lkml.org 
[lkml]   [2017]   [Jul]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 5/8] irqchip: stm32: fix initial values
Date
From: Ludovic Barre <ludovic.barre@st.com>

-after cold boot, imr default value depend of hw configuration
-after hot reboot the registers must be cleared to avoid residue

Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
---
drivers/irqchip/irq-stm32-exti.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c
index 69ae09d..3c7077d 100644
--- a/drivers/irqchip/irq-stm32-exti.c
+++ b/drivers/irqchip/irq-stm32-exti.c
@@ -246,7 +246,16 @@ static int __init stm32_exti_init(struct stm32_exti_bank **stm32_exti_banks,
irqs_mask = readl_relaxed(base + stm32_bank->rtsr_ofst);
stm32_bank->irqs_mask = irqs_mask;
nr_exti = fls(readl_relaxed(base + stm32_bank->rtsr_ofst));
+
+ /*
+ * This IP has no reset, so after hot reboot we should
+ * clear registers to avoid residue
+ */
+ writel_relaxed(0, base + stm32_bank->imr_ofst);
+ writel_relaxed(0, base + stm32_bank->emr_ofst);
writel_relaxed(0, base + stm32_bank->rtsr_ofst);
+ writel_relaxed(0, base + stm32_bank->ftsr_ofst);
+ writel_relaxed(~0UL, base + stm32_bank->pr_ofst);

pr_info("%s: bank%d, External IRQs available:%#x\n",
node->full_name, i, irqs_mask);
--
2.7.4
\
 
 \ /
  Last update: 2017-07-07 09:29    [W:0.064 / U:15.504 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site