Return-path: Received: from smtp.nokia.com ([192.100.122.230]:60470 "EHLO mgw-mx03.nokia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757826AbZLKNlt (ORCPT ); Fri, 11 Dec 2009 08:41:49 -0500 From: Luciano Coelho To: linville@tuxdriver.com Cc: linux-wireless@vger.kernel.org, Juuso Oikarinen Subject: [PATCH v2 23/31] wl1271: Add pre-power-on sleep Date: Fri, 11 Dec 2009 15:41:02 +0200 Message-Id: <1260538870-32297-24-git-send-email-luciano.coelho@nokia.com> In-Reply-To: <1260538870-32297-1-git-send-email-luciano.coelho@nokia.com> References: <1260538870-32297-1-git-send-email-luciano.coelho@nokia.com> Sender: linux-wireless-owner@vger.kernel.org List-ID: From: Juuso Oikarinen This patch adds a short delay before powering on the wl1271. Normally, it is not needed, but if the wl1271 has been powered off shortly before, for reliable firmware-booting this small stabilization delay is required. Signed-off-by: Juuso Oikarinen Reviewed-by: Luciano Coelho Signed-off-by: Luciano Coelho --- drivers/net/wireless/wl12xx/wl1271.h | 4 +++- drivers/net/wireless/wl12xx/wl1271_main.c | 1 + 2 files changed, 4 insertions(+), 1 deletions(-) diff --git a/drivers/net/wireless/wl12xx/wl1271.h b/drivers/net/wireless/wl12xx/wl1271.h index 81e1c95..c965c4a 100644 --- a/drivers/net/wireless/wl12xx/wl1271.h +++ b/drivers/net/wireless/wl12xx/wl1271.h @@ -458,7 +458,9 @@ int wl1271_plt_stop(struct wl1271 *wl); #define WL1271_TX_QUEUE_MAX_LENGTH 20 -/* WL1271 needs a 200ms sleep after power on */ +/* WL1271 needs a 200ms sleep after power on, and a 20ms sleep before power + on in case is has been shut down shortly before */ +#define WL1271_PRE_POWER_ON_SLEEP 20 /* in miliseconds */ #define WL1271_POWER_ON_SLEEP 200 /* in miliseconds */ static inline bool wl1271_11a_enabled(void) diff --git a/drivers/net/wireless/wl12xx/wl1271_main.c b/drivers/net/wireless/wl12xx/wl1271_main.c index 0795bf3..0520b38 100644 --- a/drivers/net/wireless/wl12xx/wl1271_main.c +++ b/drivers/net/wireless/wl12xx/wl1271_main.c @@ -618,6 +618,7 @@ static int wl1271_chip_wakeup(struct wl1271 *wl) struct wl1271_partition_set partition; int ret = 0; + msleep(WL1271_PRE_POWER_ON_SLEEP); wl1271_power_on(wl); msleep(WL1271_POWER_ON_SLEEP); wl1271_spi_reset(wl); -- 1.6.3.3