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Diffstat (limited to 'target/linux/s3c24xx/patches/0159-fix-pcf50633-suspend-resume-onehit-i2c-other-meddlin.patch')
-rwxr-xr-xtarget/linux/s3c24xx/patches/0159-fix-pcf50633-suspend-resume-onehit-i2c-other-meddlin.patch204
1 files changed, 204 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/patches/0159-fix-pcf50633-suspend-resume-onehit-i2c-other-meddlin.patch b/target/linux/s3c24xx/patches/0159-fix-pcf50633-suspend-resume-onehit-i2c-other-meddlin.patch
new file mode 100755
index 0000000..e7fc674
--- /dev/null
+++ b/target/linux/s3c24xx/patches/0159-fix-pcf50633-suspend-resume-onehit-i2c-other-meddlin.patch
@@ -0,0 +1,204 @@
+From 286581f7a1cd2536b70cc0cfbc742ee45260252e Mon Sep 17 00:00:00 2001
+From: Andy Green <andy@openmoko.com>
+Date: Fri, 25 Jul 2008 23:06:12 +0100
+Subject: [PATCH] fix-pcf50633-suspend-resume-onehit-i2c-other-meddling.patch
+
+ - speed up suspend and resume by using one hit i2c bulk transactions
+ - don't bother storing int mask set on suspend, the default one is
+ what we use anyway
+ - put stack_trace() on pcf50633 low level access that fire if we
+ try to touch them before we resumed
+ - cosmetic source cleanup
+ - reduces resume time for pcf50633 from 450ms to 255ms
+
+Signed-off-by: Andy Green <andy@openmoko.com>
+---
+ arch/arm/mach-s3c2440/mach-gta02.c | 21 ++-------
+ drivers/i2c/chips/pcf50633.c | 83 +++++++++++++++++++----------------
+ 2 files changed, 49 insertions(+), 55 deletions(-)
+
+diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
+index 9ba1036..22de181 100644
+--- a/arch/arm/mach-s3c2440/mach-gta02.c
++++ b/arch/arm/mach-s3c2440/mach-gta02.c
+@@ -477,24 +477,11 @@ static struct pcf50633_platform_data gta02_pcf_pdata = {
+ .r_fix_batt_par = 10000,
+ .r_sense_milli = 220,
+ .resumers = {
+- [0] = /* PCF50633_INT1_ADPINS | */
+- /* PCF50633_INT1_ADPREM | */
+- PCF50633_INT1_USBINS |
+- PCF50633_INT1_USBREM |
+- PCF50633_INT1_ALARM,
++ [0] = PCF50633_INT1_USBINS |
++ PCF50633_INT1_USBREM |
++ PCF50633_INT1_ALARM,
+ [1] = PCF50633_INT2_ONKEYF,
+- [2] = /* PCF50633_INT3_BATFULL | */
+- /* PCF50633_INT3_CHGHALT | */
+- /* PCF50633_INT3_THLIMON | */
+- /* PCF50633_INT3_THLIMOFF | */
+- /* PCF50633_INT3_USBLIMON | */
+- /* PCF50633_INT3_USBLIMOFF | */
+- PCF50633_INT3_ONKEY1S ,
+- [3] = 0 /* |
+- PCF50633_INT4_LOWSYS | */
+- /* PCF50633_INT4_LOWBAT | */
+- /* PCF50633_INT4_HIGHTMP */,
+- [4] = 0
++ [2] = PCF50633_INT3_ONKEY1S
+ },
+ .rails = {
+ [PCF50633_REGULATOR_AUTO] = {
+diff --git a/drivers/i2c/chips/pcf50633.c b/drivers/i2c/chips/pcf50633.c
+index f6886d7..c148ea7 100644
+--- a/drivers/i2c/chips/pcf50633.c
++++ b/drivers/i2c/chips/pcf50633.c
+@@ -163,10 +163,7 @@ struct pcf50633_data {
+ u_int8_t down2out, down2ena;
+ u_int8_t memldoout, memldoena;
+ u_int8_t ledout, ledena, leddim;
+- struct {
+- u_int8_t out;
+- u_int8_t ena;
+- } ldo[__NUM_PCF50633_REGS];
++ u_int8_t ldo[__NUM_PCF50633_REGS][2];
+ } standby_regs;
+
+ struct resume_dependency resume_dependency;
+@@ -187,6 +184,10 @@ static struct platform_device *pcf50633_pdev;
+
+ static int __reg_write(struct pcf50633_data *pcf, u_int8_t reg, u_int8_t val)
+ {
++ if (pcf->have_been_suspended == 1) {
++ dev_err(&pcf->client.dev, "__reg_write while suspended\n");
++ dump_stack();
++ }
+ return i2c_smbus_write_byte_data(&pcf->client, reg, val);
+ }
+
+@@ -205,6 +206,10 @@ static int32_t __reg_read(struct pcf50633_data *pcf, u_int8_t reg)
+ {
+ int32_t ret;
+
++ if (pcf->have_been_suspended == 1) {
++ dev_err(&pcf->client.dev, "__reg_read while suspended\n");
++ dump_stack();
++ }
+ ret = i2c_smbus_read_byte_data(&pcf->client, reg);
+
+ return ret;
+@@ -2155,6 +2160,13 @@ static int pcf50633_suspend(struct device *dev, pm_message_t state)
+ struct i2c_client *client = to_i2c_client(dev);
+ struct pcf50633_data *pcf = i2c_get_clientdata(client);
+ int i;
++ int ret;
++ u_int8_t tmp;
++
++ /* we suspend once (!) as late as possible in the suspend sequencing */
++
++ if ((state.event != PM_EVENT_SUSPEND) || (pcf->have_been_suspended))
++ return 0;
+
+ /* The general idea is to power down all unused power supplies,
+ * and then mask all PCF50606 interrup sources but EXTONR, ONKEYF
+@@ -2176,25 +2188,25 @@ static int pcf50633_suspend(struct device *dev, pm_message_t state)
+ pcf->standby_regs.ledout = __reg_read(pcf, PCF50633_REG_LEDOUT);
+ pcf->standby_regs.ledena = __reg_read(pcf, PCF50633_REG_LEDENA);
+ pcf->standby_regs.leddim = __reg_read(pcf, PCF50633_REG_LEDDIM);
+- /* FIXME: one big read? */
+- for (i = 0; i < 7; i++) {
+- u_int8_t reg_out = PCF50633_REG_LDO1OUT + 2*i;
+- pcf->standby_regs.ldo[i].out = __reg_read(pcf, reg_out);
+- pcf->standby_regs.ldo[i].ena = __reg_read(pcf, reg_out+1);
+- }
++
++ /* regulator voltages and enable states */
++ ret = i2c_smbus_read_i2c_block_data(&pcf->client,
++ PCF50633_REG_LDO1OUT, 14,
++ &pcf->standby_regs.ldo[0][0]);
++ if (ret != 14)
++ dev_err(dev, "Failed to save LDO levels and enables :-(\n");
+
+ /* switch off power supplies that are not needed during suspend */
+ for (i = 0; i < __NUM_PCF50633_REGULATORS; i++) {
+- if (!(pcf->pdata->rails[i].flags & PMU_VRAIL_F_SUSPEND_ON)) {
+- u_int8_t tmp;
+-
+- DEBUGP("disabling pcf50633 regulator %u\n", i);
+- /* we cannot use pcf50633_onoff_set() because we're
+- * already under the mutex */
+- tmp = __reg_read(pcf, regulator_registers[i]+1);
+- tmp &= 0xfe;
+- __reg_write(pcf, regulator_registers[i]+1, tmp);
+- }
++ if ((pcf->pdata->rails[i].flags & PMU_VRAIL_F_SUSPEND_ON))
