From: Stanley Chu <stanley.chu@mediatek.com>
To: Crystal Guo <crystal.guo@mediatek.com>
Cc: yong.liang@mediatek.com, srv_heupstream@mediatek.com,
seiya.wang@mediatek.com, linux-kernel@vger.kernel.org,
fan.chen@mediatek.com, robh+dt@kernel.org,
linux-mediatek@lists.infradead.org, p.zabel@pengutronix.de,
matthias.bgg@gmail.com, yingjoe.chen@mediatek.com,
linux-arm-kernel@lists.infradead.org
Subject: Re: [v2,5/6] reset-controller: ti: Introduce force-update method
Date: Tue, 4 Aug 2020 12:15:46 +0800 [thread overview]
Message-ID: <1596514546.32283.29.camel@mtkswgap22> (raw)
In-Reply-To: <20200803061511.29555-6-crystal.guo@mediatek.com>
On Mon, 2020-08-03 at 14:15 +0800, Crystal Guo wrote:
> Introduce force-update method for assert and deassert interface,
> which force the write operation in case the read already happens
> to return the correct value.
>
> Signed-off-by: Crystal Guo <crystal.guo@mediatek.com>
> ---
> drivers/reset/reset-ti-syscon.c | 15 +++++++++++++--
> 1 file changed, 13 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/reset/reset-ti-syscon.c b/drivers/reset/reset-ti-syscon.c
> index 1c74bcb9a6c3..f4baf78afd14 100644
> --- a/drivers/reset/reset-ti-syscon.c
> +++ b/drivers/reset/reset-ti-syscon.c
> @@ -57,6 +57,7 @@ struct ti_syscon_reset_data {
> struct ti_syscon_reset_control *controls;
> unsigned int nr_controls;
> bool assert_deassert_together;
> + bool update_force;
> };
>
> #define to_ti_syscon_reset_data(rcdev) \
> @@ -90,7 +91,10 @@ static int ti_syscon_reset_assert(struct reset_controller_dev *rcdev,
> mask = BIT(control->assert_bit);
> value = (control->flags & ASSERT_SET) ? mask : 0x0;
>
> - return regmap_update_bits(data->regmap, control->assert_offset, mask, value);
> + if (data->update_force)
> + return regmap_write_bits(data->regmap, control->assert_offset, mask, value);
> + else
> + return regmap_update_bits(data->regmap, control->assert_offset, mask, value);
> }
>
> /**
> @@ -121,7 +125,10 @@ static int ti_syscon_reset_deassert(struct reset_controller_dev *rcdev,
> mask = BIT(control->deassert_bit);
> value = (control->flags & DEASSERT_SET) ? mask : 0x0;
>
> - return regmap_update_bits(data->regmap, control->deassert_offset, mask, value);
> + if (data->update_force)
> + return regmap_write_bits(data->regmap, control->deassert_offset, mask, value);
> + else
> + return regmap_update_bits(data->regmap, control->deassert_offset, mask, value);
> }
>
> /**
> @@ -223,6 +230,10 @@ static int ti_syscon_reset_probe(struct platform_device *pdev)
> data->assert_deassert_together = true;
> else
> data->assert_deassert_together = false;
> + if (of_property_read_bool(np, "update-force"))
> + data->update_force = true;
> + else
> + data->update_force = false;
>
> data->rcdev.ops = &ti_syscon_reset_ops;
> data->rcdev.owner = THIS_MODULE;
This patch is good to help MediaTek drivers' transition to use
ti-syscon-reset-controller, also not have side effect to existed users.
Acked-by: Stanley Chu <stanley.chu@mediatek.com>
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next prev parent reply other threads:[~2020-08-04 4:34 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-03 6:15 [v2,0/6] introduce TI reset controller for MT8192 SoC Crystal Guo
2020-08-03 6:15 ` [v2, 1/6] dt-binding: reset-controller: ti: add assert-deassert-together property Crystal Guo
2020-08-03 6:15 ` [v2,2/6] dt-binding: reset-controller: ti: add update-force property Crystal Guo
2020-08-03 6:15 ` [v2, 3/6] dt-binding: reset-controller: ti: add generic-reset to compatible Crystal Guo
2020-08-04 8:15 ` [v2,3/6] " Philipp Zabel
2020-08-05 3:08 ` Yingjoe Chen
2020-08-03 6:15 ` [v2,4/6] reset-controller: ti: introduce a new reset handler Crystal Guo
2020-08-04 5:10 ` Stanley Chu
2020-08-04 7:16 ` Philipp Zabel
2020-08-03 6:15 ` [v2,5/6] reset-controller: ti: Introduce force-update method Crystal Guo
2020-08-04 4:15 ` Stanley Chu [this message]
2020-08-04 7:03 ` Philipp Zabel
2020-08-10 6:57 ` Crystal Guo
2020-09-02 23:05 ` Suman Anna
2020-08-05 3:14 ` Yingjoe Chen
2020-08-03 6:15 ` [v2,6/6] arm64: dts: mt8192: add infracfg_rst node Crystal Guo
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