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Diffstat (limited to 'extras/recipes-kernel/linux/linux-omap-2.6.39/mfd/0013-MFD-TWL4030-optimizing-resource-configuration.patch')
-rw-r--r--extras/recipes-kernel/linux/linux-omap-2.6.39/mfd/0013-MFD-TWL4030-optimizing-resource-configuration.patch184
1 files changed, 184 insertions, 0 deletions
diff --git a/extras/recipes-kernel/linux/linux-omap-2.6.39/mfd/0013-MFD-TWL4030-optimizing-resource-configuration.patch b/extras/recipes-kernel/linux/linux-omap-2.6.39/mfd/0013-MFD-TWL4030-optimizing-resource-configuration.patch
new file mode 100644
index 00000000..8904f8de
--- /dev/null
+++ b/extras/recipes-kernel/linux/linux-omap-2.6.39/mfd/0013-MFD-TWL4030-optimizing-resource-configuration.patch
@@ -0,0 +1,184 @@
1From bf171753a162d07753208c6bcfae8ca1e5c94af3 Mon Sep 17 00:00:00 2001
2From: Lesly A M <leslyam@ti.com>
3Date: Wed, 1 Jun 2011 14:57:05 -0700
4Subject: [PATCH 13/13] MFD: TWL4030: optimizing resource configuration
5
6Skip the i2c register writes in twl4030_configure_resource() if the new value
7is same as the old value, for devgrp/type/remap regs.
8
9Suggested by David Derrick <dderrick@ti.com>
10
11Signed-off-by: Lesly A M <leslyam@ti.com>
12Cc: Nishanth Menon <nm@ti.com>
13Cc: David Derrick <dderrick@ti.com>
14Cc: Samuel Ortiz <sameo@linux.intel.com>
15---
16 drivers/mfd/twl4030-power.c | 126 ++++++++++++++++++++++++------------------
17 1 files changed, 72 insertions(+), 54 deletions(-)
18
19diff --git a/drivers/mfd/twl4030-power.c b/drivers/mfd/twl4030-power.c
20index 8af3fe3..d82632f 100644
21--- a/drivers/mfd/twl4030-power.c
22+++ b/drivers/mfd/twl4030-power.c
23@@ -335,9 +335,9 @@ static int twl4030_configure_resource(struct twl4030_resconfig *rconfig)
24 {
25 int rconfig_addr;
26 int err;
27- u8 type;
28- u8 grp;
29- u8 remap;
30+ u8 type, type_value;
31+ u8 grp, grp_value;
32+ u8 remap, remap_value;
33
34 if (rconfig->resource > TOTAL_RESOURCES) {
35 pr_err("TWL4030 Resource %d does not exist\n",
36@@ -348,76 +348,94 @@ static int twl4030_configure_resource(struct twl4030_resconfig *rconfig)
37 rconfig_addr = res_config_addrs[rconfig->resource];
38
39 /* Set resource group */
40- err = twl_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &grp,
41+ if (rconfig->devgroup != TWL4030_RESCONFIG_UNDEF) {
42+ err = twl_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &grp,
43 rconfig_addr + DEV_GRP_OFFSET);
44- if (err) {
45- pr_err("TWL4030 Resource %d group could not be read\n",
46- rconfig->resource);
47- return err;
48- }
49+ if (err) {
50+ pr_err("TWL4030 Resource %d group could not be read\n",
51+ rconfig->resource);
52+ return err;
53+ }
54
55- if (rconfig->devgroup != TWL4030_RESCONFIG_UNDEF) {
56- grp &= ~DEV_GRP_MASK;
57- grp |= rconfig->devgroup << DEV_GRP_SHIFT;
58- err = twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
59+ grp_value = (grp & DEV_GRP_MASK) >> DEV_GRP_SHIFT;
60+
61+ if (rconfig->devgroup != grp_value) {
62+ grp &= ~DEV_GRP_MASK;
63+ grp |= rconfig->devgroup << DEV_GRP_SHIFT;
64+ err = twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
65 grp, rconfig_addr + DEV_GRP_OFFSET);
66- if (err < 0) {
67- pr_err("TWL4030 failed to program devgroup\n");
68- return err;
69+ if (err < 0) {
70+ pr_err("TWL4030 failed to program devgroup\n");
71+ return err;
72+ }
73 }
74 }
