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* [PATCH v2 0/2] add i2c controlled qixis driver
@ 2019-01-30 11:34 ` Pankaj Bansal
  0 siblings, 0 replies; 6+ messages in thread
From: Pankaj Bansal @ 2019-01-30 11:34 UTC (permalink / raw)
  To: Leo Li; +Cc: Pankaj Bansal, linuxppc-dev, Varun Sethi, linux-arm-kernel

FPGA on LX2160AQDS/LX2160ARDB connected on I2C bus, so add qixis
driver which is basically an i2c client driver to control FPGA.

This driver is essential to control MDIO mux multiplexing.

This driver is dependent on below patches:
https://www.mail-archive.com/netdev@vger.kernel.org/msg281274.html

V1 of this series:
https://patchwork.kernel.org/cover/10627297/

Cc: Varun Sethi <V.Sethi@nxp.com>

Pankaj Bansal (2):
  dt-bindings: soc: fsl: Document Qixis FPGA usage
  fsl: add i2c controlled qixis driver

 .../bindings/soc/fsl/qixis_ctrl.txt           |  33 +++++
 drivers/soc/fsl/Kconfig                       |   8 ++
 drivers/soc/fsl/Makefile                      |   1 +
 drivers/soc/fsl/qixis_ctrl.c                  | 121 ++++++++++++++++++
 4 files changed, 163 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/soc/fsl/qixis_ctrl.txt
 create mode 100644 drivers/soc/fsl/qixis_ctrl.c

-- 
2.17.1


^ permalink raw reply	[flat|nested] 6+ messages in thread
* [PATCH v2 0/2] add i2c controlled qixis driver
@ 2019-01-30 11:34 ` Pankaj Bansal
  0 siblings, 0 replies; 6+ messages in thread
From: Pankaj Bansal @ 2019-01-30 11:34 UTC (permalink / raw)
  To: Leo Li; +Cc: Pankaj Bansal, linuxppc-dev, Varun Sethi, linux-arm-kernel

FPGA on LX2160AQDS/LX2160ARDB connected on I2C bus, so add qixis
driver which is basically an i2c client driver to control FPGA.

This driver is essential to control MDIO mux multiplexing.

This driver is dependent on below patches:
https://www.mail-archive.com/netdev@vger.kernel.org/msg281274.html

V1 of this series:
https://patchwork.kernel.org/cover/10627297/

Cc: Varun Sethi <V.Sethi@nxp.com>

Pankaj Bansal (2):
  dt-bindings: soc: fsl: Document Qixis FPGA usage
  fsl: add i2c controlled qixis driver

 .../bindings/soc/fsl/qixis_ctrl.txt           |  33 +++++
 drivers/soc/fsl/Kconfig                       |   8 ++
 drivers/soc/fsl/Makefile                      |   1 +
 drivers/soc/fsl/qixis_ctrl.c                  | 121 ++++++++++++++++++
 4 files changed, 163 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/soc/fsl/qixis_ctrl.txt
 create mode 100644 drivers/soc/fsl/qixis_ctrl.c

-- 
2.17.1

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 6+ messages in thread
* [PATCH v2 1/2] dt-bindings: soc: fsl: Document Qixis FPGA usage
  2019-01-30 11:34 ` Pankaj Bansal
@ 2019-01-30 11:34   ` Pankaj Bansal
  -1 siblings, 0 replies; 6+ messages in thread
From: Pankaj Bansal @ 2019-01-30 11:34 UTC (permalink / raw)
  To: Leo Li; +Cc: Pankaj Bansal, linuxppc-dev, linux-arm-kernel

an FPGA-based system controller, called “Qixis”, which
manages several critical system features, including:
• Reset sequencing
• Power supply configuration
• Board configuration
• hardware configuration

The qixis registers are accessible over one or more system-specific
interfaces, typically I2C, JTAG or an embedded processor.

