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Date: Mon, 16 Aug 2021 11:20:03 +0800
From: Jianqun Xu <jay.xu@...k-chips.com>
To: lgirdwood@...il.com, broonie@...nel.org, ulf.hansson@...aro.org,
lee.jones@...aro.org, zhangchangzhong@...wei.com, heiko@...ech.de
Cc: linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
Jianqun Xu <jay.xu@...k-chips.com>
Subject: [PATCH 4/4] soc: rockchip: io-domain: do more thing about regulator notify
Do a fix to rockchip io-domain, follow this orders:
* system running state
-> io-domain vsel to 3.3V
-> regulator_enable
-> vsel change according to regulator voltage
* system running state
-> io-domain vsel to 3.3V
-> regulator_disable
Found on some Rockchip SoCs, the regulator enable or disable without
care about the io-domain maybe caused soc damaged.
Signed-off-by: Jianqun Xu <jay.xu@...k-chips.com>
---
drivers/soc/rockchip/io-domain.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/soc/rockchip/io-domain.c b/drivers/soc/rockchip/io-domain.c
index cf8182fc3642..af5fb11ad9a3 100644
--- a/drivers/soc/rockchip/io-domain.c
+++ b/drivers/soc/rockchip/io-domain.c
@@ -123,6 +123,12 @@ static int rockchip_iodomain_notify(struct notifier_block *nb,
} else if (event & (REGULATOR_EVENT_VOLTAGE_CHANGE |
REGULATOR_EVENT_ABORT_VOLTAGE_CHANGE)) {
uV = (unsigned long)data;
+ } else if (event & REGULATOR_EVENT_PRE_ENABLE) {
+ uV = MAX_VOLTAGE_3_3;
+ } else if (event & REGULATOR_EVENT_PRE_DISABLE) {
+ uV = MAX_VOLTAGE_3_3;
+ } else if (event & REGULATOR_EVENT_ENABLE) {
+ uV = (unsigned long)data;
} else {
return NOTIFY_OK;
}
--
2.25.1
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