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leds: qpnp-wled: maintain wled state 

Enable/disable the wled module only if it changes
the state.

Change-Id: I754a7ac23cd5ec6fea1ea2e6d4dd2d3f7c44ed37
Signed-off-by: Mohan Pallaka <mpallaka@codeaurora.org>
This commit is contained in:
Mohan Pallaka 2015-09-21 16:39:02 -07:00 committed by Abinaya P
parent 8121196b46
commit 1fd9fce807
1 changed files with 10 additions and 5 deletions
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15
drivers/leds/leds-qpnp-wled.c
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@ -256,6 +256,7 @@ struct qpnp_wled {
bool en_cabc;
bool disp_type_amoled;
bool en_ext_pfet_sc_pro;
bool prev_state;
};
/* helper to read a pmic register */
@ -690,13 +691,17 @@ static void qpnp_wled_work(struct work_struct *work)
}
}
rc = qpnp_wled_module_en(wled, wled->ctrl_base, !!level);
if (!!level != wled->prev_state) {
rc = qpnp_wled_module_en(wled, wled->ctrl_base, !!level);
if (rc) {
dev_err(&wled->spmi->dev, "wled %sable failed\n",
level ? "en" : "dis");
goto unlock_mutex;
if (rc) {
dev_err(&wled->spmi->dev, "wled %sable failed\n",
level ? "en" : "dis");
goto unlock_mutex;
}
}
wled->prev_state = !!level;
unlock_mutex:
mutex_unlock(&wled->lock);
}