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Date:   Tue,  5 Sep 2017 14:28:26 +0000
From:   Vadim Pasternak <vadimp@...lanox.com>
To:     gregkh@...uxfoundation.org, andy.shevchenko@...il.com
Cc:     linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        linux-leds@...r.kernel.org, jacek.anaszewski@...il.com,
        lee.jones@...aro.org, robh+dt@...nel.org, jiri@...nulli.us,
        pavel@....cz, Vadim Pasternak <vadimp@...lanox.com>
Subject: [patch v2 2/3] platform/x86: mlx-platform: modify hotplug device activation

It modifies mlx-platform driver hotplug interface. Instead driver
mlxcpld-hotplug, which is to be removed, mlx-platform will use more
generic architecture independent and regmap based mlxreg-hotplug
driver.

Signed-off-by: Vadim Pasternak <vadimp@...lanox.com>
Acked-by: Andy Shevchenko <andy.shevchenko@...il.com>
---
 drivers/platform/x86/Kconfig        |   9 --
 drivers/platform/x86/Makefile       |   1 -
 drivers/platform/x86/mlx-platform.c | 225 +++++++++++++++++++++++++++---------
 3 files changed, 172 insertions(+), 63 deletions(-)

diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 80b8795..ae6043a 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -1109,15 +1109,6 @@ config MLX_PLATFORM
 
 	  If you have a Mellanox system, say Y or M here.
 
-config MLX_CPLD_PLATFORM
-	tristate "Mellanox platform hotplug driver support"
-	default n
-	select HWMON
-	select I2C
-	---help---
-	  This driver handles hot-plug events for the power suppliers, power
-	  cables and fans on the wide range Mellanox IB and Ethernet systems.
-
 config INTEL_TURBO_MAX_3
 	bool "Intel Turbo Boost Max Technology 3.0 enumeration driver"
 	depends on X86_64 && SCHED_MC_PRIO
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index 91cec17..c2c1c06 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -81,5 +81,4 @@ obj-$(CONFIG_INTEL_TELEMETRY)	+= intel_telemetry_core.o \
 obj-$(CONFIG_INTEL_PMC_CORE)    += intel_pmc_core.o
 obj-$(CONFIG_PMC_ATOM)		+= pmc_atom.o
 obj-$(CONFIG_MLX_PLATFORM)	+= mlx-platform.o
-obj-$(CONFIG_MLX_CPLD_PLATFORM)	+= mlxcpld-hotplug.o
 obj-$(CONFIG_INTEL_TURBO_MAX_3) += intel_turbo_max_3.o
diff --git a/drivers/platform/x86/mlx-platform.c b/drivers/platform/x86/mlx-platform.c
index 8f98c21..fa21a3c 100644
--- a/drivers/platform/x86/mlx-platform.c
+++ b/drivers/platform/x86/mlx-platform.c
@@ -35,20 +35,22 @@
 #include <linux/dmi.h>
 #include <linux/i2c.h>
 #include <linux/i2c-mux.h>
+#include <linux/io.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/platform_data/i2c-mux-reg.h>
-#include <linux/platform_data/mlxcpld-hotplug.h>
+#include <linux/platform_data/mlxreg.h>
+#include <linux/regmap.h>
 
 #define MLX_PLAT_DEVICE_NAME		"mlxplat"
 
 /* LPC bus IO offsets */
 #define MLXPLAT_CPLD_LPC_I2C_BASE_ADRR		0x2000
 #define MLXPLAT_CPLD_LPC_REG_BASE_ADRR		0x2500
-#define MLXPLAT_CPLD_LPC_REG_AGGR_ADRR		0x253a
-#define MLXPLAT_CPLD_LPC_REG_PSU_ADRR		0x2558
-#define MLXPLAT_CPLD_LPC_REG_PWR_ADRR		0x2564
-#define MLXPLAT_CPLD_LPC_REG_FAN_ADRR		0x2588
+#define MLXPLAT_CPLD_LPC_REG_AGGR_ADRR		0x3a
+#define MLXPLAT_CPLD_LPC_REG_PSU_ADRR		0x58
+#define MLXPLAT_CPLD_LPC_REG_PWR_ADRR		0x64
+#define MLXPLAT_CPLD_LPC_REG_FAN_ADRR		0x88
 #define MLXPLAT_CPLD_LPC_IO_RANGE		0x100
 #define MLXPLAT_CPLD_LPC_I2C_CH1_OFF		0xdb
 #define MLXPLAT_CPLD_LPC_I2C_CH2_OFF		0xda
@@ -138,86 +140,192 @@ static struct i2c_mux_reg_platform_data mlxplat_mux_data[] = {
 };
 
