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Message-Id: <0949c1b7bd8b9d0034e77601a9af73c712d26d4a.1545784679.git.fthain@telegraphics.com.au>
Date: Wed, 26 Dec 2018 11:37:59 +1100
From: Finn Thain <fthain@...egraphics.com.au>
To: Arnd Bergmann <arnd@...db.de>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Paul Mackerras <paulus@...ba.org>,
Michael Ellerman <mpe@...erman.id.au>
Cc: linux-kernel@...r.kernel.org, linux-m68k@...ts.linux-m68k.org,
linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v8 25/25] powerpc: Remove pmac_xpram_{read,write} functions
The arch_nvram_ops methods provide a uniform API to replace the
nvram_{read,write}_byte exports and pmac_xpram_{read,write} functions.
The latter API gets removed in this patch. To make that possible, add
a get_partition() method to the nvram_ops struct and call it from
pmac_time_init().
pmac_xpram_read() becomes unused as pmac_time_init() is converted to the
arch_nvram_ops API. pmac_xpram_write() was already unused.
As a bonus, drivers/char/nvram.c benefits from the API conversion by the
removal of an #ifdef.
Signed-off-by: Finn Thain <fthain@...egraphics.com.au>
Tested-by: Stan Johnson <userm57@...oo.com>
---
arch/powerpc/include/asm/nvram.h | 4 ----
arch/powerpc/kernel/nvram_64.c | 3 +++
arch/powerpc/kernel/setup_32.c | 3 +++
arch/powerpc/platforms/powermac/nvram.c | 28 +++----------------------
arch/powerpc/platforms/powermac/time.c | 17 +++++++++++----
drivers/char/nvram.c | 6 ++----
include/linux/nvram.h | 1 +
7 files changed, 25 insertions(+), 37 deletions(-)
diff --git a/arch/powerpc/include/asm/nvram.h b/arch/powerpc/include/asm/nvram.h
index 629a5cdcc865..a7916b1c3f3a 100644
--- a/arch/powerpc/include/asm/nvram.h
+++ b/arch/powerpc/include/asm/nvram.h
@@ -74,10 +74,6 @@ extern loff_t nvram_find_partition(const char *name, int sig, int *out_size);
/* Return partition offset in nvram */
extern int pmac_get_partition(int partition);
-/* Direct access to XPRAM on PowerMacs */
-extern u8 pmac_xpram_read(int xpaddr);
-extern void pmac_xpram_write(int xpaddr, u8 data);
-
/* Initialize NVRAM OS partition */
extern int __init nvram_init_os_partition(struct nvram_os_partition *part);
diff --git a/arch/powerpc/kernel/nvram_64.c b/arch/powerpc/kernel/nvram_64.c
index 6d0461c02e0f..2190ce75467d 100644
--- a/arch/powerpc/kernel/nvram_64.c
+++ b/arch/powerpc/kernel/nvram_64.c
@@ -1093,6 +1093,9 @@ const struct nvram_ops arch_nvram_ops = {
.write = ppc_nvram_write,
.get_size = ppc_nvram_get_size,
.sync = ppc_nvram_sync,
+#ifdef CONFIG_PPC_PMAC
+ .get_partition = pmac_get_partition,
+#endif
};
EXPORT_SYMBOL(arch_nvram_ops);
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index 96782abb0c41..a76cfb125eb1 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -184,6 +184,9 @@ const struct nvram_ops arch_nvram_ops = {
.write_byte = ppc_nvram_write_byte,
.get_size = ppc_nvram_get_size,
.sync = ppc_nvram_sync,
+#ifdef CONFIG_PPC_PMAC
+ .get_partition = pmac_get_partition,
+#endif
};
EXPORT_SYMBOL(arch_nvram_ops);
diff --git a/arch/powerpc/platforms/powermac/nvram.c b/arch/powerpc/platforms/powermac/nvram.c
index 9360cdc408c1..38c5cdd44d7b 100644
--- a/arch/powerpc/platforms/powermac/nvram.c
+++ b/arch/powerpc/platforms/powermac/nvram.c
@@ -629,29 +629,7 @@ int __init pmac_nvram_init(void)
int pmac_get_partition(int partition)
{
- return nvram_partitions[partition];
