On Fri, 4 Aug 2017 10:38:26 +0800 "David.Wu" <david.wu@xxxxxxxxxxxxxx> wrote: > Hi Boris, > > 在 2017/8/2 19:40, Boris Brezillon 写道: > > Yep, just define 3 different pwm_ops (one for each IP), each of them > > implementing ->apply() and ->get_state() and that's all. > > > > Something like: > > > > static const struct pwm_ops rockchip_pwm_ops_v1 = { > > .get_state = rockchip_pwm_v1_get_state, > > .apply = rockchip_pwm_v1_apply, > > .owner = THIS_MODULE, > > }; > > > > static const struct pwm_ops rockchip_pwm_ops_v2 = { > > .get_state = rockchip_pwm_v2_get_state, > > .apply = rockchip_pwm_v2_apply, > > .owner = THIS_MODULE, > > }; > > > > static const struct pwm_ops rockchip_pwm_ops_vop = { > > .get_state = rockchip_pwm_vop_get_state, > > .apply = rockchip_pwm_vop_apply, > > .owner = THIS_MODULE, > > }; > > > > static const struct of_device_id rockchip_pwm_dt_ids[] = { > > { .compatible = "rockchip,rk2928-pwm", .data = &rockchip_pwm_ops_v1 }, > > { .compatible = "rockchip,rk3288-pwm", .data = &rockchip_pwm_ops_v2 }, > > { .compatible = "rockchip,vop-pwm", .data = &rockchip_pwm_ops_vop }, > > { /* sentinel */ } > > }; > > MODULE_DEVICE_TABLE(of, rockchip_pwm_dt_ids); > > I think we should keep the data members in the rockchip_pwm_data,like > supports_polarity and regs... > > The supports_polarity is needed for of_pwm_n_cells when pwm registered. > And the other data members is helpful for us to use common code. > > It's okay for just define 3 different pwm_ops (one for each IP), but > they are with other data members in the struct of rockchip_pwm_data. > I think we could even get rid of the other fields in rockchip_pwm_data, but ok, let's do that. -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html