[PATCH 174/182] serial: sc16is7xx: use gpiochip data pointer

[PATCH 174/182] serial: sc16is7xx: use gpiochip data pointer

[Linus Walleij]

This makes the driver use the data pointer added to the gpio_chip
to store a pointer to the state container instead of relying on
container_of().

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
Greg, please ACK this so I can take it through the GPIO tree.
---
 drivers/tty/serial/sc16is7xx.c | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index cc86c348d809..b1eefcd80d05 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -17,7 +17,7 @@
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/device.h>
-#include <linux/gpio.h>
+#include <linux/gpio/driver.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/of.h>
@@ -1083,8 +1083,7 @@ static const struct uart_ops sc16is7xx_ops = {
 static int sc16is7xx_gpio_get(struct gpio_chip *chip, unsigned offset)
 {
 	unsigned int val;
-	struct sc16is7xx_port *s = container_of(chip, struct sc16is7xx_port,
-						gpio);
+	struct sc16is7xx_port *s = gpiochip_get_data(chip);
 	struct uart_port *port = &s->p[0].port;
 
 	val = sc16is7xx_port_read(port, SC16IS7XX_IOSTATE_REG);
@@ -1094,8 +1093,7 @@ static int sc16is7xx_gpio_get(struct gpio_chip *chip, unsigned offset)
 
 static void sc16is7xx_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
 {
-	struct sc16is7xx_port *s = container_of(chip, struct sc16is7xx_port,
-						gpio);
+	struct sc16is7xx_port *s = gpiochip_get_data(chip);
 	struct uart_port *port = &s->p[0].port;
 
 	sc16is7xx_port_update(port, SC16IS7XX_IOSTATE_REG, BIT(offset),
@@ -1105,8 +1103,7 @@ static void sc16is7xx_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
 static int sc16is7xx_gpio_direction_input(struct gpio_chip *chip,
 					  unsigned offset)
 {
-	struct sc16is7xx_port *s = container_of(chip, struct sc16is7xx_port,
-						gpio);
+	struct sc16is7xx_port *s = gpiochip_get_data(chip);
 	struct uart_port *port = &s->p[0].port;
 
 	sc16is7xx_port_update(port, SC16IS7XX_IODIR_REG, BIT(offset), 0);
@@ -1117,8 +1114,7 @@ static int sc16is7xx_gpio_direction_input(struct gpio_chip *chip,
 static int sc16is7xx_gpio_direction_output(struct gpio_chip *chip,
 					   unsigned offset, int val)
 {
-	struct sc16is7xx_port *s = container_of(chip, struct sc16is7xx_port,
-						gpio);
+	struct sc16is7xx_port *s = gpiochip_get_data(chip);
 	struct uart_port *port = &s->p[0].port;
 
 	sc16is7xx_port_update(port, SC16IS7XX_IOSTATE_REG, BIT(offset),
@@ -1189,7 +1185,7 @@ static int sc16is7xx_probe(struct device *dev,
 		s->gpio.base		 = -1;
 		s->gpio.ngpio		 = devtype->nr_gpio;
 		s->gpio.can_sleep	 = 1;
-		ret = gpiochip_add(&s->gpio);
+		ret = gpiochip_add_data(&s->gpio, s);
 		if (ret)
 			goto out_thread;
 	}
-- 
2.4.3

Re: [PATCH 174/182] serial: sc16is7xx: use gpiochip data pointer

[Greg Kroah-Hartman]

On Wed, Dec 09, 2015 at 02:50:25PM +0100, Linus Walleij wrote:
> This makes the driver use the data pointer added to the gpio_chip
> to store a pointer to the state container instead of relying on
> container_of().
> 
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Jiri Slaby <jslaby@suse.com>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> Greg, please ACK this so I can take it through the GPIO tree.

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>