausen 2021-03-10 7:16 ` Alexandru Ardelean 2021-03-10 7:16 ` Alexandru Ardelean 2021-03-10 7:21 ` Lars-Peter Clausen 2021-03-10 7:21 ` Lars-Peter Clausen 2021-03-08 14:54 ` [PATCH 02/10] spi: bcm63xx-spi: don't check 'delay_usecs' field Alexandru Ardelean 2021-03-08 14:54 ` Alexandru Ardelean 2021-03-08 14:54 ` [PATCH 03/10] spi: spi-bcm-qspi: replace 'delay_usecs' with 'delay.value' check Alexandru Ardelean 2021-03-08 14:54 ` Alexandru Ardelean 2021-03-08 14:54 ` [PATCH 04/10] spi: spi-sh: replace 'delay_usecs' with 'delay.value' in pr_debug Alexandru Ardelean 2021-03-08 14:54 ` Alexandru Ardelean 2021-03-08 14:54 ` [PATCH 05/10] spi: spi-tegra20-flash: don't check 'delay_usecs' field for spi transfer Alexandru Ardelean 2021-03-08 14:54 ` Alexandru Ardelean 2021-03-08 14:54 ` [PATCH 06/10] staging: greybus: spilib: use 'spi_delay_to_ns' for getting xfer delay Alexandru Ardelean 2021-03-08 14:54 ` Alexandru Ardelean 2021-03-09 4:28 ` Viresh Kumar 2021-03-09 4:28 ` Viresh Kumar 2021-03-09 9:29 ` Rui Miguel Silva 2021-03-09 9:29 ` Rui Miguel Silva 2021-03-09 13:05 ` Greg KH 2021-03-09 13:05 ` Greg KH 2021-03-08 14:54 ` [PATCH 07/10] spi: spi-falcon: remove check for 'delay_usecs' Alexandru Ardelean 2021-03-08 14:54 ` Alexandru Ardelean 2021-03-08 14:55 ` [PATCH 08/10] spi: fsl-espi: remove usage of 'delay_usecs' field Alexandru Ardelean 2021-03-08 14:55 ` Alexandru Ardelean 2021-03-08 14:55 ` [PATCH 09/10] spi: core: remove 'delay_usecs' field from spi_transfer Alexandru Ardelean 2021-03-08 14:55 ` Alexandru Ardelean 2021-03-08 14:55 ` Alexandru Ardelean [this message] 2021-03-08 14:55 ` [PATCH 10/10] spi: docs: update info about 'delay_usecs' Alexandru Ardelean 2021-03-12 20:25 ` [PATCH 00/10] spi: finalize 'delay_usecs' removal/transition Mark Brown 2021-03-12 20:25 ` Mark Brown
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