[RFC] Non-numbered ibm iic driver

[Jon Smirl]

On 6/28/08, Sean MacLennan <smaclennan at pikatech.com> wrote:
> This is a patch to the ibm iic driver that uses the non-numbered
>  i2c call and therefore does not need an index. Instead, it registers the
>  ibm iic, then walks all the child nodes and adds them. This is required
>  for new style drivers, old style drivers "just work".

Check out the code in drivers/of/of_i2c.c. Can you use it instead?

>
>  The warp has both a new style driver (ad7414) and old style (eeprom)
>  devices.
>
>  This patch is completely function but not a complete patch (the index
>  code is not needed for example). It is just for comment.
>
>  The warp.dts needed for this to work is, I believe, in Josh's next tree.
>
>  Cheers,
>    Sean
>
>  P.S. Do I need a signed-off-by for an RFC?
>
>  Signed-off-by: Sean MacLennan <smaclennan at pikatech.com>
>  ---
>
>  diff --git a/drivers/i2c/busses/i2c-ibm_iic.c b/drivers/i2c/busses/i2c-ibm_iic.c
>  index 85dbf34..0ec6849 100644
>  --- a/drivers/i2c/busses/i2c-ibm_iic.c
>  +++ b/drivers/i2c/busses/i2c-ibm_iic.c
>  @@ -753,7 +753,7 @@ static int __devinit iic_probe(struct ocp_device *ocp){
>          */
>         adap->nr = dev->idx >= 0 ? dev->idx : 0;
>
>  -       if ((ret = i2c_add_numbered_adapter(adap)) < 0) {
>  +       if ((ret = i2c_add_adapter(adap)) < 0) {
>                 printk(KERN_ERR "ibm-iic%d: failed to register i2c adapter\n",
>                         dev->idx);
>                 goto fail;
>  @@ -874,6 +874,7 @@ static int __devinit iic_probe(struct of_device *ofdev,
>                                const struct of_device_id *match)
>   {
>         struct device_node *np = ofdev->node;
>  +       struct device_node *child;
>         struct ibm_iic_private *dev;
>         struct i2c_adapter *adap;
>         const u32 *indexp, *freq;
>  @@ -939,12 +940,33 @@ static int __devinit iic_probe(struct of_device *ofdev,
>         adap->timeout = 1;
>         adap->nr = dev->idx;
>
>  -       ret = i2c_add_numbered_adapter(adap);
>  +       ret = i2c_add_adapter(adap);
>         if (ret  < 0) {
>                 dev_err(&ofdev->dev, "failed to register i2c adapter\n");
>                 goto error_cleanup;
>         }
>
>  +       for_each_child_of_node(np, child) {
>  +               struct i2c_board_info info;
>  +               const u32 *reg;
>  +
>  +               reg = of_get_property(child, "reg", NULL);
>  +               if (!reg) {
>  +                       printk(KERN_ERR "Could not find address for %s\n",
>  +                              child->name);
>  +                       continue;
>  +               }
>  +
>  +               memset(&info, 0, sizeof(info));
>  +               strlcpy(info.type, child->name, I2C_NAME_SIZE);
>  +               info.addr = *reg;
>  +
>  +               if (!i2c_new_device(adap, &info))
>  +                       printk(KERN_ERR "Could not add i2c device %s.\n",
>  +                              child->name);
>  +       }
>  +
>  +
>         dev_info(&ofdev->dev, "using %s mode\n",
>                  dev->fast_mode ? "fast (400 kHz)" : "standard (100 kHz)");
>
>  _______________________________________________
>  Linuxppc-dev mailing list
>  Linuxppc-dev at ozlabs.org
>  https://ozlabs.org/mailman/listinfo/linuxppc-dev
>


-- 
Jon Smirl
jonsmirl at gmail.com