 /* Platform hotplug devices */
-static struct mlxcpld_hotplug_device mlxplat_mlxcpld_psu[] = {
+static struct i2c_board_info mlxplat_mlxcpld_psu[] = {
 	{
-		.brdinfo = { I2C_BOARD_INFO("24c02", 0x51) },
-		.bus = 10,
+		I2C_BOARD_INFO("24c02", 0x51),
 	},
 	{
-		.brdinfo = { I2C_BOARD_INFO("24c02", 0x50) },
-		.bus = 10,
+		I2C_BOARD_INFO("24c02", 0x50),
 	},
 };
 
-static struct mlxcpld_hotplug_device mlxplat_mlxcpld_pwr[] = {
+static struct i2c_board_info mlxplat_mlxcpld_pwr[] = {
 	{
-		.brdinfo = { I2C_BOARD_INFO("dps460", 0x59) },
-		.bus = 10,
+		I2C_BOARD_INFO("dps460", 0x59),
 	},
 	{
-		.brdinfo = { I2C_BOARD_INFO("dps460", 0x58) },
-		.bus = 10,
+		I2C_BOARD_INFO("dps460", 0x58),
 	},
 };
 
-static struct mlxcpld_hotplug_device mlxplat_mlxcpld_fan[] = {
+static struct i2c_board_info mlxplat_mlxcpld_fan[] = {
 	{
-		.brdinfo = { I2C_BOARD_INFO("24c32", 0x50) },
-		.bus = 11,
+		I2C_BOARD_INFO("24c32", 0x50),
 	},
 	{
-		.brdinfo = { I2C_BOARD_INFO("24c32", 0x50) },
-		.bus = 12,
+		I2C_BOARD_INFO("24c32", 0x50),
 	},
 	{
-		.brdinfo = { I2C_BOARD_INFO("24c32", 0x50) },
-		.bus = 13,
+		I2C_BOARD_INFO("24c32", 0x50),
 	},
 	{
-		.brdinfo = { I2C_BOARD_INFO("24c32", 0x50) },
-		.bus = 14,
+		I2C_BOARD_INFO("24c32", 0x50),
 	},
 };
 
