Add a variant_data structure to handle the differences between the
various variants of this peripheral. Add a first quirk for a default
MCICLOCK value, required on the Ux500 variant where the enable bit needs
to be always set, since it controls access to some registers.
Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxxxxxx>
Signed-off-by: Rabin Vincent <rabin.vincent@xxxxxxxxxxxxxx>
---
drivers/mmc/host/mmci.c | 31 ++++++++++++++++++++++++++++++-
drivers/mmc/host/mmci.h | 2 ++
2 files changed, 32 insertions(+), 1 deletions(-)
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 63eb7f4..a1d1023 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -36,12 +36,30 @@
static unsigned int fmax = 515633;
+/**
+ * struct variant_data - MMCI variant-specific quirks
+ * @clkreg: default value for MCICLOCK register
+ */
+struct variant_data {
+ unsigned int clkreg;
+};
+
+static struct variant_data variant_arm = {
+};
+
+static struct variant_data variant_u300 = {
+};
+
+static struct variant_data variant_ux500 = {
+ .clkreg = MCI_CLK_ENABLE,
+};
/*
* This must be called with host->lock held
*/
static void mmci_set_clkreg(struct mmci_host *host, unsigned int desired)
{
- u32 clk = 0;
+ struct variant_data *variant = host->variant;
+ u32 clk = variant->clkreg;
if (desired) {
if (desired >= host->mclk) {
@@ -564,6 +582,7 @@ static const struct mmc_host_ops mmci_ops = {
static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
{
struct mmci_platform_data *plat = dev->dev.platform_data;
+ struct variant_data *variant = id->data;
struct mmci_host *host;
struct mmc_host *mmc;
int ret;
@@ -608,6 +627,7 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
goto clk_free;
host->plat = plat;
+ host->variant = variant;
host->mclk = clk_get_rate(host->clk);
/*
* According to the spec, mclk is max 100 MHz,
@@ -860,19 +880,28 @@ static struct amba_id mmci_ids[] = {
{
.id = 0x00041180,
.mask = 0x000fffff,
+ .data = &variant_arm,
},
{
.id = 0x00041181,
.mask = 0x000fffff,
+ .data = &variant_arm,
},
/* ST Micro variants */
{
.id = 0x00180180,
.mask = 0x00ffffff,
+ .data = &variant_u300,
},
{
.id = 0x00280180,
.mask = 0x00ffffff,
+ .data = &variant_u300,
+ },
+ {
+ .id = 0x00480180,
+ .mask = 0x00ffffff,
+ .data = &variant_ux500,
},
{ 0, 0 },
};
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index 516adc6..5e635e1 100644
--- a/drivers/mmc/host/mmci.h
+++ b/drivers/mmc/host/mmci.h
@@ -145,6 +145,7 @@
#define NR_SG 16
struct clk;
+struct variant_data;
struct mmci_host {
void __iomem *base;
@@ -165,6 +166,7 @@ struct mmci_host {
unsigned int cclk;
u32 pwr;
struct mmci_platform_data *plat;
+ struct variant_data *variant;
u8 hw_designer;
u8 hw_revision:4;
--
1.7.0
--
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