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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>
This commit is contained in:
Jamie Lentin 2012-04-18 11:06:42 +01:00 committed by Jason Cooper
parent a0fabf722c
commit 858156bd6c
2 changed files with 26 additions and 1 deletions
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15
arch/arm/boot/dts/kirkwood.dtsi
View File

@ -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";
};
};
};

12
arch/arm/mach-kirkwood/common.c
View File

@ -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 */