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usb: gadget: udc: lpc32xx: simplify probe
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Simplify .probe and .remove by using devm managed allocations and requests.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
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Alexandre Belloni authored and Felipe Balbi committed May 3, 2019
1 parent 1e86854 commit 408b56c
Showing 1 changed file with 25 additions and 68 deletions.
93 changes: 25 additions & 68 deletions drivers/usb/gadget/udc/lpc32xx_udc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -129,8 +129,6 @@ struct lpc32xx_udc {

/* Board and device specific */
struct lpc32xx_usbd_cfg *board;
u32 io_p_start;
u32 io_p_size;
void __iomem *udp_baseaddr;
int udp_irq[4];
struct clk *usb_slv_clk;
Expand Down Expand Up @@ -2999,7 +2997,7 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
dma_addr_t dma_handle;
struct device_node *isp1301_node;

udc = kmemdup(&controller_template, sizeof(*udc), GFP_KERNEL);
udc = devm_kmemdup(dev, &controller_template, sizeof(*udc), GFP_KERNEL);
if (!udc)
return -ENOMEM;

Expand All @@ -3022,8 +3020,7 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)

udc->isp1301_i2c_client = isp1301_get_client(isp1301_node);
if (!udc->isp1301_i2c_client) {
retval = -EPROBE_DEFER;
goto phy_fail;
return -EPROBE_DEFER;
}

dev_info(udc->dev, "ISP1301 I2C device at address 0x%x\n",
Expand All @@ -3032,7 +3029,7 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
pdev->dev.dma_mask = &lpc32xx_usbd_dmamask;
retval = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
if (retval)
goto resource_fail;
return retval;

udc->board = &lpc32xx_usbddata;

Expand All @@ -3045,10 +3042,8 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
* IORESOURCE_IRQ, USB transceiver interrupt number
*/
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
retval = -ENXIO;
goto resource_fail;
}
if (!res)
return -ENXIO;

spin_lock_init(&udc->lock);

Expand All @@ -3058,39 +3053,28 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
if (udc->udp_irq[i] < 0) {
dev_err(udc->dev,
"irq resource %d not available!\n", i);
retval = udc->udp_irq[i];
goto irq_fail;
return udc->udp_irq[i];
}
}

udc->io_p_start = res->start;
udc->io_p_size = resource_size(res);
if (!request_mem_region(udc->io_p_start, udc->io_p_size, driver_name)) {
dev_err(udc->dev, "someone's using UDC memory\n");
retval = -EBUSY;
goto request_mem_region_fail;
}

udc->udp_baseaddr = ioremap(udc->io_p_start, udc->io_p_size);
udc->udp_baseaddr = devm_ioremap_resource(dev, res);
if (!udc->udp_baseaddr) {
retval = -ENOMEM;
dev_err(udc->dev, "IO map failure\n");
goto io_map_fail;
return -ENOMEM;
}

/* Get USB device clock */
udc->usb_slv_clk = clk_get(&pdev->dev, NULL);
udc->usb_slv_clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(udc->usb_slv_clk)) {
dev_err(udc->dev, "failed to acquire USB device clock\n");
retval = PTR_ERR(udc->usb_slv_clk);
goto usb_clk_get_fail;
return PTR_ERR(udc->usb_slv_clk);
}

/* Enable USB device clock */
retval = clk_prepare_enable(udc->usb_slv_clk);
if (retval < 0) {
dev_err(udc->dev, "failed to start USB device clock\n");
goto usb_clk_enable_fail;
return retval;
}

/* Setup deferred workqueue data */
Expand Down Expand Up @@ -3134,37 +3118,37 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)

