Processed review comments, thanks for the quick feed back!
Main changes are:
* dev_* instead of pr_*
* ioread32/iowrite32 instead of inl/outl
* use module_platform_driver macro
* disabling interrupt twice was unnecessary
New patch has been tested on our own architecture (ARC) and
builds cleanly on x86-64.
Mischa Jonker (1):
Input: serio - Add ARC PS/2 driver
drivers/input/serio/Kconfig | 9 ++
drivers/input/serio/Makefile | 1 +
drivers/input/serio/arc_ps2.c | 275 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 285 insertions(+), 0 deletions(-)
create mode 100644 drivers/input/serio/arc_ps2.c
This adds support for the PS/2 block that is used in various ARC FPGA
platforms.
Signed-off-by: Mischa Jonker <[email protected]>
---
drivers/input/serio/Kconfig | 9 ++
drivers/input/serio/Makefile | 1 +
drivers/input/serio/arc_ps2.c | 275 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 285 insertions(+), 0 deletions(-)
create mode 100644 drivers/input/serio/arc_ps2.c
diff --git a/drivers/input/serio/Kconfig b/drivers/input/serio/Kconfig
index 55f2c22..4a4e182 100644
--- a/drivers/input/serio/Kconfig
+++ b/drivers/input/serio/Kconfig
@@ -234,4 +234,13 @@ config SERIO_PS2MULT
To compile this driver as a module, choose M here: the
module will be called ps2mult.
+config SERIO_ARC_PS2
+ tristate "ARC PS/2 support"
+ help
+ Say Y here if you have an ARC FPGA platform with a PS/2
+ controller in it.
+
+ To compile this driver as a module, choose M here; the module
+ will be called arc_ps2.
+
endif
diff --git a/drivers/input/serio/Makefile b/drivers/input/serio/Makefile
index dbbe376..4b0c8f8 100644
--- a/drivers/input/serio/Makefile
+++ b/drivers/input/serio/Makefile
@@ -25,3 +25,4 @@ obj-$(CONFIG_SERIO_RAW) += serio_raw.o
obj-$(CONFIG_SERIO_AMS_DELTA) += ams_delta_serio.o
obj-$(CONFIG_SERIO_XILINX_XPS_PS2) += xilinx_ps2.o
obj-$(CONFIG_SERIO_ALTERA_PS2) += altera_ps2.o
+obj-$(CONFIG_SERIO_ARC_PS2) += arc_ps2.o
diff --git a/drivers/input/serio/arc_ps2.c b/drivers/input/serio/arc_ps2.c
new file mode 100644
index 0000000..c952685
--- /dev/null
+++ b/drivers/input/serio/arc_ps2.c
@@ -0,0 +1,275 @@
+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (http://www.synopsys.com)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Driver is originally developed by Pavel Sokolov <[email protected]>
+ */
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/serio.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+
+#define ARC_PS2_PORTS (2)
+
+#define ARC_ARC_PS2_ID (0x0001f609)
+
+#define STAT_TIMEOUT (128)
+
+#define PS2_STAT_RX_FRM_ERR (1)
+#define PS2_STAT_RX_BUF_OVER (1 << 1)
+#define PS2_STAT_RX_INT_EN (1 << 2)
+#define PS2_STAT_RX_VAL (1 << 3)
+#define PS2_STAT_TX_ISNOT_FUL (1 << 4)
+#define PS2_STAT_TX_INT_EN (1 << 5)
+
+struct arc_ps2_port {
+ void *data, *status;
+ struct serio *io;
+};
+
+struct arc_ps2_data {
+ struct arc_ps2_port port[ARC_PS2_PORTS];
+ struct resource *iomem_res;
+ int irq;
+ void *addr;
+ unsigned frame_error;
+ unsigned buf_overflow;
+ unsigned total_int;
+};
+
+static void arc_ps2_check_rx(struct arc_ps2_data *arc_ps2,
+ struct arc_ps2_port *port)
