From: Adrian Hunter <adrian.hunter@nokia.com>
Date: Mon, 7 Feb 2011 08:46:59 +0000 (+0200)
Subject: OMAP: OneNAND: determine frequency in one place
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=3ad2d861362031dac8b2bba78a8f4c575300948f;p=linux-beck.git

OMAP: OneNAND: determine frequency in one place

OneNAND frequency is determined when calculating
GPMC timings.  Return that value instead of determining it
again in the OMAP OneNAND driver.

Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---

diff --git a/arch/arm/mach-omap2/gpmc-onenand.c b/arch/arm/mach-omap2/gpmc-onenand.c
index 3a4307b8f7cf..46786a606e90 100644
--- a/arch/arm/mach-omap2/gpmc-onenand.c
+++ b/arch/arm/mach-omap2/gpmc-onenand.c
@@ -123,7 +123,7 @@ static void set_onenand_cfg(void __iomem *onenand_base, int latency,
 
 static int omap2_onenand_set_sync_mode(struct omap_onenand_platform_data *cfg,
 					void __iomem *onenand_base,
-					int freq)
+					int *freq_ptr)
 {
 	struct gpmc_timings t;
 	const int t_cer  = 15;
@@ -136,7 +136,7 @@ static int omap2_onenand_set_sync_mode(struct omap_onenand_platform_data *cfg,
 	int tick_ns, div, fclk_offset_ns, fclk_offset, gpmc_clk_ns, latency;
 	int first_time = 0, hf = 0, vhf = 0, sync_read = 0, sync_write = 0;
 	int err, ticks_cez;
-	int cs = cfg->cs;
+	int cs = cfg->cs, freq = *freq_ptr;
 	u32 reg;
 
 	if (cfg->flags & ONENAND_SYNC_READ) {
@@ -330,16 +330,18 @@ static int omap2_onenand_set_sync_mode(struct omap_onenand_platform_data *cfg,
 
 	set_onenand_cfg(onenand_base, latency, sync_read, sync_write, hf, vhf);
 
+	*freq_ptr = freq;
+
 	return 0;
 }
 
-static int gpmc_onenand_setup(void __iomem *onenand_base, int freq)
+static int gpmc_onenand_setup(void __iomem *onenand_base, int *freq_ptr)
 {
 	struct device *dev = &gpmc_onenand_device.dev;
 
 	/* Set sync timings in GPMC */
 	if (omap2_onenand_set_sync_mode(gpmc_onenand_data, onenand_base,
-			freq) < 0) {
+			freq_ptr) < 0) {
 		dev_err(dev, "Unable to set synchronous mode\n");
 		return -EINVAL;
 	}
diff --git a/arch/arm/plat-omap/include/plat/onenand.h b/arch/arm/plat-omap/include/plat/onenand.h
index affe87e9ece7..86118dc3f19a 100644
--- a/arch/arm/plat-omap/include/plat/onenand.h
+++ b/arch/arm/plat-omap/include/plat/onenand.h
@@ -20,7 +20,7 @@ struct omap_onenand_platform_data {
 	int			gpio_irq;
 	struct mtd_partition	*parts;
 	int			nr_parts;
-	int                     (*onenand_setup)(void __iomem *, int freq);
+	int			(*onenand_setup)(void __iomem *, int *freq_ptr);
 	int			dma_channel;
 	u8			flags;
 	u8			regulator_can_sleep;
diff --git a/drivers/mtd/onenand/omap2.c b/drivers/mtd/onenand/omap2.c
index ac31f461cc1c..3e1bb9568823 100644
--- a/drivers/mtd/onenand/omap2.c
+++ b/drivers/mtd/onenand/omap2.c
@@ -63,7 +63,7 @@ struct omap2_onenand {
 	struct completion dma_done;
 	int dma_channel;
 	int freq;
-	int (*setup)(void __iomem *base, int freq);
+	int (*setup)(void __iomem *base, int *freq_ptr);
 	struct regulator *regulator;
 };
 
@@ -581,7 +581,7 @@ static int __adjust_timing(struct device *dev, void *data)
 
 	/* DMA is not in use so this is all that is needed */
 	/* Revisit for OMAP3! */
-	ret = c->setup(c->onenand.base, c->freq);
+	ret = c->setup(c->onenand.base, &c->freq);
 
 	return ret;
 }
@@ -673,7 +673,7 @@ static int __devinit omap2_onenand_probe(struct platform_device *pdev)
 	}
 
 	if (pdata->onenand_setup != NULL) {
-		r = pdata->onenand_setup(c->onenand.base, c->freq);
+		r = pdata->onenand_setup(c->onenand.base, &c->freq);
 		if (r < 0) {
 			dev_err(&pdev->dev, "Onenand platform setup failed: "
 				"%d\n", r);
@@ -718,8 +718,8 @@ static int __devinit omap2_onenand_probe(struct platform_device *pdev)
 	}
 
 	dev_info(&pdev->dev, "initializing on CS%d, phys base 0x%08lx, virtual "
-		 "base %p\n", c->gpmc_cs, c->phys_base,
-		 c->onenand.base);
+		 "base %p, freq %d MHz\n", c->gpmc_cs, c->phys_base,
+		 c->onenand.base, c->freq);
 
 	c->pdev = pdev;
 	c->mtd.name = dev_name(&pdev->dev);
@@ -754,24 +754,6 @@ static int __devinit omap2_onenand_probe(struct platform_device *pdev)
 	if ((r = onenand_scan(&c->mtd, 1)) < 0)
 		goto err_release_regulator;
 
-	switch ((c->onenand.version_id >> 4) & 0xf) {
-	case 0:
-		c->freq = 40;
-		break;
-	case 1:
-		c->freq = 54;
-		break;
-	case 2:
-		c->freq = 66;
-		break;
-	case 3:
-		c->freq = 83;
-		break;
-	case 4:
-		c->freq = 104;
-		break;
-	}
-
 #ifdef CONFIG_MTD_PARTITIONS
 	r = parse_mtd_partitions(&c->mtd, part_probes, &c->parts, 0);
 	if (r > 0)