[patch v2 0/3] platform/x86: mlx-platform: Add support for new Mellanox systems

[patch v2 0/3] platform/x86: mlx-platform: Add support for new Mellanox systems

[Vadim Pasternak]

Add support for the next new Mellanox system types: msn274x, msn201x,
qmb7, sn34, sn37. The current members of these types are:
- MSN2740 (32x100GbE Ethernet switch with cost reduction);
- MSN2010 (18x10GbE plus 4x4x25GbE);
- QMB700 (40x200GbE InfiniBand switch);
- SN3700 (32x200GbE and 16x400GbE Ethernet switch);
- SN3410 (6x400GbE plus 48x50GbE Ethernet switch).

Vadim Pasternak (3):
  platform/x86: mlx-platform: Add support for new msn274x system type
  platform/x86: mlx-platform: Add support for new  msn201x system type
  platform/x86: mlx-platform: Add support for new 200G IB and Ethernet
    systems

 drivers/platform/x86/mlx-platform.c | 325 ++++++++++++++++++++++++++++++++++++
 1 file changed, 325 insertions(+)

-- 
2.1.4

[patch v2 1/3] platform/x86: mlx-platform: Add support for new msn274x system type

[Vadim Pasternak]

It adds support for new Mellanox system types of basic class msn274x,
containing system MSN2740 (32x100GbE Ethernet switch with cost reduction)
and its derivatives. These are the Top of the Rack system, equipped with
Mellanox Small Form Factor carrier board and switch board with Mellanox
Spectrum device, which supports Ethernet switching with 32X100G ports line
rate of up to EDR speed.

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
v1->v2
  Comments pointed out by Darren:
  - Break the patch into series of patches per system type.
---
 drivers/platform/x86/mlx-platform.c | 124 ++++++++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)

diff --git a/drivers/platform/x86/mlx-platform.c b/drivers/platform/x86/mlx-platform.c
index e87fe34..3a13285 100644
--- a/drivers/platform/x86/mlx-platform.c
+++ b/drivers/platform/x86/mlx-platform.c
@@ -94,6 +94,7 @@
 /* Hotplug devices adapter numbers */
 #define MLXPLAT_CPLD_NR_NONE			-1
 #define MLXPLAT_CPLD_PSU_DEFAULT_NR		10
+#define MLXPLAT_CPLD_PSU_MSNXXXX_NR		4
 #define MLXPLAT_CPLD_FAN1_DEFAULT_NR		11
 #define MLXPLAT_CPLD_FAN2_DEFAULT_NR		12
 #define MLXPLAT_CPLD_FAN3_DEFAULT_NR		13
@@ -335,6 +336,108 @@ struct mlxreg_core_hotplug_platform_data mlxplat_mlxcpld_msn21xx_data = {
 	.mask_low = MLXPLAT_CPLD_LOW_AGGR_MASK_LOW,
 };
 
