[PATCH] hwmon: (pmbus/ibm-cffps) Fix write bits for LED control

[PATCH] hwmon: (pmbus/ibm-cffps) Fix write bits for LED control

[Brandon Wyman]

From: "B. J. Wyman" <bjwyman@gmail.com>

When doing a PMBus write for the LED control on the IBM Common Form
Factor Power Supplies (ibm-cffps), the DAh command requires that bit 7
be low and bit 6 be high in order to indicate that you are truly
attempting to do a write.

Signed-off-by: B. J. Wyman <bjwyman@gmail.com>
---
 drivers/hwmon/pmbus/ibm-cffps.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/hwmon/pmbus/ibm-cffps.c b/drivers/hwmon/pmbus/ibm-cffps.c
index 5668d8305b78..df712ce4b164 100644
--- a/drivers/hwmon/pmbus/ibm-cffps.c
+++ b/drivers/hwmon/pmbus/ibm-cffps.c
@@ -50,9 +50,9 @@
 #define CFFPS_MFR_VAUX_FAULT			BIT(6)
 #define CFFPS_MFR_CURRENT_SHARE_WARNING		BIT(7)
 
-#define CFFPS_LED_BLINK				BIT(0)
-#define CFFPS_LED_ON				BIT(1)
-#define CFFPS_LED_OFF				BIT(2)
+#define CFFPS_LED_BLINK				(BIT(0) | BIT(6))
+#define CFFPS_LED_ON				(BIT(1) | BIT(6))
+#define CFFPS_LED_OFF				(BIT(2) | BIT(6))
 #define CFFPS_BLINK_RATE_MS			250
 
 enum {
-- 
2.25.1

Re: [PATCH] hwmon: (pmbus/ibm-cffps) Fix write bits for LED control

[Guenter Roeck]

On 7/28/21 3:41 PM, Brandon Wyman wrote:
> From: "B. J. Wyman" <bjwyman@gmail.com>
> 
> When doing a PMBus write for the LED control on the IBM Common Form
> Factor Power Supplies (ibm-cffps), the DAh command requires that bit 7
> be low and bit 6 be high in order to indicate that you are truly
> attempting to do a write.
> 
> Signed-off-by: B. J. Wyman <bjwyman@gmail.com>

Please be consistent and use "Brandon Wyman".

Guenter

> ---
>   drivers/hwmon/pmbus/ibm-cffps.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/hwmon/pmbus/ibm-cffps.c b/drivers/hwmon/pmbus/ibm-cffps.c
> index 5668d8305b78..df712ce4b164 100644
> --- a/drivers/hwmon/pmbus/ibm-cffps.c
> +++ b/drivers/hwmon/pmbus/ibm-cffps.c
> @@ -50,9 +50,9 @@
>   #define CFFPS_MFR_VAUX_FAULT			BIT(6)
>   #define CFFPS_MFR_CURRENT_SHARE_WARNING		BIT(7)
>   
> -#define CFFPS_LED_BLINK				BIT(0)
> -#define CFFPS_LED_ON				BIT(1)
> -#define CFFPS_LED_OFF				BIT(2)
> +#define CFFPS_LED_BLINK				(BIT(0) | BIT(6))
> +#define CFFPS_LED_ON				(BIT(1) | BIT(6))
> +#define CFFPS_LED_OFF				(BIT(2) | BIT(6))
>   #define CFFPS_BLINK_RATE_MS			250
>   
>   enum {
> 

Re: [PATCH] hwmon: (pmbus/ibm-cffps) Fix write bits for LED control

[Brandon Wyman]

On Wed, Jul 28, 2021 at 6:14 PM Guenter Roeck <linux@roeck-us.net> wrote:
>
> On 7/28/21 3:41 PM, Brandon Wyman wrote:
> > From: "B. J. Wyman" <bjwyman@gmail.com>
> >
> > When doing a PMBus write for the LED control on the IBM Common Form
> > Factor Power Supplies (ibm-cffps), the DAh command requires that bit 7
> > be low and bit 6 be high in order to indicate that you are truly
> > attempting to do a write.
> >
> > Signed-off-by: B. J. Wyman <bjwyman@gmail.com>
>
> Please be consistent and use "Brandon Wyman".

Ack. Curiously, that is the first time someone has pointed out that
inconsistency.

>
> Guenter
>
> > ---
> >   drivers/hwmon/pmbus/ibm-cffps.c | 6 +++---
> >   1 file changed, 3 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/hwmon/pmbus/ibm-cffps.c b/drivers/hwmon/pmbus/ibm-cffps.c
> > index 5668d8305b78..df712ce4b164 100644
> > --- a/drivers/hwmon/pmbus/ibm-cffps.c
> > +++ b/drivers/hwmon/pmbus/ibm-cffps.c
> > @@ -50,9 +50,9 @@
> >   #define CFFPS_MFR_VAUX_FAULT                        BIT(6)
> >   #define CFFPS_MFR_CURRENT_SHARE_WARNING             BIT(7)
> >
> > -#define CFFPS_LED_BLINK                              BIT(0)
> > -#define CFFPS_LED_ON                         BIT(1)
> > -#define CFFPS_LED_OFF                                BIT(2)
> > +#define CFFPS_LED_BLINK                              (BIT(0) | BIT(6))
> > +#define CFFPS_LED_ON                         (BIT(1) | BIT(6))
> > +#define CFFPS_LED_OFF                                (BIT(2) | BIT(6))
> >   #define CFFPS_BLINK_RATE_MS                 250
> >
> >   enum {
> >
>