| Message ID | 20180806222918.12644-4-jmkrzyszt@gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | [RFC,v2,01/12] mtd: rawnand: ams-delta: Assign mtd->dev.parent, not mtd->owner | expand |
On Tue, 7 Aug 2018 00:29:09 +0200 Janusz Krzysztofik <jmkrzyszt@gmail.com> wrote: > Data port used by Amstrad Delta NAND driver is actually an OMAP MPUIO > device, already under control of gpio-omap driver. The NAND driver > gets access to the port by ioremapping it and performs read/write > operations. That is done without any proteciton from other users > legally manipulating the port pins over GPIO API. > > The plan is to convert the driver to access the port over GPIO consumer > API. Before that is implemented, the driver can already obtain > exclusive access to the port by requesting an array of its GPIO > descriptors. > > Add respective entries to the NAND GPIO lookup table. > > Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com> Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com> > --- > arch/arm/mach-omap1/board-ams-delta.c | 11 ++++++++++- > 1 file changed, 10 insertions(+), 1 deletion(-) > > diff --git a/arch/arm/mach-omap1/board-ams-delta.c b/arch/arm/mach-omap1/board-ams-delta.c > index eedacdfe9725..16f7bbe47607 100644 > --- a/arch/arm/mach-omap1/board-ams-delta.c > +++ b/arch/arm/mach-omap1/board-ams-delta.c > @@ -337,7 +337,8 @@ static struct platform_device ams_delta_nand_device = { > .resource = ams_delta_nand_resources, > }; > > -#define OMAP_GPIO_LABEL "gpio-0-15" > +#define OMAP_GPIO_LABEL "gpio-0-15" > +#define OMAP_MPUIO_LABEL "mpuio" > > static struct gpiod_lookup_table ams_delta_nand_gpio_table = { > .table = { > @@ -349,6 +350,14 @@ static struct gpiod_lookup_table ams_delta_nand_gpio_table = { > GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_NWE, "nwe", 0), > GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_ALE, "ale", 0), > GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_CLE, "cle", 0), > + GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 0, "data", 0, 0), > + GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 1, "data", 1, 0), > + GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 2, "data", 2, 0), > + GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 3, "data", 3, 0), > + GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 4, "data", 4, 0), > + GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 5, "data", 5, 0), > + GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 6, "data", 6, 0), > + GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 7, "data", 7, 0), > { }, > }, > }; -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Tue, Aug 7, 2018 at 12:29 AM Janusz Krzysztofik <jmkrzyszt@gmail.com> wrote: > Data port used by Amstrad Delta NAND driver is actually an OMAP MPUIO > device, already under control of gpio-omap driver. The NAND driver > gets access to the port by ioremapping it and performs read/write > operations. That is done without any proteciton from other users > legally manipulating the port pins over GPIO API. > > The plan is to convert the driver to access the port over GPIO consumer > API. Before that is implemented, the driver can already obtain > exclusive access to the port by requesting an array of its GPIO > descriptors. > > Add respective entries to the NAND GPIO lookup table. > > Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Yours, Linus Walleij
diff --git a/arch/arm/mach-omap1/board-ams-delta.c b/arch/arm/mach-omap1/board-ams-delta.c index eedacdfe9725..16f7bbe47607 100644 --- a/arch/arm/mach-omap1/board-ams-delta.c +++ b/arch/arm/mach-omap1/board-ams-delta.c @@ -337,7 +337,8 @@ static struct platform_device ams_delta_nand_device = { .resource = ams_delta_nand_resources, }; -#define OMAP_GPIO_LABEL "gpio-0-15" +#define OMAP_GPIO_LABEL "gpio-0-15" +#define OMAP_MPUIO_LABEL "mpuio" static struct gpiod_lookup_table ams_delta_nand_gpio_table = { .table = { @@ -349,6 +350,14 @@ static struct gpiod_lookup_table ams_delta_nand_gpio_table = { GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_NWE, "nwe", 0), GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_ALE, "ale", 0), GPIO_LOOKUP(LATCH2_LABEL, LATCH2_PIN_NAND_CLE, "cle", 0), + GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 0, "data", 0, 0), + GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 1, "data", 1, 0), + GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 2, "data", 2, 0), + GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 3, "data", 3, 0), + GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 4, "data", 4, 0), + GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 5, "data", 5, 0), + GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 6, "data", 6, 0), + GPIO_LOOKUP_IDX(OMAP_MPUIO_LABEL, 7, "data", 7, 0), { }, }, };
Data port used by Amstrad Delta NAND driver is actually an OMAP MPUIO device, already under control of gpio-omap driver. The NAND driver gets access to the port by ioremapping it and performs read/write operations. That is done without any proteciton from other users legally manipulating the port pins over GPIO API. The plan is to convert the driver to access the port over GPIO consumer API. Before that is implemented, the driver can already obtain exclusive access to the port by requesting an array of its GPIO descriptors. Add respective entries to the NAND GPIO lookup table. Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com> --- arch/arm/mach-omap1/board-ams-delta.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-)