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wl1271: Add pre-power-on sleep
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 <juuso.oikarinen@nokia.com> Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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@ -458,7 +458,9 @@ int wl1271_plt_stop(struct wl1271 *wl);
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#define WL1271_TX_QUEUE_MAX_LENGTH 20
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#define WL1271_TX_QUEUE_MAX_LENGTH 20
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/* WL1271 needs a 200ms sleep after power on */
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/* WL1271 needs a 200ms sleep after power on, and a 20ms sleep before power
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on in case is has been shut down shortly before */
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#define WL1271_PRE_POWER_ON_SLEEP 20 /* in miliseconds */
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#define WL1271_POWER_ON_SLEEP 200 /* in miliseconds */
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#define WL1271_POWER_ON_SLEEP 200 /* in miliseconds */
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static inline bool wl1271_11a_enabled(void)
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static inline bool wl1271_11a_enabled(void)
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@ -618,6 +618,7 @@ static int wl1271_chip_wakeup(struct wl1271 *wl)
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struct wl1271_partition_set partition;
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struct wl1271_partition_set partition;
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int ret = 0;
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int ret = 0;
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msleep(WL1271_PRE_POWER_ON_SLEEP);
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wl1271_power_on(wl);
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wl1271_power_on(wl);
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msleep(WL1271_POWER_ON_SLEEP);
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msleep(WL1271_POWER_ON_SLEEP);
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wl1271_spi_reset(wl);
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wl1271_spi_reset(wl);
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