kirkwood: Allow nand to be configured via. devicetree
Add default configuration for NAND, to be enabled in your board config. Ensure
clock gating is set appropriately when the NAND is enabled.
Acked-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Jamie Lentin <jm@lentin.co.uk>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
diff --git a/arch/arm/boot/dts/kirkwood.dtsi b/arch/arm/boot/dts/kirkwood.dtsi
index 3474ef8..926528b 100644
--- a/arch/arm/boot/dts/kirkwood.dtsi
+++ b/arch/arm/boot/dts/kirkwood.dtsi
@@ -5,7 +5,7 @@
ocp@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@3000000 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ cle = <0>;
+ ale = <1>;
+ bank-width = <1>;
+ 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 @@
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 @@
/* 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 */