From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Vjs2v-0008Fv-51 for barebox@lists.infradead.org; Fri, 22 Nov 2013 14:49:43 +0000 From: Sascha Hauer Date: Fri, 22 Nov 2013 15:48:47 +0100 Message-Id: <1385131741-28280-4-git-send-email-s.hauer@pengutronix.de> In-Reply-To: <1385131741-28280-1-git-send-email-s.hauer@pengutronix.de> References: <1385131741-28280-1-git-send-email-s.hauer@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 03/17] spi: omap: encode register offset into device_id To: barebox@lists.infradead.org The omap3 and omap4/am33xx spi cores differ in the offset of the registers in the address space. Instead of encoding this into the resources use the platform_device_id mechanism. This is done in preparation for devicetree probe support where the address space is in the devicetree and can't be adjusted. Signed-off-by: Sascha Hauer --- arch/arm/mach-omap/include/mach/am33xx-devices.h | 2 +- drivers/spi/omap3_spi.c | 38 ++++++++++++++++++++++-- drivers/spi/omap3_spi.h | 6 +++- 3 files changed, 42 insertions(+), 4 deletions(-) diff --git a/arch/arm/mach-omap/include/mach/am33xx-devices.h b/arch/arm/mach-omap/include/mach/am33xx-devices.h index 6691980..d2411a4 100644 --- a/arch/arm/mach-omap/include/mach/am33xx-devices.h +++ b/arch/arm/mach-omap/include/mach/am33xx-devices.h @@ -45,7 +45,7 @@ static inline struct device_d *am33xx_add_cpsw(struct cpsw_platform_data *cpsw_d static inline struct device_d *am33xx_add_spi(int id, resource_size_t start) { - return add_generic_device("omap3_spi", id, NULL, start + 0x100, SZ_4K - 0x100, + return add_generic_device("omap4-spi", id, NULL, start, SZ_4K, IORESOURCE_MEM, NULL); } diff --git a/drivers/spi/omap3_spi.c b/drivers/spi/omap3_spi.c index 5c8cc88..136fc18 100644 --- a/drivers/spi/omap3_spi.c +++ b/drivers/spi/omap3_spi.c @@ -49,6 +49,10 @@ #define SPI_XFER_BEGIN 0x01 /* Assert CS before transfer */ #define SPI_XFER_END 0x02 /* Deassert CS after transfer */ +struct omap_spi_drvdata { + unsigned register_offset; +}; + static void spi_reset(struct spi_master *master) { struct omap3_spi_master *omap3_master = container_of(master, struct omap3_spi_master, master); @@ -343,6 +347,12 @@ static int omap3_spi_probe(struct device_d *dev) { struct spi_master *master; struct omap3_spi_master *omap3_master; + struct omap_spi_drvdata *devtype; + int ret; + + ret = dev_get_drvdata(dev, (unsigned long *)&devtype); + if (ret) + return ret; omap3_master = xzalloc(sizeof(*omap3_master)); @@ -374,7 +384,10 @@ static int omap3_spi_probe(struct device_d *dev) master->setup = omap3_spi_setup; master->transfer = omap3_spi_transfer; - omap3_master->regs = dev_request_mem_region(dev, 0); + omap3_master->base = dev_request_mem_region(dev, 0); + omap3_master->regs = omap3_master->base; + + omap3_master->regs += devtype->register_offset; spi_reset(master); @@ -383,8 +396,29 @@ static int omap3_spi_probe(struct device_d *dev) return 0; } +static struct omap_spi_drvdata omap3_data = { + .register_offset = 0x0, +}; + +static struct omap_spi_drvdata omap4_data = { + .register_offset = 0x100, +}; + +static struct platform_device_id omap_spi_ids[] = { + { + .name = "omap3-spi", + .driver_data = (unsigned long)&omap3_data, + }, { + .name = "omap4-spi", + .driver_data = (unsigned long)&omap4_data, + }, { + /* sentinel */ + }, +}; + static struct driver_d omap3_spi_driver = { - .name = "omap3_spi", + .name = "omap-spi", .probe = omap3_spi_probe, + .id_table = omap_spi_ids, }; device_platform_driver(omap3_spi_driver); diff --git a/drivers/spi/omap3_spi.h b/drivers/spi/omap3_spi.h index 55fd2fc..ce4a29b 100644 --- a/drivers/spi/omap3_spi.h +++ b/drivers/spi/omap3_spi.h @@ -88,7 +88,11 @@ struct omap3_spi_master { struct spi_master master; - void __iomem *regs; + void __iomem *base; /* base of address space */ + void __iomem *regs; /* actual start of registers, omap4/am33xx have an + * offset of 0x100 between start of register space + * and registers + */ }; #endif /* _OMAP3_SPI_H_ */ -- 1.8.4.2 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox