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Date: Fri, 25 Feb 2011 10:25:22 -0800
From: Stephen Neuendorffer <stephen.neuendorffer@...inx.com>
To: Grant Likely <grant.likely@...retlab.ca>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
<devicetree-discuss@...ts.ozlabs.org>, <sfr@...b.auug.org.au>,
<linux-kernel@...r.kernel.org>, <davem@...emloft.net>
CC: <sparclinux@...r.kernel.org>, <linuxppc-dev@...ts.ozlabs.org>
Subject: RE: [RFC PATCH 06/15] dt: xilinx_hwicap: merge platform and of_platformdriver bindings
Minor nit below
Acked-by: Stephen Neuendorffer <stephen.neuendorffer@...inx.com>
Steve
> -----Original Message-----
> From: linuxppc-dev-bounces+stephen=neuendorffer.name@...ts.ozlabs.org
[mailto:linuxppc-dev-
> bounces+stephen=neuendorffer.name@...ts.ozlabs.org] On Behalf Of Grant
Likely
> Sent: Tuesday, February 22, 2011 8:34 PM
> To: Benjamin Herrenschmidt; devicetree-discuss@...ts.ozlabs.org;
sfr@...b.auug.org.au; linux-
> kernel@...r.kernel.org; davem@...emloft.net
> Cc: sparclinux@...r.kernel.org; linuxppc-dev@...ts.ozlabs.org
> Subject: [RFC PATCH 06/15] dt: xilinx_hwicap: merge platform and
of_platformdriver bindings
>
> of_platform_driver is getting removed, and a single platform_driver
> can now support both devicetree and non-devicetree use cases. This
> patch merges the two driver registrations.
>
> Signed-off-by: Grant Likely <grant.likely@...retlab.ca>
> ---
> drivers/char/xilinx_hwicap/xilinx_hwicap.c | 129
+++++++++++-----------------
> 1 files changed, 49 insertions(+), 80 deletions(-)
>
> diff --git a/drivers/char/xilinx_hwicap/xilinx_hwicap.c
b/drivers/char/xilinx_hwicap/xilinx_hwicap.c
> index 9f2272e..a55e877 100644
> --- a/drivers/char/xilinx_hwicap/xilinx_hwicap.c
> +++ b/drivers/char/xilinx_hwicap/xilinx_hwicap.c
> @@ -714,20 +714,29 @@ static int __devexit hwicap_remove(struct device
*dev)
> return 0; /* success */
> }
>
> -static int __devinit hwicap_drv_probe(struct platform_device *pdev)
> +#ifdef CONFIG_OF
> +static int __devinit hwicap_of_probe(struct platform_device *op)
> {
> - struct resource *res;
> - const struct config_registers *regs;
> + struct resource res;
> + const unsigned int *id;
> const char *family;
> + int rc;
> + const struct hwicap_driver_config *config =
op->dev.of_match->data;
> + const struct config_registers *regs;
>
> - res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> - if (!res)
> - return -ENODEV;
> +
> + rc = of_address_to_resource(op->dev.of_node, 0, &res);
> + if (rc) {
> + dev_err(&op->dev, "invalid address\n");
> + return rc;
> + }
> +
> + id = of_get_property(op->dev.of_node, "port-number", NULL);
>
> /* It's most likely that we're using V4, if the family is not
> specified */
> regs = &v4_config_registers;
> - family = pdev->dev.platform_data;
> + family = of_get_property(op->dev.of_node, "xlnx,family", NULL);
>
> if (family) {
> if (!strcmp(family, "virtex2p")) {
> @@ -738,54 +747,33 @@ static int __devinit hwicap_drv_probe(struct
platform_device *pdev)
> regs = &v5_config_registers;
> }
> }
> -
> - return hwicap_setup(&pdev->dev, pdev->id, res,
> - &buffer_icap_config, regs);
> + return hwicap_setup(&op->dev, id ? *id : -1, &res, config,
> + regs);
> }
> -
> -static int __devexit hwicap_drv_remove(struct platform_device *pdev)
> +#else
> +static inline int hwicap_of_probe(struct platform_device *op)
> {
> - return hwicap_remove(&pdev->dev);
> + return -EINVAL;
> }
> +#endif /* CONFIG_OF */
>
> -static struct platform_driver hwicap_platform_driver = {
> - .probe = hwicap_drv_probe,
> - .remove = hwicap_drv_remove,
> - .driver = {
> - .owner = THIS_MODULE,
> - .name = DRIVER_NAME,
> - },
> -};
> -
> -/*
---------------------------------------------------------------------
> - * OF bus binding
> - */
> -
> -#if defined(CONFIG_OF)
> -static int __devinit
> -hwicap_of_probe(struct platform_device *op, const struct of_device_id
