Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753164AbbKQETX (ORCPT ); Mon, 16 Nov 2015 23:19:23 -0500 Received: from mail-qk0-f176.google.com ([209.85.220.176]:35164 "EHLO mail-qk0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752295AbbKQERl (ORCPT ); Mon, 16 Nov 2015 23:17:41 -0500 From: Cory Tusar To: robh+dt@kernel.org, pawel.moll@arm.com, mark.rutland@arm.com, ijc+devicetree@hellion.org.uk, galak@codeaurora.org, agust@denx.de, gregkh@linuxfoundation.org Cc: jic23@kernel.org, vz@mleia.com, broonie@kernel.org, afd@ti.com, andrew@lunn.ch, Chris.Healy@zii.aero, Keith.Vennel@zii.aero, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Cory Tusar Subject: [PATCH 3/7] misc: eeprom: 93xx46: Implement eeprom_93xx46 DT bindings. Date: Mon, 16 Nov 2015 23:16:32 -0500 Message-Id: <1447733796-15546-4-git-send-email-cory.tusar@pid1solutions.com> X-Mailer: git-send-email 2.4.10 In-Reply-To: <1447733796-15546-1-git-send-email-cory.tusar@pid1solutions.com> References: <1447733796-15546-1-git-send-email-cory.tusar@pid1solutions.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2902 Lines: 110 This commit implements bindings in the eeprom_93xx46 driver allowing device word size and read-only attributes to be specified via devicetree. Signed-off-by: Cory Tusar --- drivers/misc/eeprom/eeprom_93xx46.c | 62 +++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) diff --git a/drivers/misc/eeprom/eeprom_93xx46.c b/drivers/misc/eeprom/eeprom_93xx46.c index e1bf0a5..1f29d9a 100644 --- a/drivers/misc/eeprom/eeprom_93xx46.c +++ b/drivers/misc/eeprom/eeprom_93xx46.c @@ -13,6 +13,8 @@ #include #include #include +#include +#include #include #include #include @@ -294,12 +296,71 @@ static ssize_t eeprom_93xx46_store_erase(struct device *dev, } static DEVICE_ATTR(erase, S_IWUSR, NULL, eeprom_93xx46_store_erase); +#ifdef CONFIG_OF +static const struct of_device_id eeprom_93xx46_of_table[] = { + { .compatible = "eeprom-93xx46", }, + {} +}; +MODULE_DEVICE_TABLE(of, eeprom_93xx46_of_table); + +static int eeprom_93xx46_probe_dt(struct spi_device *spi) +{ + struct device_node *np = spi->dev.of_node; + struct eeprom_93xx46_platform_data *pd; + u32 tmp; + int ret; + + if (!of_match_device(eeprom_93xx46_of_table, &spi->dev)) + return 0; + + pd = devm_kzalloc(&spi->dev, sizeof(*pd), GFP_KERNEL); + if (!pd) + return -ENOMEM; + + ret = of_property_read_u32(np, "data-size", &tmp); + if (ret < 0) { + dev_err(&spi->dev, "data-size property not found\n"); + goto error_free; + } + + if (tmp == 8) { + pd->flags |= EE_ADDR8; + } else if (tmp == 16) { + pd->flags |= EE_ADDR16; + } else { + dev_err(&spi->dev, "invalid data-size (%d)\n", tmp); + goto error_free; + } + + if (of_property_read_bool(np, "read-only")) + pd->flags |= EE_READONLY; + + spi->dev.platform_data = pd; + + return 1; + +error_free: + devm_kfree(&spi->dev, pd); + return ret; +} + +#else +static inline int eeprom_93xx46_probe_dt(struct spi_device *spi) +{ + return 0; +} +#endif + static int eeprom_93xx46_probe(struct spi_device *spi) { struct eeprom_93xx46_platform_data *pd; struct eeprom_93xx46_dev *edev; int err; + err = eeprom_93xx46_probe_dt(spi); + if (err < 0) + return err; + pd = spi->dev.platform_data; if (!pd) { dev_err(&spi->dev, "missing platform data\n"); @@ -370,6 +431,7 @@ static int eeprom_93xx46_remove(struct spi_device *spi) static struct spi_driver eeprom_93xx46_driver = { .driver = { .name = "93xx46", + .of_match_table = eeprom_93xx46_of_table, }, .probe = eeprom_93xx46_probe, .remove = eeprom_93xx46_remove, -- 2.4.10 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/