Hi Ryan,
On Sat, Apr 15, 2023 at 09:28:48AM +0800, Ryan Chen wrote:
> Add i2c new register mode driver to support AST2600 i2c
> new register mode. AST2600 i2c controller have legacy and
> new register mode. The new register mode have global register
> support 4 base clock for scl clock selection, and new clock
> divider mode. The i2c new register mode have separate register
> set to control i2c master and slave.
This commit message is a bit messy, could you please write it
more clear?
[...]
> +static int ast2600_i2c_probe(struct platform_device *pdev)
> +{
> + struct device_node *np = pdev->dev.of_node;
> + struct device *dev = &pdev->dev;
> + struct ast2600_i2c_bus *i2c_bus;
> + struct resource *res;
> + u32 global_ctrl;
> + int ret = 0;
> +
> + i2c_bus = devm_kzalloc(dev, sizeof(*i2c_bus), GFP_KERNEL);
> + if (!i2c_bus)
> + return -ENOMEM;
Let's use dev_err_probe whenever possible, at least we keep a
coherent style.
[...]
> + ret = devm_request_irq(dev, i2c_bus->irq, ast2600_i2c_bus_irq, 0,
> + dev_name(dev), i2c_bus);
isn't it better to use threaded irq? You have quite an elaborate
irq handler, you may want to use a thread for it.
> + if (ret < 0)
> + return dev_err_probe(dev, ret, "Unable to request irq %d\n", i2c_bus->irq);
> +
> + if (of_property_read_bool(dev->of_node, "smbus-alert")) {
> + i2c_bus->alert_enable = 1;
true;
alert_enable is boolean, make it bool.
> + i2c_bus->ara = i2c_new_smbus_alert_device(&i2c_bus->adap, &i2c_bus->alert_data);
> + if (!i2c_bus->ara)
> + dev_warn(dev, "Failed to register ARA client\n");
> +
> + writel(AST2600_I2CM_PKT_DONE | AST2600_I2CM_BUS_RECOVER | AST2600_I2CM_SMBUS_ALT,
> + i2c_bus->reg_base + AST2600_I2CM_IER);
> + } else {
> + i2c_bus->alert_enable = 0;
false;
I'm not going to review any further, please send the patch after
you have run checkpatch.pl on it. Thanks!
Andi
