From d9b238b002b7abc8df566a57c2bdac115571976c Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Fri, 7 Nov 2014 10:35:03 -0600
Subject: [PATCH 1/3] =?UTF-8?q?Extend=20MTD=20support=20to=20M25P16.=20Fro?=
 =?UTF-8?q?m=20S=C3=A9bastien=20Lorquet?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 drivers/mtd/m25px.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/mtd/m25px.c b/drivers/mtd/m25px.c
index c49585ebb0b..6bab204a263 100644
--- a/drivers/mtd/m25px.c
+++ b/drivers/mtd/m25px.c
@@ -90,6 +90,7 @@
 #define M25P_RES_ID               0x13
 #define M25P_M25P1_CAPACITY       0x11 /* 1 M-bit */
 #define M25P_EN25F80_CAPACITY     0x14 /* 8 M-bit */
+#define M25P_M25P16_CAPACITY      0x15 /* 16 M-bit */
 #define M25P_M25P32_CAPACITY      0x16 /* 32 M-bit */
 #define M25P_M25P64_CAPACITY      0x17 /* 64 M-bit */
 #define M25P_M25P128_CAPACITY     0x18 /* 128 M-bit */
@@ -116,6 +117,16 @@
 #define M25P_EN25F80_SUBSECT_SHIFT 12   /* Sub-Sector size 1 << 12 = 4,096 */
 #define M25P_EN25F80_NSUBSECTORS  256
 
+/*  M25P16 capacity is 2,097,152 bytes:
+ *  (32 sectors) * (65,536 bytes per sector)
+ *  (8192 pages) * (256 bytes per page)
+ */
+
+#define M25P_M25P16_SECTOR_SHIFT  16    /* Sector size 1 << 16 = 65,536 */
+#define M25P_M25P16_NSECTORS      32
+#define M25P_M25P16_PAGE_SHIFT    8     /* Page size 1 << 8 = 256 */
+#define M25P_M25P16_NPAGES        8192
+
 /*  M25P32 capacity is 4,194,304 bytes:
  *  (64 sectors) * (65,536 bytes per sector)
  *  (16384 pages) * (256 bytes per page)
@@ -349,6 +360,16 @@ static inline int m25p_readid(struct m25p_dev_s *priv)
 #endif
            return OK;
         }
+      else if (capacity == M25P_M25P16_CAPACITY)
+        {
+           /* Save the FLASH geometry */
+
+           priv->sectorshift = M25P_M25P16_SECTOR_SHIFT;
+           priv->nsectors    = M25P_M25P16_NSECTORS;
+           priv->pageshift   = M25P_M25P16_PAGE_SHIFT;
+           priv->npages      = M25P_M25P16_NPAGES;
+           return OK;
+        }
       else if (capacity == M25P_M25P32_CAPACITY)
         {
            /* Save the FLASH geometry */

From 8d8928c68a7c5c8bdd9945b30e834d49d22102a8 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Fri, 7 Nov 2014 10:37:18 -0600
Subject: [PATCH 2/3] Update ChangeLog

---
 ChangeLog | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index d4371e83fbc..2462127a420 100755
--- a/ChangeLog
+++ b/ChangeLog
@@ -8911,4 +8911,5 @@
 	* libc/stdio/lib_tempnam.c, lib_tmpnam.c, Kconfig, Make.defs and
 	  include/stdio.h: Add tmpnam() and tempnam() (2014-11-05).
 	* drivers/rwbuffer.c: Fix typo that can cause compiler error (2014-11-05).
-
+	* drivers/mtd/m25px.c: Extend MTD support to M25P16. From Sébastien
+	  Lorquet (2014-11-07).

From fcc2a1bb4bfca2cb1d0b3812aceba9f509fbfcb2 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Fri, 7 Nov 2014 15:54:24 -0600
Subject: [PATCH 3/3] Fix incorrect comment

---
 sched/semaphore/sem_post.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/sched/semaphore/sem_post.c b/sched/semaphore/sem_post.c
index 4540160823a..3e3d1d868c8 100644
--- a/sched/semaphore/sem_post.c
+++ b/sched/semaphore/sem_post.c
@@ -94,9 +94,7 @@
  *   0 (OK) or -1 (ERROR) if unsuccessful
  *
  * Assumptions:
- *   This function cannot be called from an interrupt handler.
- *   It assumes the currently executing task is the one that
- *   is performing the unlock.
+ *   This function may be called from an interrupt handler.
  *
  ****************************************************************************/