*match)
> +static int __devinit hwicap_drv_probe(struct platform_device *pdev)
> {
> - struct resource res;
> - const unsigned int *id;
> - const char *family;
> - int rc;
> - const struct hwicap_driver_config *config = match->data;
> + struct resource *res;
> const struct config_registers *regs;
> + const char *family;
>
> - dev_dbg(&op->dev, "hwicap_of_probe(%p, %p)\n", op, match);
> -
> - rc = of_address_to_resource(op->dev.of_node, 0, &res);
> - if (rc) {
> - dev_err(&op->dev, "invalid address\n");
> - return rc;
> - }
> + if (pdev->dev.of_match)
> + return hwicap_of_probe(pdev);
>
> - id = of_get_property(op->dev.of_node, "port-number", NULL);
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (!res)
> + return -ENODEV;
>
> /* It's most likely that we're using V4, if the family is not
> specified */
> regs = &v4_config_registers;
> - family = of_get_property(op->dev.of_node, "xlnx,family", NULL);
> + family = pdev->dev.platform_data;
>
> if (family) {
> if (!strcmp(family, "virtex2p")) {
> @@ -796,15 +784,17 @@ hwicap_of_probe(struct platform_device *op,
const struct of_device_id *match)
> regs = &v5_config_registers;
> }
> }
> - return hwicap_setup(&op->dev, id ? *id : -1, &res, config,
> - regs);
> +
> + return hwicap_setup(&pdev->dev, pdev->id, res,
> + &buffer_icap_config, regs);
> }
>
> -static int __devexit hwicap_of_remove(struct platform_device *op)
> +static int __devexit hwicap_drv_remove(struct platform_device *pdev)
> {
> - return hwicap_remove(&op->dev);
> + return hwicap_remove(&pdev->dev);
> }
>
> +#ifdef CONFIG_OF
> /* Match table for of_platform binding */
Does the comment still make sense?
> static const struct of_device_id __devinitconst hwicap_of_match[] = {
> { .compatible = "xlnx,opb-hwicap-1.00.b", .data =
&buffer_icap_config},
> @@ -812,33 +802,23 @@ static const struct of_device_id __devinitconst
hwicap_of_match[] = {
> {},
> };
> MODULE_DEVICE_TABLE(of, hwicap_of_match);
> +#else
> +#define hwicap_of_match NULL
> +#endif
>
> -static struct of_platform_driver hwicap_of_driver = {
> - .probe = hwicap_of_probe,
> - .remove = __devexit_p(hwicap_of_remove),
> +static struct platform_driver hwicap_platform_driver = {
> + .probe = hwicap_drv_probe,
> + .remove = hwicap_drv_remove,
> .driver = {
> - .name = DRIVER_NAME,
> .owner = THIS_MODULE,
> + .name = DRIVER_NAME,
> .of_match_table = hwicap_of_match,
> },
> };
>
> -/* Registration helpers to keep the number of #ifdefs to a minimum */
> -static inline int __init hwicap_of_register(void)
> -{
> - pr_debug("hwicap: calling of_register_platform_driver()\n");
> - return of_register_platform_driver(&hwicap_of_driver);
> -}
> -
> -static inline void __exit hwicap_of_unregister(void)
> -{
> - of_unregister_platform_driver(&hwicap_of_driver);
> -}
> -#else /* CONFIG_OF */
> -/* CONFIG_OF not enabled; do nothing helpers */
> -static inline int __init hwicap_of_register(void) { return 0; }
> -static inline void __exit hwicap_of_unregister(void) { }
> -#endif /* CONFIG_OF */
> +/*
---------------------------------------------------------------------
> + * OF bus binding
> + */
>
> static int __init hwicap_module_init(void)
> {
> @@ -856,21 +836,12 @@ static int __init hwicap_module_init(void)
> return retval;
>
> retval = platform_driver_register(&hwicap_platform_driver);
> -
> - if (retval)
> - goto failed1;
> -
> - retval = hwicap_of_register();
> -
> if (retval)
> - goto failed2;
> + goto failed;
>
> return retval;
>
> - failed2:
> - platform_driver_unregister(&hwicap_platform_driver);
> -
> - failed1:
> + failed:
> unregister_chrdev_region(devt, HWICAP_DEVICES);
>
> return retval;
> @@ -884,8 +855,6 @@ static void __exit hwicap_module_cleanup(void)
>
> platform_driver_unregister(&hwicap_platform_driver);
>
> - hwicap_of_unregister();
> -
> unregister_chrdev_region(devt, HWICAP_DEVICES);
> }
>
>
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