| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <1396359901-32656-4-git-send-email-peter.ujfalusi@ti.com> Date: Tue, 1 Apr 2014 16:45:01 +0300 From: Peter Ujfalusi <peter.ujfalusi@...com> To: <lee.jones@...aro.org> CC: <linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>, <sameo@...ux.intel.com>, <nm@...com> Subject: [RESEND 3/3] mfd: twl6040: Clear the interrupt ID register before requesting IRQ If for some reason the boot loader enabled the audpwron GPIO we will have pending IRQs to be handled. This seams to break twl6040 for some reason leading to non working i2c communication (i2c timeouts). Clearing the INTID register after we requested the audpwron GPIO (and set it to low) will ensure that the chip will operate normally in this case as well. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com> --- drivers/mfd/twl6040.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/mfd/twl6040.c b/drivers/mfd/twl6040.c index dc5c05940e96..2e6504a8e1e3 100644 --- a/drivers/mfd/twl6040.c +++ b/drivers/mfd/twl6040.c @@ -687,6 +687,9 @@ static int twl6040_probe(struct i2c_client *client, GPIOF_OUT_INIT_LOW, "audpwron"); if (ret) goto gpio_err; + + /* Clear any pending interrupt */ + twl6040_reg_read(twl6040, TWL6040_REG_INTID); } ret = regmap_add_irq_chip(twl6040->regmap, twl6040->irq, IRQF_ONESHOT, -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists