linux-kernel - [PATCH v1 03/17] pinctrl: cy8c95x0: Allow most of the registers to be cached

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

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220902182650.83098-3-andriy.shevchenko@linux.intel.com>
Date:   Fri,  2 Sep 2022 21:26:36 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Patrick Rudolph <patrick.rudolph@...ements.com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1 03/17] pinctrl: cy8c95x0: Allow most of the registers to be cached

It's unclear why many of static registers were marked as volatile.
They are pretty much bidirectional and static in a sense that
written value is kept there until a new write or chip reset.
Drop those registers from the list to allow them to be cached.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/pinctrl/pinctrl-cy8c95x0.c | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-cy8c95x0.c b/drivers/pinctrl/pinctrl-cy8c95x0.c
index 521acfdeef38..5ef772d29a36 100644
--- a/drivers/pinctrl/pinctrl-cy8c95x0.c
+++ b/drivers/pinctrl/pinctrl-cy8c95x0.c
@@ -303,17 +303,6 @@ static bool cy8c95x0_volatile_register(struct device *dev, unsigned int reg)
 	switch (reg) {
 	case CY8C95X0_INPUT_(0) ... CY8C95X0_INPUT_(7):
 	case CY8C95X0_INTSTATUS_(0) ... CY8C95X0_INTSTATUS_(7):
-	case CY8C95X0_INTMASK:
-	case CY8C95X0_INVERT:
-	case CY8C95X0_PWMSEL:
-	case CY8C95X0_DIRECTION:
-	case CY8C95X0_DRV_PU:
-	case CY8C95X0_DRV_PD:
-	case CY8C95X0_DRV_ODH:
-	case CY8C95X0_DRV_ODL:
-	case CY8C95X0_DRV_PP_FAST:
-	case CY8C95X0_DRV_PP_SLOW:
-	case CY8C95X0_DRV_HIZ:
 		return true;
 	}
 
-- 
2.35.1