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Message-ID: <20200310194154.GN264362@yoga>
Date: Tue, 10 Mar 2020 12:41:54 -0700
From: Bjorn Andersson <bjorn.andersson@...aro.org>
To: Stephen Boyd <swboyd@...omium.org>
Cc: Wolfram Sang <wsa@...-dreams.de>, linux-kernel@...r.kernel.org,
Andy Gross <agross@...nel.org>, linux-i2c@...r.kernel.org,
linux-arm-msm@...r.kernel.org, Alok Chauhan <alokc@...eaurora.org>,
Douglas Anderson <dianders@...omium.org>,
Brendan Higgins <brendanhiggins@...gle.com>
Subject: Re: [PATCH v2 2/3] i2c: qcom-geni: Grow a dev pointer to simplify
code
On Tue 10 Mar 08:43 PDT 2020, Stephen Boyd wrote:
> Some lines are long here. Use a struct dev pointer to shorten lines and
> simplify code. The clk_get() call can fail because of EPROBE_DEFER
> problems too, so just remove the error print message because it isn't
> useful. Finally, platform_get_irq() already prints an error so just
> remove that error message.
>
> Cc: Alok Chauhan <alokc@...eaurora.org>
> Reviewed-by: Douglas Anderson <dianders@...omium.org>
> Reviewed-by: Brendan Higgins <brendanhiggins@...gle.com>
> Signed-off-by: Stephen Boyd <swboyd@...omium.org>
> ---
> drivers/i2c/busses/i2c-qcom-geni.c | 57 ++++++++++++++----------------
> 1 file changed, 26 insertions(+), 31 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c
> index 4efca130035a..2f5fb2e83f95 100644
> --- a/drivers/i2c/busses/i2c-qcom-geni.c
> +++ b/drivers/i2c/busses/i2c-qcom-geni.c
> @@ -502,45 +502,40 @@ static int geni_i2c_probe(struct platform_device *pdev)
> struct resource *res;
> u32 proto, tx_depth;
> int ret;
> + struct device *dev = &pdev->dev;
>
> - gi2c = devm_kzalloc(&pdev->dev, sizeof(*gi2c), GFP_KERNEL);
> + gi2c = devm_kzalloc(dev, sizeof(*gi2c), GFP_KERNEL);
> if (!gi2c)
> return -ENOMEM;
>
> - gi2c->se.dev = &pdev->dev;
> - gi2c->se.wrapper = dev_get_drvdata(pdev->dev.parent);
> + gi2c->se.dev = dev;
> + gi2c->se.wrapper = dev_get_drvdata(dev->parent);
> res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> - gi2c->se.base = devm_ioremap_resource(&pdev->dev, res);
> + gi2c->se.base = devm_ioremap_resource(dev, res);
> if (IS_ERR(gi2c->se.base))
> return PTR_ERR(gi2c->se.base);
>
> - gi2c->se.clk = devm_clk_get(&pdev->dev, "se");
> - if (IS_ERR(gi2c->se.clk) && !has_acpi_companion(&pdev->dev)) {
> - ret = PTR_ERR(gi2c->se.clk);
> - dev_err(&pdev->dev, "Err getting SE Core clk %d\n", ret);
Afaict this line would still be useful, although it might need the usual
probe deferral exception(?)
Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
Regards,
Bjorn
> - return ret;
> - }
> + gi2c->se.clk = devm_clk_get(dev, "se");
> + if (IS_ERR(gi2c->se.clk) && !has_acpi_companion(dev))
> + return PTR_ERR(gi2c->se.clk);
>
> - ret = device_property_read_u32(&pdev->dev, "clock-frequency",
> - &gi2c->clk_freq_out);
> + ret = device_property_read_u32(dev, "clock-frequency",
> + &gi2c->clk_freq_out);
> if (ret) {
> - dev_info(&pdev->dev,
> - "Bus frequency not specified, default to 100kHz.\n");
> + dev_info(dev, "Bus frequency not specified, default to 100kHz.\n");
> gi2c->clk_freq_out = KHZ(100);
> }
>
> - if (has_acpi_companion(&pdev->dev))
> - ACPI_COMPANION_SET(&gi2c->adap.dev, ACPI_COMPANION(&pdev->dev));
> + if (has_acpi_companion(dev))
> + ACPI_COMPANION_SET(&gi2c->adap.dev, ACPI_COMPANION(dev));
>
> gi2c->irq = platform_get_irq(pdev, 0);
> - if (gi2c->irq < 0) {
> - dev_err(&pdev->dev, "IRQ error for i2c-geni\n");
> + if (gi2c->irq < 0)
> return gi2c->irq;
> - }
>
> ret = geni_i2c_clk_map_idx(gi2c);
> if (ret) {
> - dev_err(&pdev->dev, "Invalid clk frequency %d Hz: %d\n",
> + dev_err(dev, "Invalid clk frequency %d Hz: %d\n",
> gi2c->clk_freq_out, ret);
> return ret;
> }
> @@ -549,29 +544,29 @@ static int geni_i2c_probe(struct platform_device *pdev)
> init_completion(&gi2c->done);
> spin_lock_init(&gi2c->lock);
> platform_set_drvdata(pdev, gi2c);
> - ret = devm_request_irq(&pdev->dev, gi2c->irq, geni_i2c_irq, 0,
> - dev_name(&pdev->dev), gi2c);
> + ret = devm_request_irq(dev, gi2c->irq, geni_i2c_irq, 0,
> + dev_name(dev), gi2c);
> if (ret) {
> - dev_err(&pdev->dev, "Request_irq failed:%d: err:%d\n",
> + dev_err(dev, "Request_irq failed:%d: err:%d\n",
> gi2c->irq, ret);
> return ret;
> }
> /* Disable the interrupt so that the system can enter low-power mode */
> disable_irq(gi2c->irq);
> i2c_set_adapdata(&gi2c->adap, gi2c);
> - gi2c->adap.dev.parent = &pdev->dev;
> - gi2c->adap.dev.of_node = pdev->dev.of_node;
> + gi2c->adap.dev.parent = dev;
> + gi2c->adap.dev.of_node = dev->of_node;
> strlcpy(gi2c->adap.name, "Geni-I2C", sizeof(gi2c->adap.name));
>
> ret = geni_se_resources_on(&gi2c->se);
> if (ret) {
> - dev_err(&pdev->dev, "Error turning on resources %d\n", ret);
> + dev_err(dev, "Error turning on resources %d\n", ret);
> return ret;
> }
> proto = geni_se_read_proto(&gi2c->se);
> tx_depth = geni_se_get_tx_fifo_depth(&gi2c->se);
> if (proto != GENI_SE_I2C) {
> - dev_err(&pdev->dev, "Invalid proto %d\n", proto);
> + dev_err(dev, "Invalid proto %d\n", proto);
> geni_se_resources_off(&gi2c->se);
> return -ENXIO;
> }
> @@ -581,11 +576,11 @@ static int geni_i2c_probe(struct platform_device *pdev)
> true, true, true);
> ret = geni_se_resources_off(&gi2c->se);
> if (ret) {
> - dev_err(&pdev->dev, "Error turning off resources %d\n", ret);
> + dev_err(dev, "Error turning off resources %d\n", ret);
> return ret;
> }
>
> - dev_dbg(&pdev->dev, "i2c fifo/se-dma mode. fifo depth:%d\n", tx_depth);
> + dev_dbg(dev, "i2c fifo/se-dma mode. fifo depth:%d\n", tx_depth);
>
> gi2c->suspended = 1;
> pm_runtime_set_suspended(gi2c->se.dev);
> @@ -595,12 +590,12 @@ static int geni_i2c_probe(struct platform_device *pdev)
>
> ret = i2c_add_adapter(&gi2c->adap);
> if (ret) {
> - dev_err(&pdev->dev, "Error adding i2c adapter %d\n", ret);
> + dev_err(dev, "Error adding i2c adapter %d\n", ret);
> pm_runtime_disable(gi2c->se.dev);
> return ret;
> }
>
> - dev_dbg(&pdev->dev, "Geni-I2C adaptor successfully added\n");
> + dev_dbg(dev, "Geni-I2C adaptor successfully added\n");
>
> return 0;
> }
> --
> Sent by a computer, using git, on the internet
>
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