From: Geert Uytterhoeven <geert+renesas@glider.be> To: Linus Walleij <linus.walleij@linaro.org>, Bartosz Golaszewski <bgolaszewski@baylibre.com>, Jonathan Corbet <corbet@lwn.net>, Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Harish Jenny K N <harish_kandiga@mentor.com>, Eugeniu Rosca <erosca@de.adit-jv.com> Cc: Alexander Graf <graf@amazon.com>, Peter Maydell <peter.maydell@linaro.org>, Paolo Bonzini <pbonzini@redhat.com>, Phil Reid <preid@electromag.com.au>, Marc Zyngier <marc.zyngier@arm.com>, Christoffer Dall <christoffer.dall@arm.com>, Magnus Damm <magnus.damm@gmail.com>, linux-gpio@vger.kernel.org, linux-doc@vger.kernel.org, devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, qemu-devel@nongnu.org, Geert Uytterhoeven <geert+renesas@glider.be> Subject: [PATCH v3 3/7] gpiolib: Add support for GPIO line table lookup Date: Wed, 27 Nov 2019 09:42:49 +0100 [thread overview] Message-ID: <20191127084253.16356-4-geert+renesas@glider.be> (raw) In-Reply-To: <20191127084253.16356-1-geert+renesas@glider.be> Currently GPIOs can only be referred to by GPIO controller and offset in GPIO lookup tables. Add support for looking them up by line name. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> --- If this is rejected, the GPIO Aggregator documentation and code must be updated. v3: - New. --- drivers/gpio/gpiolib.c | 12 ++++++++++++ include/linux/gpio/machine.h | 2 +- 2 files changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index d24a3d79dcfe69ad..cb608512ad6bbded 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -4475,6 +4475,18 @@ static struct gpio_desc *gpiod_find(struct device *dev, const char *con_id, if (p->con_id && (!con_id || strcmp(p->con_id, con_id))) continue; + if (p->chip_hwnum == (u16)-1) { + desc = gpio_name_to_desc(p->chip_label); + if (desc) { + *flags = p->flags; + return desc; + } + + dev_warn(dev, "cannot find GPIO line %s, deferring\n", + p->chip_label); + return ERR_PTR(-EPROBE_DEFER); + } + chip = find_chip_by_name(p->chip_label); if (!chip) { diff --git a/include/linux/gpio/machine.h b/include/linux/gpio/machine.h index 1ebe5be05d5f81fa..84c1c097e55eefaf 100644 --- a/include/linux/gpio/machine.h +++ b/include/linux/gpio/machine.h @@ -31,7 +31,7 @@ enum gpio_lookup_flags { */ struct gpiod_lookup { const char *chip_label; - u16 chip_hwnum; + u16 chip_hwnum; /* if -1, chip_label is named line */ const char *con_id; unsigned int idx; unsigned long flags; -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Geert Uytterhoeven <geert+renesas@glider.be> To: Linus Walleij <linus.walleij@linaro.org>, Bartosz Golaszewski <bgolaszewski@baylibre.com>, Jonathan Corbet <corbet@lwn.net>, Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Harish Jenny K N <harish_kandiga@mentor.com>, Eugeniu Rosca <erosca@de.adit-jv.com> Cc: Peter Maydell <peter.maydell@linaro.org>, qemu-devel@nongnu.org, Geert Uytterhoeven <geert+renesas@glider.be>, linux-doc@vger.kernel.org, Marc Zyngier <marc.zyngier@arm.com>, Magnus