Signed-off-by: Pankaj Bansal <pankaj.bansal@nxp.com>
---

Notes:
    V2:
    - No change

 .../bindings/soc/fsl/qixis_ctrl.txt          | 33 ++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/Documentation/devicetree/bindings/soc/fsl/qixis_ctrl.txt b/Documentation/devicetree/bindings/soc/fsl/qixis_ctrl.txt
new file mode 100644
index 000000000000..bc2950cab71d
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/fsl/qixis_ctrl.txt
@@ -0,0 +1,33 @@
+* QIXIS FPGA block
+
+an FPGA-based system controller, called “Qixis”, which
+manages several critical system features, including:
+• Configuration switch monitoring
+• Power on/off sequencing
+• Reset sequencing
+• Power supply configuration
+• Board configuration
+• hardware configuration
+• Background power data collection (DCM)
+• Fault monitoring
+• RCW bypass SRAM (replace flash RCW with internal RCW) (NOR only)
+• Dedicated functional validation blocks (POSt/IRS, triggered event, and so on)
+• I2C master for remote board control even with no DUT available
+
+The qixis registers are accessible over one or more system-specific interfaces,
+typically I2C, JTAG or an embedded processor.
+
+Required properties:
+
+ - compatible : string, must contain "fsl,fpga-qixis-i2c"
+ - reg : i2c address of the qixis device.
+
+Examples:
+	/* The FPGA node */
+        fpga@66 {
+		compatible = "fsl,lx2160aqds-fpga", "fsl,fpga-qixis-i2c";
+		reg = <0x66>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+	}
+
-- 
2.17.1


^ permalink raw reply related	[flat|nested] 6+ messages in thread
* [PATCH v2 1/2] dt-bindings: soc: fsl: Document Qixis FPGA usage
@ 2019-01-30 11:34   ` Pankaj Bansal
  0 siblings, 0 replies; 6+ messages in thread
From: Pankaj Bansal @ 2019-01-30 11:34 UTC (permalink / raw)
  To: Leo Li; +Cc: Pankaj Bansal, linuxppc-dev, linux-arm-kernel

an FPGA-based system controller, called “Qixis”, which
manages several critical system features, including:
• Reset sequencing
• Power supply configuration
• Board configuration
• hardware configuration

The qixis registers are accessible over one or more system-specific
interfaces, typically I2C, JTAG or an embedded processor.

Signed-off-by: Pankaj Bansal <pankaj.bansal@nxp.com>
---

Notes:
    V2:
    - No change

 .../bindings/soc/fsl/qixis_ctrl.txt          | 33 ++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/Documentation/devicetree/bindings/soc/fsl/qixis_ctrl.txt b/Documentation/devicetree/bindings/soc/fsl/qixis_ctrl.txt
new file mode 100644
index 000000000000..bc2950cab71d
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/fsl/qixis_ctrl.txt
@@ -0,0 +1,33 @@
+* QIXIS FPGA block
+
+an FPGA-based system controller, called “Qixis”, which
+manages several critical system features, including:
+• Configuration switch monitoring
+• Power on/off sequencing
+• Reset sequencing
+• Power supply configuration
+• Board configuration
+• hardware configuration
+• Background power data collection (DCM)
+• Fault monitoring
+• RCW bypass SRAM (replace flash RCW with internal RCW) (NOR only)
+• Dedicated functional validation blocks (POSt/IRS, triggered event, and so on)
+• I2C master for remote board control even with no DUT available
+
+The qixis registers are accessible over one or more system-specific interfaces,
+typically I2C, JTAG or an embedded processor.
+
+Required properties:
+
+ - compatible : string, must contain "fsl,fpga-qixis-i2c"
+ - reg : i2c address of the qixis device.
+
+Examples:
+	/* The FPGA node */
+        fpga@66 {
+		compatible = "fsl,lx2160aqds-fpga", "fsl,fpga-qixis-i2c";
+		reg = <0x66>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+	}
+
-- 
2.17.1

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply related	[flat|nested] 6+ messages in thread
* [PATCH v2 2/2] fsl: add i2c controlled qixis driver
  2019-01-30 11:34 ` Pankaj Bansal
@ 2019-01-30 11:34   ` Pankaj Bansal
  -1 siblings, 0 replies; 6+ messages in thread
From: Pankaj Bansal @ 2019-01-30 11:34 UTC (permalink / raw)
  To: Leo Li; +Cc: Pankaj Bansal, linuxppc-dev, Wang Dongsheng, linux-arm-kernel

FPGA on LX2160AQDS/LX2160ARDB connected on I2C bus, so add qixis
driver which is basically an i2c client driver to control FPGA.

