platform/x86: mlx-platform: Add support for tachometer speed register

Add support for tachometer speed register for the next generation
systems MQMB7xx, MSN37xx, MSN34xx, MSN38xx.

All these systems support tachometer speed capability register.
This register is to be provided mlxreg-fan driver.

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

diff --git a/drivers/platform/x86/mlx-platform.c b/drivers/platform/x86/mlx-platform.c
index 48fa7573e29b29f7966339b1f00868e036aa8fc7..3f129a28ee43068bbe95fcdf22b0e5d5d8a55f7d 100644 (file)
--- a/drivers/platform/x86/mlx-platform.c
+++ b/drivers/platform/x86/mlx-platform.c
@@ -72,6 +72,7 @@
 #define MLXPLAT_CPLD_LPC_REG_FAN_CAP1_OFFSET   0xf5
 #define MLXPLAT_CPLD_LPC_REG_FAN_CAP2_OFFSET   0xf6
 #define MLXPLAT_CPLD_LPC_REG_FAN_DRW_CAP_OFFSET        0xf7
+#define MLXPLAT_CPLD_LPC_REG_TACHO_SPEED_OFFSET        0xf8
 #define MLXPLAT_CPLD_LPC_IO_RANGE              0x100
 #define MLXPLAT_CPLD_LPC_I2C_CH1_OFF           0xdb
 #define MLXPLAT_CPLD_LPC_I2C_CH2_OFF           0xda
@@ -1339,6 +1340,10 @@ static struct mlxreg_core_data mlxplat_mlxcpld_default_fan_data[] = {
                .capability = MLXPLAT_CPLD_LPC_REG_FAN_CAP2_OFFSET,
                .bit = BIT(3),
        },
+       {
+               .label = "conf",
+               .capability = MLXPLAT_CPLD_LPC_REG_TACHO_SPEED_OFFSET,
+       },
 };
 
 static struct mlxreg_core_platform_data mlxplat_default_fan_data = {
@@ -1428,6 +1433,7 @@ static bool mlxplat_mlxcpld_readable_reg(struct device *dev, unsigned int reg)
        case MLXPLAT_CPLD_LPC_REG_FAN_CAP1_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_FAN_CAP2_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_FAN_DRW_CAP_OFFSET:
+       case MLXPLAT_CPLD_LPC_REG_TACHO_SPEED_OFFSET:
                return true;
        }
        return false;
@@ -1484,6 +1490,7 @@ static bool mlxplat_mlxcpld_volatile_reg(struct device *dev, unsigned int reg)
        case MLXPLAT_CPLD_LPC_REG_FAN_CAP1_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_FAN_CAP2_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_FAN_DRW_CAP_OFFSET:
+       case MLXPLAT_CPLD_LPC_REG_TACHO_SPEED_OFFSET:
                return true;
        }
        return false;