+/* Platform hotplug msn274x system family data */
+static struct mlxreg_core_data mlxplat_mlxcpld_msn274x_psu_items_data[] = {
+	{
+		.label = "psu1",
+		.reg = MLXPLAT_CPLD_LPC_REG_PSU_OFFSET,
+		.mask = BIT(0),
+		.hpdev.brdinfo = &mlxplat_mlxcpld_psu[0],
+		.hpdev.nr = MLXPLAT_CPLD_PSU_MSNXXXX_NR,
+	},
+	{
+		.label = "psu2",
+		.reg = MLXPLAT_CPLD_LPC_REG_PSU_OFFSET,
+		.mask = BIT(1),
+		.hpdev.brdinfo = &mlxplat_mlxcpld_psu[1],
+		.hpdev.nr = MLXPLAT_CPLD_PSU_MSNXXXX_NR,
+	},
+};
+
+static struct mlxreg_core_data mlxplat_mlxcpld_default_ng_pwr_items_data[] = {
+	{
+		.label = "pwr1",
+		.reg = MLXPLAT_CPLD_LPC_REG_PWR_OFFSET,
+		.mask = BIT(0),
+		.hpdev.brdinfo = &mlxplat_mlxcpld_pwr[0],
+		.hpdev.nr = MLXPLAT_CPLD_PSU_MSNXXXX_NR,
+	},
+	{
+		.label = "pwr2",
+		.reg = MLXPLAT_CPLD_LPC_REG_PWR_OFFSET,
+		.mask = BIT(1),
+		.hpdev.brdinfo = &mlxplat_mlxcpld_pwr[1],
+		.hpdev.nr = MLXPLAT_CPLD_PSU_MSNXXXX_NR,
+	},
+};
+
+static struct mlxreg_core_data mlxplat_mlxcpld_msn274x_fan_items_data[] = {
+	{
+		.label = "fan1",
+		.reg = MLXPLAT_CPLD_LPC_REG_FAN_OFFSET,
+		.mask = BIT(0),
+		.hpdev.nr = MLXPLAT_CPLD_NR_NONE,
+	},
+	{
+		.label = "fan2",
+		.reg = MLXPLAT_CPLD_LPC_REG_FAN_OFFSET,
+		.mask = BIT(1),
+		.hpdev.nr = MLXPLAT_CPLD_NR_NONE,
+	},
+	{
+		.label = "fan3",
+		.reg = MLXPLAT_CPLD_LPC_REG_FAN_OFFSET,
+		.mask = BIT(2),
+		.hpdev.nr = MLXPLAT_CPLD_NR_NONE,
+	},
+	{
+		.label = "fan4",
+		.reg = MLXPLAT_CPLD_LPC_REG_FAN_OFFSET,
+		.mask = BIT(3),
+		.hpdev.nr = MLXPLAT_CPLD_NR_NONE,
+	},
+};
+
+static struct mlxreg_core_item mlxplat_mlxcpld_msn274x_items[] = {
+	{
+		.data = mlxplat_mlxcpld_msn274x_psu_items_data,
+		.aggr_mask = MLXPLAT_CPLD_AGGR_MASK_NG_DEF,
+		.reg = MLXPLAT_CPLD_LPC_REG_PSU_OFFSET,
+		.mask = MLXPLAT_CPLD_PSU_MASK,
+		.count = ARRAY_SIZE(mlxplat_mlxcpld_msn274x_psu_items_data),
+		.inversed = 1,
+		.health = false,
+	},
+	{
+		.data = mlxplat_mlxcpld_default_ng_pwr_items_data,
+		.aggr_mask = MLXPLAT_CPLD_AGGR_MASK_NG_DEF,
+		.reg = MLXPLAT_CPLD_LPC_REG_PWR_OFFSET,
+		.mask = MLXPLAT_CPLD_PWR_MASK,
+		.count = ARRAY_SIZE(mlxplat_mlxcpld_default_ng_pwr_items_data),
+		.inversed = 0,
+		.health = false,
+	},
+	{
+		.data = mlxplat_mlxcpld_msn274x_fan_items_data,
+		.aggr_mask = MLXPLAT_CPLD_AGGR_MASK_NG_DEF,
+		.reg = MLXPLAT_CPLD_LPC_REG_FAN_OFFSET,
+		.mask = MLXPLAT_CPLD_FAN_MASK,
+		.count = ARRAY_SIZE(mlxplat_mlxcpld_msn274x_fan_items_data),
+		.inversed = 1,
+		.health = false,
+	},
+};
+
+static
+struct mlxreg_core_hotplug_platform_data mlxplat_mlxcpld_msn274x_data = {
+	.items = mlxplat_mlxcpld_msn274x_items,
+	.counter = ARRAY_SIZE(mlxplat_mlxcpld_msn274x_items),
+	.cell = MLXPLAT_CPLD_LPC_REG_AGGR_OFFSET,
+	.mask = MLXPLAT_CPLD_AGGR_MASK_NG_DEF,
+	.cell_low = MLXPLAT_CPLD_LPC_REG_AGGRLO_OFFSET,
+	.mask_low = MLXPLAT_CPLD_LOW_AGGR_MASK_LOW,
+};
+
 static bool mlxplat_mlxcpld_writeable_reg(struct device *dev, unsigned int reg)
 {
 	switch (reg) {
@@ -464,8 +567,29 @@ static int __init mlxplat_dmi_msn21xx_matched(const struct dmi_system_id *dmi)
 	return 1;
 };
 
