mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 22:23:27 +00:00
defd016aef
All of the mtd patches are upstreamed to 5.18. Add tags indicating this. Signed-off-by: Nick Hainke <vincent@systemli.org>
116 lines
3.8 KiB
Diff
116 lines
3.8 KiB
Diff
From: Florian Fainelli <f.fainelli@gmail.com>
|
|
Subject: [PATCH v3 6/9] mtd: rawnand: brcmnand: Add platform data structure for BCMA
|
|
Date: Fri, 07 Jan 2022 10:46:11 -0800
|
|
Content-Type: text/plain; charset="utf-8"
|
|
|
|
Update the BCMA's chipcommon nand flash driver to detect which
|
|
chip-select is used and pass that information via platform data to the
|
|
brcmnand driver. Make sure that the brcmnand platform data structure is
|
|
always at the beginning of the platform data of the "nflash" device
|
|
created by BCMA to allow brcmnand to safely de-reference it.
|
|
|
|
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
|
|
---
|
|
MAINTAINERS | 1 +
|
|
drivers/bcma/driver_chipcommon_nflash.c | 20 +++++++++++++++++++-
|
|
include/linux/bcma/bcma_driver_chipcommon.h | 5 +++++
|
|
include/linux/platform_data/brcmnand.h | 12 ++++++++++++
|
|
4 files changed, 37 insertions(+), 1 deletion(-)
|
|
create mode 100644 include/linux/platform_data/brcmnand.h
|
|
|
|
--- a/MAINTAINERS
|
|
+++ b/MAINTAINERS
|
|
@@ -3712,6 +3712,7 @@ L: linux-mtd@lists.infradead.org
|
|
L: bcm-kernel-feedback-list@broadcom.com
|
|
S: Maintained
|
|
F: drivers/mtd/nand/raw/brcmnand/
|
|
+F: include/linux/platform_data/brcmnand.h
|
|
|
|
BROADCOM SYSTEMPORT ETHERNET DRIVER
|
|
M: Florian Fainelli <f.fainelli@gmail.com>
|
|
--- a/drivers/bcma/driver_chipcommon_nflash.c
|
|
+++ b/drivers/bcma/driver_chipcommon_nflash.c
|
|
@@ -7,18 +7,28 @@
|
|
|
|
#include "bcma_private.h"
|
|
|
|
+#include <linux/bitops.h>
|
|
#include <linux/platform_device.h>
|
|
+#include <linux/platform_data/brcmnand.h>
|
|
#include <linux/bcma/bcma.h>
|
|
|
|
+/* Alternate NAND controller driver name in order to allow both bcm47xxnflash
|
|
+ * and bcma_brcmnand to be built into the same kernel image.
|
|
+ */
|
|
+static const char *bcma_nflash_alt_name = "bcma_brcmnand";
|
|
+
|
|
struct platform_device bcma_nflash_dev = {
|
|
.name = "bcma_nflash",
|
|
.num_resources = 0,
|
|
};
|
|
|
|
+static const char *probes[] = { "bcm47xxpart", NULL };
|
|
+
|
|
/* Initialize NAND flash access */
|
|
int bcma_nflash_init(struct bcma_drv_cc *cc)
|
|
{
|
|
struct bcma_bus *bus = cc->core->bus;
|
|
+ u32 reg;
|
|
|
|
if (bus->chipinfo.id != BCMA_CHIP_ID_BCM4706 &&
|
|
cc->core->id.rev != 38) {
|
|
@@ -33,8 +43,16 @@ int bcma_nflash_init(struct bcma_drv_cc
|
|
|
|
cc->nflash.present = true;
|
|
if (cc->core->id.rev == 38 &&
|
|
- (cc->status & BCMA_CC_CHIPST_5357_NAND_BOOT))
|
|
+ (cc->status & BCMA_CC_CHIPST_5357_NAND_BOOT)) {
|
|
cc->nflash.boot = true;
|
|
+ /* Determine the chip select that is being used */
|
|
+ reg = bcma_cc_read32(cc, BCMA_CC_NAND_CS_NAND_SELECT) & 0xff;
|
|
+ cc->nflash.brcmnand_info.chip_select = ffs(reg) - 1;
|
|
+ cc->nflash.brcmnand_info.part_probe_types = probes;
|
|
+ cc->nflash.brcmnand_info.ecc_stepsize = 512;
|
|
+ cc->nflash.brcmnand_info.ecc_strength = 1;
|
|
+ bcma_nflash_dev.name = bcma_nflash_alt_name;
|
|
+ }
|
|
|
|
/* Prepare platform device, but don't register it yet. It's too early,
|
|
* malloc (required by device_private_init) is not available yet. */
|
|
--- a/include/linux/bcma/bcma_driver_chipcommon.h
|
|
+++ b/include/linux/bcma/bcma_driver_chipcommon.h
|
|
@@ -3,6 +3,7 @@
|
|
#define LINUX_BCMA_DRIVER_CC_H_
|
|
|
|
#include <linux/platform_device.h>
|
|
+#include <linux/platform_data/brcmnand.h>
|
|
#include <linux/gpio.h>
|
|
|
|
/** ChipCommon core registers. **/
|
|
@@ -599,6 +600,10 @@ struct bcma_sflash {
|
|
|
|
#ifdef CONFIG_BCMA_NFLASH
|
|
struct bcma_nflash {
|
|
+ /* Must be the fist member for the brcmnand driver to
|
|
+ * de-reference that structure.
|
|
+ */
|
|
+ struct brcmnand_platform_data brcmnand_info;
|
|
bool present;
|
|
bool boot; /* This is the flash the SoC boots from */
|
|
};
|
|
--- /dev/null
|
|
+++ b/include/linux/platform_data/brcmnand.h
|
|
@@ -0,0 +1,12 @@
|
|
+/* SPDX-License-Identifier: GPL-2.0-only */
|
|
+#ifndef BRCMNAND_PLAT_DATA_H
|
|
+#define BRCMNAND_PLAT_DATA_H
|
|
+
|
|
+struct brcmnand_platform_data {
|
|
+ int chip_select;
|
|
+ const char * const *part_probe_types;
|
|
+ unsigned int ecc_stepsize;
|
|
+ unsigned int ecc_strength;
|
|
+};
|
|
+
|
|
+#endif /* BRCMNAND_PLAT_DATA_H */
|