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Date: Fri, 30 Apr 2021 21:17:01 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: Erik Rosen <erik.rosen@...ormote.com>
Cc: Jean Delvare <jdelvare@...e.com>, Jonathan Corbet <corbet@....net>,
linux-hwmon@...r.kernel.org, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] hwmon: (pmbus/zl6100) Add support for ZLS1003,
ZLS4009 and ZL8802
On Fri, Apr 23, 2021 at 05:33:28PM +0200, Erik Rosen wrote:
> Add support for Renesas ZL8802 Dual Channel/Dual Phase PMBus DC/DC
> Digital Controller as well as ZLS1003 and ZLS4009 custom DC/DC
> controller chips.
>
> Signed-off-by: Erik Rosen <erik.rosen@...ormote.com>
Applied to hwmon-next.
Thanks,
Guenter
> ---
> drivers/hwmon/pmbus/zl6100.c | 94 ++++++++++++++++++++++++++++++------
> 1 file changed, 80 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/hwmon/pmbus/zl6100.c b/drivers/hwmon/pmbus/zl6100.c
> index 69120ca7aaa8..757039bb8a62 100644
> --- a/drivers/hwmon/pmbus/zl6100.c
> +++ b/drivers/hwmon/pmbus/zl6100.c
> @@ -18,7 +18,7 @@
> #include "pmbus.h"
>
> enum chips { zl2004, zl2005, zl2006, zl2008, zl2105, zl2106, zl6100, zl6105,
> - zl9101, zl9117 };
> + zl8802, zl9101, zl9117, zls1003, zls4009 };
>
> struct zl6100_data {
> int id;
> @@ -34,6 +34,13 @@ struct zl6100_data {
>
> #define ZL6100_MFR_XTEMP_ENABLE BIT(7)
>
> +#define ZL8802_MFR_USER_GLOBAL_CONFIG 0xe9
> +#define ZL8802_MFR_TMON_ENABLE BIT(12)
> +#define ZL8802_MFR_USER_CONFIG 0xd1
> +#define ZL8802_MFR_XTEMP_ENABLE_2 BIT(1)
> +#define ZL8802_MFR_DDC_CONFIG 0xd3
> +#define ZL8802_MFR_PHASES_MASK 0x0007
> +
> #define MFR_VMON_OV_FAULT_LIMIT 0xf5
> #define MFR_VMON_UV_FAULT_LIMIT 0xf6
> #define MFR_READ_VMON 0xf7
> @@ -132,7 +139,7 @@ static int zl6100_read_word_data(struct i2c_client *client, int page,
> struct zl6100_data *data = to_zl6100_data(info);
> int ret, vreg;
>
> - if (page > 0)
> + if (page >= info->pages)
> return -ENXIO;
>
> if (data->id == zl2005) {
> @@ -191,7 +198,7 @@ static int zl6100_read_byte_data(struct i2c_client *client, int page, int reg)
> struct zl6100_data *data = to_zl6100_data(info);
> int ret, status;
>
> - if (page > 0)
> + if (page >= info->pages)
> return -ENXIO;
>
> zl6100_wait(data);
> @@ -230,7 +237,7 @@ static int zl6100_write_word_data(struct i2c_client *client, int page, int reg,
> struct zl6100_data *data = to_zl6100_data(info);
> int ret, vreg;
>
> - if (page > 0)
> + if (page >= info->pages)
> return -ENXIO;
>
> switch (reg) {
> @@ -271,7 +278,7 @@ static int zl6100_write_byte(struct i2c_client *client, int page, u8 value)
> struct zl6100_data *data = to_zl6100_data(info);
> int ret;
>
> - if (page > 0)
> + if (page >= info->pages)
> return -ENXIO;
>
> zl6100_wait(data);
> @@ -287,6 +294,10 @@ static const struct i2c_device_id zl6100_id[] = {
> {"bmr462", zl2008},
> {"bmr463", zl2008},
> {"bmr464", zl2008},
> + {"bmr465", zls4009},
> + {"bmr466", zls1003},
> + {"bmr467", zls4009},
> + {"bmr469", zl8802},
> {"zl2004", zl2004},
> {"zl2005", zl2005},
> {"zl2006", zl2006},
> @@ -295,15 +306,18 @@ static const struct i2c_device_id zl6100_id[] = {
> {"zl2106", zl2106},
> {"zl6100", zl6100},
> {"zl6105", zl6105},
> + {"zl8802", zl8802},
> {"zl9101", zl9101},
> {"zl9117", zl9117},
> + {"zls1003", zls1003},
> + {"zls4009", zls4009},
> { }
> };
> MODULE_DEVICE_TABLE(i2c, zl6100_id);
>
> static int zl6100_probe(struct i2c_client *client)
> {
> - int ret;
> + int ret, i;
> struct zl6100_data *data;
> struct pmbus_driver_info *info;
> u8 device_id[I2C_SMBUS_BLOCK_MAX + 1];
> @@ -367,18 +381,70 @@ static int zl6100_probe(struct i2c_client *client)
> | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
>
> /*
> - * ZL2004, ZL9101M, and ZL9117M support monitoring an extra voltage
> - * (VMON for ZL2004, VDRV for ZL9101M and ZL9117M). Report it as vmon.
> + * ZL2004, ZL8802, ZL9101M, ZL9117M and ZLS4009 support monitoring
> + * an extra voltage (VMON for ZL2004, ZL8802 and ZLS4009,
> + * VDRV for ZL9101M and ZL9117M). Report it as vmon.
> */
> - if (data->id == zl2004 || data->id == zl9101 || data->id == zl9117)
> + if (data->id == zl2004 || data->id == zl8802 || data->id == zl9101 ||
> + data->id == zl9117 || data->id == zls4009)
> info->func[0] |= PMBUS_HAVE_VMON | PMBUS_HAVE_STATUS_VMON;
>
> - ret = i2c_smbus_read_word_data(client, ZL6100_MFR_CONFIG);
> - if (ret < 0)
> - return ret;
> + /*
> + * ZL8802 has two outputs that can be used either independently or in
> + * a current sharing configuration. The driver uses the DDC_CONFIG
> + * register to check if the module is running with independent or
> + * shared outputs. If the module is in shared output mode, only one
> + * output voltage will be reported.
> + */
> + if (data->id == zl8802) {
> + info->pages = 2;
> + info->func[0] |= PMBUS_HAVE_IIN;
> +
> + ret = i2c_smbus_read_word_data(client, ZL8802_MFR_DDC_CONFIG);
> + if (ret < 0)
> + return ret;
> +
> + data->access = ktime_get();
> + zl6100_wait(data);
> +
> + if (ret & ZL8802_MFR_PHASES_MASK)
> + info->func[1] |= PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT;
> + else
> + info->func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT
> + | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT;
>
> - if (ret & ZL6100_MFR_XTEMP_ENABLE)
> - info->func[0] |= PMBUS_HAVE_TEMP2;
> + for (i = 0; i < 2; i++) {
> + ret = i2c_smbus_write_byte_data(client, PMBUS_PAGE, i);
> + if (ret < 0)
> + return ret;
> +
> + data->access = ktime_get();
> + zl6100_wait(data);
> +
> + ret = i2c_smbus_read_word_data(client, ZL8802_MFR_USER_CONFIG);
> + if (ret < 0)
> + return ret;
> +
> + if (ret & ZL8802_MFR_XTEMP_ENABLE_2)
> + info->func[i] |= PMBUS_HAVE_TEMP2;
> +
> + data->access = ktime_get();
> + zl6100_wait(data);
> + }
> + ret = i2c_smbus_read_word_data(client, ZL8802_MFR_USER_GLOBAL_CONFIG);
> + if (ret < 0)
> + return ret;
> +
> + if (ret & ZL8802_MFR_TMON_ENABLE)
> + info->func[0] |= PMBUS_HAVE_TEMP3;
> + } else {
> + ret = i2c_smbus_read_word_data(client, ZL6100_MFR_CONFIG);
> + if (ret < 0)
> + return ret;
> +
> + if (ret & ZL6100_MFR_XTEMP_ENABLE)
> + info->func[0] |= PMBUS_HAVE_TEMP2;
> + }
>
> data->access = ktime_get();
> zl6100_wait(data);
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