+static int __init mlxplat_dmi_msn274x_matched(const struct dmi_system_id *dmi)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(mlxplat_mux_data); i++) {
+		mlxplat_mux_data[i].values = mlxplat_msn21xx_channels;
+		mlxplat_mux_data[i].n_values =
+				ARRAY_SIZE(mlxplat_msn21xx_channels);
+	}
+	mlxplat_hotplug = &mlxplat_mlxcpld_msn274x_data;
+
+	return 1;
+};
+
 static const struct dmi_system_id mlxplat_dmi_table[] __initconst = {
 	{
+		.callback = mlxplat_dmi_msn274x_matched,
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Mellanox Technologies"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "MSN274"),
+		},
+	},
+	{
 		.callback = mlxplat_dmi_default_matched,
 		.matches = {
 			DMI_MATCH(DMI_BOARD_VENDOR, "Mellanox Technologies"),
-- 
2.1.4

[patch v2 2/3] platform/x86: mlx-platform: Add support for new msn201x system type

[Vadim Pasternak]

It adds support for new Mellanox system types of basic half unit size
class msn201x, containing system MSN2010 (18x10GbE plus 4x4x25GbE) half
and its derivatives. This is the Top of the Rack system, equipped with
Mellanox Small Form Factor carrier board and switch board with Mellanox
Spectrum device, which supports Ethernet switching with 32X100G ports line
rate of up to EDR speed.

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
v1->v2
  Comments pointed out by Darren:
  - Break the patch into series of patches per system type.
---
 drivers/platform/x86/mlx-platform.c | 59 +++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)

diff --git a/drivers/platform/x86/mlx-platform.c b/drivers/platform/x86/mlx-platform.c
index 3a13285..e4251cf 100644
--- a/drivers/platform/x86/mlx-platform.c
+++ b/drivers/platform/x86/mlx-platform.c
@@ -438,6 +438,44 @@ struct mlxreg_core_hotplug_platform_data mlxplat_mlxcpld_msn274x_data = {
 	.mask_low = MLXPLAT_CPLD_LOW_AGGR_MASK_LOW,
 };
 
