diff options
| author | Tony Lindgren <tony@atomide.com> | 2019-10-17 15:34:34 +0200 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2019-10-19 00:09:54 +0200 |
| commit | c145649bf262a0614fbe5955bdffdfaba9023fce (patch) | |
| tree | f945097809868d9c191f443cb4181661d62de22a /arch/arm/mach-omap2/vc.c | |
| parent | ARM: OMAP2+: Configure voltage controller for retention (diff) | |
| download | linux-c145649bf262a0614fbe5955bdffdfaba9023fce.tar.xz linux-c145649bf262a0614fbe5955bdffdfaba9023fce.zip | |
ARM: OMAP2+: Configure voltage controller for cpcap to low-speed
Looks like the i2c timings in high-speed mode do not work properly to
allow us to clear I2C_DISABLE bits for PRM_VOLTCTRL register and the
device reboots if I2C_DISABLE bits are cleared.
Let's configure the voltage controller i2c for low-speed mode as done in
the Motorola Mapphone Android Linux kernel. This saves us about 7mW of
power during retention compared to the high-speed values.
Let's also change the low-speed warning to pr_info about relying on the
bootloader configured low-speed values like we currently do.
Cc: Merlijn Wajer <merlijn@wizzup.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/mach-omap2/vc.c')
| -rw-r--r-- | arch/arm/mach-omap2/vc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/mach-omap2/vc.c b/arch/arm/mach-omap2/vc.c index 888b8eecaf4d..86f1ac4c2412 100644 --- a/arch/arm/mach-omap2/vc.c +++ b/arch/arm/mach-omap2/vc.c @@ -670,7 +670,7 @@ static void __init omap4_vc_i2c_timing_init(struct voltagedomain *voltdm) const struct i2c_init_data *i2c_data; if (!voltdm->pmic->i2c_high_speed) { - pr_warn("%s: only high speed supported!\n", __func__); + pr_info("%s: using bootloader low-speed timings\n", __func__); return; } |