staging: comedi: ii_pci20kc: use the comedi_device 'mmio' member

Use the new 'mmio' member in the comedi_device for the __iomem * base
address.

Since this was the only member in the private data, remove the struct
and its allocation.

This legacy driver is a bit strange. The base address of the board is
passed to the (*attach) using by the user using the comedi_config
utiltiy. This base address is currently not ioremap'ed and is simply
cast to a void __iomem *. I'm not sure if this is correct. Add a
comment so it will be addressed later.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers/ii_pci20kc.c b/drivers/staging/comedi/drivers/ii_pci20kc.c
index 2516ce8..b1f44b3 100644 (file)
--- a/drivers/staging/comedi/drivers/ii_pci20kc.c
+++ b/drivers/staging/comedi/drivers/ii_pci20kc.c
@@ -135,16 +135,10 @@ struct ii20k_ao_private {
        unsigned int last_data[2];
 };
 
-struct ii20k_private {
-       void __iomem *ioaddr;
-};
-
 static void __iomem *ii20k_module_iobase(struct comedi_device *dev,
                                         struct comedi_subdevice *s)
 {
-       struct ii20k_private *devpriv = dev->private;
-
-       return devpriv->ioaddr + (s->index + 1) * II20K_MOD_OFFSET;
+       return dev->mmio + (s->index + 1) * II20K_MOD_OFFSET;
 }
 
 static int ii20k_ao_insn_read(struct comedi_device *dev,
@@ -281,7 +275,6 @@ static int ii20k_ai_insn_read(struct comedi_device *dev,
 static void ii20k_dio_config(struct comedi_device *dev,
                             struct comedi_subdevice *s)
 {
-       struct ii20k_private *devpriv = dev->private;
        unsigned char ctrl01 = 0;
        unsigned char ctrl23 = 0;
        unsigned char dir_ena = 0;
@@ -338,9 +331,9 @@ static void ii20k_dio_config(struct comedi_device *dev,
        ctrl23 |= II20K_CTRL23_SET;
 
        /* order is important */
-       writeb(ctrl01, devpriv->ioaddr + II20K_CTRL01_REG);
-       writeb(ctrl23, devpriv->ioaddr + II20K_CTRL23_REG);
-       writeb(dir_ena, devpriv->ioaddr + II20K_DIR_ENA_REG);
+       writeb(ctrl01, dev->mmio + II20K_CTRL01_REG);
+       writeb(ctrl23, dev->mmio + II20K_CTRL23_REG);
+       writeb(dir_ena, dev->mmio + II20K_DIR_ENA_REG);
 }
 
 static int ii20k_dio_insn_config(struct comedi_device *dev,
@@ -375,29 +368,28 @@ static int ii20k_dio_insn_bits(struct comedi_device *dev,
                               struct comedi_insn *insn,
                               unsigned int *data)
 {
-       struct ii20k_private *devpriv = dev->private;
        unsigned int mask;
 
        mask = comedi_dio_update_state(s, data);
        if (mask) {
                if (mask & 0x000000ff)
                        writeb((s->state >> 0) & 0xff,
-                              devpriv->ioaddr + II20K_DIO0_REG);
+                              dev->mmio + II20K_DIO0_REG);
                if (mask & 0x0000ff00)
                        writeb((s->state >> 8) & 0xff,
-                              devpriv->ioaddr + II20K_DIO1_REG);
+                              dev->mmio + II20K_DIO1_REG);
                if (mask & 0x00ff0000)
                        writeb((s->state >> 16) & 0xff,
-                              devpriv->ioaddr + II20K_DIO2_REG);
+                              dev->mmio + II20K_DIO2_REG);
                if (mask & 0xff000000)
                        writeb((s->state >> 24) & 0xff,
-                              devpriv->ioaddr + II20K_DIO3_REG);
+                              dev->mmio + II20K_DIO3_REG);
        }
 
-       data[1] = readb(devpriv->ioaddr + II20K_DIO0_REG);
-       data[1] |= readb(devpriv->ioaddr + II20K_DIO1_REG) << 8;
-       data[1] |= readb(devpriv->ioaddr + II20K_DIO2_REG) << 16;
-       data[1] |= readb(devpriv->ioaddr + II20K_DIO3_REG) << 24;
+       data[1] = readb(dev->mmio + II20K_DIO0_REG);
+       data[1] |= readb(dev->mmio + II20K_DIO1_REG) << 8;
+       data[1] |= readb(dev->mmio + II20K_DIO2_REG) << 16;
+       data[1] |= readb(dev->mmio + II20K_DIO3_REG) << 24;
 
        return insn->n;
 }
@@ -446,19 +438,15 @@ static int ii20k_init_module(struct comedi_device *dev,
 static int ii20k_attach(struct comedi_device *dev,
                        struct comedi_devconfig *it)
 {
-       struct ii20k_private *devpriv;
        struct comedi_subdevice *s;
        unsigned char id;
        bool has_dio;
        int ret;
 
-       devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
-       if (!devpriv)
-               return -ENOMEM;
-
-       devpriv->ioaddr = (void __iomem *)(unsigned long)it->options[0];
+       /* FIXME: this doesn't seem right, should 'mmio' be ioremap'ed? */
+       dev->mmio = (void __iomem *)(unsigned long)it->options[0];
 
-       id = readb(devpriv->ioaddr + II20K_ID_REG);
+       id = readb(dev->mmio + II20K_ID_REG);
        switch (id & II20K_ID_MASK) {
        case II20K_ID_PCI20001C_1A:
                has_dio = false;