+/* Platform hotplug MSN201x system family data */
+static struct mlxreg_core_data mlxplat_mlxcpld_msn201x_pwr_items_data[] = {
+	{
+		.label = "pwr1",
+		.reg = MLXPLAT_CPLD_LPC_REG_PWR_OFFSET,
+		.mask = BIT(0),
+		.hpdev.nr = MLXPLAT_CPLD_NR_NONE,
+	},
+	{
+		.label = "pwr2",
+		.reg = MLXPLAT_CPLD_LPC_REG_PWR_OFFSET,
+		.mask = BIT(1),
+		.hpdev.nr = MLXPLAT_CPLD_NR_NONE,
+	},
+};
+
+static struct mlxreg_core_item mlxplat_mlxcpld_msn201x_items[] = {
+	{
+		.data = mlxplat_mlxcpld_msn201x_pwr_items_data,
+		.aggr_mask = MLXPLAT_CPLD_AGGR_PWR_MASK_DEF,
+		.reg = MLXPLAT_CPLD_LPC_REG_PWR_OFFSET,
+		.mask = MLXPLAT_CPLD_PWR_MASK,
+		.count = ARRAY_SIZE(mlxplat_mlxcpld_msn201x_pwr_items_data),
+		.inversed = 0,
+		.health = false,
+	},
+};
+
+static
+struct mlxreg_core_hotplug_platform_data mlxplat_mlxcpld_msn201x_data = {
+	.items = mlxplat_mlxcpld_msn21xx_items,
+	.counter = ARRAY_SIZE(mlxplat_mlxcpld_msn201x_items),
+	.cell = MLXPLAT_CPLD_LPC_REG_AGGR_OFFSET,
+	.mask = MLXPLAT_CPLD_AGGR_MASK_DEF,
+	.cell_low = MLXPLAT_CPLD_LPC_REG_AGGRLO_OFFSET,
+	.mask_low = MLXPLAT_CPLD_LOW_AGGR_MASK_LOW,
+};
+
 static bool mlxplat_mlxcpld_writeable_reg(struct device *dev, unsigned int reg)
 {
 	switch (reg) {
@@ -581,6 +619,20 @@ static int __init mlxplat_dmi_msn274x_matched(const struct dmi_system_id *dmi)
 	return 1;
 };
 
+static int __init mlxplat_dmi_msn201x_matched(const struct dmi_system_id *dmi)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(mlxplat_mux_data); i++) {
+		mlxplat_mux_data[i].values = mlxplat_msn21xx_channels;
+		mlxplat_mux_data[i].n_values =
+				ARRAY_SIZE(mlxplat_msn21xx_channels);
+	}
+	mlxplat_hotplug = &mlxplat_mlxcpld_msn201x_data;
+
+	return 1;
+};
+
 static const struct dmi_system_id mlxplat_dmi_table[] __initconst = {
 	{
 		.callback = mlxplat_dmi_msn274x_matched,
@@ -624,6 +676,13 @@ static const struct dmi_system_id mlxplat_dmi_table[] __initconst = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "MSN21"),
 		},
 	},
+	{
+		.callback = mlxplat_dmi_msn201x_matched,
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Mellanox Technologies"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "MSN201"),
+		},
+	},
 	{ }
 };
 
-- 
2.1.4

[patch v2 3/3] platform/x86: mlx-platform: Add support for new 200G IB and Ethernet systems

[Vadim Pasternak]

It adds support for new Mellanox system types of basic classes qmb7, sn34,
sn37, containing systems QMB700 (40x200GbE InfiniBand switch), SN3700
(32x200GbE and 16x400GbE Ethernet switch) and SN3410 (6x400GbE plus
48x50GbE Ethernet switch). These are the Top of the Rack systems, equipped
with Mellanox COM-Express carrier board and switch board with Mellanox
Quantum device, which supports InfiniBand switching with 40X200G ports and
line rate of up to HDR speed or with Mellanox Spectrum-2 device, which
supports Ethernet switching with 32X200G ports line rate of up to HDR
speed.

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
v1->v2
  Comments pointed out by Darren:
  - Break the patch into series of patches per system type.
---
 drivers/platform/x86/mlx-platform.c | 142 ++++++++++++++++++++++++++++++++++++
 1 file changed, 142 insertions(+)

diff --git a/drivers/platform/x86/mlx-platform.c b/drivers/platform/x86/mlx-platform.c
index e4251cf..454e14f 100644
--- a/drivers/platform/x86/mlx-platform.c
+++ b/drivers/platform/x86/mlx-platform.c
@@ -83,6 +83,7 @@
 #define MLXPLAT_CPLD_PSU_MASK		GENMASK(1, 0)
 #define MLXPLAT_CPLD_PWR_MASK		GENMASK(1, 0)
 #define MLXPLAT_CPLD_FAN_MASK		GENMASK(3, 0)
+#define MLXPLAT_CPLD_FAN_NG_MASK	GENMASK(5, 0)
 
