GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-28 09:31:14 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

mfd: ab8500-sysctrl: Handle probe deferral

Browse source 
In the current boot, clients making use of the AB8500 sysctrl
may be probed before the ab8500-sysctrl driver. This gives them
-EINVAL, but should rather give -EPROBE_DEFER.

Before this, the abx500 clock driver didn't probe properly,
and as a result the codec driver in turn using the clocks did
not probe properly. After this patch, everything probes
properly.

Also add OF compatible-string probing. This driver is all
device tree, so let's just make a drive-by-fix of that as
well.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Linus Walleij 2017-01-13 10:53:55 +01:00 • committed by Lee Jones
parent f80e78aa11
commit 7e9c40c639
1 changed files with 11 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

14
drivers/mfd/ab8500-sysctrl.c
View file

@ -101,7 +101,7 @@ int ab8500_sysctrl_read(u16 reg, u8 *value)
u8 bank; u8 bank;
if (sysctrl_dev == NULL) if (sysctrl_dev == NULL)
return -EINVAL; return -EPROBE_DEFER;
bank = (reg >> 8); bank = (reg >> 8);
if (!valid_bank(bank)) if (!valid_bank(bank))
@ -117,11 +117,13 @@ int ab8500_sysctrl_write(u16 reg, u8 mask, u8 value)
u8 bank; u8 bank;
if (sysctrl_dev == NULL) if (sysctrl_dev == NULL)
return -EINVAL; return -EPROBE_DEFER;
bank = (reg >> 8); bank = (reg >> 8);
if (!valid_bank(bank)) if (!valid_bank(bank)) {
pr_err("invalid bank\n");
return -EINVAL; return -EINVAL;
}
return abx500_mask_and_set_register_interruptible(sysctrl_dev, bank, return abx500_mask_and_set_register_interruptible(sysctrl_dev, bank,
(u8)(reg & 0xFF), mask, value); (u8)(reg & 0xFF), mask, value);
@ -148,9 +150,15 @@ static int ab8500_sysctrl_remove(struct platform_device *pdev)
return 0; return 0;
} }
static const struct of_device_id ab8500_sysctrl_match[] = {
{ .compatible = "stericsson,ab8500-sysctrl", },
{}
};
static struct platform_driver ab8500_sysctrl_driver = { static struct platform_driver ab8500_sysctrl_driver = {
.driver = { .driver = {
.name = "ab8500-sysctrl", .name = "ab8500-sysctrl",
.of_match_table = ab8500_sysctrl_match,
}, },
.probe = ab8500_sysctrl_probe, .probe = ab8500_sysctrl_probe,
.remove = ab8500_sysctrl_remove, .remove = ab8500_sysctrl_remove,