platform/x86: mlx-platform: Add mlxreg-fan platform driver activation

Add mlxreg-fan platform driver activation. FAN driver uses the same regmap
infrastructure as others Mellanox platform drivers. Specific registers
description for default FAN platform data configuration are added to
mlx-platform. There are the registers for tachometers reading, PWM
control and FAN ownership control. The last one has a default value,
which is set at initialization time through the regmap infrastructure,
which is necessary for moving FAN control ownership from hardware to
software.

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

1 files changed, 143 insertions, 1 deletions

diff --git a/drivers/platform/x86/mlx-platform.c b/drivers/platform/x86/mlx-platform.c
index 3a227509c7ac..deea6a6339af 100644
--- a/drivers/platform/x86/mlx-platform.c
+++ b/drivers/platform/x86/mlx-platform.c
@@ -59,6 +59,7 @@
 #define MLXPLAT_CPLD_LPC_REG_WP1_OFFSET		0x31
 #define MLXPLAT_CPLD_LPC_REG_GP2_OFFSET		0x32
 #define MLXPLAT_CPLD_LPC_REG_WP2_OFFSET		0x33
+#define MLXPLAT_CPLD_LPC_REG_PWM_CONTROL_OFFSET	0x37
 #define MLXPLAT_CPLD_LPC_REG_AGGR_OFFSET	0x3a
 #define MLXPLAT_CPLD_LPC_REG_AGGR_MASK_OFFSET	0x3b
 #define MLXPLAT_CPLD_LPC_REG_AGGRLO_OFFSET	0x40
@@ -73,9 +74,23 @@
 #define MLXPLAT_CPLD_LPC_REG_FAN_OFFSET		0x88
 #define MLXPLAT_CPLD_LPC_REG_FAN_EVENT_OFFSET	0x89
 #define MLXPLAT_CPLD_LPC_REG_FAN_MASK_OFFSET	0x8a
+#define MLXPLAT_CPLD_LPC_REG_PWM1_OFFSET	0xe3
+#define MLXPLAT_CPLD_LPC_REG_TACHO1_OFFSET	0xe4
+#define MLXPLAT_CPLD_LPC_REG_TACHO2_OFFSET	0xe5
+#define MLXPLAT_CPLD_LPC_REG_TACHO3_OFFSET	0xe6
+#define MLXPLAT_CPLD_LPC_REG_TACHO4_OFFSET	0xe7
+#define MLXPLAT_CPLD_LPC_REG_TACHO5_OFFSET	0xe8
+#define MLXPLAT_CPLD_LPC_REG_TACHO6_OFFSET	0xe9
+#define MLXPLAT_CPLD_LPC_REG_TACHO7_OFFSET	0xea
+#define MLXPLAT_CPLD_LPC_REG_TACHO8_OFFSET	0xeb
+#define MLXPLAT_CPLD_LPC_REG_TACHO9_OFFSET	0xec
+#define MLXPLAT_CPLD_LPC_REG_TACHO10_OFFSET	0xed
+#define MLXPLAT_CPLD_LPC_REG_TACHO11_OFFSET	0xee
+#define MLXPLAT_CPLD_LPC_REG_TACHO12_OFFSET	0xef
 #define MLXPLAT_CPLD_LPC_IO_RANGE		0x100
 #define MLXPLAT_CPLD_LPC_I2C_CH1_OFF		0xdb
 #define MLXPLAT_CPLD_LPC_I2C_CH2_OFF		0xda
+
 #define MLXPLAT_CPLD_LPC_PIO_OFFSET		0x10000UL
 #define MLXPLAT_CPLD_LPC_REG1	((MLXPLAT_CPLD_LPC_REG_BASE_ADRR + \
 				  MLXPLAT_CPLD_LPC_I2C_CH1_OFF) | \
@@ -131,6 +146,7 @@
  * @pdev_hotplug - hotplug platform devices
  * @pdev_led - led platform devices
  * @pdev_io_regs - register access platform devices
+ * @pdev_fan - FAN platform devices
  */
 struct mlxplat_priv {
 	struct platform_device *pdev_i2c;
@@ -138,6 +154,7 @@ struct mlxplat_priv {
 	struct platform_device *pdev_hotplug;
 	struct platform_device *pdev_led;
 	struct platform_device *pdev_io_regs;
+	struct platform_device *pdev_fan;
 };
 
