diff options
author | Dmitry Osipenko <digetx@gmail.com> | 2020-09-30 01:18:57 +0300 |
---|---|---|
committer | Wolfram Sang <wsa@kernel.org> | 2020-10-05 23:57:41 +0300 |
commit | 55c52f16a017ca3b1546709f8cfa5a4c856926eb (patch) | |
tree | 251bc3c51df5795fa8a0ce6ad617778129aca815 /drivers/i2c/busses/i2c-tegra.c | |
parent | 6fe3e2015faaf85e4c81b86f733316820e4af249 (diff) | |
download | linux-55c52f16a017ca3b1546709f8cfa5a4c856926eb.tar.xz |
i2c: tegra: Clean up probe function
The driver's probe function code is a bit difficult to read. This patch
reorders code of the probe function, forming groups of code that are easy
to work with. The probe tear-down order now matches the driver-removal
order.
Reviewed-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Diffstat (limited to 'drivers/i2c/busses/i2c-tegra.c')
-rw-r--r-- | drivers/i2c/busses/i2c-tegra.c | 100 |
1 files changed, 49 insertions, 51 deletions
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index 9486fcba655c..56981a5506ae 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -440,6 +440,9 @@ static int tegra_i2c_init_dma(struct tegra_i2c_dev *i2c_dev) i2c_dev->tx_dma_chan = chan; + i2c_dev->dma_buf_size = i2c_dev->hw->quirks->max_write_len + + I2C_PACKET_HEADER_SIZE; + dma_buf = dma_alloc_coherent(i2c_dev->dev, i2c_dev->dma_buf_size, &dma_phys, GFP_KERNEL | __GFP_NOWARN); if (!dma_buf) { @@ -1694,34 +1697,42 @@ static int tegra_i2c_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct tegra_i2c_dev *i2c_dev; struct resource *res; - void __iomem *base; - phys_addr_t base_phys; - int irq; int ret; - base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); - if (IS_ERR(base)) - return PTR_ERR(base); - - base_phys = res->start; - - irq = platform_get_irq(pdev, 0); - if (irq < 0) - return irq; - i2c_dev = devm_kzalloc(&pdev->dev, sizeof(*i2c_dev), GFP_KERNEL); if (!i2c_dev) return -ENOMEM; - i2c_dev->base = base; - i2c_dev->base_phys = base_phys; - i2c_dev->adapter.algo = &tegra_i2c_algo; - i2c_dev->adapter.retries = 1; - i2c_dev->adapter.timeout = 6 * HZ; - i2c_dev->irq = irq; + platform_set_drvdata(pdev, i2c_dev); + + init_completion(&i2c_dev->msg_complete); + init_completion(&i2c_dev->dma_complete); + + i2c_dev->hw = of_device_get_match_data(&pdev->dev); i2c_dev->cont_id = pdev->id; i2c_dev->dev = &pdev->dev; + i2c_dev->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); + if (IS_ERR(i2c_dev->base)) + return PTR_ERR(i2c_dev->base); + + i2c_dev->base_phys = res->start; + + ret = platform_get_irq(pdev, 0); + if (ret < 0) + return ret; + + i2c_dev->irq = ret; + + /* interrupt will be enabled during of transfer time */ + irq_set_status_flags(i2c_dev->irq, IRQ_NOAUTOEN); + + ret = devm_request_irq(&pdev->dev, i2c_dev->irq, tegra_i2c_isr, + IRQF_NO_SUSPEND, dev_name(&pdev->dev), + i2c_dev); + if (ret) + return ret; + i2c_dev->rst = devm_reset_control_get_exclusive(&pdev->dev, "i2c"); if (IS_ERR(i2c_dev->rst)) { dev_err_probe(&pdev->dev, PTR_ERR(i2c_dev->rst), @@ -1735,14 +1746,9 @@ static int tegra_i2c_probe(struct platform_device *pdev) if (ret) return ret; - i2c_dev->hw = of_device_get_match_data(&pdev->dev); - i2c_dev->adapter.quirks = i2c_dev->hw->quirks; - i2c_dev->dma_buf_size = i2c_dev->adapter.quirks->max_write_len + - I2C_PACKET_HEADER_SIZE; - init_completion(&i2c_dev->msg_complete); - init_completion(&i2c_dev->dma_complete); - - platform_set_drvdata(pdev, i2c_dev); + ret = tegra_i2c_init_dma(i2c_dev); + if (ret) + goto release_clocks; /* * VI I2C is in VE power domain which is not always on and not @@ -1760,49 +1766,41 @@ static int tegra_i2c_probe(struct platform_device *pdev) goto put_rpm; } - if (i2c_dev->hw->supports_bus_clear) - i2c_dev->adapter.bus_recovery_info = &tegra_i2c_recovery_info; - - ret = tegra_i2c_init_dma(i2c_dev); - if (ret < 0) - goto put_rpm; - ret = tegra_i2c_init(i2c_dev); - if (ret) { - dev_err(&pdev->dev, "Failed to initialize i2c controller\n"); - goto release_dma; - } - - irq_set_status_flags(i2c_dev->irq, IRQ_NOAUTOEN); - - ret = devm_request_irq(&pdev->dev, i2c_dev->irq, tegra_i2c_isr, - IRQF_NO_SUSPEND, dev_name(&pdev->dev), i2c_dev); if (ret) - goto release_dma; + goto put_rpm; i2c_set_adapdata(&i2c_dev->adapter, i2c_dev); + i2c_dev->adapter.dev.of_node = pdev->dev.of_node; + i2c_dev->adapter.dev.parent = &pdev->dev; + i2c_dev->adapter.retries = 1; + i2c_dev->adapter.timeout = 6 * HZ; + i2c_dev->adapter.quirks = i2c_dev->hw->quirks; i2c_dev->adapter.owner = THIS_MODULE; i2c_dev->adapter.class = I2C_CLASS_DEPRECATED; + i2c_dev->adapter.algo = &tegra_i2c_algo; + i2c_dev->adapter.nr = pdev->id; + + if (i2c_dev->hw->supports_bus_clear) + i2c_dev->adapter.bus_recovery_info = &tegra_i2c_recovery_info; + strlcpy(i2c_dev->adapter.name, dev_name(&pdev->dev), sizeof(i2c_dev->adapter.name)); - i2c_dev->adapter.dev.parent = &pdev->dev; - i2c_dev->adapter.nr = pdev->id; - i2c_dev->adapter.dev.of_node = pdev->dev.of_node; ret = i2c_add_numbered_adapter(&i2c_dev->adapter); if (ret) - goto release_dma; + goto put_rpm; pm_runtime_put(&pdev->dev); return 0; -release_dma: - tegra_i2c_release_dma(i2c_dev); - put_rpm: pm_runtime_put_sync(&pdev->dev); pm_runtime_disable(&pdev->dev); + + tegra_i2c_release_dma(i2c_dev); +release_clocks: tegra_i2c_release_clocks(i2c_dev); return ret; |