From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752574Ab3KUGOE (ORCPT ); Thu, 21 Nov 2013 01:14:04 -0500 Received: from devils.ext.ti.com ([198.47.26.153]:53270 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751761Ab3KUGOA (ORCPT ); Thu, 21 Nov 2013 01:14:00 -0500 From: Milo Kim To: Bryan Wu CC: , , Milo Kim , =?UTF-8?q?Pali=20Roh=C3=A1r?= Subject: [PATCH 1/3] leds: lp5521/5523: Fix multiple engine usage bug Date: Thu, 21 Nov 2013 15:13:34 +0900 Message-ID: <1385014414-6400-1-git-send-email-milo.kim@ti.com> X-Mailer: git-send-email 1.7.10.4 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Whenever the engine is loaded by the user-application, the operation mode is reset first. But it has a problem in case of multiple engine used because previous engine settings are cleared. The driver should update not whole 8bits but each engine bit by masking. On the other hands, whole engines should be reset when the driver is unloaded and on initializing the LP5523 driver. So, new functions are used for this handling - lp5521/5523_stop_all_engines(). Cc: Pali Rohár Signed-off-by: Milo Kim --- drivers/leds/leds-lp5521.c | 18 ++++++++++++++++-- drivers/leds/leds-lp5523.c | 20 +++++++++++++++++--- 2 files changed, 33 insertions(+), 5 deletions(-) diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c index 0518835..26f89ac 100644 --- a/drivers/leds/leds-lp5521.c +++ b/drivers/leds/leds-lp5521.c @@ -152,12 +152,26 @@ static void lp5521_load_engine(struct lp55xx_chip *chip) lp5521_wait_opmode_done(); } -static void lp5521_stop_engine(struct lp55xx_chip *chip) +static void lp5521_stop_all_engines(struct lp55xx_chip *chip) { lp55xx_write(chip, LP5521_REG_OP_MODE, 0); lp5521_wait_opmode_done(); } +static void lp5521_stop_engine(struct lp55xx_chip *chip) +{ + enum lp55xx_engine_index idx = chip->engine_idx; + u8 mask[] = { + [LP55XX_ENGINE_1] = LP5521_MODE_R_M, + [LP55XX_ENGINE_2] = LP5521_MODE_G_M, + [LP55XX_ENGINE_3] = LP5521_MODE_B_M, + }; + + lp55xx_update_bits(chip, LP5521_REG_OP_MODE, mask[idx], 0); + + lp5521_wait_opmode_done(); +} + static void lp5521_run_engine(struct lp55xx_chip *chip, bool start) { int ret; @@ -568,7 +582,7 @@ static int lp5521_remove(struct i2c_client *client) struct lp55xx_led *led = i2c_get_clientdata(client); struct lp55xx_chip *chip = led->chip; - lp5521_stop_engine(chip); + lp5521_stop_all_engines(chip); lp55xx_unregister_sysfs(chip); lp55xx_unregister_leds(led, chip); lp55xx_deinit_device(chip); diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c index 6b553d9..2ce1723 100644 --- a/drivers/leds/leds-lp5523.c +++ b/drivers/leds/leds-lp5523.c @@ -187,12 +187,26 @@ static void lp5523_load_engine_and_select_page(struct lp55xx_chip *chip) lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]); } -static void lp5523_stop_engine(struct lp55xx_chip *chip) +static void lp5523_stop_all_engines(struct lp55xx_chip *chip) { lp55xx_write(chip, LP5523_REG_OP_MODE, 0); lp5523_wait_opmode_done(); } +static void lp5523_stop_engine(struct lp55xx_chip *chip) +{ + enum lp55xx_engine_index idx = chip->engine_idx; + u8 mask[] = { + [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M, + [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M, + [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M, + }; + + lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], 0); + + lp5523_wait_opmode_done(); +} + static void lp5523_turn_off_channels(struct lp55xx_chip *chip) { int i; @@ -303,7 +317,7 @@ static int lp5523_init_program_engine(struct lp55xx_chip *chip) } out: - lp5523_stop_engine(chip); + lp5523_stop_all_engines(chip); return ret; } @@ -778,7 +792,7 @@ static int lp5523_remove(struct i2c_client *client) struct lp55xx_led *led = i2c_get_clientdata(client); struct lp55xx_chip *chip = led->chip; - lp5523_stop_engine(chip); + lp5523_stop_all_engines(chip); lp55xx_unregister_sysfs(chip); lp55xx_unregister_leds(led, chip); lp55xx_deinit_device(chip); -- 1.7.9.5