 /* Start channel numbers */
 #define MLXPLAT_CPLD_CH1			2
@@ -170,6 +171,15 @@ static struct i2c_board_info mlxplat_mlxcpld_psu[] = {
 	},
 };
 
+static struct i2c_board_info mlxplat_mlxcpld_ng_psu[] = {
+	{
+		I2C_BOARD_INFO("24c32", 0x51),
+	},
+	{
+		I2C_BOARD_INFO("24c32", 0x50),
+	},
+};
+
 static struct i2c_board_info mlxplat_mlxcpld_pwr[] = {
 	{
 		I2C_BOARD_INFO("dps460", 0x59),
@@ -476,6 +486,103 @@ struct mlxreg_core_hotplug_platform_data mlxplat_mlxcpld_msn201x_data = {
 	.mask_low = MLXPLAT_CPLD_LOW_AGGR_MASK_LOW,
 };
 
+/* Platform hotplug next generation system family data */
+static struct mlxreg_core_data mlxplat_mlxcpld_default_ng_psu_items_data[] = {
+	{
+		.label = "psu1",
+		.reg = MLXPLAT_CPLD_LPC_REG_PSU_OFFSET,
+		.mask = BIT(0),
+		.hpdev.brdinfo = &mlxplat_mlxcpld_ng_psu[0],
+		.hpdev.nr = MLXPLAT_CPLD_PSU_MSNXXXX_NR,
+	},
+	{
+		.label = "psu2",
+		.reg = MLXPLAT_CPLD_LPC_REG_PSU_OFFSET,
+		.mask = BIT(1),
+		.hpdev.brdinfo = &mlxplat_mlxcpld_ng_psu[1],
+		.hpdev.nr = MLXPLAT_CPLD_PSU_MSNXXXX_NR,
+	},
+};
+
+static struct mlxreg_core_data mlxplat_mlxcpld_default_ng_fan_items_data[] = {
+	{
+		.label = "fan1",
+		.reg = MLXPLAT_CPLD_LPC_REG_FAN_OFFSET,
+		.mask = BIT(0),
+		.hpdev.nr = MLXPLAT_CPLD_NR_NONE,
+	},
+	{
+		.label = "fan2",
+		.reg = MLXPLAT_CPLD_LPC_REG_FAN_OFFSET,
+		.mask = BIT(1),
+		.hpdev.nr = MLXPLAT_CPLD_NR_NONE,
+	},
+	{
+		.label = "fan3",
+		.reg = MLXPLAT_CPLD_LPC_REG_FAN_OFFSET,
+		.mask = BIT(2),
+		.hpdev.nr = MLXPLAT_CPLD_NR_NONE,
+	},
+	{
+		.label = "fan4",
+		.reg = MLXPLAT_CPLD_LPC_REG_FAN_OFFSET,
+		.mask = BIT(3),
+		.hpdev.nr = MLXPLAT_CPLD_NR_NONE,
+	},
+	{
+		.label = "fan5",
+		.reg = MLXPLAT_CPLD_LPC_REG_FAN_OFFSET,
+		.mask = BIT(4),
+		.hpdev.nr = MLXPLAT_CPLD_NR_NONE,
+	},
+	{
+		.label = "fan6",
+		.reg = MLXPLAT_CPLD_LPC_REG_FAN_OFFSET,
+		.mask = BIT(5),
+		.hpdev.nr = MLXPLAT_CPLD_NR_NONE,
+	},
+};
+
+static struct mlxreg_core_item mlxplat_mlxcpld_default_ng_items[] = {
+	{
+		.data = mlxplat_mlxcpld_default_ng_psu_items_data,
+		.aggr_mask = MLXPLAT_CPLD_AGGR_MASK_NG_DEF,
+		.reg = MLXPLAT_CPLD_LPC_REG_PSU_OFFSET,
+		.mask = MLXPLAT_CPLD_PSU_MASK,
+		.count = ARRAY_SIZE(mlxplat_mlxcpld_default_ng_psu_items_data),
+		.inversed = 1,
+		.health = false,
+	},
+	{
+		.data = mlxplat_mlxcpld_default_ng_pwr_items_data,
+		.aggr_mask = MLXPLAT_CPLD_AGGR_MASK_NG_DEF,
+		.reg = MLXPLAT_CPLD_LPC_REG_PWR_OFFSET,
+		.mask = MLXPLAT_CPLD_PWR_MASK,
+		.count = ARRAY_SIZE(mlxplat_mlxcpld_default_ng_pwr_items_data),
+		.inversed = 0,
+		.health = false,
+	},
+	{
+		.data = mlxplat_mlxcpld_default_ng_fan_items_data,
+		.aggr_mask = MLXPLAT_CPLD_AGGR_MASK_NG_DEF,
+		.reg = MLXPLAT_CPLD_LPC_REG_FAN_OFFSET,
+		.mask = MLXPLAT_CPLD_FAN_NG_MASK,
+		.count = ARRAY_SIZE(mlxplat_mlxcpld_default_ng_fan_items_data),
+		.inversed = 1,
+		.health = false,
+	},
+};
+
+static
+struct mlxreg_core_hotplug_platform_data mlxplat_mlxcpld_default_ng_data = {
+	.items = mlxplat_mlxcpld_default_ng_items,
+	.counter = ARRAY_SIZE(mlxplat_mlxcpld_default_ng_items),
+	.cell = MLXPLAT_CPLD_LPC_REG_AGGR_OFFSET,
+	.mask = MLXPLAT_CPLD_AGGR_MASK_NG_DEF,
+	.cell_low = MLXPLAT_CPLD_LPC_REG_AGGRLO_OFFSET,
+	.mask_low = MLXPLAT_CPLD_LOW_AGGR_MASK_LOW,
+};
+
 static bool mlxplat_mlxcpld_writeable_reg(struct device *dev, unsigned int reg)
 {
 	switch (reg) {
@@ -633,6 +740,20 @@ static int __init mlxplat_dmi_msn201x_matched(const struct dmi_system_id *dmi)
 	return 1;
 };
 