Damm <magnus.damm@gmail.com>, Christoffer Dall <christoffer.dall@arm.com>, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, Alexander Graf <graf@amazon.com>, Paolo Bonzini <pbonzini@redhat.com>, Phil Reid <preid@electromag.com.au> Subject: [PATCH v3 3/7] gpiolib: Add support for GPIO line table lookup Date: Wed, 27 Nov 2019 09:42:49 +0100 [thread overview] Message-ID: <20191127084253.16356-4-geert+renesas@glider.be> (raw) In-Reply-To: <20191127084253.16356-1-geert+renesas@glider.be> Currently GPIOs can only be referred to by GPIO controller and offset in GPIO lookup tables. Add support for looking them up by line name. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> --- If this is rejected, the GPIO Aggregator documentation and code must be updated. v3: - New. --- drivers/gpio/gpiolib.c | 12 ++++++++++++ include/linux/gpio/machine.h | 2 +- 2 files changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index d24a3d79dcfe69ad..cb608512ad6bbded 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -4475,6 +4475,18 @@ static struct gpio_desc *gpiod_find(struct device *dev, const char *con_id, if (p->con_id && (!con_id || strcmp(p->con_id, con_id))) continue; + if (p->chip_hwnum == (u16)-1) { + desc = gpio_name_to_desc(p->chip_label); + if (desc) { + *flags = p->flags; + return desc; + } + + dev_warn(dev, "cannot find GPIO line %s, deferring\n", + p->chip_label); + return ERR_PTR(-EPROBE_DEFER); + } + chip = find_chip_by_name(p->chip_label); if (!chip) { diff --git a/include/linux/gpio/machine.h b/include/linux/gpio/machine.h index 1ebe5be05d5f81fa..84c1c097e55eefaf 100644 --- a/include/linux/gpio/machine.h +++ b/include/linux/gpio/machine.h @@ -31,7 +31,7 @@ enum gpio_lookup_flags { */ struct gpiod_lookup { const char *chip_label; - u16 chip_hwnum; + u16 chip_hwnum; /* if -1, chip_label is named line */ const char *con_id; unsigned int idx; unsigned long flags; -- 2.17.1
next prev parent reply other threads:[~2019-11-27 8:43 UTC|newest] Thread overview: 96+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-11-27 8:42 [PATCH v3 0/7] gpio: Add GPIO Aggregator/Repeater Geert Uytterhoeven 2019-11-27 8:42 ` Geert Uytterhoeven 2019-11-27 8:42 ` [PATCH v3 1/7] gpiolib: Add GPIOCHIP_NAME definition Geert Uytterhoeven 2019-11-27 8:42 ` Geert Uytterhoeven 2019-11-28 3:38 ` Ulrich Hecht 2019-11-28 3:38 ` Ulrich Hecht 2019-12-02 21:17 ` Eugeniu Rosca 2019-12-02 21:17 ` Eugeniu Rosca 2019-12-12 10:37 ` Linus Walleij 2019-12-12 10:37 ` Linus Walleij 2019-11-27 8:42 ` [PATCH v3 2/7] gpiolib: Add support for gpiochipN-based table lookup Geert Uytterhoeven 2019-11-27 8:42 ` Geert Uytterhoeven 2019-11-28 3:38 ` Ulrich Hecht 2019-11-28 3:38 ` Ulrich Hecht 2019-12-12 13:20 ` Linus Walleij 2019-12-12 13:20 ` Linus Walleij 2019-12-12 13:33 ` Geert Uytterhoeven 2019-12-12 13:33 ` Geert Uytterhoeven 2019-12-12 14:36 ` Linus Walleij 2019-12-12 14:36 ` Linus Walleij 2019-11-27 8:42 ` Geert Uytterhoeven [this message] 2019-11-27 8:42 ` [PATCH v3 3/7] gpiolib: Add support for GPIO line " Geert Uytterhoeven 2019-11-28 3:39 ` Ulrich Hecht 2019-11-28 3:39 ` Ulrich Hecht 2019-12-12 13:40 ` Linus Walleij 2019-12-12 13:40 ` Linus Walleij 2019-11-27 8:42 ` [PATCH v3 4/7] dt-bindings: gpio: Add gpio-repeater bindings Geert Uytterhoeven 2019-11-27 8:42 ` Geert Uytterhoeven 2019-11-28 3:39 ` Ulrich Hecht 2019-11-28 3:39 ` Ulrich Hecht 2019-12-03 5:51 ` Harish Jenny K N 2019-12-03 5:51 ` Harish Jenny K N 2019-12-05 21:06 ` Rob Herring 2019-12-05 21:06 ` Rob Herring 2019-12-06 9:17 ` Geert Uytterhoeven 2019-12-06 9:17 ` Geert Uytterhoeven 2019-12-06 15:03 ` Rob Herring 2019-12-06 15:03 ` Rob Herring 2020-01-06 8:12 ` Geert Uytterhoeven 2020-01-06 8:12 ` Geert Uytterhoeven 2020-01-07 9:22 ` Harish Jenny K N 2020-01-07 9:22 ` Harish Jenny K N 2020-01-16 5:09 ` Harish Jenny K N 2020-01-16 5:09 ` Harish Jenny K N 2019-11-27 8:42 ` [PATCH v3 5/7] gpio: Add GPIO Aggregator/Repeater driver Geert Uytterhoeven 2019-11-27 8:42 ` Geert Uytterhoeven 2019-11-27 14:15 ` Eugeniu Rosca 2019-11-27 14:15 ` Eugeniu Rosca 2019-11-27 14:33 ` Geert Uytterhoeven 2019-11-27 14:33 ` Geert Uytterhoeven 2019-11-28 3:40 ` Ulrich Hecht 2019-11-28 3:40 ` Ulrich Hecht 2019-12-03 5:42 ` Harish Jenny K N 2019-12-03 5:42 ` Harish Jenny K N 2019-12-03 8:17 ` Geert Uytterhoeven 2019-12-03 8:17 ` Geert Uytterhoeven 2019-12-03 8:51 ` Harish Jenny K N 2019-12-03 8:51 ` Harish Jenny K N 2019-12-03 10:51 ` Eugeniu Rosca 2019-12-03 10:51 ` Eugeniu Rosca 2020-01-09 13:35 ` Geert Uytterhoeven 2020-01-09 13:35 ` Geert Uytterhoeven 2020-01-09 13:49 ` Eugeniu Rosca 2020-01-09 13:49 ` Eugeniu Rosca 2019-12-12 14:34 ` Linus Walleij 2019-12-12 14:34 ` Linus Walleij 2019-12-12 15:24 ` Geert Uytterhoeven 2019-12-12 15:24 ` Geert Uytterhoeven 2020-01-04 0:38 ` Linus Walleij 2020-01-04 0:38 ` Linus Walleij 2020-01-06 8:23 ` Geert Uytterhoeven 2020-01-06 8:23 ` Geert Uytterhoeven 2020-01-08 23:12 ` Linus Walleij 2020-01-08 23:12 ` Linus Walleij 2019-11-27 8:42 ` [PATCH v3 6/7] docs: gpio: Add GPIO Aggregator/Repeater documentation Geert Uytterhoeven 2019-11-27 8:42 ` Geert Uytterhoeven 2019-11-28 3:41 ` Ulrich Hecht 2019-11-28 3:41 ` Ulrich Hecht 2019-12-12 14:42 ` Linus Walleij 2019-12-12 14:42 ` Linus Walleij 2019-12-12 14:48 ` Geert Uytterhoeven 2019-12-12 14:48 ` Geert Uytterhoeven 2020-01-04 0:21 ` Linus Walleij 2020-01-04 0:21 ` Linus Walleij 2020-01-06 8:06 ` Geert Uytterhoeven 2020-01-06 8:06 ` Geert Uytterhoeven 2019-11-27 8:42 ` [PATCH v3 7/7] MAINTAINERS: Add GPIO Aggregator/Repeater section Geert Uytterhoeven 2019-11-27 8:42 ` Geert Uytterhoeven 2019-12-03 5:38 ` Harish Jenny K N 2019-12-03 5:38 ` Harish Jenny K N 2020-01-18 1:46 ` [PATCH v3 0/7] gpio: Add GPIO Aggregator/Repeater Eugeniu Rosca 2020-01-18 1:46 ` Eugeniu Rosca 2020-01-20 9:33 ` Geert Uytterhoeven 2020-01-20 9:33 ` Geert Uytterhoeven 2020-01-20 12:14 ` Eugeniu Rosca 2020-01-20 12:14 ` Eugeniu Rosca
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