75
76 /* Set resource types */
77- err = twl_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &type,
78+ if ((rconfig->type != TWL4030_RESCONFIG_UNDEF) ||
79+ (rconfig->type2 != TWL4030_RESCONFIG_UNDEF)) {
80+
81+ err = twl_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &type,
82 rconfig_addr + TYPE_OFFSET);
83- if (err < 0) {
84- pr_err("TWL4030 Resource %d type could not be read\n",
85- rconfig->resource);
86- return err;
87- }
88+ if (err < 0) {
89+ pr_err("TWL4030 Resource %d type could not be read\n",
90+ rconfig->resource);
91+ return err;
92+ }
93
94- if (rconfig->type != TWL4030_RESCONFIG_UNDEF) {
95- type &= ~TYPE_MASK;
96- type |= rconfig->type << TYPE_SHIFT;
97- }
98+ type_value = type;
99
100- if (rconfig->type2 != TWL4030_RESCONFIG_UNDEF) {
101- type &= ~TYPE2_MASK;
102- type |= rconfig->type2 << TYPE2_SHIFT;
103- }
104+ if (rconfig->type != TWL4030_RESCONFIG_UNDEF) {
105+ type &= ~TYPE_MASK;
106+ type |= rconfig->type << TYPE_SHIFT;
107+ }
108
109- err = twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
110+ if (rconfig->type2 != TWL4030_RESCONFIG_UNDEF) {
111+ type &= ~TYPE2_MASK;
112+ type |= rconfig->type2 << TYPE2_SHIFT;
113+ }
114+
115+ if (type != type_value) {
116+ err = twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
117 type, rconfig_addr + TYPE_OFFSET);
118- if (err < 0) {
119- pr_err("TWL4030 failed to program resource type\n");
120- return err;
121+ if (err < 0) {
122+ pr_err("TWL4030 failed to program resource type\n");
123+ return err;
124+ }
125+ }
126 }
127
128 /* Set remap states */
129- err = twl_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &remap,
130+ if ((rconfig->remap_off != TWL4030_RESCONFIG_UNDEF) ||
131+ (rconfig->remap_sleep != TWL4030_RESCONFIG_UNDEF)) {
132+ err = twl_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &remap,
133 rconfig_addr + REMAP_OFFSET);
134- if (err < 0) {
135- pr_err("TWL4030 Resource %d remap could not be read\n",
136- rconfig->resource);
137- return err;
138- }
139+ if (err < 0) {
140+ pr_err("TWL4030 Resource %d remap could not be read\n",
141+ rconfig->resource);
142+ return err;
143+ }
144
145- if (rconfig->remap_off != TWL4030_RESCONFIG_UNDEF) {
146- remap &= ~OFF_STATE_MASK;
147- remap |= rconfig->remap_off << OFF_STATE_SHIFT;
148- }
149+ remap_value = remap;
150
151- if (rconfig->remap_sleep != TWL4030_RESCONFIG_UNDEF) {
152- remap &= ~SLEEP_STATE_MASK;
153- remap |= rconfig->remap_sleep << SLEEP_STATE_SHIFT;
154- }
155+ if (rconfig->remap_off != TWL4030_RESCONFIG_UNDEF) {
156+ remap &= ~OFF_STATE_MASK;
157+ remap |= rconfig->remap_off << OFF_STATE_SHIFT;
158+ }
159
160- err = twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
161- remap,
162- rconfig_addr + REMAP_OFFSET);
163- if (err < 0) {
164- pr_err("TWL4030 failed to program remap\n");
165- return err;
166+ if (rconfig->remap_sleep != TWL4030_RESCONFIG_UNDEF) {
167+ remap &= ~SLEEP_STATE_MASK;
168+ remap |= rconfig->remap_sleep << SLEEP_STATE_SHIFT;
169+ }
170+
171+ if (remap != remap_value) {
172+ err = twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
173+ remap, rconfig_addr + REMAP_OFFSET);
174+ if (err < 0) {
175+ pr_err("TWL4030 failed to program remap\n");
176+ return err;
177+ }
178+ }
179 }
180
181 return 0;
182--
1831.6.6.1
184
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