[PATCH V2 2/3] ARM: kirkwood: Convert orion-nand to fdt
Jamie Lentin
jm at lentin.co.uk
Sun Mar 25 00:14:35 EST 2012
Convert orion-nand to use fdt and add common setup to kirkwood.dtsi, including
a default value for chip-delay (all current boards seem to use 25 anyway).
Add placeholder documentation for the bindings, for someone more knowledgable
than me to fill in the details of the properties.
Signed-off-by: Jamie Lentin <jm at lentin.co.uk>
---
.../devicetree/bindings/mtd/orion-nand.txt | 46 ++++++++++++++++++++
arch/arm/boot/dts/kirkwood.dtsi | 15 ++++++-
arch/arm/mach-kirkwood/common.c | 12 +++++
drivers/mtd/nand/orion_nand.c | 34 ++++++++++++++-
4 files changed, 104 insertions(+), 3 deletions(-)
create mode 100644 Documentation/devicetree/bindings/mtd/orion-nand.txt
diff --git a/Documentation/devicetree/bindings/mtd/orion-nand.txt b/Documentation/devicetree/bindings/mtd/orion-nand.txt
new file mode 100644
index 0000000..d347999
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/orion-nand.txt
@@ -0,0 +1,46 @@
+NAND support for Marvell Orion SoC platforms
+
+Required properties:
+- compatible : "mrvl,orion-nand".
+- reg : Base physical address of the NAND and length of memory mapped
+ region
+
+Optional properties:
+- cle :
+- ale :
+- width :
+- chip-delay :
+
+Examples:
+
+nand at f4000000 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ cle = <0>;
+ ale = <1>;
+ width = <8>;
+ chip-delay = <25>;
+ compatible = "mrvl,orion-nand";
+ reg = <0xf4000000 0x400>;
+
+ partition at 0 {
+ label = "u-boot";
+ reg = <0x0000000 0x100000>;
+ read-only;
+ };
+
+ partition at 100000 {
+ label = "uImage";
+ reg = <0x0100000 0x200000>;
+ };
+
+ partition at 300000 {
+ label = "dtb";
+ reg = <0x0300000 0x100000>;
+ };
+
+ partition at 400000 {
+ label = "root";
+ reg = <0x0400000 0x7d00000>;
+ };
+};
diff --git a/arch/arm/boot/dts/kirkwood.dtsi b/arch/arm/boot/dts/kirkwood.dtsi
index 3474ef8..82ffc3e 100644
--- a/arch/arm/boot/dts/kirkwood.dtsi
+++ b/arch/arm/boot/dts/kirkwood.dtsi
@@ -5,7 +5,7 @@
ocp at f1000000 {
compatible = "simple-bus";
- ranges = <0 0xf1000000 0x1000000>;
+ ranges = <0 0xf1000000 0x4000000>;
#address-cells = <1>;
#size-cells = <1>;
@@ -32,5 +32,18 @@
reg = <0x10300 0x20>;
interrupts = <53>;
};
+
+ nand at 3000000 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ cle = <0>;
+ ale = <1>;
+ width = <8>;
+ compatible = "mrvl,orion-nand";
+ reg = <0x3000000 0x400>;
+ chip-delay = <25>;
+ /* set partition map and/or chip-delay in board dts */
+ status = "disabled";
+ };
};
};
diff --git a/arch/arm/mach-kirkwood/common.c b/arch/arm/mach-kirkwood/common.c
index a02cae8..3ad0373 100644
--- a/arch/arm/mach-kirkwood/common.c
+++ b/arch/arm/mach-kirkwood/common.c
@@ -15,6 +15,7 @@
#include <linux/ata_platform.h>
#include <linux/mtd/nand.h>
#include <linux/dma-mapping.h>
+#include <linux/of.h>
#include <net/dsa.h>
#include <asm/page.h>
#include <asm/timex.h>
@@ -482,6 +483,9 @@ static int __init kirkwood_clock_gate(void)
unsigned int curr = readl(CLOCK_GATING_CTRL);
u32 dev, rev;
+#ifdef CONFIG_OF
