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ARM: zynq: Simplify SLCR initialization 

Based on
"mfd: syscon: Decouple syscon interface from platform devices"
(sha1: bdb0066df9)
SLCR driver can use syscon/regmap drivers directly.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Michal Simek 2014-12-11 11:31:30 +01:00
parent bb9cac24d7
commit 3329659df0
2 changed files with 7 additions and 30 deletions
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2
arch/arm/mach-zynq/common.c
View File

@ -146,8 +146,6 @@ static void __init zynq_init_machine(void)
platform_device_register(&zynq_cpuidle_device);
platform_device_register_full(&devinfo);
zynq_slcr_init();
}
static void __init zynq_timer_init(void)

35
arch/arm/mach-zynq/slcr.c
View File

@ -47,11 +47,6 @@ static struct regmap *zynq_slcr_regmap;
*/
static int zynq_slcr_write(u32 val, u32 offset)
{
if (!zynq_slcr_regmap) {
writel(val, zynq_slcr_base + offset);
return 0;
}
return regmap_write(zynq_slcr_regmap, offset, val);
}
@ -65,12 +60,7 @@ static int zynq_slcr_write(u32 val, u32 offset)
*/
static int zynq_slcr_read(u32 *val, u32 offset)
{
if (zynq_slcr_regmap)
return regmap_read(zynq_slcr_regmap, offset, val);
*val = readl(zynq_slcr_base + offset);
return 0;
return regmap_read(zynq_slcr_regmap, offset, val);
}
/**
@ -195,23 +185,6 @@ void zynq_slcr_cpu_state_write(int cpu, bool die)
writel(state, zynq_slcr_base + SLCR_REBOOT_STATUS_OFFSET);
}
/**
* zynq_slcr_init - Regular slcr driver init
* Return: 0 on success, negative errno otherwise.
*
* Called early during boot from platform code to remap SLCR area.
*/
int __init zynq_slcr_init(void)
{
zynq_slcr_regmap = syscon_regmap_lookup_by_compatible("xlnx,zynq-slcr");
if (IS_ERR(zynq_slcr_regmap)) {
pr_err("%s: failed to find zynq-slcr\n", __func__);
return -ENODEV;
}
return 0;
}
/**
* zynq_early_slcr_init - Early slcr init function
*
@ -237,6 +210,12 @@ int __init zynq_early_slcr_init(void)
np->data = (__force void *)zynq_slcr_base;
zynq_slcr_regmap = syscon_regmap_lookup_by_compatible("xlnx,zynq-slcr");
if (IS_ERR(zynq_slcr_regmap)) {
pr_err("%s: failed to find zynq-slcr\n", __func__);
return -ENODEV;
}
/* unlock the SLCR so that registers can be changed */
zynq_slcr_unlock();