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authorJacopo Mondi <jacopo+renesas@jmondi.org>2020-11-20 17:15:28 +0100
committerMauro Carvalho Chehab <mchehab+huawei@kernel.org>2020-12-02 16:14:27 +0100
commit909a0a189c677307edd461e21fd962784370d27f (patch)
tree1f51ccf42f782652f15bf7d7fc21bb1e7ef85980 /drivers/media/i2c/max9271.c
parent0ae426ebd0dcef811a012b33345e6f7ca56256f4 (diff)
media: max9271: Fix GPIO enable/disable
Fix GPIO enable/disable operations which wrongly read the 0x0f register to obtain the current mask of the enabled lines instead of using the correct 0x0e register. Also fix access to bit 0 of the register which is marked as reserved. Fixes: 34009bffc1c6 ("media: i2c: Add RDACM20 driver") Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/media/i2c/max9271.c')
-rw-r--r--drivers/media/i2c/max9271.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/media/i2c/max9271.c b/drivers/media/i2c/max9271.c
index 0f6f7a092a46..c247db569bab 100644
--- a/drivers/media/i2c/max9271.c
+++ b/drivers/media/i2c/max9271.c
@@ -223,12 +223,12 @@ int max9271_enable_gpios(struct max9271_device *dev, u8 gpio_mask)
{
int ret;
- ret = max9271_read(dev, 0x0f);
+ ret = max9271_read(dev, 0x0e);
if (ret < 0)
return 0;
/* BIT(0) reserved: GPO is always enabled. */
- ret |= gpio_mask | BIT(0);
+ ret |= (gpio_mask & ~BIT(0));
ret = max9271_write(dev, 0x0e, ret);
if (ret < 0) {
dev_err(&dev->client->dev, "Failed to enable gpio (%d)\n", ret);
@@ -245,12 +245,12 @@ int max9271_disable_gpios(struct max9271_device *dev, u8 gpio_mask)
{
int ret;
- ret = max9271_read(dev, 0x0f);
+ ret = max9271_read(dev, 0x0e);
if (ret < 0)
return 0;
/* BIT(0) reserved: GPO cannot be disabled */
- ret &= (~gpio_mask | BIT(0));
+ ret &= ~(gpio_mask | BIT(0));
ret = max9271_write(dev, 0x0e, ret);
if (ret < 0) {
dev_err(&dev->client->dev, "Failed to disable gpio (%d)\n", ret);