From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753307Ab1BVU62 (ORCPT ); Tue, 22 Feb 2011 15:58:28 -0500 Received: from mail3.caviumnetworks.com ([12.108.191.235]:14014 "EHLO mail3.caviumnetworks.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753175Ab1BVU60 (ORCPT ); Tue, 22 Feb 2011 15:58:26 -0500 From: David Daney To: linux-mips@linux-mips.org, ralf@linux-mips.org, devicetree-discuss@lists.ozlabs.org, grant.likely@secretlab.ca, linux-kernel@vger.kernel.org Cc: David Daney , "Jean Delvare (PC drivers, core)" , "Ben Dooks (embedded platforms)" , linux-i2c@vger.kernel.org Subject: [RFC PATCH 07/10] i2c: Convert i2c-octeon.c to use device tree. Date: Tue, 22 Feb 2011 12:57:51 -0800 Message-Id: <1298408274-20856-8-git-send-email-ddaney@caviumnetworks.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1298408274-20856-1-git-send-email-ddaney@caviumnetworks.com> References: <1298408274-20856-1-git-send-email-ddaney@caviumnetworks.com> X-OriginalArrivalTime: 22 Feb 2011 20:58:25.0910 (UTC) FILETIME=[3FB74960:01CBD2D3] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Signed-off-by: David Daney Cc: "Jean Delvare (PC drivers, core)" Cc: "Ben Dooks (embedded platforms)" Cc: linux-i2c@vger.kernel.org --- arch/mips/cavium-octeon/octeon-platform.c | 84 --------------------------- arch/mips/include/asm/octeon/octeon.h | 5 -- drivers/i2c/busses/i2c-octeon.c | 88 +++++++++++++--------------- 3 files changed, 41 insertions(+), 136 deletions(-) diff --git a/arch/mips/cavium-octeon/octeon-platform.c b/arch/mips/cavium-octeon/octeon-platform.c index 428de0d..f148324 100644 --- a/arch/mips/cavium-octeon/octeon-platform.c +++ b/arch/mips/cavium-octeon/octeon-platform.c @@ -166,90 +166,6 @@ out: } device_initcall(octeon_rng_device_init); -static struct i2c_board_info __initdata octeon_i2c_devices[] = { - { - I2C_BOARD_INFO("ds1337", 0x68), - }, -}; - -static int __init octeon_i2c_devices_init(void) -{ - return i2c_register_board_info(0, octeon_i2c_devices, - ARRAY_SIZE(octeon_i2c_devices)); -} -arch_initcall(octeon_i2c_devices_init); - -#define OCTEON_I2C_IO_BASE 0x1180000001000ull -#define OCTEON_I2C_IO_UNIT_OFFSET 0x200 - -static struct octeon_i2c_data octeon_i2c_data[2]; - -static int __init octeon_i2c_device_init(void) -{ - struct platform_device *pd; - int ret = 0; - int port, num_ports; - - struct resource i2c_resources[] = { - { - .flags = IORESOURCE_MEM, - }, { - .flags = IORESOURCE_IRQ, - } - }; - - if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN52XX)) - num_ports = 2; - else - num_ports = 1; - - for (port = 0; port < num_ports; port++) { - octeon_i2c_data[port].sys_freq = octeon_get_io_clock_rate(); - /*FIXME: should be examined. At the moment is set for 100Khz */ - octeon_i2c_data[port].i2c_freq = 100000; - - pd = platform_device_alloc("i2c-octeon", port); - if (!pd) { - ret = -ENOMEM; - goto out; - } - - pd->dev.platform_data = octeon_i2c_data + port; - - i2c_resources[0].start = - OCTEON_I2C_IO_BASE + (port * OCTEON_I2C_IO_UNIT_OFFSET); - i2c_resources[0].end = i2c_resources[0].start + 0x1f; - switch (port) { - case 0: - i2c_resources[1].start = OCTEON_IRQ_TWSI; - i2c_resources[1].end = OCTEON_IRQ_TWSI; - break; - case 1: - i2c_resources[1].start = OCTEON_IRQ_TWSI2; - i2c_resources[1].end = OCTEON_IRQ_TWSI2; - break; - default: - BUG(); - } - - ret = platform_device_add_resources(pd, - i2c_resources, - ARRAY_SIZE(i2c_resources)); - if (ret) - goto fail; - - ret = platform_device_add(pd); - if (ret) - goto fail; - } - return ret; -fail: - platform_device_put(pd); -out: - return ret; -} -device_initcall(octeon_i2c_device_init); - /* Octeon SMI/MDIO interface. */ static int __init octeon_mdiobus_device_init(void) { diff --git a/arch/mips/include/asm/octeon/octeon.h b/arch/mips/include/asm/octeon/octeon.h index f72f768..1e2486e 100644 --- a/arch/mips/include/asm/octeon/octeon.h +++ b/arch/mips/include/asm/octeon/octeon.h @@ -215,11 +215,6 @@ struct octeon_cf_data { int dma_engine; /* -1 for no DMA */ }; -struct octeon_i2c_data { - unsigned int sys_freq; - unsigned int i2c_freq; -}; - extern void octeon_write_lcd(const char *s); extern void octeon_check_cpu_bist(void); extern int octeon_get_boot_debug_flag(void); diff --git a/drivers/i2c/busses/i2c-octeon.c b/drivers/i2c/busses/i2c-octeon.c index 56dbe54..99a20c6 100644 --- a/drivers/i2c/busses/i2c-octeon.c +++ b/drivers/i2c/busses/i2c-octeon.c @@ -11,17 +11,21 @@ * warranty of any kind, whether express or implied. */ +#include +#include +#include +#include #include #include +#include +#include +#include #include #include #include - -#include #include -#include -#include -#include +#include +#include #include @@ -67,9 +71,7 @@ struct octeon_i2c { int irq; int twsi_freq; int sys_freq; - resource_size_t twsi_phys; void __iomem *twsi_base; - resource_size_t regsize; struct device *dev; }; @@ -511,17 +513,18 @@ static int __devinit octeon_i2c_initlowlevel(struct octeon_i2c *i2c) return -EIO; } -static int __devinit octeon_i2c_probe(struct platform_device *pdev) +static int __devinit octeon_i2c_probe(struct platform_device *pdev, + const struct of_device_id *match) { int irq, result = 0; struct octeon_i2c *i2c; - struct octeon_i2c_data *i2c_data; - struct resource *res_mem; + const __be32 *data; + int len; /* All adaptors have an irq. */ - irq = platform_get_irq(pdev, 0); - if (irq < 0) - return irq; + irq = irq_of_parse_and_map(pdev->dev.of_node, 0); + if (!irq) + return -ENXIO; i2c = kzalloc(sizeof(*i2c), GFP_KERNEL); if (!i2c) { @@ -530,32 +533,16 @@ static int __devinit octeon_i2c_probe(struct platform_device *pdev) goto out; } i2c->dev = &pdev->dev; - i2c_data = pdev->dev.platform_data; - - res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); - - if (res_mem == NULL) { - dev_err(i2c->dev, "found no memory resource\n"); - result = -ENXIO; - goto fail_region; - } - if (i2c_data == NULL) { - dev_err(i2c->dev, "no I2C frequency data\n"); - result = -ENXIO; - goto fail_region; - } + data = of_get_property(pdev->dev.of_node, "clock-rate", &len); + if (data && len == sizeof(*data)) + i2c->twsi_freq = be32_to_cpup(data); + else + i2c->twsi_freq = 100000; - i2c->twsi_phys = res_mem->start; - i2c->regsize = resource_size(res_mem); - i2c->twsi_freq = i2c_data->i2c_freq; - i2c->sys_freq = i2c_data->sys_freq; + i2c->sys_freq = octeon_get_io_clock_rate(); - if (!request_mem_region(i2c->twsi_phys, i2c->regsize, res_mem->name)) { - dev_err(i2c->dev, "request_mem_region failed\n"); - goto fail_region; - } - i2c->twsi_base = ioremap(i2c->twsi_phys, i2c->regsize); + i2c->twsi_base = of_iomap(pdev->dev.of_node, 0); init_waitqueue_head(&i2c->queue); @@ -581,27 +568,27 @@ static int __devinit octeon_i2c_probe(struct platform_device *pdev) i2c->adap = octeon_i2c_ops; i2c->adap.dev.parent = &pdev->dev; - i2c->adap.nr = pdev->id >= 0 ? pdev->id : 0; + i2c->adap.dev.of_node = pdev->dev.of_node; i2c_set_adapdata(&i2c->adap, i2c); platform_set_drvdata(pdev, i2c); - result = i2c_add_numbered_adapter(&i2c->adap); + result = i2c_add_adapter(&i2c->adap); if (result < 0) { dev_err(i2c->dev, "failed to add adapter\n"); goto fail_add; } - dev_info(i2c->dev, "version %s\n", DRV_VERSION); - return result; + of_i2c_register_devices(&i2c->adap); + + return 0; fail_add: platform_set_drvdata(pdev, NULL); free_irq(i2c->irq, i2c); fail_irq: iounmap(i2c->twsi_base); - release_mem_region(i2c->twsi_phys, i2c->regsize); -fail_region: + kfree(i2c); out: return result; @@ -615,17 +602,25 @@ static int __devexit octeon_i2c_remove(struct platform_device *pdev) platform_set_drvdata(pdev, NULL); free_irq(i2c->irq, i2c); iounmap(i2c->twsi_base); - release_mem_region(i2c->twsi_phys, i2c->regsize); kfree(i2c); return 0; }; -static struct platform_driver octeon_i2c_driver = { +static struct of_device_id octeon_i2c_match[] = { + { + .compatible = "octeon,twsi", + }, + {}, +}; +MODULE_DEVICE_TABLE(of, octeon_i2c_match); + +static struct of_platform_driver octeon_i2c_driver = { .probe = octeon_i2c_probe, .remove = __devexit_p(octeon_i2c_remove), .driver = { .owner = THIS_MODULE, .name = DRV_NAME, + .of_match_table = octeon_i2c_match, }, }; @@ -633,20 +628,19 @@ static int __init octeon_i2c_init(void) { int rv; - rv = platform_driver_register(&octeon_i2c_driver); + rv = of_register_platform_driver(&octeon_i2c_driver); return rv; } static void __exit octeon_i2c_exit(void) { - platform_driver_unregister(&octeon_i2c_driver); + of_unregister_platform_driver(&octeon_i2c_driver); } MODULE_AUTHOR("Michael Lawnick "); MODULE_DESCRIPTION("I2C-Bus adapter for Cavium OCTEON processors"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); -MODULE_ALIAS("platform:" DRV_NAME); module_init(octeon_i2c_init); module_exit(octeon_i2c_exit); -- 1.7.2.3