Hi,
On 05/01/2016 at 16:31:38 +0800, Huang, Tao wrote :
> You and Alexandre are right. The rename is just make the driver more
> readable, i.e. let people know this driver suit for more PMIC no just
> rk808. In fact, I don't care the name is rk808 or rk8xx.
>
For this purpose, you can add the name of the supported PMICs in the
Kconfig.
> The key change of this patch is try to dis-coupling rk808 driver and RTC
> driver. Because of register offset and function is vary between
> different PMIC, we believe it is hard to write one PMIC driver to suit
> all PMIC. So we hope RTC driver can share between all PMIC from rockchip.
>
> Please review this code:
>
> -static int rk808_rtc_probe(struct platform_device *pdev)
> +static int rk8xx_rtc_probe(struct platform_device *pdev)
> {
> - struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
> ...
> + struct i2c_client *client = to_i2c_client(pdev->dev.parent);
>
> ...
>
> - rk808_rtc->rk808 = rk808;
> + rk8xx_rtc->regmap = devm_regmap_init_i2c(client,
> + &rk8xx_rtc_regmap_config);
> ...
> + rk8xx_rtc->i2c = client;
>
> Old driver have struct rk808 pointer, which defined on
> include/linux/mfd/rk808.h
> If we write new PMIC driver, for example rk818, define a new struct
> rk818. How can we get this pointer from RTC driver?
>
> So another way to solve this problem is introduce common struct share
> between all PMIC driver. For example rk8xx.
>
That is probably the best solution. If you want to reuse drivers between
pmic, then have a common structure that you can pass to those drivers.
I believe the regmap_init_i2c should stay in the MFD driver.
--
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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