From: jckuo <jckuo@nvidia.com>
To: Thierry Reding <thierry.reding@gmail.com>,
Kishon Vijay Abraham I <kishon@ti.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>,
<linux-tegra@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 4/5] phy: tegra: xusb: Add support for power supplies
Date: Mon, 28 Jan 2019 15:22:09 +0800 [thread overview]
Message-ID: <786247a4-81d1-9c2e-21b5-258dc818ccb9@nvidia.com> (raw)
In-Reply-To: <20190125112525.10697-4-thierry.reding@gmail.com>
Hi Thierry,
I think any non-zero return value of
regulator_bulk_enable()/devm_regulator_bulk_get() means error.
Thanks,
JC
On 1/25/19 7:25 PM, Thierry Reding wrote:
> From: Thierry Reding <treding@nvidia.com>
>
> Support enabling various supplies needed to provide power to the PLLs
> and logic used to drive the USB, PCI and SATA pads.
>
> Signed-off-by: Thierry Reding <treding@nvidia.com>
> ---
> drivers/phy/tegra/xusb.c | 34 +++++++++++++++++++++++++++++++++-
> drivers/phy/tegra/xusb.h | 5 +++++
> 2 files changed, 38 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c
> index 57a2d08ef6da..e510629f4f1c 100644
> --- a/drivers/phy/tegra/xusb.c
> +++ b/drivers/phy/tegra/xusb.c
> @@ -864,6 +864,7 @@ static int tegra_xusb_padctl_probe(struct platform_device *pdev)
> struct tegra_xusb_padctl *padctl;
> const struct of_device_id *match;
> struct resource *res;
> + unsigned int i;
> int err;
>
> /* for backwards compatibility with old device trees */
> @@ -901,14 +902,38 @@ static int tegra_xusb_padctl_probe(struct platform_device *pdev)
> goto remove;
> }
>
> + padctl->supplies = devm_kcalloc(&pdev->dev, padctl->soc->num_supplies,
> + sizeof(*padctl->supplies), GFP_KERNEL);
> + if (!padctl->supplies) {
> + err = -ENOMEM;
> + goto remove;
> + }
> +
> + for (i = 0; i < padctl->soc->num_supplies; i++)
> + padctl->supplies[i].supply = padctl->soc->supply_names[i];
> +
> + err = devm_regulator_bulk_get(&pdev->dev, padctl->soc->num_supplies,
> + padctl->supplies);
> + if (err < 0) {
> + dev_err(&pdev->dev, "failed to get regulators: %d\n", err);
> + goto remove;
> + }
> +
> err = reset_control_deassert(padctl->rst);
> if (err < 0)
> goto remove;
>
> + err = regulator_bulk_enable(padctl->soc->num_supplies,
> + padctl->supplies);
> + if (err < 0) {
> + dev_err(&pdev->dev, "failed to enable supplies: %d\n", err);
> + goto reset;
> + }
> +
> err = tegra_xusb_setup_pads(padctl);
> if (err < 0) {
> dev_err(&pdev->dev, "failed to setup pads: %d\n", err);
> - goto reset;
> + goto power_down;
> }
>
> err = tegra_xusb_setup_ports(padctl);
> @@ -921,6 +946,8 @@ static int tegra_xusb_padctl_probe(struct platform_device *pdev)
>
> remove_pads:
> tegra_xusb_remove_pads(padctl);
> +power_down:
> + regulator_bulk_disable(padctl->soc->num_supplies, padctl->supplies);
> reset:
> reset_control_assert(padctl->rst);
> remove:
> @@ -936,6 +963,11 @@ static int tegra_xusb_padctl_remove(struct platform_device *pdev)
> tegra_xusb_remove_ports(padctl);
> tegra_xusb_remove_pads(padctl);
>
> + err = regulator_bulk_disable(padctl->soc->num_supplies,
> + padctl->supplies);
> + if (err < 0)
> + dev_err(&pdev->dev, "failed to disable supplies: %d\n", err);
> +
> err = reset_control_assert(padctl->rst);
> if (err < 0)
> dev_err(&pdev->dev, "failed to assert reset: %d\n", err);
> diff --git a/drivers/phy/tegra/xusb.h b/drivers/phy/tegra/xusb.h
> index bb60fc09c752..5d5d22f6cb41 100644
> --- a/drivers/phy/tegra/xusb.h
> +++ b/drivers/phy/tegra/xusb.h
> @@ -370,6 +370,9 @@ struct tegra_xusb_padctl_soc {
> } ports;
>
> const struct tegra_xusb_padctl_ops *ops;
> +
> + const char * const *supply_names;
> + unsigned int num_supplies;
> };
>
> struct tegra_xusb_padctl {
> @@ -393,6 +396,8 @@ struct tegra_xusb_padctl {
> unsigned int enable;
>
> struct clk *clk;
> +
> + struct regulator_bulk_data *supplies;
> };
>
> static inline void padctl_writel(struct tegra_xusb_padctl *padctl, u32 value,
next prev parent reply other threads:[~2019-01-28 7:22 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-25 11:25 [PATCH 1/5] dt-bindings: phy: tegra: Add Tegra186 support Thierry Reding
2019-01-25 11:25 ` [PATCH 2/5] phy: tegra: xusb: Skip single function lane programming Thierry Reding
2019-01-28 7:06 ` jckuo
2019-01-25 11:25 ` [PATCH 3/5] phy: tegra: xusb: Parse dual-role mode property Thierry Reding
2019-01-28 7:08 ` jckuo
2019-01-25 11:25 ` [PATCH 4/5] phy: tegra: xusb: Add support for power supplies Thierry Reding
2019-01-28 7:22 ` jckuo [this message]
2019-01-28 8:00 ` Thierry Reding
2019-01-29 6:50 ` jckuo
2019-02-05 12:55 ` Kishon Vijay Abraham I
2019-02-07 11:11 ` Thierry Reding
2019-01-25 11:25 ` [PATCH 5/5] phy: tegra: xusb: Add Tegra186 support Thierry Reding
2019-01-28 7:45 ` jckuo
2019-02-07 11:47 ` Kishon Vijay Abraham I
2019-02-07 12:17 ` Thierry Reding
2019-01-28 7:04 ` [PATCH 1/5] dt-bindings: phy: tegra: " jckuo
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