+{
+ unsigned flag, status;
+ unsigned char data;
+
+ while (1) {
+ status = ioread32(port->status);
+ if (!(status & PS2_STAT_RX_VAL))
+ break;
+ flag = 0;
+
+ arc_ps2->total_int++;
+ if (status & PS2_STAT_RX_FRM_ERR) {
+ arc_ps2->frame_error++;
+ flag |= SERIO_PARITY;
+ } else if (status & PS2_STAT_RX_BUF_OVER) {
+ arc_ps2->buf_overflow++;
+ flag |= SERIO_FRAME;
+ }
+ data = ioread32(port->data) & 0xff;
+
+ serio_interrupt(port->io, data, flag);
+ }
+}
+
+static irqreturn_t arc_ps2_interrupt(int irq, void *dev)
+{
+ struct arc_ps2_data *arc_ps2 = dev;
+ int i;
+
+ for (i = 0; i < ARC_PS2_PORTS; i++)
+ arc_ps2_check_rx(arc_ps2, &arc_ps2->port[i]);
+
+ return IRQ_HANDLED;
+}
+
+static int arc_ps2_write(struct serio *io, unsigned char val)
+{
+ unsigned status;
+ struct arc_ps2_port *port = io->port_data;
+ int timeout = STAT_TIMEOUT;
+
+ do {
+ status = ioread32(port->status);
+ cpu_relax();
+ timeout--;
+ } while (!(status & PS2_STAT_TX_ISNOT_FUL) && timeout);
+
+ if (timeout)
+ iowrite32(val & 0xff, port->data);
+ else {
+ dev_err(&io->dev, "write timeout\n");
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
+
+static int arc_ps2_open(struct serio *io)
+{
+ struct arc_ps2_port *port = io->port_data;
+ iowrite32(PS2_STAT_RX_INT_EN, port->status);
+ return 0;
+}
+
+static void arc_ps2_close(struct serio *io)
+{
+ struct arc_ps2_port *port = io->port_data;
+
+ iowrite32(ioread32(port->status) & ~PS2_STAT_RX_INT_EN, port->status);
+}
+
+static int __devinit arc_ps2_allocate_port(struct platform_device *pdev,
+ struct arc_ps2_port *port,
+ int index, void *base)
+{
+ struct serio *io;
+
+ io = kzalloc(sizeof(struct serio), GFP_KERNEL);
+ if (!io)
+ return -ENOMEM;
+
+ io->id.type = SERIO_8042;
+ io->write = arc_ps2_write;
+ io->open = arc_ps2_open;
+ io->close = arc_ps2_close;
+ snprintf(io->name, sizeof(io->name), "ARC PS/2 port%d", index);
+ snprintf(io->phys, sizeof(io->phys), "arc/serio%d", index);
+ io->port_data = port;
+
+ port->io = io;
+
+ port->data = base + 4 + index * 4;
+ port->status = base + 4 + ARC_PS2_PORTS * 4 + index * 4;
+
+ dev_dbg(&pdev->dev, "port%d is allocated (data = 0x%p, status = 0x%p)\n",
+ index, port->data, port->status);
+
+ return 0;
+}
+
+static int __devinit arc_ps2_probe(struct platform_device *pdev)
+{
+ struct arc_ps2_data *arc_ps2;
+ int ret, id, i;
+
+ arc_ps2 = kzalloc(sizeof(struct arc_ps2_data), GFP_KERNEL);
+ if (!arc_ps2) {
+ dev_err(&pdev->dev, "out of memory\n");
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ arc_ps2->iomem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!arc_ps2->iomem_res) {
+ dev_err(&pdev->dev, "no IO memory defined\n");
+ ret = -ENODEV;
+ goto out_free;
+ }
+
+ arc_ps2->irq = platform_get_irq_byname(pdev, "arc_ps2_irq");
+ if (arc_ps2->irq < 0) {
+ dev_err(&pdev->dev, "no IRQ defined\n");
+ ret = -ENODEV;
+ goto out_free;
+ }
+
+ if (!request_mem_region(arc_ps2->iomem_res->start,
+ resource_size(arc_ps2->iomem_res), pdev->name)) {
+ dev_err(&pdev->dev, "memory allocation failed cannot get the I/O addr 0x%x\n",
+ (unsigned int)arc_ps2->iomem_res->start);
+
+ ret = -EBUSY;
+ goto out_free;
