[PATCH 1/2] mmc: omap_hsmmc: Fix context save and restore for DT
Tony Lindgren
tony at atomide.com
Wed Sep 25 19:47:37 EDT 2013
We want to get rid of the omap specific platform init code
callbacks as they don't play nice with device tree.
Let's convert the context loss check to be based on a
register state detection instead.
Cc: Andreas Fenkart <afenkart at gmail.com>
Cc: Balaji T K <balajitk at ti.com>
Signed-off-by: Tony Lindgren <tony at atomide.com>
---
drivers/mmc/host/omap_hsmmc.c | 41 ++++++++---------------------------------
1 file changed, 8 insertions(+), 33 deletions(-)
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 6ac63df..aa97497 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -171,19 +171,19 @@ struct omap_hsmmc_host {
unsigned char bus_mode;
unsigned char power_mode;
int suspended;
+ u32 hctl;
+ u32 capa;
int irq;
int use_dma, dma_ch;
struct dma_chan *tx_chan;
struct dma_chan *rx_chan;
int slot_id;
int response_busy;
- int context_loss;
int protect_card;
int reqs_blocked;
int use_reg;
int req_in_progress;
struct omap_hsmmc_next next_data;
-
struct omap_mmc_platform_data *pdata;
};
@@ -597,25 +597,16 @@ static void omap_hsmmc_set_bus_mode(struct omap_hsmmc_host *host)
static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host)
{
struct mmc_ios *ios = &host->mmc->ios;
- struct omap_mmc_platform_data *pdata = host->pdata;
- int context_loss = 0;
u32 hctl, capa;
unsigned long timeout;
- if (pdata->get_context_loss_count) {
- context_loss = pdata->get_context_loss_count(host->dev);
- if (context_loss < 0)
- return 1;
- }
-
- dev_dbg(mmc_dev(host->mmc), "context was %slost\n",
- context_loss == host->context_loss ? "not " : "");
- if (host->context_loss == context_loss)
- return 1;
-
if (!OMAP_HSMMC_READ(host->base, SYSSTATUS) & RESETDONE)
return 1;
+ if (host->hctl == OMAP_HSMMC_READ(host->base, HCTL) &&
+ host->capa == OMAP_HSMMC_READ(host->base, CAPA))
+ return 0;
+
if (host->pdata->controller_flags & OMAP_HSMMC_SUPPORTS_DUAL_VOLT) {
if (host->power_mode != MMC_POWER_OFF &&
(1 << ios->vdd) <= MMC_VDD_23_24)
@@ -655,8 +646,6 @@ static int omap_hsmmc_context_restore(struct omap_hsmmc_host *host)
omap_hsmmc_set_bus_mode(host);
out:
- host->context_loss = context_loss;
-
dev_dbg(mmc_dev(host->mmc), "context is restored\n");
return 0;
}
@@ -666,15 +655,8 @@ out:
*/
static void omap_hsmmc_context_save(struct omap_hsmmc_host *host)
{
- struct omap_mmc_platform_data *pdata = host->pdata;
- int context_loss;
-
- if (pdata->get_context_loss_count) {
- context_loss = pdata->get_context_loss_count(host->dev);
- if (context_loss < 0)
- return;
- host->context_loss = context_loss;
- }
+ host->hctl = OMAP_HSMMC_READ(host->base, HCTL);
+ host->capa = OMAP_HSMMC_READ(host->base, CAPA);
}
#else
@@ -1635,13 +1617,6 @@ static int omap_hsmmc_regs_show(struct seq_file *s, void *data)
{
struct mmc_host *mmc = s->private;
struct omap_hsmmc_host *host = mmc_priv(mmc);
- int context_loss = 0;
-
- if (host->pdata->get_context_loss_count)
- context_loss = host->pdata->get_context_loss_count(host->dev);
-
- seq_printf(s, "mmc%d:\n ctx_loss:\t%d:%d\n\nregs:\n",
- mmc->index, host->context_loss, context_loss);
if (host->suspended) {
seq_printf(s, "host suspended, can't read registers\n");
More information about the linux-arm-kernel
mailing list