Signed-off-by: Wang Dongsheng <dongsheng.wang@freescale.com>
Signed-off-by: Pankaj Bansal <pankaj.bansal@nxp.com>
---

Notes:
    V2:
    - Modify the driver to not create platform devices corresponding to subnodes.
      because the subnodes are not actual devices.
    - Use mdio_mux_regmap_init/mdio_mux_regmap_uninit
    - Remove header file from include folder, as no qixis api is called from outside
    - Add regmap_exit in driver's remove function
    Dendencies:
	- https://www.mail-archive.com/netdev@vger.kernel.org/msg281274.html

 drivers/soc/fsl/Kconfig      |   8 +++
 drivers/soc/fsl/Makefile     |   1 +
 drivers/soc/fsl/qixis_ctrl.c | 121 +++++++++++++++++++++++++++++++++
 3 files changed, 130 insertions(+)

diff --git a/drivers/soc/fsl/Kconfig b/drivers/soc/fsl/Kconfig
index 8a0ba6da6f8a..e787d3e637a4 100644
--- a/drivers/soc/fsl/Kconfig
+++ b/drivers/soc/fsl/Kconfig
@@ -36,6 +36,14 @@ config FSL_SLEEP_FSM
 	  The FSM is used to finish clean-ups at the last stage of system entering deep
 	  sleep, and also wakes up system when a wake up event happens.
 
+config FSL_QIXIS
+	tristate "QIXIS system controller driver"
+	depends on REGMAP_I2C
+	default n
+	help
+	  Say y here to enable QIXIS system controller api. The qixis driver
+	  provides FPGA functions to control system.
+
 if ARM || ARM64
 source "drivers/soc/fsl/Kconfig.arm"
 endif
diff --git a/drivers/soc/fsl/Makefile b/drivers/soc/fsl/Makefile
index ffdf93b34501..db7b09bfbd91 100644
--- a/drivers/soc/fsl/Makefile
+++ b/drivers/soc/fsl/Makefile
@@ -5,6 +5,7 @@
 obj-$(CONFIG_FSL_DPAA)                 += qbman/
 obj-$(CONFIG_QUICC_ENGINE)		+= qe/
 obj-$(CONFIG_CPM)			+= qe/
+obj-$(CONFIG_FSL_QIXIS) 		+= qixis_ctrl.o
 obj-$(CONFIG_FSL_GUTS)			+= guts.o
 obj-$(CONFIG_FSL_MC_DPIO) 		+= dpio/
 obj-$(CONFIG_FSL_LS2_CONSOLE)		+= ls2-console/
diff --git a/drivers/soc/fsl/qixis_ctrl.c b/drivers/soc/fsl/qixis_ctrl.c
new file mode 100644
index 000000000000..336f366e228e
--- /dev/null
+++ b/drivers/soc/fsl/qixis_ctrl.c
@@ -0,0 +1,121 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/* Freescale QIXIS system controller driver.
+ *
+ * Copyright 2015 Freescale Semiconductor, Inc.
+ * Copyright 2018 NXP
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/mdio-mux.h>
+
+/* QIXIS MAP */
+struct fsl_qixis_regs {
+	u8		id;		/* Identification Registers */
+	u8		version;	/* Version Register */
+	u8		qixis_ver;	/* QIXIS Version Register */
+	u8		reserved1[0x1f];
+};
+
+struct mdio_mux_data {
+	void			*data;
+	struct list_head	link;
+};
+
+struct qixis_priv {
+	struct regmap		*regmap;
+	struct list_head	mdio_mux_list;
+};
+
+static struct regmap_config qixis_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+};
+
+static int fsl_qixis_i2c_probe(struct i2c_client *client)
+{
+	struct device_node *child;
+	struct qixis_priv *priv;
+	int ret;
+	u32 qver;
+	struct mdio_mux_data *mux_data;
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+		return -EOPNOTSUPP;
+
+	priv = devm_kzalloc(&client->dev, sizeof(struct qixis_priv),
+			    GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->regmap = regmap_init_i2c(client, &qixis_regmap_config);
+	INIT_LIST_HEAD(&priv->mdio_mux_list);
+
+	regmap_read(priv->regmap, offsetof(struct fsl_qixis_regs, qixis_ver),
+		    &qver);
+	pr_info("Freescale QIXIS Version: 0x%08x\n", qver);
+
+	for_each_child_of_node(client->dev.of_node, child) {
+		if (of_node_name_prefix(child, "mdio-mux")) {
+			mux_data = devm_kzalloc(&client->dev,
+						sizeof(struct mdio_mux_data),
+						GFP_KERNEL);
+			if (!mux_data)
+				return -ENOMEM;
+			ret = mdio_mux_regmap_init(&client->dev, child,
+						   &mux_data->data);
+			if (ret)
+				return ret;
+			list_add(&mux_data->link, &priv->mdio_mux_list);
+		}
+	};
+
+	i2c_set_clientdata(client, priv);
+
+	return 0;
+}
+
+static int fsl_qixis_i2c_remove(struct i2c_client *client)
+{
+	struct qixis_priv *priv;
+	struct list_head *pos;
+	struct mdio_mux_data *mux_data;
+
+	priv = i2c_get_clientdata(client);
+	list_for_each(pos, &priv->mdio_mux_list) {
+		mux_data = list_entry(pos, struct mdio_mux_data, link);
+		mdio_mux_regmap_uninit(mux_data->data);
+	}
+	regmap_exit(priv->regmap);
+
+	return 0;
+}
+
+static const struct of_device_id fsl_qixis_of_match[] = {
+	{ .compatible = "fsl,fpga-qixis-i2c" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, fsl_qixis_of_match);
+
+static struct i2c_driver fsl_qixis_i2c_driver = {
+	.driver = {
+		.name	= "qixis_ctrl",
+		.owner	= THIS_MODULE,
+		.of_match_table = of_match_ptr(fsl_qixis_of_match),
+	},
+	.probe_new	= fsl_qixis_i2c_probe,
+	.remove		= fsl_qixis_i2c_remove,
+};
+module_i2c_driver(fsl_qixis_i2c_driver);
+
+MODULE_AUTHOR("Wang Dongsheng <dongsheng.wang@freescale.com>");
+MODULE_DESCRIPTION("Freescale QIXIS system controller driver");
+MODULE_LICENSE("GPL v2");
-- 
2.17.1