+ if (machine_is(powermac))
+ return nvram_partitions[partition];
+ return -1;
}
-
-u8 pmac_xpram_read(int xpaddr)
-{
- int offset = pmac_get_partition(pmac_nvram_XPRAM);
-
- if (offset < 0 || xpaddr < 0 || xpaddr > 0x100)
- return 0xff;
-
- return ppc_md.nvram_read_val(xpaddr + offset);
-}
-
-void pmac_xpram_write(int xpaddr, u8 data)
-{
- int offset = pmac_get_partition(pmac_nvram_XPRAM);
-
- if (offset < 0 || xpaddr < 0 || xpaddr > 0x100)
- return;
-
- ppc_md.nvram_write_val(xpaddr + offset, data);
-}
-
-EXPORT_SYMBOL(pmac_get_partition);
-EXPORT_SYMBOL(pmac_xpram_read);
-EXPORT_SYMBOL(pmac_xpram_write);
diff --git a/arch/powerpc/platforms/powermac/time.c b/arch/powerpc/platforms/powermac/time.c
index b36ddee17c87..7df08c7d348f 100644
--- a/arch/powerpc/platforms/powermac/time.c
+++ b/arch/powerpc/platforms/powermac/time.c
@@ -24,6 +24,7 @@
#include <linux/interrupt.h>
#include <linux/hardirq.h>
#include <linux/rtc.h>
+#include <linux/nvram.h>
#include <asm/sections.h>
#include <asm/prom.h>
@@ -70,13 +71,21 @@ long __init pmac_time_init(void)
s32 delta = 0;
#if defined(CONFIG_NVRAM) && defined(CONFIG_PPC32)
int dst;
+ int offset = arch_nvram_ops.get_partition(pmac_nvram_XPRAM);
- delta = ((s32)pmac_xpram_read(PMAC_XPRAM_MACHINE_LOC + 0x9)) << 16;
- delta |= ((s32)pmac_xpram_read(PMAC_XPRAM_MACHINE_LOC + 0xa)) << 8;
- delta |= pmac_xpram_read(PMAC_XPRAM_MACHINE_LOC + 0xb);
+ if (offset < 0)
+ return 0;
+
+ delta = arch_nvram_ops.read_byte(offset + PMAC_XPRAM_MACHINE_LOC + 9);
+ delta <<= 8;
+ delta |= arch_nvram_ops.read_byte(offset + PMAC_XPRAM_MACHINE_LOC + 10);
+ delta <<= 8;
+ delta |= arch_nvram_ops.read_byte(offset + PMAC_XPRAM_MACHINE_LOC + 11);
+
if (delta & 0x00800000UL)
delta |= 0xFF000000UL;
- dst = ((pmac_xpram_read(PMAC_XPRAM_MACHINE_LOC + 0x8) & 0x80) != 0);
+ dst = arch_nvram_ops.read_byte(offset + PMAC_XPRAM_MACHINE_LOC + 8);
+ dst &= 0x80;
printk("GMT Delta read from XPRAM: %d minutes, DST: %s\n", delta/60,
dst ? "on" : "off");
#endif
diff --git a/drivers/char/nvram.c b/drivers/char/nvram.c
index 8cbfed86ec8d..e19d9be214cf 100644
--- a/drivers/char/nvram.c
+++ b/drivers/char/nvram.c
@@ -324,8 +324,7 @@ static long nvram_misc_ioctl(struct file *file, unsigned int cmd,
/* fall through */
case IOC_NVRAM_GET_OFFSET:
ret = -EINVAL;
-#ifdef CONFIG_PPC_PMAC
- if (machine_is(powermac)) {
+ if (arch_nvram_ops.get_partition != NULL) {
int part, offset;
if (copy_from_user(&part, (void __user *)arg,
@@ -333,7 +332,7 @@ static long nvram_misc_ioctl(struct file *file, unsigned int cmd,
return -EFAULT;
if (part < pmac_nvram_OF || part > pmac_nvram_NR)
return -EINVAL;
- offset = pmac_get_partition(part);
+ offset = arch_nvram_ops.get_partition(part);
if (offset < 0)
return -EINVAL;
if (copy_to_user((void __user *)arg,
@@ -341,7 +340,6 @@ static long nvram_misc_ioctl(struct file *file, unsigned int cmd,
return -EFAULT;
ret = 0;
}
-#endif
break;
case IOC_NVRAM_SYNC:
if (arch_nvram_ops.sync != NULL) {
diff --git a/include/linux/nvram.h b/include/linux/nvram.h
index 251472f1b2bd..4ccb491d9871 100644
--- a/include/linux/nvram.h
+++ b/include/linux/nvram.h
@@ -12,6 +12,7 @@ struct nvram_ops {
ssize_t (*get_size)(void);
#ifdef CONFIG_PPC
long (*sync)(void);
+ int (*get_partition)(int);
#else
long (*set_checksum)(void);
long (*initialize)(void);
--
2.19.2
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