diff mbox

[v3,1/9] gpio: mvebu: fix regmap_update_bits usage

Message ID 9a098130daa8daeef89fd6c1e80d982699d5c175.1497281623.git-series.gregory.clement@free-electrons.com
State New
Headers show

Commit Message

Gregory CLEMENT June 12, 2017, 3:34 p.m. UTC 
In some place in the driver regmap_update_bits was misused. Indeed the
last argument is not the value of the bit (or group of bits) itself but
the mask value inside the register.

So when setting the bit N, then the value must be BIT(N) and not 1.

CC: Chris Packham <Chris.Packham@alliedtelesis.co.nz>
CC: Ralph Sennhauser <ralph.sennhauser@gmail.com>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Tested-by: Ralph Sennhauser <ralph.sennhauser@gmail.com>
Tested-by: Chris Packham <Chris.Packham@alliedtelesis.co.nz>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
---
 drivers/gpio/gpio-mvebu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

Linus Walleij June 16, 2017, 9:18 a.m. UTC | #1 
On Mon, Jun 12, 2017 at 5:34 PM, Gregory CLEMENT
<gregory.clement@free-electrons.com> wrote:

> In some place in the driver regmap_update_bits was misused. Indeed the
> last argument is not the value of the bit (or group of bits) itself but
> the mask value inside the register.
>
> So when setting the bit N, then the value must be BIT(N) and not 1.
>
> CC: Chris Packham <Chris.Packham@alliedtelesis.co.nz>
> CC: Ralph Sennhauser <ralph.sennhauser@gmail.com>
> Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
> Tested-by: Ralph Sennhauser <ralph.sennhauser@gmail.com>
> Tested-by: Chris Packham <Chris.Packham@alliedtelesis.co.nz>
> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

Already applied this patch, sorry for missing the resend in the series.

Yours,
Linus Walleij
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diff mbox

Patch

diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c
index 4aec8762fdc5..d5939913d310 100644
--- a/drivers/gpio/gpio-mvebu.c
+++ b/drivers/gpio/gpio-mvebu.c
@@ -341,7 +341,7 @@  static int mvebu_gpio_direction_input(struct gpio_chip *chip, unsigned int pin)
 		return ret;
 
 	regmap_update_bits(mvchip->regs, GPIO_IO_CONF_OFF,
-			   BIT(pin), 1);
+			   BIT(pin), BIT(pin));
 
 	return 0;
 }
@@ -503,7 +503,7 @@  static int mvebu_gpio_irq_set_type(struct irq_data *d, unsigned int type)
 	case IRQ_TYPE_EDGE_FALLING:
 	case IRQ_TYPE_LEVEL_LOW:
 		regmap_update_bits(mvchip->regs, GPIO_IN_POL_OFF,
-				   BIT(pin), 1);
+				   BIT(pin), BIT(pin));
 		break;
 	case IRQ_TYPE_EDGE_BOTH: {
 		u32 data_in, in_pol, val;