Re: [RFC PATCH v2 05/12] mtd: rawnand: ams-delta: use GPIO API for data read/write

(off-list ancestor, not in this archive)
[RFC PATCH v2] mtd: rawnand: ams-delta: Use GPIO API for data I/O · Janusz Krzysztofik <jmkrzyszt@gmail.com> · 2018-08-06
[RFC PATCH v2 01/12] mtd: rawnand: ams-delta: Assign mtd->dev.parent, not mtd->owner · Janusz Krzysztofik <jmkrzyszt@gmail.com> · 2018-08-06
Re: [RFC PATCH v2 01/12] mtd: rawnand: ams-delta: Assign mtd->dev.parent, not mtd->owner · Marek Vasut <marek.vasut@gmail.com> · 2018-08-06
Re: [RFC PATCH v2 01/12] mtd: rawnand: ams-delta: Assign mtd->dev.parent, not mtd->owner · Janusz Krzysztofik <jmkrzyszt@gmail.com> · 2018-08-07
Re: [RFC PATCH v2 01/12] mtd: rawnand: ams-delta: Assign mtd->dev.parent, not mtd->owner · Boris Brezillon <hidden> · 2018-08-07
[RFC PATCH v2 02/12] mtd: rawnand: ams-delta: Use private structure · Janusz Krzysztofik <jmkrzyszt@gmail.com> · 2018-08-06
Re: [RFC PATCH v2 02/12] mtd: rawnand: ams-delta: Use private structure · Boris Brezillon <hidden> · 2018-08-07
[RFC PATCH v2 05/12] mtd: rawnand: ams-delta: use GPIO API for data read/write · Janusz Krzysztofik <jmkrzyszt@gmail.com> · 2018-08-06
Re: [RFC PATCH v2 05/12] mtd: rawnand: ams-delta: use GPIO API for data read/write · Marek Vasut <marek.vasut@gmail.com> · 2018-08-06
Re: [RFC PATCH v2 05/12] mtd: rawnand: ams-delta: use GPIO API for data read/write · Boris Brezillon <hidden> · 2018-08-07
Re: [RFC PATCH v2 05/12] mtd: rawnand: ams-delta: use GPIO API for data read/write · Janusz Krzysztofik <jmkrzyszt@gmail.com> · 2018-08-07
Re: [RFC PATCH v2 05/12] mtd: rawnand: ams-delta: use GPIO API for data read/write · Linus Walleij <hidden> · 2018-08-10
[RFC PATCH v2 07/12] mtd: rawnand: ams-delta: Set port direction once per transfer · Janusz Krzysztofik <jmkrzyszt@gmail.com> · 2018-08-06
Re: [RFC PATCH v2 07/12] mtd: rawnand: ams-delta: Set port direction once per transfer · Boris Brezillon <hidden> · 2018-08-07
Re: [RFC PATCH v2 07/12] mtd: rawnand: ams-delta: Set port direction once per transfer · Janusz Krzysztofik <jmkrzyszt@gmail.com> · 2018-08-08
Re: [RFC PATCH v2 07/12] mtd: rawnand: ams-delta: Set port direction once per transfer · Miquel Raynal <miquel.raynal@bootlin.com> · 2018-08-08
[RFC PATCH v2 09/12] gpiolib: Identify GPIO descriptor arrays with direct mapping · Janusz Krzysztofik <jmkrzyszt@gmail.com> · 2018-08-06
Re: [RFC PATCH v2 09/12] gpiolib: Identify GPIO descriptor arrays with direct mapping · Linus Walleij <hidden> · 2018-08-06
Re: [RFC PATCH v2 09/12] gpiolib: Identify GPIO descriptor arrays with direct mapping · Janusz Krzysztofik <jmkrzyszt@gmail.com> · 2018-08-07
Re: [RFC PATCH v2 09/12] gpiolib: Identify GPIO descriptor arrays with direct mapping · Boris Brezillon <hidden> · 2018-08-07
Re: [RFC PATCH v2 09/12] gpiolib: Identify GPIO descriptor arrays with direct mapping · Boris Brezillon <hidden> · 2018-08-07
Re: [RFC PATCH v2 09/12] gpiolib: Identify GPIO descriptor arrays with direct mapping · Janusz Krzysztofik <jmkrzyszt@gmail.com> · 2018-08-07