+ }
+
+ arc_ps2->addr = ioremap_nocache(arc_ps2->iomem_res->start,
+ resource_size(arc_ps2->iomem_res));
+ if (!arc_ps2->addr) {
+ dev_err(&pdev->dev, "memory mapping failed\n");
+ ret = -ENOMEM;
+ goto out_release_region;
+ }
+
+ dev_info(&pdev->dev, "irq = %d, address = 0x%p, ports = %i\n",
+ arc_ps2->irq, arc_ps2->addr, ARC_PS2_PORTS);
+
+ id = ioread32(arc_ps2->addr);
+ if (id != ARC_ARC_PS2_ID) {
+ dev_err(&pdev->dev, "device id does not match\n");
+ ret = ENXIO;
+ goto out_unmap;
+ }
+
+ platform_set_drvdata(pdev, arc_ps2);
+
+ for (i = 0; i < ARC_PS2_PORTS; i++) {
+ ret = arc_ps2_allocate_port(pdev, &arc_ps2->port[i], i,
+ arc_ps2->addr);
+ if (ret)
+ goto release;
+ serio_register_port(arc_ps2->port[i].io);
+ }
+
+ ret = request_irq(arc_ps2->irq, arc_ps2_interrupt, 0,
+ "arc_ps2", arc_ps2);
+ if (ret) {
+ dev_err(&pdev->dev, "Could not allocate IRQ\n");
+ goto release;
+ }
+
+ return 0;
+
+release:
+ for (i = 0; i < ARC_PS2_PORTS; i++) {
+ if (arc_ps2->port[i].io)
+ serio_unregister_port(arc_ps2->port[i].io);
+ }
+out_unmap:
+ iounmap((void __iomem *) arc_ps2->addr);
+out_release_region:
+ release_mem_region(arc_ps2->iomem_res->start,
+ resource_size(arc_ps2->iomem_res));
+out_free:
+ kfree(arc_ps2);
+out:
+ return ret;
+}
+
+static int __devexit arc_ps2_remove(struct platform_device *pdev)
+{
+ struct arc_ps2_data *arc_ps2;
+ int i;
+
+ arc_ps2 = platform_get_drvdata(pdev);
+ for (i = 0; i < ARC_PS2_PORTS; i++)
+ serio_unregister_port(arc_ps2->port[i].io);
+
+ free_irq(arc_ps2->irq, arc_ps2);
+ iounmap((void __iomem *) arc_ps2->addr);
+ release_mem_region(arc_ps2->iomem_res->start,
+ resource_size(arc_ps2->iomem_res));
+
+ dev_dbg(&pdev->dev, "interrupt count = %i\n", arc_ps2->total_int);
+ dev_dbg(&pdev->dev, "frame error count = %i\n", arc_ps2->frame_error);
+ dev_dbg(&pdev->dev, "buffer overflow count = %i\n",
+ arc_ps2->buf_overflow);
+
+ kfree(arc_ps2);
+
+ return 0;
+}
+
+static struct platform_driver arc_ps2_driver = {
+ .driver = {
+ .name = "arc_ps2",
+ .owner = THIS_MODULE,
+ },
+ .probe = arc_ps2_probe,
+ .remove = __devexit_p(arc_ps2_remove),
+};
+
+module_platform_driver(arc_ps2_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Pavel Sokolov <[email protected]>");
+MODULE_DESCRIPTION("ARC PS/2 Driver");
--
1.7.0.4
Hi Mischa,
On Wed, Oct 17, 2012 at 12:10:19PM +0200, Mischa Jonker wrote:
> This adds support for the PS/2 block that is used in various ARC FPGA
> platforms.
>
Thank you for making changes. A few more comments below.
> Signed-off-by: Mischa Jonker <[email protected]>
> ---
> drivers/input/serio/Kconfig | 9 ++
> drivers/input/serio/Makefile | 1 +
> drivers/input/serio/arc_ps2.c | 275 +++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 285 insertions(+), 0 deletions(-)
> create mode 100644 drivers/input/serio/arc_ps2.c
>
> diff --git a/drivers/input/serio/Kconfig b/drivers/input/serio/Kconfig
> index 55f2c22..4a4e182 100644
> --- a/drivers/input/serio/Kconfig
> +++ b/drivers/input/serio/Kconfig
> @@ -234,4 +234,13 @@ config SERIO_PS2MULT
> To compile this driver as a module, choose M here: the
> module will be called ps2mult.
