| 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: <1255954260-29043-1-git-send-email-amit.kucheria@verdurent.com>
Date: Mon, 19 Oct 2009 15:11:00 +0300
From: Amit Kucheria <amit.kucheria@...durent.com>
To: List Linux Kernel <linux-kernel@...r.kernel.org>
Cc: sameo@...ux.intel.com, linux-omap@...r.kernel.org
Subject: [PATCH 4/5] mfd: twl4030-power: Add support for remapping power states
The <RESOURCE>_REMAP register allows configuration of the <RESOURCE> in case
of a sleep or off transition.
Allow this property of resources to be configured (through twl4030_resconfig)
and add code to parse these values to program the registers accordingly.
Signed-off-by: Amit Kucheria <amit.kucheria@...durent.com>
Cc: sameo@...ux.intel.com
Cc: linux-omap@...r.kernel.org
---
drivers/mfd/twl4030-power.c | 36 ++++++++++++++++++++++++++++++++++++
include/linux/i2c/twl4030.h | 3 +++
2 files changed, 39 insertions(+), 0 deletions(-)
diff --git a/drivers/mfd/twl4030-power.c b/drivers/mfd/twl4030-power.c
index 2c38ac1..3e41e0c 100644
--- a/drivers/mfd/twl4030-power.c
+++ b/drivers/mfd/twl4030-power.c
@@ -75,6 +75,8 @@ static u8 twl4030_start_script_address = 0x2b;
*/
#define DEV_GRP_OFFSET 0
#define TYPE_OFFSET 1
+#define REMAP_OFFSET 2
+#define DEDICATED_OFFSET 3
/* Bit positions in the registers */
@@ -88,6 +90,12 @@ static u8 twl4030_start_script_address = 0x2b;
#define TYPE2_SHIFT 3
#define TYPE2_MASK (3 << TYPE2_SHIFT)
+/* <RESOURCE>_REMAP */
+#define SLEEP_STATE_SHIFT 0
+#define SLEEP_STATE_MASK (0xf << SLEEP_STATE_SHIFT)
+#define OFF_STATE_SHIFT 4
+#define OFF_STATE_MASK (0xf << OFF_STATE_SHIFT)
+
static u8 res_config_addrs[] = {
[RES_VAUX1] = 0x17,
[RES_VAUX2] = 0x1b,
@@ -325,6 +333,7 @@ static int __init twl4030_configure_resource(struct twl4030_resconfig *rconfig)
int err;
u8 type;
u8 grp;
+ u8 remap;
if (rconfig->resource > TOTAL_RESOURCES) {
pr_err("TWL4030 Resource %d does not exist\n",
@@ -380,6 +389,33 @@ static int __init twl4030_configure_resource(struct twl4030_resconfig *rconfig)
return err;
}
+ /* Set remap states */
+ err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &remap,
+ rconfig_addr + REMAP_OFFSET);
+ if (err < 0) {
+ pr_err("TWL4030 Resource %d remap could not be read\n",
+ rconfig->resource);
+ return err;
+ }
+
+ if (rconfig->remap_off >= 0) {
+ remap &= ~OFF_STATE_MASK;
+ remap |= rconfig->remap_off << OFF_STATE_SHIFT;
+ }
+
+ if (rconfig->remap_sleep >= 0) {
+ remap &= ~SLEEP_STATE_MASK;
+ remap |= rconfig->remap_off << SLEEP_STATE_SHIFT;
+ }
+
+ err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
+ remap,
+ rconfig_addr + REMAP_OFFSET);
+ if (err < 0) {
+ pr_err("TWL4030 failed to program remap\n");
+ return err;
+ }
+
return 0;
}
diff --git a/include/linux/i2c/twl4030.h b/include/linux/i2c/twl4030.h
index 4bc2836..ef21575 100644
--- a/include/linux/i2c/twl4030.h
+++ b/include/linux/i2c/twl4030.h
@@ -326,6 +326,7 @@ struct twl4030_script {
#define RES_TYPE_ALL 0x7
+/* Resource states */
#define RES_STATE_WRST 0xF
#define RES_STATE_ACTIVE 0xE
#define RES_STATE_SLEEP 0x8
@@ -393,6 +394,8 @@ struct twl4030_resconfig {
u8 devgroup; /* Processor group that Power resource belongs to */
u8 type; /* Power resource addressed, 6 / broadcast message */
u8 type2; /* Power resource addressed, 3 / broadcast message */
+ u8 remap_off; /* off state remapping */
+ u8 remap_sleep; /* sleep state remapping */
};
struct twl4030_power_data {
--
1.6.3.3
--
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