[RFC PATCH v2 10/12] gpiolib: Introduce bitmap get/set array API extension · Janusz Krzysztofik <jmkrzyszt@gmail.com> · 2018-08-06
[RFC PATCH v2 12/12] gpiolib: Add fast processing path to bitmap API functions · Janusz Krzysztofik <jmkrzyszt@gmail.com> · 2018-08-06
Re: [RFC PATCH v2 12/12] gpiolib: Add fast processing path to bitmap API functions · Linus Walleij <hidden> · 2018-08-06
Re: [RFC PATCH v2 12/12] gpiolib: Add fast processing path to bitmap API functions · Janusz Krzysztofik <jmkrzyszt@gmail.com> · 2018-08-07
Re: [RFC PATCH v2 12/12] gpiolib: Add fast processing path to bitmap API functions · Boris Brezillon <hidden> · 2018-08-07
Re: [RFC PATCH v2 12/12] gpiolib: Add fast processing path to bitmap API functions · Linus Walleij <hidden> · 2018-08-10
[RFC PATCH v2 11/12] mtd: rawnand: ams-delta: Use GPIO API bitmap extension · Janusz Krzysztofik <jmkrzyszt@gmail.com> · 2018-08-06
[RFC PATCH v2 08/12] mtd: rawnand: ams-delta: Simplify pointer resolution on read/write · Janusz Krzysztofik <jmkrzyszt@gmail.com> · 2018-08-06
Re: [RFC PATCH v2 08/12] mtd: rawnand: ams-delta: Simplify pointer resolution on read/write · Boris Brezillon <hidden> · 2018-08-07
Re: [RFC PATCH v2 08/12] mtd: rawnand: ams-delta: Simplify pointer resolution on read/write · Janusz Krzysztofik <jmkrzyszt@gmail.com> · 2018-08-07
[RFC PATCH v2 06/12] ARM: OMAP1: ams-delta: drop obsolete NAND resources · Janusz Krzysztofik <jmkrzyszt@gmail.com> · 2018-08-06
[RFC PATCH v2 03/12] ARM: OMAP1: ams-delta: Provide GPIO lookup table for NAND data port · Janusz Krzysztofik <jmkrzyszt@gmail.com> · 2018-08-06
Re: [RFC PATCH v2 03/12] ARM: OMAP1: ams-delta: Provide GPIO lookup table for NAND data port · Boris Brezillon <hidden> · 2018-08-07
Re: [RFC PATCH v2 03/12] ARM: OMAP1: ams-delta: Provide GPIO lookup table for NAND data port · Linus Walleij <hidden> · 2018-08-10
[RFC PATCH v2 04/12] mtd: rawnand: ams-delta: request data port GPIO resource · Janusz Krzysztofik <jmkrzyszt@gmail.com> · 2018-08-06
Re: [RFC PATCH v2 04/12] mtd: rawnand: ams-delta: request data port GPIO resource · Boris Brezillon <hidden> · 2018-08-07
Re: [RFC PATCH v2 04/12] mtd: rawnand: ams-delta: request data port GPIO resource · Linus Walleij <hidden> · 2018-08-10

From: Linus Walleij <hidden>
Date: 2018-08-10 10:26:01
Also in: linux-arm-kernel, linux-gpio, linux-omap, lkml

On Tue, Aug 7, 2018 at 12:29 AM Janusz Krzysztofik [off-list ref] wrote:

Don't readw()/writew() data directly from/to GPIO port which is under
control of gpio-omap driver, use GPIO API instead.

Degrade of performance on Amstrad Delta is completely not acceptable.

The driver should work with any 8+-bit bidirectional GPIO port, not
only OMAP.

Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>

Reviewed-by: Linus Walleij <redacted>

Yours,
Linus Walleij

`h`	back out one level
`j`	next message in thread
`k`	previous message in thread
`l`	drill in
`Esc`	close help / fold thread tree
`?`	toggle this help