linux-kernel - [PATCH v6 3/8] mfd: sm501: Use GPIO_LOOKUP

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Date:   Tue, 24 Mar 2020 14:56:48 +0100
From:   Geert Uytterhoeven <geert+renesas@...der.be>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Jonathan Corbet <corbet@....net>,
        Harish Jenny K N <harish_kandiga@...tor.com>,
        Eugeniu Rosca <erosca@...adit-jv.com>
Cc:     Alexander Graf <graf@...zon.com>,
        Peter Maydell <peter.maydell@...aro.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Phil Reid <preid@...ctromag.com.au>,
        Marc Zyngier <marc.zyngier@....com>,
        Christoffer Dall <christoffer.dall@....com>,
        Magnus Damm <magnus.damm@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-gpio@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        qemu-devel@...gnu.org,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Lee Jones <lee.jones@...aro.org>
Subject: [PATCH v6 3/8] mfd: sm501: Use GPIO_LOOKUP_IDX() helper macro

i801_add_mux() fills in the GPIO lookup table by manually populating an
array of gpiod_lookup structures.  Use the existing GPIO_LOOKUP_IDX()
helper macro instead, to relax a dependency on the gpiod_lookup
structure's member names.

Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
Cc: Lee Jones <lee.jones@...aro.org>
---
While this patch is a dependency for "[PATCH v6 4/8] gpiolib: Add
support for GPIO lookup by line name", it can be applied independently.
But an Acked-by would be nice, too.

Cover letter and full series at
https://lore.kernel.org/r/20200324135328.5796-1-geert+renesas@glider.be/

v6:
  - New.
---
 drivers/mfd/sm501.c | 24 ++++++++----------------
 1 file changed, 8 insertions(+), 16 deletions(-)

diff --git a/drivers/mfd/sm501.c b/drivers/mfd/sm501.c
index e49787e6bb93e5c8..ccd62b963952814e 100644
--- a/drivers/mfd/sm501.c
+++ b/drivers/mfd/sm501.c
@@ -1145,22 +1145,14 @@ static int sm501_register_gpio_i2c_instance(struct sm501_devdata *sm,
 		return -ENOMEM;
 
 	lookup->dev_id = "i2c-gpio";
-	if (iic->pin_sda < 32)
-		lookup->table[0].chip_label = "SM501-LOW";
-	else
-		lookup->table[0].chip_label = "SM501-HIGH";
-	lookup->table[0].chip_hwnum = iic->pin_sda % 32;
-	lookup->table[0].con_id = NULL;
-	lookup->table[0].idx = 0;
-	lookup->table[0].flags = GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN;
-	if (iic->pin_scl < 32)
-		lookup->table[1].chip_label = "SM501-LOW";
-	else
-		lookup->table[1].chip_label = "SM501-HIGH";
-	lookup->table[1].chip_hwnum = iic->pin_scl % 32;
-	lookup->table[1].con_id = NULL;
-	lookup->table[1].idx = 1;
-	lookup->table[1].flags = GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN;
+	lookup->table[0] = (struct gpiod_lookup)
+		GPIO_LOOKUP_IDX(iic->pin_sda < 32 ? "SM501-LOW" : "SM501-HIGH",
+				iic->pin_sda % 32, NULL, 0,
+				GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN);
+	lookup->table[1] = (struct gpiod_lookup)
+		GPIO_LOOKUP_IDX(iic->pin_scl < 32 ? "SM501-LOW" : "SM501-HIGH",
+				iic->pin_scl % 32, NULL, 1,
+				GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN);
 	gpiod_add_lookup_table(lookup);
 
 	icd = dev_get_platdata(&pdev->dev);
-- 
2.17.1