[PATCH v4 01/14] mtd: nand: pxa3xx: Remove unneeded ifdef CONFIG_OF

[PATCH v4 01/14] mtd: nand: pxa3xx: Remove unneeded ifdef CONFIG_OF

[Ezequiel Garcia]

There's no need to enclose this code within idef CONFIG_OF,
because the OF framework provides no-op stubs if CONFIG_OF=n.

Cc: devicetree@vger.kernel.org
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
---
 drivers/mtd/nand/pxa3xx_nand.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index 501e380..02f214d 100644
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -1190,7 +1190,6 @@ static int pxa3xx_nand_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_OF
 static struct of_device_id pxa3xx_nand_dt_ids[] = {
 	{ .compatible = "marvell,pxa3xx-nand" },
 	{}
@@ -1221,12 +1220,6 @@ static int pxa3xx_nand_probe_dt(struct platform_device *pdev)
 
 	return 0;
 }
-#else
-static inline int pxa3xx_nand_probe_dt(struct platform_device *pdev)
-{
-	return 0;
-}
-#endif
 
 static int pxa3xx_nand_probe(struct platform_device *pdev)
 {
-- 
1.8.1.5

Re: [PATCH v4 01/14] mtd: nand: pxa3xx: Remove unneeded ifdef CONFIG_OF

[David Woodhouse]

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On Mon, 2013-08-12 at 14:14 -0300, Ezequiel Garcia wrote:
> There's no need to enclose this code within idef CONFIG_OF,
> because the OF framework provides no-op stubs if CONFIG_OF=n.

Hm, won't this end up with the same 'pxa3xx_nand_dt_ids is defined but
not used' warning that just caused us to *add* an #ifdef CONFIG_OF to
atmel_nand? 

-- 
dwmw2


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Re: [PATCH v4 01/14] mtd: nand: pxa3xx: Remove unneeded ifdef CONFIG_OF

[Ezequiel Garcia]

On Fri, Aug 30, 2013 at 09:06:22PM +0100, David Woodhouse wrote:
> On Mon, 2013-08-12 at 14:14 -0300, Ezequiel Garcia wrote:
> > There's no need to enclose this code within idef CONFIG_OF,
> > because the OF framework provides no-op stubs if CONFIG_OF=n.
> 
> Hm, won't this end up with the same 'pxa3xx_nand_dt_ids is defined but
> not used' warning that just caused us to *add* an #ifdef CONFIG_OF to
> atmel_nand? 
> 

No, it won't.

Currently atmel_nand uses its of_device_id for just the of_match_table,
while pxa3xx-nand uses the pxa3xx_nand_dt_ids for more than just that,
as a paramater for of_match_device().

The latter prevents the warning by having an actual dummy-inlined
implementation for the !OF case.

I'll answer about the atmel_nand in the respective patch.
-- 
Ezequiel García, Free Electrons
Embedded Linux, Kernel and Android Engineering
http://free-electrons.com

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Re: [PATCH v4 01/14] mtd: nand: pxa3xx: Remove unneeded ifdef CONFIG_OF

[Olof Johansson]

On Mon, Aug 12, 2013 at 10:14 AM, Ezequiel Garcia
<ezequiel.garcia-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> There's no need to enclose this code within idef CONFIG_OF,
> because the OF framework provides no-op stubs if CONFIG_OF=n.
>
> Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> Signed-off-by: Ezequiel Garcia <ezequiel.garcia-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>

I've applied this to arm-soc fixes (with Brian's signed-off inbetween,
since I picked it up from linux-next by cherry-pick). Based on other
discussions, David is MIA and this patch is needed to fix pxa3xx
builds.


-Olof
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[PATCH v4 02/14] mtd: nand: pxa3xx: Introduce 'marvell,armada370-nand' compatible string

[Ezequiel Garcia]

This driver supports NFCv1 (as found in PXA SoC) and NFCv2 (as found in
Armada 370/XP SoC). As both controller has a few differences, a way of
distinguishing between the two is needed.

This commit introduces a new compatible string 'marvell,armada370-nand'
and assigns a compatible data of type enum pxa3xx_nand_variant to allow
such distinction.

Cc: devicetree@vger.kernel.org
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
---
 drivers/mtd/nand/pxa3xx_nand.c | 31 ++++++++++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index 02f214d..55eb153 100644
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -123,6 +123,11 @@ enum {
 	STATE_READY,
 };
 
+enum pxa3xx_nand_variant {
+	PXA3XX_NAND_VARIANT_PXA,
+	PXA3XX_NAND_VARIANT_ARMADA370,
+};
+
 struct pxa3xx_nand_host {
 	struct nand_chip	chip;
 	struct pxa3xx_nand_cmdset *cmdset;
@@ -171,6 +176,12 @@ struct pxa3xx_nand_info {
 	struct pxa3xx_nand_host *host[NUM_CHIP_SELECT];
 	unsigned int		state;
 
+	/*
+	 * This driver supports NFCv1 (as found in PXA SoC)
+	 * and NFCv2 (as found in Armada 370/XP SoC).
+	 */
+	enum pxa3xx_nand_variant variant;
+
 	int			cs;
 	int			use_ecc;	/* use HW ECC ? */
 	int			use_dma;	/* use DMA ? */
@@ -1191,11 +1202,28 @@ static int pxa3xx_nand_remove(struct platform_device *pdev)
 }
 
 static struct of_device_id pxa3xx_nand_dt_ids[] = {
-	{ .compatible = "marvell,pxa3xx-nand" },
+	{
+		.compatible = "marvell,pxa3xx-nand",
+		.data       = (void *) PXA3XX_NAND_VARIANT_PXA,
+	},
+	{
+		.compatible = "marvell,armada370-nand",
+		.data       = (void *) PXA3XX_NAND_VARIANT_ARMADA370,
+	},
 	{}
 };
 MODULE_DEVICE_TABLE(of, pxa3xx_nand_dt_ids);
 
+static enum pxa3xx_nand_variant
+pxa3xx_nand_get_variant(struct platform_device *pdev)
+{
+	const struct of_device_id *of_id =
+			of_match_device(pxa3xx_nand_dt_ids, &pdev->dev);
+	if (!of_id)
+		return PXA3XX_NAND_VARIANT_PXA;
+	return (enum pxa3xx_nand_variant) of_id->data;
+}
+
 static int pxa3xx_nand_probe_dt(struct platform_device *pdev)
 {
 	struct pxa3xx_nand_platform_data *pdata;
@@ -1245,6 +1273,7 @@ static int pxa3xx_nand_probe(struct platform_device *pdev)
 	}
 
 	info = platform_get_drvdata(pdev);
+	info->variant = pxa3xx_nand_get_variant(pdev);
 	probe_success = 0;
 	for (cs = 0; cs < pdata->num_cs; cs++) {
 		info->cs = cs;
-- 
1.8.1.5