On Mon, Oct 28, 2019 at 04:49:03PM -0700, rentao.bupt@xxxxxxxxx wrote:
> From: Tao Ren <rentao.bupt@xxxxxxxxx>
>
> Add the driver to support BEL PFE3000 which is 3000 Wat AC to DC power
which is a ...
Watt
> supply. The chip has 8 pages.
FWIW, that is a bit misleading here. It isn't really 8 pages. I would suggest
to drop that comment (or, if you insist, at least add "two of which are
reserved").
>
> Signed-off-by: Tao Ren <rentao.bupt@xxxxxxxxx>
> ---
> drivers/hwmon/pmbus/bel-pfe.c | 65 ++++++++++++++++++++++++++++++++++-
> 1 file changed, 64 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/hwmon/pmbus/bel-pfe.c b/drivers/hwmon/pmbus/bel-pfe.c
> index 117f9af21bf3..7b6c90b056c9 100644
> --- a/drivers/hwmon/pmbus/bel-pfe.c
> +++ b/drivers/hwmon/pmbus/bel-pfe.c
> @@ -10,9 +10,21 @@
> #include <linux/init.h>
> #include <linux/err.h>
> #include <linux/i2c.h>
> +#include <linux/pmbus.h>
> +
> #include "pmbus.h"
>
> -enum chips {pfe1100};
> +enum chips {pfe1100, pfe3000};
> +
> +/*
> + * Disable status check for pfe3000 devices, because some devices report
> + * communication error (invalid command) for VOUT_MODE command (0x20)
> + * although correct VOUT_MODE (0x16) is returned: it leads to incorrect
> + * exponent in linear mode.
> + */
> +static struct pmbus_platform_data pfe3000_plat_data = {
> + .flags = PMBUS_SKIP_STATUS_CHECK,
> +};
>
> static struct pmbus_driver_info pfe_driver_info[] = {
> [pfe1100] = {
> @@ -34,6 +46,45 @@ static struct pmbus_driver_info pfe_driver_info[] = {
> PMBUS_HAVE_STATUS_TEMP |
> PMBUS_HAVE_FAN12,
> },
> +
> + [pfe3000] = {
> + .pages = 8,
> + .format[PSC_VOLTAGE_IN] = linear,
> + .format[PSC_VOLTAGE_OUT] = linear,
> + .format[PSC_CURRENT_IN] = linear,
> + .format[PSC_CURRENT_OUT] = linear,
> + .format[PSC_POWER] = linear,
> + .format[PSC_TEMPERATURE] = linear,
> + .format[PSC_FAN] = linear,
> +
> + /* Page 0: V1. */
> + .func[0] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
> + PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
> + PMBUS_HAVE_POUT | PMBUS_HAVE_FAN12 |
> + PMBUS_HAVE_VIN | PMBUS_HAVE_IIN |
> + PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
> + PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 |
> + PMBUS_HAVE_TEMP3 | PMBUS_HAVE_STATUS_TEMP |
> + PMBUS_HAVE_VCAP,
> +
> + /* Page 1: Vsb. */
> + .func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
> + PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
> + PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
> + PMBUS_HAVE_POUT,
> +
> + /*
> + * Page 2: V1 Ishare.
> + * Page 4: V1 Cathode.
> + * Page 5: Vsb Cathode.
> + * Page 6: V1 Sense.
> + * Page 3 and 7 are reserved.
If page 7 is reserved, and doesn't have any attributes, it doesn't really
make sense to claim support for 8 pages above. I would suugest to make it 7.
> + */
> + .func[2] = PMBUS_HAVE_VOUT,
> + .func[4] = PMBUS_HAVE_VOUT,
> + .func[5] = PMBUS_HAVE_VOUT,
> + .func[6] = PMBUS_HAVE_VOUT,
> + },
> };
>
> static int pfe_pmbus_probe(struct i2c_client *client,
> @@ -42,11 +93,23 @@ static int pfe_pmbus_probe(struct i2c_client *client,
> int model;
>
> model = (int)id->driver_data;
> +
> + /*
> + * PFE3000-12-069RA devices may not stay in page 0 during device
> + * probe which leads to probe failure (read status word failed).
> + * So let's set the device to page 0 at the beginning.
> + */
> + if (model == pfe3000) {
> + client->dev.platform_data = &pfe3000_plat_data;
> + i2c_smbus_write_byte_data(client, PMBUS_PAGE, 0);
> + }
> +
> return pmbus_do_probe(client, id, &pfe_driver_info[model]);
> }
>
> static const struct i2c_device_id pfe_device_id[] = {
> {"pfe1100", pfe1100},
> + {"pfe3000", pfe3000},
> {}
> };
>