>
> +config SERIO_ARC_PS2
> + tristate "ARC PS/2 support"
> + help
> + Say Y here if you have an ARC FPGA platform with a PS/2
> + controller in it.
> +
> + To compile this driver as a module, choose M here; the module
> + will be called arc_ps2.
> +
> endif
> diff --git a/drivers/input/serio/Makefile b/drivers/input/serio/Makefile
> index dbbe376..4b0c8f8 100644
> --- a/drivers/input/serio/Makefile
> +++ b/drivers/input/serio/Makefile
> @@ -25,3 +25,4 @@ obj-$(CONFIG_SERIO_RAW) += serio_raw.o
> obj-$(CONFIG_SERIO_AMS_DELTA) += ams_delta_serio.o
> obj-$(CONFIG_SERIO_XILINX_XPS_PS2) += xilinx_ps2.o
> obj-$(CONFIG_SERIO_ALTERA_PS2) += altera_ps2.o
> +obj-$(CONFIG_SERIO_ARC_PS2) += arc_ps2.o
> diff --git a/drivers/input/serio/arc_ps2.c b/drivers/input/serio/arc_ps2.c
> new file mode 100644
> index 0000000..c952685
> --- /dev/null
> +++ b/drivers/input/serio/arc_ps2.c
> @@ -0,0 +1,275 @@
> +/*
> + * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (http://www.synopsys.com)
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * Driver is originally developed by Pavel Sokolov <[email protected]>
> + */
> +
> +#include <linux/module.h>
> +#include <linux/interrupt.h>
> +#include <linux/input.h>
> +#include <linux/serio.h>
> +#include <linux/platform_device.h>
> +#include <linux/io.h>
> +#include <linux/kernel.h>
> +#include <linux/slab.h>
> +
> +#define ARC_PS2_PORTS (2)
> +
> +#define ARC_ARC_PS2_ID (0x0001f609)
> +
> +#define STAT_TIMEOUT (128)
> +
> +#define PS2_STAT_RX_FRM_ERR (1)
> +#define PS2_STAT_RX_BUF_OVER (1 << 1)
> +#define PS2_STAT_RX_INT_EN (1 << 2)
> +#define PS2_STAT_RX_VAL (1 << 3)
> +#define PS2_STAT_TX_ISNOT_FUL (1 << 4)
> +#define PS2_STAT_TX_INT_EN (1 << 5)
> +
> +struct arc_ps2_port {
> + void *data, *status;
These 2 should be annotated as __iomem. May I also suggest calling them
data_addt and status_addr?
> + struct serio *io;
> +};
> +
> +struct arc_ps2_data {
> + struct arc_ps2_port port[ARC_PS2_PORTS];
> + struct resource *iomem_res;
> + int irq;
> + void *addr;
void __iomem *
> + unsigned frame_error;
Prefer "unsigned int".
> + unsigned buf_overflow;
> + unsigned total_int;
> +};
> +
> +static void arc_ps2_check_rx(struct arc_ps2_data *arc_ps2,
> + struct arc_ps2_port *port)
> +{
> + unsigned flag, status;
> + unsigned char data;
> +
> + while (1) {
> + status = ioread32(port->status);
> + if (!(status & PS2_STAT_RX_VAL))
> + break;
> + flag = 0;
> +
> + arc_ps2->total_int++;
> + if (status & PS2_STAT_RX_FRM_ERR) {
> + arc_ps2->frame_error++;
> + flag |= SERIO_PARITY;
> + } else if (status & PS2_STAT_RX_BUF_OVER) {
> + arc_ps2->buf_overflow++;
> + flag |= SERIO_FRAME;
> + }
> + data = ioread32(port->data) & 0xff;
> +
> + serio_interrupt(port->io, data, flag);
> + }
> +}
> +
> +static irqreturn_t arc_ps2_interrupt(int irq, void *dev)
> +{
> + struct arc_ps2_data *arc_ps2 = dev;
> + int i;
> +
> + for (i = 0; i < ARC_PS2_PORTS; i++)
> + arc_ps2_check_rx(arc_ps2, &arc_ps2->port[i]);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static int arc_ps2_write(struct serio *io, unsigned char val)
> +{
> + unsigned status;
> + struct arc_ps2_port *port = io->port_data;
> + int timeout = STAT_TIMEOUT;
> +
> + do {
> + status = ioread32(port->status);
> + cpu_relax();
> + timeout--;
> + } while (!(status & PS2_STAT_TX_ISNOT_FUL) && timeout);
> +
> + if (timeout)
Curly braces on this branch too please - the rule is that all branches
should have or not have braces. This overrides the single-statement
rule.
