From: Heiner Kallweit <hkallweit1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> To: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>, Brian Norris <computersforpeace-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> Cc: "linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" <linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, MTD Maling List <linux-mtd-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org> Subject: [PATCH 1/3] spi: introduce max message size flag in spi_master Date: Sun, 7 Aug 2016 21:47:18 +0200 [thread overview] Message-ID: <6c95366c-7fcc-ef4c-033a-f9f6e152a669@gmail.com> (raw) Recently a maximum transfer size was was introduced in struct spi_master. However there are also spi controllers with a maximum message size, e.g. fsl-espi has a max message size of 64KB. As there are no (known) spi controller with differing size limits for transfer and message, introduce a flag in spi_master to indicate that the max transfer size is also the maximum message size. Signed-off-by: Heiner Kallweit <hkallweit1-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> --- include/linux/spi/spi.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 072cb2a..cadb1de 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -312,6 +312,8 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv) * @flags: other constraints relevant to this driver * @max_transfer_size: function that returns the max transfer size for * a &spi_device; may be %NULL, so the default %SIZE_MAX will be used. + * @max_message_size_flag: indicates that max transfer size is also + * max message size * @io_mutex: mutex for physical bus access * @bus_lock_spinlock: spinlock for SPI bus locking * @bus_lock_mutex: mutex for exclusion of multiple callers @@ -446,6 +448,8 @@ struct spi_master { * the limit may depend on device transfer settings */ size_t (*max_transfer_size)(struct spi_device *spi); + /* flag indicating that max transfer size is also max message size */ + bool max_message_size_flag; /* I/O mutex */ struct mutex io_mutex; -- 2.9.2 -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html
WARNING: multiple messages have this Message-ID (diff)
From: Heiner Kallweit <hkallweit1@gmail.com> To: Mark Brown <broonie@kernel.org>, Brian Norris <computersforpeace@gmail.com> Cc: "linux-spi@vger.kernel.org" <linux-spi@vger.kernel.org>, MTD Maling List <linux-mtd@lists.infradead.org> Subject: [PATCH 1/3] spi: introduce max message size flag in spi_master Date: Sun, 7 Aug 2016 21:47:18 +0200 [thread overview] Message-ID: <6c95366c-7fcc-ef4c-033a-f9f6e152a669@gmail.com> (raw) Recently a maximum transfer size was was introduced in struct spi_master. However there are also spi controllers with a maximum message size, e.g. fsl-espi has a max message size of 64KB. As there are no (known) spi controller with differing size limits for transfer and message, introduce a flag in spi_master to indicate that the max transfer size is also the maximum message size. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> --- include/linux/spi/spi.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 072cb2a..cadb1de 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -312,6 +312,8 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv) * @flags: other constraints relevant to this driver * @max_transfer_size: function that returns the max transfer size for * a &spi_device; may be %NULL, so the default %SIZE_MAX will be used. + * @max_message_size_flag: indicates that max transfer size is also + * max message size * @io_mutex: mutex for physical bus access * @bus_lock_spinlock: spinlock for SPI bus locking * @bus_lock_mutex: mutex for exclusion of multiple callers @@ -446,6 +448,8 @@ struct spi_master { * the limit may depend on device transfer settings */ size_t (*max_transfer_size)(struct spi_device *spi); + /* flag indicating that max transfer size is also max message size */ + bool max_message_size_flag; /* I/O mutex */ struct mutex io_mutex; -- 2.9.2
