Re: [PATCH 02/10] pwm: Add SI-EN SN3112 PWM support

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On 25/04/2024 02:57, Junhao Xie wrote:
On 2024/4/25 03:37, Konrad Dybcio wrote:
On 4/24/24 17:29, Xilin Wu via B4 Relay wrote:
From: Junhao Xie <bigfoot@xxxxxxxxxxx>

Add a new driver for the SI-EN SN3112 12-channel 8-bit PWM LED controller.

Signed-off-by: Junhao Xie <bigfoot@xxxxxxxxxxx>
---
[...]
+    return sn3112_write_reg(priv, SN3112_REG_PWM_EN + reg,
+                priv->pwm_en_reg[reg]);

This looks like a weird reimplementation of regmap_update_bits


We cannot use regmap_update_bits because this chip does not support read command.
It will discard all read command.

You could use regmap cache with all registers marked as cacheable, but not sure it's worth
doing this.

Neil


+}
+
[...]

devm_pwmchip_add?

Konrad

Thank you for your reply, I will fix them.






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