 /* Regions for LPC I2C controller and LPC base register space */
@@ -929,6 +946,79 @@ static struct mlxreg_core_platform_data mlxplat_default_regs_io_data = {
 		.counter = ARRAY_SIZE(mlxplat_mlxcpld_default_regs_io_data),
 };
 
+/* Platform FAN default */
+static struct mlxreg_core_data mlxplat_mlxcpld_default_fan_data[] = {
+	{
+		.label = "pwm1",
+		.reg = MLXPLAT_CPLD_LPC_REG_PWM1_OFFSET,
+	},
+	{
+		.label = "tacho1",
+		.reg = MLXPLAT_CPLD_LPC_REG_TACHO1_OFFSET,
+		.mask = GENMASK(7, 0),
+	},
+	{
+		.label = "tacho2",
+		.reg = MLXPLAT_CPLD_LPC_REG_TACHO2_OFFSET,
+		.mask = GENMASK(7, 0),
+	},
+	{
+		.label = "tacho3",
+		.reg = MLXPLAT_CPLD_LPC_REG_TACHO3_OFFSET,
+		.mask = GENMASK(7, 0),
+	},
+	{
+		.label = "tacho4",
+		.reg = MLXPLAT_CPLD_LPC_REG_TACHO4_OFFSET,
+		.mask = GENMASK(7, 0),
+	},
+	{
+		.label = "tacho5",
+		.reg = MLXPLAT_CPLD_LPC_REG_TACHO5_OFFSET,
+		.mask = GENMASK(7, 0),
+	},
+	{
+		.label = "tacho6",
+		.reg = MLXPLAT_CPLD_LPC_REG_TACHO6_OFFSET,
+		.mask = GENMASK(7, 0),
+	},
+	{
+		.label = "tacho7",
+		.reg = MLXPLAT_CPLD_LPC_REG_TACHO7_OFFSET,
+		.mask = GENMASK(7, 0),
+	},
+	{
+		.label = "tacho8",
+		.reg = MLXPLAT_CPLD_LPC_REG_TACHO8_OFFSET,
+		.mask = GENMASK(7, 0),
+	},
+	{
+		.label = "tacho9",
+		.reg = MLXPLAT_CPLD_LPC_REG_TACHO9_OFFSET,
+		.mask = GENMASK(7, 0),
+	},
+	{
+		.label = "tacho10",
+		.reg = MLXPLAT_CPLD_LPC_REG_TACHO10_OFFSET,
+		.mask = GENMASK(7, 0),
+	},
+	{
+		.label = "tacho11",
+		.reg = MLXPLAT_CPLD_LPC_REG_TACHO11_OFFSET,
+		.mask = GENMASK(7, 0),
+	},
+	{
+		.label = "tacho12",
+		.reg = MLXPLAT_CPLD_LPC_REG_TACHO12_OFFSET,
+		.mask = GENMASK(7, 0),
+	},
+};
+
+static struct mlxreg_core_platform_data mlxplat_default_fan_data = {
+		.data = mlxplat_mlxcpld_default_fan_data,
+		.counter = ARRAY_SIZE(mlxplat_mlxcpld_default_fan_data),
+};
+
 static bool mlxplat_mlxcpld_writeable_reg(struct device *dev, unsigned int reg)
 {
 	switch (reg) {
@@ -949,6 +1039,8 @@ static bool mlxplat_mlxcpld_writeable_reg(struct device *dev, unsigned int reg)
 	case MLXPLAT_CPLD_LPC_REG_PWR_MASK_OFFSET:
 	case MLXPLAT_CPLD_LPC_REG_FAN_EVENT_OFFSET:
 	case MLXPLAT_CPLD_LPC_REG_FAN_MASK_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_PWM1_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_PWM_CONTROL_OFFSET:
 		return true;
 	}
 	return false;
@@ -983,6 +1075,20 @@ static bool mlxplat_mlxcpld_readable_reg(struct device *dev, unsigned int reg)
 	case MLXPLAT_CPLD_LPC_REG_FAN_OFFSET:
 	case MLXPLAT_CPLD_LPC_REG_FAN_EVENT_OFFSET:
 	case MLXPLAT_CPLD_LPC_REG_FAN_MASK_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_PWM1_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO1_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO2_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO3_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO4_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO5_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO6_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO7_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO8_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO9_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO10_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO11_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO12_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_PWM_CONTROL_OFFSET:
 		return true;
 	}
 	return false;
@@ -1015,6 +1121,20 @@ static bool mlxplat_mlxcpld_volatile_reg(struct device *dev, unsigned int reg)
 	case MLXPLAT_CPLD_LPC_REG_FAN_OFFSET:
 	case MLXPLAT_CPLD_LPC_REG_FAN_EVENT_OFFSET:
 	case MLXPLAT_CPLD_LPC_REG_FAN_MASK_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_PWM1_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO1_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO2_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO3_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO4_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO5_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO6_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO7_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO8_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO9_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO10_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO11_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_TACHO12_OFFSET:
+	case MLXPLAT_CPLD_LPC_REG_PWM_CONTROL_OFFSET:
 		return true;
 	}
 	return false;
@@ -1023,6 +1143,7 @@ static bool mlxplat_mlxcpld_volatile_reg(struct device *dev, unsigned int reg)
 static const struct reg_default mlxplat_mlxcpld_regmap_default[] = {
 	{ MLXPLAT_CPLD_LPC_REG_WP1_OFFSET, 0x00 },
 	{ MLXPLAT_CPLD_LPC_REG_WP2_OFFSET, 0x00 },
+	{ MLXPLAT_CPLD_LPC_REG_PWM_CONTROL_OFFSET, 0x00 },
 };
 