> + iowrite32(val & 0xff, port->data);
> + else {
> + dev_err(&io->dev, "write timeout\n");
> + return -ETIMEDOUT;
> + }
> +
> + return 0;
> +}
> +
> +static int arc_ps2_open(struct serio *io)
> +{
> + struct arc_ps2_port *port = io->port_data;
> + iowrite32(PS2_STAT_RX_INT_EN, port->status);
> + return 0;
> +}
> +
> +static void arc_ps2_close(struct serio *io)
> +{
> + struct arc_ps2_port *port = io->port_data;
> +
> + iowrite32(ioread32(port->status) & ~PS2_STAT_RX_INT_EN, port->status);
> +}
> +
> +static int __devinit arc_ps2_allocate_port(struct platform_device *pdev,
> + struct arc_ps2_port *port,
> + int index, void *base)
> +{
> + struct serio *io;
> +
> + io = kzalloc(sizeof(struct serio), GFP_KERNEL);
> + if (!io)
> + return -ENOMEM;
> +
> + io->id.type = SERIO_8042;
> + io->write = arc_ps2_write;
> + io->open = arc_ps2_open;
> + io->close = arc_ps2_close;
> + snprintf(io->name, sizeof(io->name), "ARC PS/2 port%d", index);
> + snprintf(io->phys, sizeof(io->phys), "arc/serio%d", index);
> + io->port_data = port;
> +
> + port->io = io;
> +
> + port->data = base + 4 + index * 4;
> + port->status = base + 4 + ARC_PS2_PORTS * 4 + index * 4;
> +
> + dev_dbg(&pdev->dev, "port%d is allocated (data = 0x%p, status = 0x%p)\n",
> + index, port->data, port->status);
> +
> + return 0;
> +}
> +
> +static int __devinit arc_ps2_probe(struct platform_device *pdev)
> +{
> + struct arc_ps2_data *arc_ps2;
> + int ret, id, i;
> +
> + arc_ps2 = kzalloc(sizeof(struct arc_ps2_data), GFP_KERNEL);
> + if (!arc_ps2) {
> + dev_err(&pdev->dev, "out of memory\n");
> + ret = -ENOMEM;
> + goto out;
> + }
> +
> + arc_ps2->iomem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (!arc_ps2->iomem_res) {
> + dev_err(&pdev->dev, "no IO memory defined\n");
> + ret = -ENODEV;
-EINVAL
> + goto out_free;
> + }
> +
> + arc_ps2->irq = platform_get_irq_byname(pdev, "arc_ps2_irq");
> + if (arc_ps2->irq < 0) {
> + dev_err(&pdev->dev, "no IRQ defined\n");
> + ret = -ENODEV;
-EINVAL
> + goto out_free;
> + }
> +
> + if (!request_mem_region(arc_ps2->iomem_res->start,
> + resource_size(arc_ps2->iomem_res), pdev->name)) {
> + dev_err(&pdev->dev, "memory allocation failed cannot get the I/O addr 0x%x\n",
> + (unsigned int)arc_ps2->iomem_res->start);
I think we have a format specifier for resources.
