diff options
-rw-r--r-- | arch/arm/mach-omap2/pm44xx.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/arch/arm/mach-omap2/pm44xx.c b/arch/arm/mach-omap2/pm44xx.c index aa6fd98f606e..ea62e75ef21d 100644 --- a/arch/arm/mach-omap2/pm44xx.c +++ b/arch/arm/mach-omap2/pm44xx.c | |||
@@ -77,10 +77,20 @@ static int omap4_pm_suspend(void) | |||
77 | omap_set_pwrdm_state(pwrst->pwrdm, pwrst->saved_state); | 77 | omap_set_pwrdm_state(pwrst->pwrdm, pwrst->saved_state); |
78 | pwrdm_set_logic_retst(pwrst->pwrdm, pwrst->saved_logic_state); | 78 | pwrdm_set_logic_retst(pwrst->pwrdm, pwrst->saved_logic_state); |
79 | } | 79 | } |
80 | if (ret) | 80 | if (ret) { |
81 | pr_crit("Could not enter target state in pm_suspend\n"); | 81 | pr_crit("Could not enter target state in pm_suspend\n"); |
82 | else | 82 | /* |
83 | * OMAP4 chip PM currently works only with certain (newer) | ||
84 | * versions of bootloaders. This is due to missing code in the | ||
85 | * kernel to properly reset and initialize some devices. | ||
86 | * Warn the user about the bootloader version being one of the | ||
87 | * possible causes. | ||
88 | * http://www.spinics.net/lists/arm-kernel/msg218641.html | ||
89 | */ | ||
90 | pr_warn("A possible cause could be an old bootloader - try u-boot >= v2012.07\n"); | ||
91 | } else { | ||
83 | pr_info("Successfully put all powerdomains to target state\n"); | 92 | pr_info("Successfully put all powerdomains to target state\n"); |
93 | } | ||
84 | 94 | ||
85 | return 0; | 95 | return 0; |
86 | } | 96 | } |
@@ -146,6 +156,13 @@ int __init omap4_pm_init(void) | |||
146 | } | 156 | } |
147 | 157 | ||
148 | pr_err("Power Management for TI OMAP4.\n"); | 158 | pr_err("Power Management for TI OMAP4.\n"); |
159 | /* | ||
160 | * OMAP4 chip PM currently works only with certain (newer) | ||
161 | * versions of bootloaders. This is due to missing code in the | ||
162 | * kernel to properly reset and initialize some devices. | ||
163 | * http://www.spinics.net/lists/arm-kernel/msg218641.html | ||
164 | */ | ||
165 | pr_warn("OMAP4 PM: u-boot >= v2012.07 is required for full PM support\n"); | ||
149 | 166 | ||
150 | ret = pwrdm_for_each(pwrdms_setup, NULL); | 167 | ret = pwrdm_for_each(pwrdms_setup, NULL); |
151 | if (ret) { | 168 | if (ret) { |