lkml.org 
[lkml]   [2020]   [Jan]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 7/9] mmc: mmci: add volt_switch callbacks
Date
This patch adds 2 voltage switch callbacks in mmci_host_ops:
-prep_volt_switch allows to prepare voltage switch before to
sent the SD_SWITCH_VOLTAGE command (cmd11).
-volt_switch callback allows to define specific action after
regulator set voltage.

Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
---
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 00b473f57047..d76a59c06cb0 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>
@@ -1207,6 +1208,9 @@ mmci_start_command(struct mmci_host *host, struct mmc_command *cmd, u32 c)
writel_relaxed(clks, host->base + MMCIDATATIMER);
}

+ if (host->ops->prep_volt_switch && cmd->opcode == SD_SWITCH_VOLTAGE)
+ host->ops->prep_volt_switch(host);
+
if (/*interrupt*/0)
c |= MCI_CPSM_INTERRUPT;

@@ -1820,6 +1824,7 @@ 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)) {
@@ -1839,6 +1844,9 @@ static int mmci_sig_volt_switch(struct mmc_host *mmc, struct mmc_ios *ios)
break;
}

+ if (!ret && host->ops && host->ops->volt_switch)
+ ret = host->ops->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..c04a144259a2 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 (*prep_volt_switch)(struct mmci_host *host);
+ int (*volt_switch)(struct mmci_host *host, struct mmc_ios *ios);
};

struct mmci_host {
--
2.17.1
\
 
 \ /
  Last update: 2020-01-10 14:50    [W:0.097 / U:12.772 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site