++ continue;
++
++ dev_dbg(dev, "disabling regulator %u\n", i);
++ /* we cannot use pcf50633_onoff_set() because we're
++ * already under the mutex */
++ tmp = __reg_read(pcf, regulator_registers[i]+1);
++ tmp &= 0xfe;
++ __reg_write(pcf, regulator_registers[i]+1, tmp);
+ }
+
+ /* turn off the backlight */
+@@ -2202,11 +2214,9 @@ static int pcf50633_suspend(struct device *dev, pm_message_t state)
+ __reg_write(pcf, PCF50633_REG_LEDOUT, 2);
+ __reg_write(pcf, PCF50633_REG_LEDENA, 0x00);
+
+- pcf->standby_regs.int1m = __reg_read(pcf, PCF50633_REG_INT1M);
+- pcf->standby_regs.int2m = __reg_read(pcf, PCF50633_REG_INT2M);
+- pcf->standby_regs.int3m = __reg_read(pcf, PCF50633_REG_INT3M);
+- pcf->standby_regs.int4m = __reg_read(pcf, PCF50633_REG_INT4M);
+- pcf->standby_regs.int5m = __reg_read(pcf, PCF50633_REG_INT5M);
++ /* set interrupt masks so only those sources we want to wake
++ * us are able to
++ */
+ __reg_write(pcf, PCF50633_REG_INT1M, ~pcf->pdata->resumers[0]);
+ __reg_write(pcf, PCF50633_REG_INT2M, ~pcf->pdata->resumers[1]);
+ __reg_write(pcf, PCF50633_REG_INT3M, ~pcf->pdata->resumers[2]);
+@@ -2240,16 +2250,13 @@ static int pcf50633_resume(struct device *dev)
+ {
+ struct i2c_client *client = to_i2c_client(dev);
+ struct pcf50633_data *pcf = i2c_get_clientdata(client);
+- int i;
++ int ret;
+
+ mutex_lock(&pcf->lock);
+
+- /* Resume all saved registers that don't "survive" standby state */
+- __reg_write(pcf, PCF50633_REG_INT1M, pcf->standby_regs.int1m);
+- __reg_write(pcf, PCF50633_REG_INT2M, pcf->standby_regs.int2m);
+- __reg_write(pcf, PCF50633_REG_INT3M, pcf->standby_regs.int3m);
+- __reg_write(pcf, PCF50633_REG_INT4M, pcf->standby_regs.int4m);
+- __reg_write(pcf, PCF50633_REG_INT5M, pcf->standby_regs.int5m);
++ pcf->have_been_suspended = 2; /* resuming */
++
++ /* these guys get reset while pcf50633 is suspend state, refresh */
+
+ __reg_write(pcf, PCF50633_REG_OOCTIM2, pcf->standby_regs.ooctim2);
+ __reg_write(pcf, PCF50633_REG_AUTOOUT, pcf->standby_regs.autoout);
+@@ -2265,12 +2272,12 @@ static int pcf50633_resume(struct device *dev)
+ if (!pcf->pdata->defer_resume_backlight)
+ pcf50633_backlight_resume(pcf);
+
+- /* FIXME: one big read? */
+- for (i = 0; i < 7; i++) {
+- u_int8_t reg_out = PCF50633_REG_LDO1OUT + 2*i;
+- __reg_write(pcf, reg_out, pcf->standby_regs.ldo[i].out);
+- __reg_write(pcf, reg_out+1, pcf->standby_regs.ldo[i].ena);
+- }
++ /* regulator voltages and enable states */
++ ret = i2c_smbus_write_i2c_block_data(&pcf->client,
++ PCF50633_REG_LDO1OUT, 14,
++ &pcf->standby_regs.ldo[0][0]);
++ if (ret)
++ dev_err(dev, "Failed to restore LDOs :-( %d\n", ret);
+
+ mutex_unlock(&pcf->lock);
+
+--
+1.5.6.3
+
generated by cgit v1.1 at 2024-12-04 17:14:36 +0000