+ struct device_node *np;
+#endif
kirkwood_pcie_id(&dev, &rev);
printk(KERN_DEBUG "Gating clock of unused units\n");
printk(KERN_DEBUG "before: 0x%08x\n", curr);
@@ -489,6 +493,14 @@ static int __init kirkwood_clock_gate(void)
/* Make sure those units are accessible */
writel(curr | CGC_SATA0 | CGC_SATA1 | CGC_PEX0 | CGC_PEX1, CLOCK_GATING_CTRL);
+#ifdef CONFIG_OF
+ np = of_find_compatible_node(NULL, NULL, "mrvl,orion-nand");
+ if (np && of_device_is_available(np)) {
+ kirkwood_clk_ctrl |= CGC_RUNIT;
+ of_node_put(np);
+ }
+#endif
+
/* For SATA: first shutdown the phy */
if (!(kirkwood_clk_ctrl & CGC_SATA0)) {
/* Disable PLL and IVREF */
diff --git a/drivers/mtd/nand/orion_nand.c b/drivers/mtd/nand/orion_nand.c
index 29f505a..4cb0244 100644
--- a/drivers/mtd/nand/orion_nand.c
+++ b/drivers/mtd/nand/orion_nand.c
@@ -13,6 +13,7 @@
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/platform_device.h>
+#include <linux/of.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>
@@ -74,11 +75,13 @@ static void orion_nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
static int __init orion_nand_probe(struct platform_device *pdev)
{
struct mtd_info *mtd;
+ struct mtd_part_parser_data ppdata = {};
struct nand_chip *nc;
struct orion_nand_data *board;
struct resource *res;
void __iomem *io_base;
int ret = 0;
+ u32 val = 0;
nc = kzalloc(sizeof(struct nand_chip) + sizeof(struct mtd_info), GFP_KERNEL);
if (!nc) {
@@ -101,7 +104,25 @@ static int __init orion_nand_probe(struct platform_device *pdev)
goto no_res;
}
- board = pdev->dev.platform_data;
+ if (pdev->dev.of_node) {
+ board = devm_kzalloc(&pdev->dev, sizeof(struct orion_nand_data),
+ GFP_KERNEL);
+ if (!board) {
+ printk(KERN_ERR "orion_nand: failed to allocate board structure.\n");
+ ret = -ENOMEM;
+ goto no_res;
+ }
+ if (!of_property_read_u32(pdev->dev.of_node, "cle", &val))
+ board->cle = (u8)val;
+ if (!of_property_read_u32(pdev->dev.of_node, "ale", &val))
+ board->ale = (u8)val;
+ if (!of_property_read_u32(pdev->dev.of_node, "width", &val))
+ board->width = (u8)val;
+ if (!of_property_read_u32(pdev->dev.of_node,
+ "chip-delay", &val))
+ board->chip_delay = (u8)val;
+ } else
+ board = pdev->dev.platform_data;
mtd->priv = nc;
mtd->owner = THIS_MODULE;
@@ -129,7 +150,8 @@ static int __init orion_nand_probe(struct platform_device *pdev)
}
mtd->name = "orion_nand";
- ret = mtd_device_parse_register(mtd, NULL, 0,
+ ppdata.of_node = pdev->dev.of_node;
+ ret = mtd_device_parse_register(mtd, NULL, &ppdata,
board->parts, board->nr_parts);
if (ret) {
nand_release(mtd);
@@ -161,11 +183,19 @@ static int __devexit orion_nand_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_OF
+static struct of_device_id orion_nand_of_match_table[] = {
+ { .compatible = "mrvl,orion-nand", },
+ {},
+};
+#endif
+
static struct platform_driver orion_nand_driver = {
.remove = __devexit_p(orion_nand_remove),
.driver = {
.name = "orion_nand",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(orion_nand_of_match_table),
},
};
--
1.7.9.1
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