mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 02:39:48 +00:00
mmc: dw_mmc: Handle late vmmc regulators with EPROBE_DEFER
It is possible to specify a regulator that should be turned on when dw_mmc is probed. At the moment dw_mmc will fail to use the regulator properly if the regulator probes after dw_mmc. Fix this problem by honoring EPROBE_DEFER. At the same time move the regulator code out of the slot init code. We only specify one regulator for the whole device and other parts of the code (like suspend/resume) assume that the regulator has only been enabled once. Signed-off-by: Doug Anderson <dianders@chromium.org> Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
parent
0ddf03c95b
commit
870556a3df
2 changed files with 24 additions and 14 deletions
|
@ -55,6 +55,9 @@ Optional properties:
|
|||
|
||||
* broken-cd: as documented in mmc core bindings.
|
||||
|
||||
* vmmc-supply: The phandle to the regulator to use for vmmc. If this is
|
||||
specified we'll defer probe until we can find this regulator.
|
||||
|
||||
Aliases:
|
||||
|
||||
- All the MSHC controller nodes should be represented in the aliases node using
|
||||
|
@ -79,6 +82,7 @@ board specific portions as listed below.
|
|||
broken-cd;
|
||||
fifo-depth = <0x80>;
|
||||
card-detect-delay = <200>;
|
||||
vmmc-supply = <&buck8>;
|
||||
|
||||
slot@0 {
|
||||
reg = <0>;
|
||||
|
|
|
@ -1991,19 +1991,6 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id)
|
|||
#endif /* CONFIG_MMC_DW_IDMAC */
|
||||
}
|
||||
|
||||
host->vmmc = devm_regulator_get(mmc_dev(mmc), "vmmc");
|
||||
if (IS_ERR(host->vmmc)) {
|
||||
pr_info("%s: no vmmc regulator found\n", mmc_hostname(mmc));
|
||||
host->vmmc = NULL;
|
||||
} else {
|
||||
ret = regulator_enable(host->vmmc);
|
||||
if (ret) {
|
||||
dev_err(host->dev,
|
||||
"failed to enable regulator: %d\n", ret);
|
||||
goto err_setup_bus;
|
||||
}
|
||||
}
|
||||
|
||||
if (dw_mci_get_cd(mmc))
|
||||
set_bit(DW_MMC_CARD_PRESENT, &slot->flags);
|
||||
else
|
||||
|
@ -2235,11 +2222,29 @@ int dw_mci_probe(struct dw_mci *host)
|
|||
}
|
||||
}
|
||||
|
||||
host->vmmc = devm_regulator_get(host->dev, "vmmc");
|
||||
if (IS_ERR(host->vmmc)) {
|
||||
ret = PTR_ERR(host->vmmc);
|
||||
if (ret == -EPROBE_DEFER)
|
||||
goto err_clk_ciu;
|
||||
|
||||
dev_info(host->dev, "no vmmc regulator found: %d\n", ret);
|
||||
host->vmmc = NULL;
|
||||
} else {
|
||||
ret = regulator_enable(host->vmmc);
|
||||
if (ret) {
|
||||
if (ret != -EPROBE_DEFER)
|
||||
dev_err(host->dev,
|
||||
"regulator_enable fail: %d\n", ret);
|
||||
goto err_clk_ciu;
|
||||
}
|
||||
}
|
||||
|
||||
if (!host->bus_hz) {
|
||||
dev_err(host->dev,
|
||||
"Platform data must supply bus speed\n");
|
||||
ret = -ENODEV;
|
||||
goto err_clk_ciu;
|
||||
goto err_regulator;
|
||||
}
|
||||
|
||||
host->quirks = host->pdata->quirks;
|
||||
|
@ -2386,6 +2391,7 @@ int dw_mci_probe(struct dw_mci *host)
|
|||
if (host->use_dma && host->dma_ops->exit)
|
||||
host->dma_ops->exit(host);
|
||||
|
||||
err_regulator:
|
||||
if (host->vmmc)
|
||||
regulator_disable(host->vmmc);
|
||||
|
||||
|
|
Loading…
Reference in a new issue