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72 lines
2.6 KiB
Diff
72 lines
2.6 KiB
Diff
From 0c734eb8a3a41ca9f9b452d0d1a7211de6c146dd Mon Sep 17 00:00:00 2001
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From: Andy Green <andy@openmoko.com>
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Date: Wed, 2 Jul 2008 22:42:07 +0100
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Subject: [PATCH] fix-pcf50633-really-defer-backlight-on-resume.patch
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Backlight wasn't off by default on resume, so it was never really
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deferred (until LCM is initialized). This fixes that and so removes
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the brief white screen between pcf50633 resume and LCM init.
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Signed-off-by: Andy Green <andy@openmoko.com>
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---
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drivers/i2c/chips/pcf50633.c | 23 +++++++++++++++++------
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1 files changed, 17 insertions(+), 6 deletions(-)
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diff --git a/drivers/i2c/chips/pcf50633.c b/drivers/i2c/chips/pcf50633.c
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index 120fdbc..875a5ee 100644
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--- a/drivers/i2c/chips/pcf50633.c
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+++ b/drivers/i2c/chips/pcf50633.c
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@@ -2481,13 +2481,14 @@ EXPORT_SYMBOL_GPL(pcf50633_ready);
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void pcf50633_backlight_resume(struct pcf50633_data *pcf)
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{
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+ dev_info(&pcf->client.dev, "pcf50633_backlight_resume\n");
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+
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/* we force the backlight on in fact */
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- __reg_write(pcf, PCF50633_REG_LEDOUT, pcf->standby_regs.misc[
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+ reg_write(pcf, PCF50633_REG_LEDDIM, 1);
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+ reg_write(pcf, PCF50633_REG_LEDOUT, pcf->standby_regs.misc[
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PCF50633_REG_LEDOUT - PCF50633_REG_AUTOOUT]);
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- __reg_write(pcf, PCF50633_REG_LEDENA, pcf->standby_regs.misc[
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+ reg_write(pcf, PCF50633_REG_LEDENA, pcf->standby_regs.misc[
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PCF50633_REG_LEDENA - PCF50633_REG_AUTOOUT] | 1);
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- __reg_write(pcf, PCF50633_REG_LEDDIM, pcf->standby_regs.misc[
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- PCF50633_REG_LEDDIM - PCF50633_REG_AUTOOUT]);
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}
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EXPORT_SYMBOL_GPL(pcf50633_backlight_resume);
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@@ -2498,6 +2499,7 @@ static int pcf50633_resume(struct device *dev)
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struct pcf50633_data *pcf = i2c_get_clientdata(client);
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int ret;
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u8 res[5];
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+ u8 misc[PCF50633_REG_LEDDIM - PCF50633_REG_AUTOOUT + 1];
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dev_info(dev, "pcf50633_resume suspended on entry = %d\n",
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(int)pcf->suspend_state);
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@@ -2509,11 +2511,20 @@ static int pcf50633_resume(struct device *dev)
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__reg_write(pcf, PCF50633_REG_OOCTIM2, pcf->standby_regs.ooctim2);
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+ memcpy(misc, pcf->standby_regs.misc, sizeof(pcf->standby_regs.misc));
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+
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+ if (pcf->pdata->defer_resume_backlight) {
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+ misc[PCF50633_REG_LEDOUT - PCF50633_REG_AUTOOUT] = 1;
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+ misc[PCF50633_REG_LEDENA - PCF50633_REG_AUTOOUT] = 0x20;
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+ misc[PCF50633_REG_LEDCTL - PCF50633_REG_AUTOOUT] = 1;
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+ misc[PCF50633_REG_LEDDIM - PCF50633_REG_AUTOOUT] = 1;
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+ }
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+
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/* regulator voltages and enable states */
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ret = i2c_smbus_write_i2c_block_data(&pcf->client,
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PCF50633_REG_AUTOOUT,
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- sizeof(pcf->standby_regs.misc) - 4,
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- &pcf->standby_regs.misc[0]);
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+ sizeof(misc),
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+ &misc[0]);
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if (ret)
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dev_err(dev, "Failed to restore misc :-( %d\n", ret);
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--
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1.5.6.5
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