 /* Platform hotplug default data */
+static struct mlxreg_core_data mlxplat_mlxcpld_default_psu_items_data[] = {
+	{
+		.label = "psu1",
+		.reg = MLXPLAT_CPLD_LPC_REG_PSU_ADRR,
+		.mask = BIT(0),
+		.hpdev.brdinfo = &mlxplat_mlxcpld_psu[0],
+		.hpdev.nr = 10,
+	},
+	{
+		.label = "psu2",
+		.reg = MLXPLAT_CPLD_LPC_REG_PSU_ADRR,
+		.mask = BIT(1),
+		.hpdev.brdinfo = &mlxplat_mlxcpld_psu[1],
+		.hpdev.nr = 10,
+	},
+};
+
+static struct mlxreg_core_data mlxplat_mlxcpld_default_pwr_items_data[] = {
+	{
+		.label = "pwr1",
+		.reg = MLXPLAT_CPLD_LPC_REG_PWR_ADRR,
+		.mask = BIT(0),
+		.hpdev.brdinfo = &mlxplat_mlxcpld_pwr[0],
+		.hpdev.nr = 10,
+	},
+	{
+		.label = "pwr2",
+		.reg = MLXPLAT_CPLD_LPC_REG_PWR_ADRR,
+		.mask = BIT(1),
+		.hpdev.brdinfo = &mlxplat_mlxcpld_pwr[1],
+		.hpdev.nr = 10,
+	},
+};
+
+static struct mlxreg_core_data mlxplat_mlxcpld_default_fan_items_data[] = {
+	{
+		.label = "fan1",
+		.reg = MLXPLAT_CPLD_LPC_REG_FAN_ADRR,
+		.mask = BIT(0),
+		.hpdev.brdinfo = &mlxplat_mlxcpld_fan[0],
+		.hpdev.nr = 11,
+	},
+	{
+		.label = "fan2",
+		.reg = MLXPLAT_CPLD_LPC_REG_FAN_ADRR,
+		.mask = BIT(1),
+		.hpdev.brdinfo = &mlxplat_mlxcpld_fan[1],
+		.hpdev.nr = 12,
+	},
+	{
+		.label = "fan3",
+		.reg = MLXPLAT_CPLD_LPC_REG_FAN_ADRR,
+		.mask = BIT(2),
+		.hpdev.brdinfo = &mlxplat_mlxcpld_fan[2],
+		.hpdev.nr = 13,
+	},
+	{
+		.label = "fan4",
+		.reg = MLXPLAT_CPLD_LPC_REG_FAN_ADRR,
+		.mask = BIT(3),
+		.hpdev.brdinfo = &mlxplat_mlxcpld_fan[3],
+		.hpdev.nr = 14,
+	},
+};
+
+static struct mlxreg_core_item mlxplat_mlxcpld_default_items[] = {
+	{
+		.data = mlxplat_mlxcpld_default_psu_items_data,
+		.aggr_mask = MLXPLAT_CPLD_AGGR_PSU_MASK_DEF,
+		.reg = MLXPLAT_CPLD_LPC_REG_PSU_ADRR,
+		.mask = MLXPLAT_CPLD_PSU_MASK,
+		.count = ARRAY_SIZE(mlxplat_mlxcpld_psu),
+		.inversed = 1,
+		.health = false,
+	},
+	{
+		.data = mlxplat_mlxcpld_default_pwr_items_data,
+		.aggr_mask = MLXPLAT_CPLD_AGGR_PWR_MASK_DEF,
+		.reg = MLXPLAT_CPLD_LPC_REG_PWR_ADRR,
+		.mask = MLXPLAT_CPLD_PWR_MASK,
+		.count = ARRAY_SIZE(mlxplat_mlxcpld_pwr),
+		.inversed = 0,
+		.health = false,
+	},
+	{
+		.data = mlxplat_mlxcpld_default_fan_items_data,
+		.aggr_mask = MLXPLAT_CPLD_AGGR_FAN_MASK_DEF,
+		.reg = MLXPLAT_CPLD_LPC_REG_FAN_ADRR,
+		.mask = MLXPLAT_CPLD_FAN_MASK,
+		.count = ARRAY_SIZE(mlxplat_mlxcpld_fan),
+		.inversed = 1,
+		.health = false,
+	},
+};
+
 static
-struct mlxcpld_hotplug_platform_data mlxplat_mlxcpld_default_data = {
-	.top_aggr_offset = MLXPLAT_CPLD_LPC_REG_AGGR_ADRR,
-	.top_aggr_mask = MLXPLAT_CPLD_AGGR_MASK_DEF,
-	.top_aggr_psu_mask = MLXPLAT_CPLD_AGGR_PSU_MASK_DEF,
-	.psu_reg_offset = MLXPLAT_CPLD_LPC_REG_PSU_ADRR,
-	.psu_mask = MLXPLAT_CPLD_PSU_MASK,
-	.psu_count = ARRAY_SIZE(mlxplat_mlxcpld_psu),
-	.psu = mlxplat_mlxcpld_psu,
-	.top_aggr_pwr_mask = MLXPLAT_CPLD_AGGR_PWR_MASK_DEF,
-	.pwr_reg_offset = MLXPLAT_CPLD_LPC_REG_PWR_ADRR,
-	.pwr_mask = MLXPLAT_CPLD_PWR_MASK,
-	.pwr_count = ARRAY_SIZE(mlxplat_mlxcpld_pwr),
-	.pwr = mlxplat_mlxcpld_pwr,
-	.top_aggr_fan_mask = MLXPLAT_CPLD_AGGR_FAN_MASK_DEF,
-	.fan_reg_offset = MLXPLAT_CPLD_LPC_REG_FAN_ADRR,
-	.fan_mask = MLXPLAT_CPLD_FAN_MASK,
-	.fan_count = ARRAY_SIZE(mlxplat_mlxcpld_fan),
-	.fan = mlxplat_mlxcpld_fan,
+struct mlxreg_core_hotplug_platform_data mlxplat_mlxcpld_default_data = {
+	.items = mlxplat_mlxcpld_default_items,
+	.counter = ARRAY_SIZE(mlxplat_mlxcpld_default_items),
+	.cell = MLXPLAT_CPLD_LPC_REG_AGGR_ADRR,
+	.mask = MLXPLAT_CPLD_AGGR_MASK_DEF,
 };
 
