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mmc: sdhci-acpi: Let devices define their own private data

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Let devices define their own private data to facilitate device-specific
operations. The size of the private structure is specified in the
sdhci_acpi_slot structure, then sdhci_acpi_probe() will allocate extra
space for it, and sdhci_acpi_priv() can be used to get a reference to it.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Adrian Hunter 2017-10-19 13:41:45 +03:00 committed by Ulf Hansson
parent 6b10c9abfb
commit f07b7952df
1 changed files with 14 additions and 2 deletions
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16
drivers/mmc/host/sdhci-acpi.c
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@ -73,6 +73,7 @@ struct sdhci_acpi_slot {
unsigned int caps2;
mmc_pm_flag_t pm_caps;
unsigned int flags;
size_t priv_size;
int (*probe_slot)(struct platform_device *, const char *, const char *);
int (*remove_slot)(struct platform_device *);
};
@ -82,8 +83,14 @@ struct sdhci_acpi_host {
const struct sdhci_acpi_slot *slot;
struct platform_device *pdev;
bool use_runtime_pm;
unsigned long private[0] ____cacheline_aligned;
};
static inline void *sdhci_acpi_priv(struct sdhci_acpi_host *c)
{
return (void *)c->private;
}
static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag)
{
return c->slot && (c->slot->flags & flag);
@ -393,11 +400,13 @@ static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(const char *hid,
static int sdhci_acpi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
const struct sdhci_acpi_slot *slot;
struct acpi_device *device, *child;
struct sdhci_acpi_host *c;
struct sdhci_host *host;
struct resource *iomem;
resource_size_t len;
size_t priv_size;
const char *hid;
const char *uid;
int err;
@ -409,6 +418,8 @@ static int sdhci_acpi_probe(struct platform_device *pdev)
hid = acpi_device_hid(device);
uid = acpi_device_uid(device);
slot = sdhci_acpi_get_slot(hid, uid);
/* Power on the SDHCI controller and its children */
acpi_device_fix_up_power(device);
if (!sdhci_acpi_no_fixup_child_power(hid, uid)) {
@ -431,13 +442,14 @@ static int sdhci_acpi_probe(struct platform_device *pdev)
if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
return -ENOMEM;
host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host));
priv_size = slot ? slot->priv_size : 0;
host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host) + priv_size);
if (IS_ERR(host))
return PTR_ERR(host);
c = sdhci_priv(host);
c->host = host;
c->slot = sdhci_acpi_get_slot(hid, uid);
c->slot = slot;
c->pdev = pdev;
c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM);