queue-5.0/irqchip-stm32-don-t-clear-rising-falling-config-regi.patch

   1 From 3dc1bc00447a571aea08a6d3fdcc09e16fe82ab8 Mon Sep 17 00:00:00 2001
   2 From: Fabien Dessenne <fabien.dessenne@st.com>
   3 Date: Thu, 7 Mar 2019 19:40:35 +0100
   4 Subject: irqchip/stm32: Don't clear rising/falling config registers at init
   5
   6 [ Upstream commit 0dda09666f50eae9c5b794dd89b1fd8a8d89d714 ]
   7
   8 Falling and rising configuration and status registers are not banked.
   9 As they are shared with M4 co-processor, they should not be cleared
  10 at probe time, else M4 co-processor configuration will be lost.
  11
  12 Fixes: f9fc1745501e ("irqchip/stm32: Add host and driver data structures")
  13 Signed-off-by: Loic Pallardy <loic.pallardy@st.com>
  14 Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
  15 Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
  16 Signed-off-by: Sasha Levin <sashal@kernel.org>
  17 ---
  18  drivers/irqchip/irq-stm32-exti.c | 5 -----
  19  1 file changed, 5 deletions(-)
  20
  21 diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c
  22 index a93296b9b45d..162a7f547f9e 100644
  23 --- a/drivers/irqchip/irq-stm32-exti.c
  24 +++ b/drivers/irqchip/irq-stm32-exti.c
  25 @@ -735,11 +735,6 @@ stm32_exti_chip_data *stm32_exti_chip_init(struct stm32_exti_host_data *h_data,
  26          */
  27         writel_relaxed(0, base + stm32_bank->imr_ofst);
  28         writel_relaxed(0, base + stm32_bank->emr_ofst);
  29 -       writel_relaxed(0, base + stm32_bank->rtsr_ofst);
  30 -       writel_relaxed(0, base + stm32_bank->ftsr_ofst);
  31 -       writel_relaxed(~0UL, base + stm32_bank->rpr_ofst);
  32 -       if (stm32_bank->fpr_ofst != UNDEF_REG)
  33 -               writel_relaxed(~0UL, base + stm32_bank->fpr_ofst);
  34
  35         pr_info("%pOF: bank%d\n", h_data->node, bank_idx);
  36
  37 --
  38 2.19.1
  39