From 9f8a3e7fd5bd08e3fd9847c04a5a445e2994f6b3 Mon Sep 17 00:00:00 2001 From: Richard Zhao Date: Mon, 4 Jun 2012 19:04:25 +0800 Subject: [PATCH] i2c: imx: convert to use managed functions - convert to use devm_request_and_ioremap, devm_kzalloc, devm_clk_get, devm_request_irq. - clean up unused variables. Signed-off-by: Richard Zhao Reviewed-by: Shubhrajyoti D Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-imx.c | 71 +++++++++--------------------------- 1 file changed, 18 insertions(+), 53 deletions(-) diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c index 8d6b504d65c4..a93e84650f99 100644 --- a/drivers/i2c/busses/i2c-imx.c +++ b/drivers/i2c/busses/i2c-imx.c @@ -118,10 +118,8 @@ static u16 __initdata i2c_clk_div[50][2] = { struct imx_i2c_struct { struct i2c_adapter adapter; - struct resource *res; struct clk *clk; void __iomem *base; - int irq; wait_queue_head_t queue; unsigned long i2csr; unsigned int disable_delay; @@ -473,7 +471,6 @@ static int __init i2c_imx_probe(struct platform_device *pdev) struct imxi2c_platform_data *pdata = pdev->dev.platform_data; struct pinctrl *pinctrl; void __iomem *base; - resource_size_t res_size; int irq, bitrate; int ret; @@ -490,25 +487,15 @@ static int __init i2c_imx_probe(struct platform_device *pdev) return -ENOENT; } - res_size = resource_size(res); - - if (!request_mem_region(res->start, res_size, DRIVER_NAME)) { - dev_err(&pdev->dev, "request_mem_region failed\n"); + base = devm_request_and_ioremap(&pdev->dev, res); + if (!base) return -EBUSY; - } - - base = ioremap(res->start, res_size); - if (!base) { - dev_err(&pdev->dev, "ioremap failed\n"); - ret = -EIO; - goto fail1; - } - i2c_imx = kzalloc(sizeof(struct imx_i2c_struct), GFP_KERNEL); + i2c_imx = devm_kzalloc(&pdev->dev, sizeof(struct imx_i2c_struct), + GFP_KERNEL); if (!i2c_imx) { dev_err(&pdev->dev, "can't allocate interface\n"); - ret = -ENOMEM; - goto fail2; + return -ENOMEM; } /* Setup i2c_imx driver structure */ @@ -518,29 +505,27 @@ static int __init i2c_imx_probe(struct platform_device *pdev) i2c_imx->adapter.dev.parent = &pdev->dev; i2c_imx->adapter.nr = pdev->id; i2c_imx->adapter.dev.of_node = pdev->dev.of_node; - i2c_imx->irq = irq; i2c_imx->base = base; - i2c_imx->res = res; pinctrl = devm_pinctrl_get_select_default(&pdev->dev); if (IS_ERR(pinctrl)) { - ret = PTR_ERR(pinctrl); - goto fail3; + dev_err(&pdev->dev, "can't get/select pinctrl\n"); + return PTR_ERR(pinctrl); } /* Get I2C clock */ - i2c_imx->clk = clk_get(&pdev->dev, "i2c_clk"); + i2c_imx->clk = devm_clk_get(&pdev->dev, "i2c_clk"); if (IS_ERR(i2c_imx->clk)) { - ret = PTR_ERR(i2c_imx->clk); dev_err(&pdev->dev, "can't get I2C clock\n"); - goto fail3; + return PTR_ERR(i2c_imx->clk); } /* Request IRQ */ - ret = request_irq(i2c_imx->irq, i2c_imx_isr, 0, pdev->name, i2c_imx); + ret = devm_request_irq(&pdev->dev, irq, i2c_imx_isr, 0, + pdev->name, i2c_imx); if (ret) { - dev_err(&pdev->dev, "can't claim irq %d\n", i2c_imx->irq); - goto fail4; + dev_err(&pdev->dev, "can't claim irq %d\n", irq); + return ret; } /* Init queue */ @@ -565,7 +550,7 @@ static int __init i2c_imx_probe(struct platform_device *pdev) ret = i2c_add_numbered_adapter(&i2c_imx->adapter); if (ret < 0) { dev_err(&pdev->dev, "registration failed\n"); - goto fail5; + return ret; } of_i2c_register_devices(&i2c_imx->adapter); @@ -573,28 +558,16 @@ static int __init i2c_imx_probe(struct platform_device *pdev) /* Set up platform driver data */ platform_set_drvdata(pdev, i2c_imx); - dev_dbg(&i2c_imx->adapter.dev, "claimed irq %d\n", i2c_imx->irq); + dev_dbg(&i2c_imx->adapter.dev, "claimed irq %d\n", irq); dev_dbg(&i2c_imx->adapter.dev, "device resources from 0x%x to 0x%x\n", - i2c_imx->res->start, i2c_imx->res->end); - dev_dbg(&i2c_imx->adapter.dev, "allocated %d bytes at 0x%x \n", - res_size, i2c_imx->res->start); + res->start, res->end); + dev_dbg(&i2c_imx->adapter.dev, "allocated %d bytes at 0x%x\n", + resource_size(res), res->start); dev_dbg(&i2c_imx->adapter.dev, "adapter name: \"%s\"\n", i2c_imx->adapter.name); dev_dbg(&i2c_imx->adapter.dev, "IMX I2C adapter registered\n"); return 0; /* Return OK */ - -fail5: - free_irq(i2c_imx->irq, i2c_imx); -fail4: - clk_put(i2c_imx->clk); -fail3: - kfree(i2c_imx); -fail2: - iounmap(base); -fail1: - release_mem_region(res->start, resource_size(res)); - return ret; /* Return error number */ } static int __exit i2c_imx_remove(struct platform_device *pdev) @@ -606,20 +579,12 @@ static int __exit i2c_imx_remove(struct platform_device *pdev) i2c_del_adapter(&i2c_imx->adapter); platform_set_drvdata(pdev, NULL); - /* free interrupt */ - free_irq(i2c_imx->irq, i2c_imx); - /* setup chip registers to defaults */ writeb(0, i2c_imx->base + IMX_I2C_IADR); writeb(0, i2c_imx->base + IMX_I2C_IFDR); writeb(0, i2c_imx->base + IMX_I2C_I2CR); writeb(0, i2c_imx->base + IMX_I2C_I2SR); - clk_put(i2c_imx->clk); - - iounmap(i2c_imx->base); - release_mem_region(i2c_imx->res->start, resource_size(i2c_imx->res)); - kfree(i2c_imx); return 0; } -- 2.39.5