+static int __init mlxplat_dmi_qmb7xx_matched(const struct dmi_system_id *dmi)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(mlxplat_mux_data); i++) {
+		mlxplat_mux_data[i].values = mlxplat_msn21xx_channels;
+		mlxplat_mux_data[i].n_values =
+				ARRAY_SIZE(mlxplat_msn21xx_channels);
+	}
+	mlxplat_hotplug = &mlxplat_mlxcpld_default_ng_data;
+
+	return 1;
+};
+
 static const struct dmi_system_id mlxplat_dmi_table[] __initconst = {
 	{
 		.callback = mlxplat_dmi_msn274x_matched,
@@ -683,6 +804,27 @@ static const struct dmi_system_id mlxplat_dmi_table[] __initconst = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "MSN201"),
 		},
 	},
+	{
+		.callback = mlxplat_dmi_qmb7xx_matched,
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Mellanox Technologies"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "QMB7"),
+		},
+	},
+	{
+		.callback = mlxplat_dmi_qmb7xx_matched,
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Mellanox Technologies"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "SN37"),
+		},
+	},
+	{
+		.callback = mlxplat_dmi_qmb7xx_matched,
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Mellanox Technologies"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "SN34"),
+		},
+	},
 	{ }
 };
 
-- 
2.1.4

Re: [patch v2 1/3] platform/x86: mlx-platform: Add support for new msn274x system type

[Darren Hart]

On Fri, Feb 09, 2018 at 11:59:30PM +0000, Vadim Pasternak wrote:
> It adds support for new Mellanox system types of basic class msn274x,
> containing system MSN2740 (32x100GbE Ethernet switch with cost reduction)
> and its derivatives. These are the Top of the Rack system, equipped with
> Mellanox Small Form Factor carrier board and switch board with Mellanox
> Spectrum device, which supports Ethernet switching with 32X100G ports line
> rate of up to EDR speed.
> 
> Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>

Hi Vadim,

For timing reasons, I've queued these for review - thanks. A few comments to
make this more smooth in the future:

> v1->v2
>   Comments pointed out by Darren:
>   - Break the patch into series of patches per system type.