 /* Platform hotplug MSN21xx system family data */
+static struct mlxreg_core_item mlxplat_mlxcpld_msn21xx_items[] = {
+	{
+		.data = mlxplat_mlxcpld_default_pwr_items_data,
+		.aggr_mask = MLXPLAT_CPLD_AGGR_PWR_MASK_DEF,
+		.reg = MLXPLAT_CPLD_LPC_REG_PWR_ADRR,
+		.mask = MLXPLAT_CPLD_PWR_MASK,
+		.count = ARRAY_SIZE(mlxplat_mlxcpld_pwr),
+		.inversed = 0,
+		.health = false,
+	},
+};
+
 static
-struct mlxcpld_hotplug_platform_data mlxplat_mlxcpld_msn21xx_data = {
-	.top_aggr_offset = MLXPLAT_CPLD_LPC_REG_AGGR_ADRR,
-	.top_aggr_mask = MLXPLAT_CPLD_AGGR_MASK_MSN21XX,
-	.top_aggr_pwr_mask = MLXPLAT_CPLD_AGGR_MASK_MSN21XX,
-	.pwr_reg_offset = MLXPLAT_CPLD_LPC_REG_PWR_ADRR,
-	.pwr_mask = MLXPLAT_CPLD_PWR_MASK,
-	.pwr_count = ARRAY_SIZE(mlxplat_mlxcpld_pwr),
+struct mlxreg_core_hotplug_platform_data mlxplat_mlxcpld_msn21xx_data = {
+	.items = mlxplat_mlxcpld_msn21xx_items,
+	.counter = ARRAY_SIZE(mlxplat_mlxcpld_msn21xx_items),
+	.cell = MLXPLAT_CPLD_LPC_REG_AGGR_ADRR,
+	.mask = MLXPLAT_CPLD_AGGR_MASK_DEF,
+};
+
+static int
+mlxplat_mlxcpld_reg_read(void *context, unsigned int reg, unsigned int *val)
+{
+	*val = ioread8(context + reg);
+	return 0;
+}
+
+static int
+mlxplat_mlxcpld_reg_write(void *context, unsigned int reg, unsigned int val)
+{
+	iowrite8(val, context + reg);
+	return 0;
+}
+
+const struct regmap_config mlxplat_mlxcpld_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = 255,
+	.reg_read = mlxplat_mlxcpld_reg_read,
+	.reg_write = mlxplat_mlxcpld_reg_write,
 };
 
 static struct resource mlxplat_mlxcpld_resources[] = {
-	[0] = DEFINE_RES_IRQ_NAMED(17, "mlxcpld-hotplug"),
+	[0] = DEFINE_RES_IRQ_NAMED(17, "mlxreg-hotplug"),
 };
 
 struct platform_device *mlxplat_dev;
-struct mlxcpld_hotplug_platform_data *mlxplat_hotplug;
+struct mlxreg_core_hotplug_platform_data *mlxplat_hotplug;
 
 static int __init mlxplat_dmi_default_matched(const struct dmi_system_id *dmi)
 {
@@ -289,7 +397,8 @@ static struct dmi_system_id mlxplat_dmi_table[] __initdata = {
 static int __init mlxplat_init(void)
 {
 	struct mlxplat_priv *priv;
-	int i, err;
+	void __iomem *base;
+	int i, err = 0;
 
 	if (!dmi_check_system(mlxplat_dmi_table))
 		return -ENODEV;
@@ -328,8 +437,18 @@ static int __init mlxplat_init(void)
 		}
 	}
 
+	base = devm_ioport_map(&mlxplat_dev->dev,
+			       mlxplat_lpc_resources[1].start, 1);
+	if (IS_ERR(base))
+		goto fail_platform_mux_register;
+
+	mlxplat_hotplug->regmap = devm_regmap_init(&mlxplat_dev->dev, NULL,
+					base, &mlxplat_mlxcpld_regmap_config);
+	if (IS_ERR(mlxplat_hotplug->regmap))
+		goto fail_platform_mux_register;
+
 	priv->pdev_hotplug = platform_device_register_resndata(
-				&mlxplat_dev->dev, "mlxcpld-hotplug",
+				&mlxplat_dev->dev, "mlxreg-hotplug",
 				PLATFORM_DEVID_NONE,
 				mlxplat_mlxcpld_resources,
 				ARRAY_SIZE(mlxplat_mlxcpld_resources),
-- 
2.1.4

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