linux-kernel - [PATCH v1 2/6] gpio: dwapb: Read GPIO base from snps,gpio-base property

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Message-Id: <20200608134300.76091-3-andriy.shevchenko@linux.intel.com>
Date:   Mon,  8 Jun 2020 16:42:56 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Serge Semin <fancer.lancer@...il.com>, linux-gpio@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        linux-kernel@...r.kernel.org, Lee Jones <lee.jones@...aro.org>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1 2/6] gpio: dwapb: Read GPIO base from snps,gpio-base property

For backward compatibility with some legacy devices, introduce
a new property snps,gpio-base to read GPIO base. Don't advertise
to discourage users from utilizing it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/gpio/gpio-dwapb.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c
index a7ca72086511..e3d7589434eb 100644
--- a/drivers/gpio/gpio-dwapb.c
+++ b/drivers/gpio/gpio-dwapb.c
@@ -599,7 +599,8 @@ static struct dwapb_platform_data *dwapb_gpio_get_pdata(struct device *dev)
 			pp->ngpio = 32;
 		}
 
-		pp->gpio_base	= -1;
+		if (fwnode_property_read_u32(fwnode, "snps,gpio-base", &pp->gpio_base))
+			pp->gpio_base = -1;
 
 		/*
 		 * Only port A can provide interrupts in all configurations of
-- 
2.27.0.rc2