From: Bean Huo <beanhuo@outlook.com>
To: "dwmw2@infradead.org" <dwmw2@infradead.org>,
"computersforpeace@gmail.com" <computersforpeace@gmail.com>,
"boris.brezillon@free-elections.com"
<boris.brezillon@free-elections.com>,
"marek.vasut@gmail.com" <marek.vasut@gmail.com>,
"richard@nod.at" <richard@nod.at>,
"cyrille.pitchen@wedev4u.fr" <cyrille.pitchen@wedev4u.fr>,
"robh+dt@kernel.org" <robh+dt@kernel.org>,
"mark.rutland@arm.com" <mark.rutland@arm.com>,
"linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>
Cc: beanhuo <beanhuo@micron.com>
Subject: [PATCH v1 2/3] mtd: probe: probe dual die entry from devicetree binding
Date: Wed, 21 Feb 2018 19:32:34 +0000 [thread overview]
Message-ID: <DM2PR12MB001471EC3E5B6841C61ED9FEA6CE0@DM2PR12MB0014.namprd12.prod.outlook.com> (raw)
In-Reply-To: <1519241514-6466-1-git-send-email-beanhuo@outlook.com>
From: beanhuo <beanhuo@micron.com>
The device_stack property now will be initialized when devicetree
has an entry compatible with "dual_die_stack".
Signed-off-by: beanhuo <beanhuo@micron.com>
---
drivers/mtd/chips/cfi_probe.c | 7 +++++++
include/linux/mtd/cfi.h | 8 ++++++++
2 files changed, 15 insertions(+)
diff --git a/drivers/mtd/chips/cfi_probe.c b/drivers/mtd/chips/cfi_probe.c
index e8d0164..6182406 100644
--- a/drivers/mtd/chips/cfi_probe.c
+++ b/drivers/mtd/chips/cfi_probe.c
@@ -17,6 +17,7 @@
#include <linux/mtd/map.h>
#include <linux/mtd/cfi.h>
#include <linux/mtd/gen_probe.h>
+#include <linux/of_platform.h>
//#define DEBUG_CFI
@@ -159,6 +160,7 @@ static int __xipram cfi_chip_setup(struct map_info *map,
int num_erase_regions = cfi_read_query(map, base + (0x10 + 28)*ofs_factor);
int i;
int addr_unlock1 = 0x555, addr_unlock2 = 0x2AA;
+ struct device_node __maybe_unused *np = map->device_node;
xip_enable(base, map, cfi);
#ifdef DEBUG_CFI
@@ -177,6 +179,11 @@ static int __xipram cfi_chip_setup(struct map_info *map,
cfi->sector_erase_cmd = CMD(0x30);
+ cfi->device_stack = CFI_DEVICESTACK_1DIE;
+#ifdef CONFIG_OF
+ if (np && of_property_read_bool(np, "dual-die-stack"))
+ cfi->device_stack = CFI_DEVICESTACK_2DIE;
+#endif
/* Read the CFI info structure */
xip_disable_qry(base, map, cfi);
for (i=0; i<(sizeof(struct cfi_ident) + num_erase_regions * 4); i++)
diff --git a/include/linux/mtd/cfi.h b/include/linux/mtd/cfi.h
index 9b57a9b..bda37a4 100644
--- a/include/linux/mtd/cfi.h
+++ b/include/linux/mtd/cfi.h
@@ -277,11 +277,19 @@ struct cfi_bri_query {
#define CFI_MODE_CFI 1
#define CFI_MODE_JEDEC 0
+/* These values represent the die count of chip stack.
+ * So far, there only exists two type of stack device,
+ * single or dual die.
+ */
+#define CFI_DEVICESTACK_1DIE 1
+#define CFI_DEVICESTACK_2DIE 2
+
struct cfi_private {
uint16_t cmdset;
void *cmdset_priv;
int interleave;
int device_type;
+ int device_stack; /* Device stack type, single die or dual die. */
int cfi_mode; /* Are we a JEDEC device pretending to be CFI? */
int addr_unlock1;
int addr_unlock2;
--
2.7.4
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Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/
next prev parent reply other threads:[~2018-02-21 19:32 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1519241514-6466-1-git-send-email-beanhuo@outlook.com>
2018-02-21 19:32 ` [PATCH v1 1/3] mtd: physmap: add dual die entry in devicetree binding Bean Huo
2018-02-22 13:05 ` Boris Brezillon
2018-02-23 11:07 ` Bean Huo
2018-02-23 15:53 ` Boris Brezillon
2018-02-21 19:32 ` Bean Huo [this message]
2018-02-22 13:02 ` [PATCH v1 2/3] mtd: probe: probe dual die entry from " Boris Brezillon
2018-02-23 11:14 ` Bean Huo
2018-02-21 19:32 ` [PATCH v1 3/3] drivers: mtd: chips: add support for the dual die stacked PNOR Bean Huo
2018-02-22 13:33 ` Boris Brezillon
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