A variant may need to define some actions before and after
a voltage switch.
This patch adds 2 voltage switch callbacks in mmci_host_ops:
-pre_sig_volt_switch allows to prepare voltage switch before to
sent the SD_SWITCH_VOLTAGE command (cmd11).
-post_sig_volt_switch callback allows to define specific action after
regulator set voltage.
Signed-off-by: Ludovic Barre <ludovic.barre@xxxxxx>
---
drivers/mmc/host/mmci.c | 8 ++++++++
drivers/mmc/host/mmci.h | 2 ++
2 files changed, 10 insertions(+)
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index d0a041c9e6cd..24e630183ed4 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -22,6 +22,7 @@
#include <linux/mmc/pm.h>
#include <linux/mmc/host.h>
#include <linux/mmc/card.h>
+#include <linux/mmc/sd.h>
#include <linux/mmc/slot-gpio.h>
#include <linux/amba/bus.h>
#include <linux/clk.h>
@@ -1217,6 +1218,9 @@ mmci_start_command(struct mmci_host *host, struct mmc_command *cmd, u32 c)
writel_relaxed(clks, host->base + MMCIDATATIMER);
}
+ if (host->ops->pre_sig_volt_switch && cmd->opcode == SD_SWITCH_VOLTAGE)
+ host->ops->pre_sig_volt_switch(host);
+
if (/*interrupt*/0)
c |= MCI_CPSM_INTERRUPT;
@@ -1830,6 +1834,7 @@ static int mmci_get_cd(struct mmc_host *mmc)
static int mmci_sig_volt_switch(struct mmc_host *mmc, struct mmc_ios *ios)
{
+ struct mmci_host *host = mmc_priv(mmc);
int ret = 0;
if (!IS_ERR(mmc->supply.vqmmc)) {
@@ -1849,6 +1854,9 @@ static int mmci_sig_volt_switch(struct mmc_host *mmc, struct mmc_ios *ios)
break;
}
+ if (!ret && host->ops && host->ops->post_sig_volt_switch)
+ ret = host->ops->post_sig_volt_switch(host, ios);
+
if (ret)
dev_warn(mmc_dev(mmc), "Voltage switch failed\n");
}
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index ddcdfb827996..c3bc0a38d4cb 100644
--- a/drivers/mmc/host/mmci.h
+++ b/drivers/mmc/host/mmci.h
@@ -377,6 +377,8 @@ struct mmci_host_ops {
void (*set_clkreg)(struct mmci_host *host, unsigned int desired);
void (*set_pwrreg)(struct mmci_host *host, unsigned int pwr);
bool (*busy_complete)(struct mmci_host *host, u32 status, u32 err_msk);
+ void (*pre_sig_volt_switch)(struct mmci_host *host);
+ int (*post_sig_volt_switch)(struct mmci_host *host, struct mmc_ios *ios);
};
struct mmci_host {
--
2.17.1
