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authorEric Miao <eric.miao@marvell.com>2008-09-03 18:06:34 +0800
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-09-26 23:43:20 +0100
commit5a3d96519040f9736b9f8089e2a1e33a81a6eafe (patch)
treebe92df6b14ba6c9e420bc45d13a76b812991bb0c /arch/arm/mach-pxa/pxa25x.c
parent4fa7c24e94b3f5bfb367bb847af3c3abd8cca3c0 (diff)
downloadlinux-5a3d96519040f9736b9f8089e2a1e33a81a6eafe.tar.bz2
[ARM] pxa: better MFP low power state support for pxa25x/pxa27x
When configured as a specific low power state: MFP_LPM_DRIVE_LOW, MFP_LPM_DRIVE_HIGH, the corresponding GPDR register bit during low power mode shall be re-configured as output (if they are not configured so), thus the PGSRx bits can output. Create an additional low power values GPDR registers, and properly save/restore the GAFR + GPDR registers when doing suspend/resume. Signed-off-by: Eric Miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-pxa/pxa25x.c')
-rw-r--r--arch/arm/mach-pxa/pxa25x.c28
1 files changed, 3 insertions, 25 deletions
diff --git a/arch/arm/mach-pxa/pxa25x.c b/arch/arm/mach-pxa/pxa25x.c
index 305452b56e91..f0eda2094494 100644
--- a/arch/arm/mach-pxa/pxa25x.c
+++ b/arch/arm/mach-pxa/pxa25x.c
@@ -203,33 +203,17 @@ static struct clk pxa25x_clks[] = {
* More ones like CP and general purpose register values are preserved
* with the stack pointer in sleep.S.
*/
-enum { SLEEP_SAVE_PGSR0, SLEEP_SAVE_PGSR1, SLEEP_SAVE_PGSR2,
-
- SLEEP_SAVE_GAFR0_L, SLEEP_SAVE_GAFR0_U,
- SLEEP_SAVE_GAFR1_L, SLEEP_SAVE_GAFR1_U,
- SLEEP_SAVE_GAFR2_L, SLEEP_SAVE_GAFR2_U,
-
+enum {
SLEEP_SAVE_PSTR,
-
SLEEP_SAVE_CKEN,
-
SLEEP_SAVE_COUNT
};
static void pxa25x_cpu_pm_save(unsigned long *sleep_save)
{
- SAVE(PGSR0); SAVE(PGSR1); SAVE(PGSR2);
-
- SAVE(GAFR0_L); SAVE(GAFR0_U);
- SAVE(GAFR1_L); SAVE(GAFR1_U);
- SAVE(GAFR2_L); SAVE(GAFR2_U);
-
SAVE(CKEN);
SAVE(PSTR);
-
- /* Clear GPIO transition detect bits */
- GEDR0 = GEDR0; GEDR1 = GEDR1; GEDR2 = GEDR2;
}
static void pxa25x_cpu_pm_restore(unsigned long *sleep_save)
@@ -237,14 +221,6 @@ static void pxa25x_cpu_pm_restore(unsigned long *sleep_save)
/* ensure not to come back here if it wasn't intended */
PSPR = 0;
- /* restore registers */
- RESTORE(GAFR0_L); RESTORE(GAFR0_U);
- RESTORE(GAFR1_L); RESTORE(GAFR1_U);
- RESTORE(GAFR2_L); RESTORE(GAFR2_U);
- RESTORE(PGSR0); RESTORE(PGSR1); RESTORE(PGSR2);
-
- PSSR = PSSR_RDH | PSSR_PH;
-
RESTORE(CKEN);
RESTORE(PSTR);
}
@@ -330,6 +306,8 @@ static struct sys_device pxa25x_sysdev[] = {
{
.cls = &pxa_irq_sysclass,
}, {
+ .cls = &pxa2xx_mfp_sysclass,
+ }, {
.cls = &pxa_gpio_sysclass,
},
};