next reply other threads:[~2016-08-07 19:47 UTC|newest] Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-08-07 19:47 Heiner Kallweit [this message] 2016-08-07 19:47 ` [PATCH 1/3] spi: introduce max message size flag in spi_master Heiner Kallweit [not found] ` <6c95366c-7fcc-ef4c-033a-f9f6e152a669-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 2016-08-16 16:42 ` Mark Brown 2016-08-16 16:42 ` Mark Brown [not found] ` <20160816164204.GV9347-GFdadSzt00ze9xe1eoZjHA@public.gmane.org> 2016-08-17 18:51 ` Heiner Kallweit 2016-08-17 18:51 ` Heiner Kallweit 2016-08-17 19:08 ` [PATCH v2 1/3] spi: introduce max_message_size hook " Heiner Kallweit 2016-08-17 19:08 ` Heiner Kallweit [not found] ` <69c4ce26-7b41-222e-07b2-92818cedd05f-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 2016-08-18 10:17 ` Mark Brown 2016-08-18 10:17 ` Mark Brown 2016-08-18 10:17 ` Applied "spi: introduce max_message_size hook in spi_master" to the spi tree Mark Brown 2016-08-18 10:17 ` Mark Brown 2016-08-17 19:09 ` [PATCH v2 2/3] mtd: m25p80: consider max message size in m25p80_read Heiner Kallweit 2016-08-17 19:09 ` Heiner Kallweit [not found] ` <b65240ff-7e28-5ecb-0670-abfca871246b-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 2016-09-16 19:13 ` Heiner Kallweit 2016-09-16 19:13 ` Heiner Kallweit [not found] ` <a5aad691-fb3b-39a5-943e-43068df74c44-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 2016-10-27 21:23 ` [PATCH RESEND] " Heiner Kallweit 2016-10-27 21:23 ` Heiner Kallweit [not found] ` <e2e4ecfe-b888-f335-57f6-634f5c818252-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 2016-10-28 5:48 ` Heiner Kallweit 2016-10-28 5:48 ` Heiner Kallweit 2016-10-28 5:58 ` [PATCH v2] " Heiner Kallweit 2016-10-28 5:58 ` Heiner Kallweit [not found] ` <0e38d1ed-af5c-160f-e02a-f1433c507d23-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 2016-10-29 17:59 ` Marek Vasut 2016-10-29 17:59 ` Marek Vasut [not found] ` <6f1aed1e-9467-aa94-56cb-5e9435b21ae4-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 2016-10-29 18:09 ` Mark Brown 2016-10-29 18:09 ` Mark Brown 2016-11-29 6:29 ` Heiner Kallweit 2016-11-29 6:29 ` Heiner Kallweit 2016-12-23 15:15 ` [PATCH v2 2/3] " Cyrille Pitchen 2016-12-23 15:15 ` Cyrille Pitchen 2016-12-23 15:33 ` Cyrille Pitchen 2016-12-23 15:33 ` Cyrille Pitchen [not found] ` <2e31fbe7-bbc7-8fed-ccbf-dd9ae4d220e1-AIFe0yeh4nAAvxtiuMwx3w@public.gmane.org> 2016-12-23 18:53 ` Marek Vasut 2016-12-23 18:53 ` Marek Vasut [not found] ` <e7513817-c6d1-948d-19ff-617debfa1399-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 2016-12-23 21:04 ` Michal Suchanek 2016-12-23 21:04 ` Michal Suchanek [not found] ` <CAOMqctTaPoMR=_dEF_j-WU178_i2tOp2sTfZJSDWWkohVxZn8A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2016-12-24 10:20 ` Marek Vasut 2016-12-24 10:20 ` Marek Vasut [not found] ` <1bd5f31a-a32e-12ce-10af-1a17955f5ab6-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 2016-12-24 23:47 ` Heiner Kallweit 2016-12-24 23:47 ` Heiner Kallweit 2016-08-17 19:11 ` [PATCH v2 3/3] spi: fsl-espi: eliminate spi nor flash read loop Heiner Kallweit 2016-08-17 19:11 ` Heiner Kallweit [not found] ` <b66e4ae5-3528-5141-e1fe-90c19ffcb7ac-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 2016-08-18 10:17 ` Applied "spi: fsl-espi: eliminate spi nor flash read loop" to the spi tree Mark Brown 2016-08-18 10:17 ` Mark Brown 2016-10-13 18:50 ` [PATCH v2 RESEND 2/3] mtd: m25p80: consider max message size in m25p80_read Heiner Kallweit 2016-10-13 18:50 ` Heiner Kallweit
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