 struct mlxplat_mlxcpld_regmap_context {
@@ -1071,6 +1192,7 @@ static struct platform_device *mlxplat_dev;
 static struct mlxreg_core_hotplug_platform_data *mlxplat_hotplug;
 static struct mlxreg_core_platform_data *mlxplat_led;
 static struct mlxreg_core_platform_data *mlxplat_regs_io;
+static struct mlxreg_core_platform_data *mlxplat_fan;
 
 static int __init mlxplat_dmi_default_matched(const struct dmi_system_id *dmi)
 {
@@ -1155,6 +1277,7 @@ static int __init mlxplat_dmi_qmb7xx_matched(const struct dmi_system_id *dmi)
 	mlxplat_hotplug->deferred_nr =
 		mlxplat_msn21xx_channels[MLXPLAT_CPLD_GRP_CHNL_NUM - 1];
 	mlxplat_led = &mlxplat_msn21xx_led_data;
+	mlxplat_fan = &mlxplat_default_fan_data;
 
 	return 1;
 };
@@ -1410,14 +1533,31 @@ static int __init mlxplat_init(void)
 		}
 	}
 
+	/* Add FAN driver. */
+	if (mlxplat_fan) {
+		mlxplat_fan->regmap = mlxplat_hotplug->regmap;
+		priv->pdev_fan = platform_device_register_resndata(
+					&mlxplat_dev->dev, "mlxreg-fan",
+					PLATFORM_DEVID_NONE, NULL, 0,
+					mlxplat_fan,
+					sizeof(*mlxplat_fan));
+		if (IS_ERR(priv->pdev_io_regs)) {
+			err = PTR_ERR(priv->pdev_io_regs);
+			goto fail_platform_io_regs_register;
+		}
+	}
+
 	/* Sync registers with hardware. */
 	regcache_mark_dirty(mlxplat_hotplug->regmap);
 	err = regcache_sync(mlxplat_hotplug->regmap);
 	if (err)
-		goto fail_platform_io_regs_register;
+		goto fail_platform_fan_register;
 
 	return 0;
 
+fail_platform_fan_register:
+	if (mlxplat_fan)
+		platform_device_unregister(priv->pdev_fan);
 fail_platform_io_regs_register:
 	if (mlxplat_regs_io)
 		platform_device_unregister(priv->pdev_io_regs);
@@ -1441,6 +1581,8 @@ static void __exit mlxplat_exit(void)
 	struct mlxplat_priv *priv = platform_get_drvdata(mlxplat_dev);
 	int i;
 
+	if (priv->pdev_fan)
+		platform_device_unregister(priv->pdev_fan);
 	if (priv->pdev_io_regs)
 		platform_device_unregister(priv->pdev_io_regs);
 	platform_device_unregister(priv->pdev_led);