platform/x86: mlx-platform: Add support for fan direction register

Provide support for the fan direction register.
This register shows configuration for system fans direction, which could
be forward or reversed.
For forward direction - relevant bit is set 0;
For reversed direction - relevant bit is set 1.

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>

diff --git a/drivers/platform/x86/mlx-platform.c b/drivers/platform/x86/mlx-platform.c
index df3fcd36776a99a4f5ed929060fdfba00cfa6f42..3b795680d81cbe982f388a4d05462427ed8ae8a2 100644 (file)
--- a/drivers/platform/x86/mlx-platform.c
+++ b/drivers/platform/x86/mlx-platform.c
@@ -33,6 +33,7 @@
 #define MLXPLAT_CPLD_LPC_REG_LED3_OFFSET       0x22
 #define MLXPLAT_CPLD_LPC_REG_LED4_OFFSET       0x23
 #define MLXPLAT_CPLD_LPC_REG_LED5_OFFSET       0x24
+#define MLXPLAT_CPLD_LPC_REG_FAN_DIRECTION     0x2a
 #define MLXPLAT_CPLD_LPC_REG_GP1_OFFSET                0x30
 #define MLXPLAT_CPLD_LPC_REG_WP1_OFFSET                0x31
 #define MLXPLAT_CPLD_LPC_REG_GP2_OFFSET                0x32
@@ -1184,6 +1185,12 @@ static struct mlxreg_core_data mlxplat_mlxcpld_default_ng_regs_io_data[] = {
                .bit = 1,
                .mode = 0444,
        },
+       {
+               .label = "fan_dir",
+               .reg = MLXPLAT_CPLD_LPC_REG_FAN_DIRECTION,
+               .bit = GENMASK(7, 0),
+               .mode = 0200,
+       },
 };
 
 static struct mlxreg_core_platform_data mlxplat_default_ng_regs_io_data = {
@@ -1307,6 +1314,7 @@ static bool mlxplat_mlxcpld_readable_reg(struct device *dev, unsigned int reg)
        case MLXPLAT_CPLD_LPC_REG_LED3_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_LED4_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_LED5_OFFSET:
+       case MLXPLAT_CPLD_LPC_REG_FAN_DIRECTION:
        case MLXPLAT_CPLD_LPC_REG_GP1_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_WP1_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_GP2_OFFSET:
@@ -1360,6 +1368,7 @@ static bool mlxplat_mlxcpld_volatile_reg(struct device *dev, unsigned int reg)
        case MLXPLAT_CPLD_LPC_REG_LED3_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_LED4_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_LED5_OFFSET:
+       case MLXPLAT_CPLD_LPC_REG_FAN_DIRECTION:
        case MLXPLAT_CPLD_LPC_REG_GP1_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_GP2_OFFSET:
        case MLXPLAT_CPLD_LPC_REG_AGGR_OFFSET: