From: Alan Ott <alan-yzvJWuRpmD1zbRFIqnYvSA@public.gmane.org>
To: linux-zigbee-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Alan Ott <alan-yzvJWuRpmD1zbRFIqnYvSA@public.gmane.org>
Subject: [PATCH 3/4] mrf24j40: Increase max SPI speed to 10MHz
Date: Mon, 18 Mar 2013 18:06:42 -0400 [thread overview]
Message-ID: <1363644403-11003-4-git-send-email-alan@signal11.us> (raw)
In-Reply-To: <1363644403-11003-1-git-send-email-alan-yzvJWuRpmD1zbRFIqnYvSA@public.gmane.org>
Upon consulting the datasheet further, it does indicates a maximum speed
for SCK at 10MHz.
Signed-off-by: Alan Ott <alan-yzvJWuRpmD1zbRFIqnYvSA@public.gmane.org>
---
drivers/net/ieee802154/mrf24j40.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ieee802154/mrf24j40.c b/drivers/net/ieee802154/mrf24j40.c
index 582c0a3..b4f9b67 100644
--- a/drivers/net/ieee802154/mrf24j40.c
+++ b/drivers/net/ieee802154/mrf24j40.c
@@ -92,9 +92,8 @@ struct mrf24j40 {
#define MRF24J40_READLONG(reg) (1 << 15 | (reg) << 5)
#define MRF24J40_WRITELONG(reg) (1 << 15 | (reg) << 5 | 1 << 4)
-/* Maximum speed to run the device at. TODO: Get the real max value from
- * someone at Microchip since it isn't in the datasheet. */
-#define MAX_SPI_SPEED_HZ 1000000
+/* The datasheet indicates the theoretical maximum for SCK to be 10MHz */
+#define MAX_SPI_SPEED_HZ 10000000
#define printdev(X) (&X->spi->dev)
--
1.7.11.2
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next prev parent reply other threads:[~2013-03-18 22:06 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-18 22:06 [PATCH 0/4] Misc MRF24J40 Fixes Alan Ott
2013-03-18 22:06 ` [PATCH 1/4] mrf24j40: pinctrl support Alan Ott
[not found] ` <1363644403-11003-1-git-send-email-alan-yzvJWuRpmD1zbRFIqnYvSA@public.gmane.org>
2013-03-18 22:06 ` [PATCH 2/4] mrf24j40: Warn if transmit interrupts timeout Alan Ott
2013-03-18 22:06 ` Alan Ott [this message]
2013-03-18 22:06 ` [PATCH 4/4] mrf24j40: Fix byte-order of IEEE address Alan Ott
2013-03-19 14:08 ` [PATCH 0/4] Misc MRF24J40 Fixes David Miller
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