^ permalink raw reply related	[flat|nested] 6+ messages in thread
* [PATCH v2 2/2] fsl: add i2c controlled qixis driver
@ 2019-01-30 11:34   ` Pankaj Bansal
  0 siblings, 0 replies; 6+ messages in thread
From: Pankaj Bansal @ 2019-01-30 11:34 UTC (permalink / raw)
  To: Leo Li; +Cc: Pankaj Bansal, linuxppc-dev, Wang Dongsheng, linux-arm-kernel

FPGA on LX2160AQDS/LX2160ARDB connected on I2C bus, so add qixis
driver which is basically an i2c client driver to control FPGA.

Signed-off-by: Wang Dongsheng <dongsheng.wang@freescale.com>
Signed-off-by: Pankaj Bansal <pankaj.bansal@nxp.com>
---

Notes:
    V2:
    - Modify the driver to not create platform devices corresponding to subnodes.
      because the subnodes are not actual devices.
    - Use mdio_mux_regmap_init/mdio_mux_regmap_uninit
    - Remove header file from include folder, as no qixis api is called from outside
    - Add regmap_exit in driver's remove function
    Dendencies:
	- https://www.mail-archive.com/netdev@vger.kernel.org/msg281274.html

 drivers/soc/fsl/Kconfig      |   8 +++
 drivers/soc/fsl/Makefile     |   1 +
 drivers/soc/fsl/qixis_ctrl.c | 121 +++++++++++++++++++++++++++++++++
 3 files changed, 130 insertions(+)

diff --git a/drivers/soc/fsl/Kconfig b/drivers/soc/fsl/Kconfig
index 8a0ba6da6f8a..e787d3e637a4 100644
--- a/drivers/soc/fsl/Kconfig
+++ b/drivers/soc/fsl/Kconfig
@@ -36,6 +36,14 @@ config FSL_SLEEP_FSM
 	  The FSM is used to finish clean-ups at the last stage of system entering deep
 	  sleep, and also wakes up system when a wake up event happens.
 