> +
> + ret = -EBUSY;
> + goto out_free;
> + }
> +
> + arc_ps2->addr = ioremap_nocache(arc_ps2->iomem_res->start,
> + resource_size(arc_ps2->iomem_res));
> + if (!arc_ps2->addr) {
> + dev_err(&pdev->dev, "memory mapping failed\n");
> + ret = -ENOMEM;
> + goto out_release_region;
> + }
> +
> + dev_info(&pdev->dev, "irq = %d, address = 0x%p, ports = %i\n",
> + arc_ps2->irq, arc_ps2->addr, ARC_PS2_PORTS);
> +
> + id = ioread32(arc_ps2->addr);
> + if (id != ARC_ARC_PS2_ID) {
> + dev_err(&pdev->dev, "device id does not match\n");
> + ret = ENXIO;
-ENXIO
> + goto out_unmap;
> + }
> +
> + platform_set_drvdata(pdev, arc_ps2);
> +
> + for (i = 0; i < ARC_PS2_PORTS; i++) {
> + ret = arc_ps2_allocate_port(pdev, &arc_ps2->port[i], i,
> + arc_ps2->addr);
> + if (ret)
> + goto release;
Can we rename 'ret' to 'error'?
> + serio_register_port(arc_ps2->port[i].io);
> + }
> +
> + ret = request_irq(arc_ps2->irq, arc_ps2_interrupt, 0,
> + "arc_ps2", arc_ps2);
> + if (ret) {
> + dev_err(&pdev->dev, "Could not allocate IRQ\n");
> + goto release;
> + }
> +
> + return 0;
> +
> +release:
> + for (i = 0; i < ARC_PS2_PORTS; i++) {
> + if (arc_ps2->port[i].io)
> + serio_unregister_port(arc_ps2->port[i].io);
> + }
> +out_unmap:
> + iounmap((void __iomem *) arc_ps2->addr);
No need to cast to __iomem here.
> +out_release_region:
> + release_mem_region(arc_ps2->iomem_res->start,
> + resource_size(arc_ps2->iomem_res));
> +out_free:
> + kfree(arc_ps2);
> +out:
> + return ret;
> +}
> +
> +static int __devexit arc_ps2_remove(struct platform_device *pdev)
> +{
> + struct arc_ps2_data *arc_ps2;
> + int i;
> +
> + arc_ps2 = platform_get_drvdata(pdev);
> + for (i = 0; i < ARC_PS2_PORTS; i++)
> + serio_unregister_port(arc_ps2->port[i].io);
> +
> + free_irq(arc_ps2->irq, arc_ps2);
> + iounmap((void __iomem *) arc_ps2->addr);
No need to cast to __iomem here.
> + release_mem_region(arc_ps2->iomem_res->start,
> + resource_size(arc_ps2->iomem_res));
> +
> + dev_dbg(&pdev->dev, "interrupt count = %i\n", arc_ps2->total_int);
> + dev_dbg(&pdev->dev, "frame error count = %i\n", arc_ps2->frame_error);
> + dev_dbg(&pdev->dev, "buffer overflow count = %i\n",
> + arc_ps2->buf_overflow);
> +
> + kfree(arc_ps2);
> +
> + return 0;
> +}
> +
> +static struct platform_driver arc_ps2_driver = {
> + .driver = {
> + .name = "arc_ps2",
> + .owner = THIS_MODULE,
> + },
> + .probe = arc_ps2_probe,
> + .remove = __devexit_p(arc_ps2_remove),
> +};
> +
> +module_platform_driver(arc_ps2_driver);
> +
> +MODULE_LICENSE("GPL");
> +MODULE_AUTHOR("Pavel Sokolov <[email protected]>");
> +MODULE_DESCRIPTION("ARC PS/2 Driver");
> --
> 1.7.0.4
>
--
Dmitry
Hi Dmitry,
Thanks again for your quick reply.
>> + void *data, *status;
>These 2 should be annotated as __iomem. May I also suggest calling them data_addt and status_addr?
I assume you meant data_addr.
>> + dev_err(&pdev->dev, "memory allocation failed cannot get the I/O addr 0x%x\n",
>> + (unsigned int)arc_ps2->iomem_res->start);
> I think we have a format specifier for resources.
Thanks, didn't know that!
>> + iounmap((void __iomem *) arc_ps2->addr);
> No need to cast to __iomem here.
These are remains from the time that addr was still an 'unsigned' (while using inl/outl). Updated.
Patch v3 will follow in due course.
Thanks again,
Mischa