/* Request IRQs - low and high priority USB device IRQs are routed to
* the same handler, while the DMA interrupt is routed elsewhere */
retval = request_irq(udc->udp_irq[IRQ_USB_LP], lpc32xx_usb_lp_irq,
0, "udc_lp", udc);
retval = devm_request_irq(dev, udc->udp_irq[IRQ_USB_LP],
lpc32xx_usb_lp_irq, 0, "udc_lp", udc);
if (retval < 0) {
dev_err(udc->dev, "LP request irq %d failed\n",
udc->udp_irq[IRQ_USB_LP]);
goto irq_lp_fail;
goto irq_req_fail;
}
retval = request_irq(udc->udp_irq[IRQ_USB_HP], lpc32xx_usb_hp_irq,
0, "udc_hp", udc);
retval = devm_request_irq(dev, udc->udp_irq[IRQ_USB_HP],
lpc32xx_usb_hp_irq, 0, "udc_hp", udc);
if (retval < 0) {
dev_err(udc->dev, "HP request irq %d failed\n",
udc->udp_irq[IRQ_USB_HP]);
goto irq_hp_fail;
goto irq_req_fail;
}

retval = request_irq(udc->udp_irq[IRQ_USB_DEVDMA],
lpc32xx_usb_devdma_irq, 0, "udc_dma", udc);
retval = devm_request_irq(dev, udc->udp_irq[IRQ_USB_DEVDMA],
lpc32xx_usb_devdma_irq, 0, "udc_dma", udc);
if (retval < 0) {
dev_err(udc->dev, "DEV request irq %d failed\n",
udc->udp_irq[IRQ_USB_DEVDMA]);
goto irq_dev_fail;
goto irq_req_fail;
}

/* The transceiver interrupt is used for VBUS detection and will
kick off the VBUS handler function */
retval = request_irq(udc->udp_irq[IRQ_USB_ATX], lpc32xx_usb_vbus_irq,
0, "udc_otg", udc);
retval = devm_request_irq(dev, udc->udp_irq[IRQ_USB_ATX],
lpc32xx_usb_vbus_irq, 0, "udc_otg", udc);
if (retval < 0) {
dev_err(udc->dev, "VBUS request irq %d failed\n",
udc->udp_irq[IRQ_USB_ATX]);
goto irq_xcvr_fail;
goto irq_req_fail;
}

/* Initialize wait queue */
Expand All @@ -3190,32 +3174,15 @@ static int lpc32xx_udc_probe(struct platform_device *pdev)
return 0;

add_gadget_fail:
free_irq(udc->udp_irq[IRQ_USB_ATX], udc);
irq_xcvr_fail:
free_irq(udc->udp_irq[IRQ_USB_DEVDMA], udc);
irq_dev_fail:
free_irq(udc->udp_irq[IRQ_USB_HP], udc);
irq_hp_fail:
free_irq(udc->udp_irq[IRQ_USB_LP], udc);
irq_lp_fail:
irq_req_fail:
dma_pool_destroy(udc->dd_cache);
dma_alloc_fail:
dma_free_coherent(&pdev->dev, UDCA_BUFF_SIZE,
udc->udca_v_base, udc->udca_p_base);
i2c_fail:
clk_disable_unprepare(udc->usb_slv_clk);
usb_clk_enable_fail:
clk_put(udc->usb_slv_clk);
usb_clk_get_fail:
iounmap(udc->udp_baseaddr);
io_map_fail:
release_mem_region(udc->io_p_start, udc->io_p_size);
dev_err(udc->dev, "%s probe failed, %d\n", driver_name, retval);
request_mem_region_fail:
irq_fail:
resource_fail:
phy_fail:
kfree(udc);

return retval;
}

Expand All @@ -3231,24 +3198,14 @@ static int lpc32xx_udc_remove(struct platform_device *pdev)
udc_disable(udc);
pullup(udc, 0);

free_irq(udc->udp_irq[IRQ_USB_ATX], udc);

device_init_wakeup(&pdev->dev, 0);
remove_debug_file(udc);

dma_pool_destroy(udc->dd_cache);
dma_free_coherent(&pdev->dev, UDCA_BUFF_SIZE,
udc->udca_v_base, udc->udca_p_base);
free_irq(udc->udp_irq[IRQ_USB_DEVDMA], udc);
free_irq(udc->udp_irq[IRQ_USB_HP], udc);
free_irq(udc->udp_irq[IRQ_USB_LP], udc);

clk_disable_unprepare(udc->usb_slv_clk);
clk_put(udc->usb_slv_clk);

iounmap(udc->udp_baseaddr);
release_mem_region(udc->io_p_start, udc->io_p_size);
kfree(udc);

return 0;
}
Expand Down

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