+config FSL_QIXIS
+	tristate "QIXIS system controller driver"
+	depends on REGMAP_I2C
+	default n
+	help
+	  Say y here to enable QIXIS system controller api. The qixis driver
+	  provides FPGA functions to control system.
+
 if ARM || ARM64
 source "drivers/soc/fsl/Kconfig.arm"
 endif
diff --git a/drivers/soc/fsl/Makefile b/drivers/soc/fsl/Makefile
index ffdf93b34501..db7b09bfbd91 100644
--- a/drivers/soc/fsl/Makefile
+++ b/drivers/soc/fsl/Makefile
@@ -5,6 +5,7 @@
 obj-$(CONFIG_FSL_DPAA)                 += qbman/
 obj-$(CONFIG_QUICC_ENGINE)		+= qe/
 obj-$(CONFIG_CPM)			+= qe/
+obj-$(CONFIG_FSL_QIXIS) 		+= qixis_ctrl.o
 obj-$(CONFIG_FSL_GUTS)			+= guts.o
 obj-$(CONFIG_FSL_MC_DPIO) 		+= dpio/
 obj-$(CONFIG_FSL_LS2_CONSOLE)		+= ls2-console/
diff --git a/drivers/soc/fsl/qixis_ctrl.c b/drivers/soc/fsl/qixis_ctrl.c
new file mode 100644
index 000000000000..336f366e228e
--- /dev/null
+++ b/drivers/soc/fsl/qixis_ctrl.c
@@ -0,0 +1,121 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/* Freescale QIXIS system controller driver.
+ *
+ * Copyright 2015 Freescale Semiconductor, Inc.
+ * Copyright 2018 NXP
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/mdio-mux.h>
+
+/* QIXIS MAP */
+struct fsl_qixis_regs {
+	u8		id;		/* Identification Registers */
+	u8		version;	/* Version Register */
+	u8		qixis_ver;	/* QIXIS Version Register */
+	u8		reserved1[0x1f];
+};
+
+struct mdio_mux_data {
+	void			*data;
+	struct list_head	link;
+};
+
+struct qixis_priv {
+	struct regmap		*regmap;
+	struct list_head	mdio_mux_list;
+};
+
+static struct regmap_config qixis_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+};
+
+static int fsl_qixis_i2c_probe(struct i2c_client *client)
+{
+	struct device_node *child;
+	struct qixis_priv *priv;
+	int ret;
+	u32 qver;
+	struct mdio_mux_data *mux_data;
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+		return -EOPNOTSUPP;
+
+	priv = devm_kzalloc(&client->dev, sizeof(struct qixis_priv),
+			    GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->regmap = regmap_init_i2c(client, &qixis_regmap_config);
+	INIT_LIST_HEAD(&priv->mdio_mux_list);
+
+	regmap_read(priv->regmap, offsetof(struct fsl_qixis_regs, qixis_ver),
+		    &qver);
+	pr_info("Freescale QIXIS Version: 0x%08x\n", qver);
+
+	for_each_child_of_node(client->dev.of_node, child) {
+		if (of_node_name_prefix(child, "mdio-mux")) {
+			mux_data = devm_kzalloc(&client->dev,
+						sizeof(struct mdio_mux_data),
+						GFP_KERNEL);
+			if (!mux_data)
+				return -ENOMEM;
+			ret = mdio_mux_regmap_init(&client->dev, child,
+						   &mux_data->data);
+			if (ret)
+				return ret;
+			list_add(&mux_data->link, &priv->mdio_mux_list);
+		}
+	};
+
+	i2c_set_clientdata(client, priv);
+
+	return 0;
+}
+
+static int fsl_qixis_i2c_remove(struct i2c_client *client)
+{
+	struct qixis_priv *priv;
+	struct list_head *pos;
+	struct mdio_mux_data *mux_data;
+
+	priv = i2c_get_clientdata(client);
+	list_for_each(pos, &priv->mdio_mux_list) {
+		mux_data = list_entry(pos, struct mdio_mux_data, link);
+		mdio_mux_regmap_uninit(mux_data->data);
+	}
+	regmap_exit(priv->regmap);
+
+	return 0;
+}
+
+static const struct of_device_id fsl_qixis_of_match[] = {
+	{ .compatible = "fsl,fpga-qixis-i2c" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, fsl_qixis_of_match);
+
+static struct i2c_driver fsl_qixis_i2c_driver = {
+	.driver = {
+		.name	= "qixis_ctrl",
+		.owner	= THIS_MODULE,
+		.of_match_table = of_match_ptr(fsl_qixis_of_match),
+	},
+	.probe_new	= fsl_qixis_i2c_probe,
+	.remove		= fsl_qixis_i2c_remove,
+};
+module_i2c_driver(fsl_qixis_i2c_driver);
+
+MODULE_AUTHOR("Wang Dongsheng <dongsheng.wang@freescale.com>");
+MODULE_DESCRIPTION("Freescale QIXIS system controller driver");
+MODULE_LICENSE("GPL v2");
-- 
2.17.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply related	[flat|nested] 6+ messages in thread
end of thread, other threads:[~2019-01-30 11:40 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-01-30 11:34 [PATCH v2 0/2] add i2c controlled qixis driver Pankaj Bansal
2019-01-30 11:34 ` Pankaj Bansal
2019-01-30 11:34 ` [PATCH v2 1/2] dt-bindings: soc: fsl: Document Qixis FPGA usage Pankaj Bansal
2019-01-30 11:34   ` Pankaj Bansal
2019-01-30 11:34 ` [PATCH v2 2/2] fsl: add i2c controlled qixis driver Pankaj Bansal
2019-01-30 11:34   ` Pankaj Bansal

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