[PATCH v1 2/4] gpio: dwapb: Read GPIO base from gpio-base property

From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Serge Semin <Sergey.Semin@baikalelectronics.ru>,
	Lee Jones <lee.jones@linaro.org>,
	linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org
Cc: Hoan Tran <hoan@os.amperecomputing.com>,
	Serge Semin <fancer.lancer@gmail.com>,
	Linus Walleij <linus.walleij@linaro.org>,
	Bartosz Golaszewski <bgolaszewski@baylibre.com>
Subject: [PATCH v1 2/4] gpio: dwapb: Read GPIO base from gpio-base property
Date: Mon, 26 Jul 2021 15:54:34 +0300	[thread overview]
Message-ID: <20210726125436.58685-2-andriy.shevchenko@linux.intel.com> (raw)
In-Reply-To: <20210726125436.58685-1-andriy.shevchenko@linux.intel.com>

For backward compatibility with some legacy devices introduce
a new (*) property gpio-base to read GPIO base. This will allow
further cleanup of the driver.

*) Note, it's not new for GPIO library since mockup driver is
   using it already.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.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 f6ae69d5d644..e3011d4e17b0 100644
--- a/drivers/gpio/gpio-dwapb.c
+++ b/drivers/gpio/gpio-dwapb.c
@@ -581,7 +581,8 @@ static struct dwapb_platform_data *dwapb_gpio_get_pdata(struct device *dev)
 			pp->ngpio = DWAPB_MAX_GPIOS;
 		}
 
-		pp->gpio_base	= -1;
+		if (fwnode_property_read_u32(fwnode, "gpio-base", &pp->gpio_base))
+			pp->gpio_base = -1;
 
 		/*
 		 * Only port A can provide interrupts in all configurations of
-- 
2.30.2

