mtd: lpc32xx_mlc: Cleanup after DT-only conversion

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Gitweb:     http://git.infradead.org/?p=mtd-2.6.git;a=commit;h=62beee20b1a53ba633badc4b57c68d815c9f3e66
Commit:     62beee20b1a53ba633badc4b57c68d815c9f3e66
Parent:     10594f67870e86aac361d75ee1e84535a33e1214
Author:     Roland Stigge <stigge at antcom.de>
AuthorDate: Fri Aug 24 15:06:52 2012 +0200
Committer:  David Woodhouse <David.Woodhouse at intel.com>
CommitDate: Sat Sep 29 15:12:49 2012 +0100

    mtd: lpc32xx_mlc: Cleanup after DT-only conversion
    
    The LPC32xx's DT-only conversion of the MLC NAND driver makes NAND config via
    platform_data obsolete. Dropped by this patch.
    
    Further, the driver really needs CONFIG_OF, which is already reflected by the
    dependency on ARCH_LPC32XX which depends on CONFIG_OF. So also dropping
    CONFIG_OF ifdefs.
    
    There is still platform_data necessary to supply the dma_filter callback for
    the dma engine. This is a completely different data structure than the old
    platform_data for NAND config, so renaming some old "pdata" variable to "ncfg"
    to prevent confusion with the new platform data.
    
    Signed-off-by: Roland Stigge <stigge at antcom.de>
    Signed-off-by: Artem Bityutskiy <artem.bityutskiy at linux.intel.com>
    Signed-off-by: David Woodhouse <David.Woodhouse at intel.com>
---
 drivers/mtd/nand/lpc32xx_mlc.c |   46 +++++++++++++++------------------------
 1 files changed, 18 insertions(+), 28 deletions(-)

diff --git a/drivers/mtd/nand/lpc32xx_mlc.c b/drivers/mtd/nand/lpc32xx_mlc.c
index 5da3179..c29b7ac 100644
--- a/drivers/mtd/nand/lpc32xx_mlc.c
+++ b/drivers/mtd/nand/lpc32xx_mlc.c
@@ -621,43 +621,36 @@ out1:
 	return -ENXIO;
 }
 
-#ifdef CONFIG_OF
 static struct lpc32xx_nand_cfg_mlc *lpc32xx_parse_dt(struct device *dev)
 {
-	struct lpc32xx_nand_cfg_mlc *pdata;
+	struct lpc32xx_nand_cfg_mlc *ncfg;
 	struct device_node *np = dev->of_node;
 
-	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
-	if (!pdata) {
+	ncfg = devm_kzalloc(dev, sizeof(*ncfg), GFP_KERNEL);
+	if (!ncfg) {
 		dev_err(dev, "could not allocate memory for platform data\n");
 		return NULL;
 	}
 
-	of_property_read_u32(np, "nxp,tcea-delay", &pdata->tcea_delay);
-	of_property_read_u32(np, "nxp,busy-delay", &pdata->busy_delay);
-	of_property_read_u32(np, "nxp,nand-ta", &pdata->nand_ta);
-	of_property_read_u32(np, "nxp,rd-high", &pdata->rd_high);
-	of_property_read_u32(np, "nxp,rd-low", &pdata->rd_low);
-	of_property_read_u32(np, "nxp,wr-high", &pdata->wr_high);
-	of_property_read_u32(np, "nxp,wr-low", &pdata->wr_low);
-
-	if (!pdata->tcea_delay || !pdata->busy_delay || !pdata->nand_ta ||
-	    !pdata->rd_high || !pdata->rd_low || !pdata->wr_high ||
-	    !pdata->wr_low) {
+	of_property_read_u32(np, "nxp,tcea-delay", &ncfg->tcea_delay);
+	of_property_read_u32(np, "nxp,busy-delay", &ncfg->busy_delay);
+	of_property_read_u32(np, "nxp,nand-ta", &ncfg->nand_ta);
+	of_property_read_u32(np, "nxp,rd-high", &ncfg->rd_high);
+	of_property_read_u32(np, "nxp,rd-low", &ncfg->rd_low);
+	of_property_read_u32(np, "nxp,wr-high", &ncfg->wr_high);
+	of_property_read_u32(np, "nxp,wr-low", &ncfg->wr_low);
+
+	if (!ncfg->tcea_delay || !ncfg->busy_delay || !ncfg->nand_ta ||
+	    !ncfg->rd_high || !ncfg->rd_low || !ncfg->wr_high ||
+	    !ncfg->wr_low) {
 		dev_err(dev, "chip parameters not specified correctly\n");
 		return NULL;
 	}
 
-	pdata->wp_gpio = of_get_named_gpio(np, "gpios", 0);
+	ncfg->wp_gpio = of_get_named_gpio(np, "gpios", 0);
 
-	return pdata;
+	return ncfg;
 }
-#else
-static struct lpc32xx_nand_cfg_mlc *lpc32xx_parse_dt(struct device *dev)
-{
-	return NULL;
-}
-#endif
 
 /*
  * Probe for NAND controller
@@ -695,10 +688,9 @@ static int __devinit lpc32xx_nand_probe(struct platform_device *pdev)
 	nand_chip = &host->nand_chip;
 	if (pdev->dev.of_node)
 		host->ncfg = lpc32xx_parse_dt(&pdev->dev);
-	else
-		host->ncfg = pdev->dev.platform_data;
 	if (!host->ncfg) {
-		dev_err(&pdev->dev, "Missing platform data\n");
+		dev_err(&pdev->dev,
+			"Missing or bad NAND config from device tree\n");
 		return -ENOENT;
 	}
 	if (host->ncfg->wp_gpio == -EPROBE_DEFER)
@@ -907,13 +899,11 @@ static int lpc32xx_nand_suspend(struct platform_device *pdev, pm_message_t pm)
 #define lpc32xx_nand_suspend NULL
 #endif
 
-#if defined(CONFIG_OF)
 static const struct of_device_id lpc32xx_nand_match[] = {
 	{ .compatible = "nxp,lpc3220-mlc" },
 	{ /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, lpc32xx_nand_match);
-#endif
 
 static struct platform_driver lpc32xx_nand_driver = {
 	.probe		= lpc32xx_nand_probe,