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authorLukas Wunner <lukas@wunner.de>2019-02-03 11:27:00 +0300
committerUlf Hansson <ulf.hansson@linaro.org>2019-02-25 10:40:58 +0300
commitc58ccf2b6de7d52994f9bb93227dfabf8077de24 (patch)
treedde415f6e1e29f1d00045b9877506d0fb4d3af4d /drivers/mmc
parente5c1e63c932379b89d7404d4e5fde1bf8abff951 (diff)
downloadlinux-c58ccf2b6de7d52994f9bb93227dfabf8077de24.tar.xz
mmc: bcm2835: Drop pointer to mmc_host from bcm2835_host
The BCM2835 MMC host driver uses a pointer to get from the private bcm2835_host structure to the generic mmc_host structure. However the latter is always immediately preceding the former in memory, so compute its address with a subtraction (which is cheaper than a dereference) and drop the superfluous pointer. No functional change intended. Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: Frank Pavlic <f.pavlic@kunbus.de> Cc: Alexander Graf <agraf@suse.de> Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/bcm2835.c20
1 files changed, 10 insertions, 10 deletions
diff --git a/drivers/mmc/host/bcm2835.c b/drivers/mmc/host/bcm2835.c
index ab8d58a60352..246c8ec24148 100644
--- a/drivers/mmc/host/bcm2835.c
+++ b/drivers/mmc/host/bcm2835.c
@@ -148,7 +148,6 @@ struct bcm2835_host {
void __iomem *ioaddr;
u32 phys_addr;
- struct mmc_host *mmc;
struct platform_device *pdev;
int clock; /* Current clock speed */
@@ -618,7 +617,7 @@ static void bcm2835_finish_request(struct bcm2835_host *host)
"failed to terminate DMA (%d)\n", err);
}
- mmc_request_done(host->mmc, mrq);
+ mmc_request_done(mmc_from_priv(host), mrq);
}
static
@@ -837,7 +836,7 @@ static void bcm2835_timeout(struct work_struct *work)
dev_err(dev, "timeout waiting for hardware interrupt.\n");
bcm2835_dumpregs(host);
- bcm2835_reset(host->mmc);
+ bcm2835_reset(mmc_from_priv(host));
if (host->data) {
host->data->error = -ETIMEDOUT;
@@ -1100,6 +1099,7 @@ static void bcm2835_dma_complete_work(struct work_struct *work)
static void bcm2835_set_clock(struct bcm2835_host *host, unsigned int clock)
{
+ struct mmc_host *mmc = mmc_from_priv(host);
int div;
/* The SDCDIV register has 11 bits, and holds (div - 2). But
@@ -1143,18 +1143,18 @@ static void bcm2835_set_clock(struct bcm2835_host *host, unsigned int clock)
div = SDCDIV_MAX_CDIV;
clock = host->max_clk / (div + 2);
- host->mmc->actual_clock = clock;
+ mmc->actual_clock = clock;
/* Calibrate some delays */
host->ns_per_fifo_word = (1000000000 / clock) *
- ((host->mmc->caps & MMC_CAP_4_BIT_DATA) ? 8 : 32);
+ ((mmc->caps & MMC_CAP_4_BIT_DATA) ? 8 : 32);
host->cdiv = div;
writel(host->cdiv, host->ioaddr + SDCDIV);
/* Set the timeout to 500ms */
- writel(host->mmc->actual_clock / 2, host->ioaddr + SDTOUT);
+ writel(mmc->actual_clock / 2, host->ioaddr + SDTOUT);
}
static void bcm2835_request(struct mmc_host *mmc, struct mmc_request *mrq)
@@ -1264,7 +1264,7 @@ static const struct mmc_host_ops bcm2835_ops = {
static int bcm2835_add_host(struct bcm2835_host *host)
{
- struct mmc_host *mmc = host->mmc;
+ struct mmc_host *mmc = mmc_from_priv(host);
struct device *dev = &host->pdev->dev;
char pio_limit_string[20];
int ret;
@@ -1370,7 +1370,6 @@ static int bcm2835_probe(struct platform_device *pdev)
mmc->ops = &bcm2835_ops;
host = mmc_priv(mmc);
- host->mmc = mmc;
host->pdev = pdev;
spin_lock_init(&host->lock);
@@ -1441,8 +1440,9 @@ err:
static int bcm2835_remove(struct platform_device *pdev)
{
struct bcm2835_host *host = platform_get_drvdata(pdev);
+ struct mmc_host *mmc = mmc_from_priv(host);
- mmc_remove_host(host->mmc);
+ mmc_remove_host(mmc);
writel(SDVDD_POWER_OFF, host->ioaddr + SDVDD);
@@ -1454,7 +1454,7 @@ static int bcm2835_remove(struct platform_device *pdev)
if (host->dma_chan_rxtx)
dma_release_channel(host->dma_chan_rxtx);
- mmc_free_host(host->mmc);
+ mmc_free_host(mmc);
platform_set_drvdata(pdev, NULL);
return 0;