Patch changelogs go below the --- line...

> ---

Here. This makes it so the intermediate patch changelog (Since v1... stuff) is
dropped automatically from the commit when using git am to apply the patch. As
these are coming in, I have to apply and then "git rebase -i" to (r)eword each
one individually to prune out the v1->v2 stuff.

For the official description of this process, please see:
Documentation/process/submitting-patches.rst
14) The canonical patch format

>  drivers/platform/x86/mlx-platform.c | 124 ++++++++++++++++++++++++++++++++++++
>  1 file changed, 124 insertions(+)
> 
> diff --git a/drivers/platform/x86/mlx-platform.c b/drivers/platform/x86/mlx-platform.c
> index e87fe34..3a13285 100644
> --- a/drivers/platform/x86/mlx-platform.c
> +++ b/drivers/platform/x86/mlx-platform.c
> @@ -94,6 +94,7 @@
>  /* Hotplug devices adapter numbers */
>  #define MLXPLAT_CPLD_NR_NONE			-1
>  #define MLXPLAT_CPLD_PSU_DEFAULT_NR		10
> +#define MLXPLAT_CPLD_PSU_MSNXXXX_NR		4
>  #define MLXPLAT_CPLD_FAN1_DEFAULT_NR		11
>  #define MLXPLAT_CPLD_FAN2_DEFAULT_NR		12
>  #define MLXPLAT_CPLD_FAN3_DEFAULT_NR		13
> @@ -335,6 +336,108 @@ struct mlxreg_core_hotplug_platform_data mlxplat_mlxcpld_msn21xx_data = {
>  	.mask_low = MLXPLAT_CPLD_LOW_AGGR_MASK_LOW,
>  };
>  
> +/* Platform hotplug msn274x system family data */
> +static struct mlxreg_core_data mlxplat_mlxcpld_msn274x_psu_items_data[] = {
> +	{
> +		.label = "psu1",
> +		.reg = MLXPLAT_CPLD_LPC_REG_PSU_OFFSET,
> +		.mask = BIT(0),
> +		.hpdev.brdinfo = &mlxplat_mlxcpld_psu[0],
> +		.hpdev.nr = MLXPLAT_CPLD_PSU_MSNXXXX_NR,
> +	},
> +	{
> +		.label = "psu2",
> +		.reg = MLXPLAT_CPLD_LPC_REG_PSU_OFFSET,
> +		.mask = BIT(1),
> +		.hpdev.brdinfo = &mlxplat_mlxcpld_psu[1],
> +		.hpdev.nr = MLXPLAT_CPLD_PSU_MSNXXXX_NR,
> +	},
> +};
> +
> +static struct mlxreg_core_data mlxplat_mlxcpld_default_ng_pwr_items_data[] = {

This is OK as is, but in terms of helping articulate what I'm looking for with
respect to breaking up patches into atomic functional patches, the
"*default_ng*" structs are something that may have been better off in their own
patch. Here's why.

Let's say something turned out to be bad with this (1/3) patch. If I were to
revert it, I would break everything that was dependent on the
...default_ng_pwr... struct. The idea is to remove as many interdependencies as
possible and to make each patch as self contained as possible. This makes them
easier to review as well as easier to use in a patch-granular way for stable,
distro, and future mainline debug and maintenance work.

No need to resend, the risk is minimal here and these are highly contained to
just the one file. Something to apply to future work.

Thanks!
-- 
Darren Hart
VMware Open Source Technology Center