From: Philipp Zabel <p.zabel@pengutronix.de>
To: Minda Chen <minda.chen@starfivetech.com>,
Emil Renner Berthing <emil.renner.berthing@canonical.com>,
Conor Dooley <conor@kernel.org>, Vinod Koul <vkoul@kernel.org>,
Kishon Vijay Abraham I <kishon@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Pawel Laszczak <pawell@cadence.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Peter Chen <peter.chen@kernel.org>,
Roger Quadros <rogerq@kernel.org>
Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-phy@lists.infradead.org, linux-usb@vger.kernel.org,
linux-riscv@lists.infradead.org,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>
Subject: Re: [PATCH v3 4/5] usb: cdns3: add StarFive JH7110 USB driver.
Date: Thu, 23 Mar 2023 10:29:37 +0100 [thread overview]
Message-ID: <2c99725a0bf259203a5b00f4c752eeb1b6596f59.camel@pengutronix.de> (raw)
In-Reply-To: <20230315104411.73614-5-minda.chen@starfivetech.com>
On Mi, 2023-03-15 at 18:44 +0800, Minda Chen wrote:
> There is a Cadence USB3 core for JH7110 SoCs, the cdns
> core is the child of this USB wrapper module device.
>
> Signed-off-by: Minda Chen <minda.chen@starfivetech.com>
> ---
[...]
> diff --git a/drivers/usb/cdns3/cdns3-starfive.c b/drivers/usb/cdns3/cdns3-starfive.c
> new file mode 100644
> index 000000000000..a99f98f85235
> --- /dev/null
> +++ b/drivers/usb/cdns3/cdns3-starfive.c
> @@ -0,0 +1,305 @@
[...]
> +static int cdns_clk_rst_init(struct cdns_starfive *data)
> +{
> + int ret;
> +
> + data->num_clks = devm_clk_bulk_get_all(data->dev, &data->clks);
> + if (data->num_clks < 0)
> + return dev_err_probe(data->dev, -ENODEV,
> + "Failed to get clocks\n");
> +
> + ret = clk_bulk_prepare_enable(data->num_clks, data->clks);
> + if (ret)
> + return dev_err_probe(data->dev, ret,
> + "failed to enable clocks\n");
In general, it's better to acquire all resources first and only then
start interacting with them, and to order all devm_ calls before non-
devm calls to make sure cleanup is done in reverse order.
In this case you can switch clk_bulk_prepare_enable() with
devm_reset_control_array_get_exclusive() and simplify the error path.
> + data->resets = devm_reset_control_array_get_exclusive(data->dev);
> + if (IS_ERR(data->resets)) {
> + ret = dev_err_probe(data->dev, PTR_ERR(data->resets),
> + "Failed to get resets");
> + goto err_clk_init;
> + }
> +
> + ret = reset_control_deassert(data->resets);
> + if (ret) {
> + ret = dev_err_probe(data->dev, ret,
> + "failed to reset clocks\n");
> + goto err_clk_init;
> + }
> +
> + return ret;
> +
> +err_clk_init:
> + clk_bulk_disable_unprepare(data->num_clks, data->clks);
> + return ret;
> +}
regards
Philipp
next prev parent reply other threads:[~2023-03-23 9:33 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-15 10:44 [PATCH v3 0/5] Add JH7110 USB and USB PHY driver support Minda Chen
2023-03-15 10:44 ` [PATCH v3 1/5] dt-bindings: phy: Add StarFive JH7110 USB/PCIe document Minda Chen
2023-03-17 8:39 ` Krzysztof Kozlowski
2023-03-17 10:29 ` Minda Chen
2023-03-15 10:44 ` [PATCH v3 2/5] phy: starfive: add JH7110 PCIE 2.0 and USB 2.0 PHY driver Minda Chen
2023-03-20 8:55 ` Vinod Koul
2023-03-20 11:00 ` Minda Chen
2023-03-15 10:44 ` [PATCH v3 3/5] dt-binding: Add JH7110 USB wrapper layer doc Minda Chen
2023-03-16 2:43 ` Peter Chen
2023-03-17 8:43 ` Krzysztof Kozlowski
2023-03-17 10:30 ` Minda Chen
2023-03-23 9:23 ` Philipp Zabel
2023-03-27 11:04 ` Minda Chen
2023-03-15 10:44 ` [PATCH v3 4/5] usb: cdns3: add StarFive JH7110 USB driver Minda Chen
2023-03-15 13:32 ` Dongliang Mu
2023-03-16 11:17 ` Minda Chen
2023-03-16 2:46 ` Peter Chen
2023-03-16 11:16 ` Minda Chen
2023-03-20 15:26 ` Rob Herring
2023-03-21 11:50 ` Minda Chen
2023-03-23 9:29 ` Philipp Zabel [this message]
2023-03-27 11:04 ` Minda Chen
2023-03-15 10:44 ` [PATCH v3 5/5] dts: usb: add StarFive JH7110 USB dts configuration Minda Chen
2023-03-16 2:43 ` Peter Chen
2023-03-16 3:02 ` Minda Chen
2023-03-17 8:44 ` Krzysztof Kozlowski
2023-03-17 10:59 ` Minda Chen
2023-03-20 15:34 ` Rob Herring
2023-03-21 12:35 ` Minda Chen
2023-03-22 8:00 ` Roger Quadros
2023-03-22 10:50 ` Minda Chen
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