memory: atmel-ebi: Enable the SMC clock if specified
Newer versions of the SMC block requires the SMC clock to be enabled
before the SMC logic can be used.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
diff --git a/drivers/memory/atmel-ebi.c b/drivers/memory/atmel-ebi.c
index 46657ea..4e83a8b 100644
--- a/drivers/memory/atmel-ebi.c
+++ b/drivers/memory/atmel-ebi.c
@@ -76,9 +76,11 @@
struct at91_ebi {
struct clk *clk;
- struct regmap *smc;
struct regmap *matrix;
-
+ struct {
+ struct regmap *regmap;
+ struct clk *clk;
+ } smc;
struct regmap_field *ebi_csa;
struct device *dev;
@@ -395,22 +397,26 @@
field.id_offset = AT91SAM9_SMC_GENERIC_BLK_SZ;
field.reg = AT91SAM9_SMC_SETUP(AT91SAM9_SMC_GENERIC);
- fields->setup = devm_regmap_field_alloc(ebi->dev, ebi->smc, field);
+ fields->setup = devm_regmap_field_alloc(ebi->dev, ebi->smc.regmap,
+ field);
if (IS_ERR(fields->setup))
return PTR_ERR(fields->setup);
field.reg = AT91SAM9_SMC_PULSE(AT91SAM9_SMC_GENERIC);
- fields->pulse = devm_regmap_field_alloc(ebi->dev, ebi->smc, field);
+ fields->pulse = devm_regmap_field_alloc(ebi->dev, ebi->smc.regmap,
+ field);
if (IS_ERR(fields->pulse))
return PTR_ERR(fields->pulse);
field.reg = AT91SAM9_SMC_CYCLE(AT91SAM9_SMC_GENERIC);
- fields->cycle = devm_regmap_field_alloc(ebi->dev, ebi->smc, field);
+ fields->cycle = devm_regmap_field_alloc(ebi->dev, ebi->smc.regmap,
+ field);
if (IS_ERR(fields->cycle))
return PTR_ERR(fields->cycle);
field.reg = AT91SAM9_SMC_MODE(AT91SAM9_SMC_GENERIC);
- fields->mode = devm_regmap_field_alloc(ebi->dev, ebi->smc, field);
+ fields->mode = devm_regmap_field_alloc(ebi->dev, ebi->smc.regmap,
+ field);
return PTR_ERR_OR_ZERO(fields->mode);
}
@@ -423,22 +429,26 @@
field.id_offset = SAMA5_SMC_GENERIC_BLK_SZ;
field.reg = AT91SAM9_SMC_SETUP(SAMA5_SMC_GENERIC);
- fields->setup = devm_regmap_field_alloc(ebi->dev, ebi->smc, field);
+ fields->setup = devm_regmap_field_alloc(ebi->dev, ebi->smc.regmap,
+ field);
if (IS_ERR(fields->setup))
return PTR_ERR(fields->setup);
field.reg = AT91SAM9_SMC_PULSE(SAMA5_SMC_GENERIC);
- fields->pulse = devm_regmap_field_alloc(ebi->dev, ebi->smc, field);
+ fields->pulse = devm_regmap_field_alloc(ebi->dev, ebi->smc.regmap,
+ field);
if (IS_ERR(fields->pulse))
return PTR_ERR(fields->pulse);
field.reg = AT91SAM9_SMC_CYCLE(SAMA5_SMC_GENERIC);
- fields->cycle = devm_regmap_field_alloc(ebi->dev, ebi->smc, field);
+ fields->cycle = devm_regmap_field_alloc(ebi->dev, ebi->smc.regmap,
+ field);
if (IS_ERR(fields->cycle))
return PTR_ERR(fields->cycle);
field.reg = SAMA5_SMC_MODE(SAMA5_SMC_GENERIC);
- fields->mode = devm_regmap_field_alloc(ebi->dev, ebi->smc, field);
+ fields->mode = devm_regmap_field_alloc(ebi->dev, ebi->smc.regmap,
+ field);
return PTR_ERR_OR_ZERO(fields->mode);
}
@@ -677,7 +687,7 @@
static int at91_ebi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
- struct device_node *child, *np = dev->of_node;
+ struct device_node *child, *np = dev->of_node, *smc_np;
const struct of_device_id *match;
struct at91_ebi *ebi;
int ret, reg_cells;
@@ -702,9 +712,22 @@
ebi->clk = clk;
- ebi->smc = syscon_regmap_lookup_by_phandle(np, "atmel,smc");
- if (IS_ERR(ebi->smc))
- return PTR_ERR(ebi->smc);
+ smc_np = of_parse_phandle(dev->of_node, "atmel,smc", 0);
+
+ ebi->smc.regmap = syscon_node_to_regmap(smc_np);
+ if (IS_ERR(ebi->smc.regmap))
+ return PTR_ERR(ebi->smc.regmap);
+
+ ebi->smc.clk = of_clk_get(smc_np, 0);
+ if (IS_ERR(ebi->smc.clk)) {
+ if (PTR_ERR(ebi->smc.clk) != -ENOENT)
+ return PTR_ERR(ebi->smc.clk);
+
+ ebi->smc.clk = NULL;
+ }
+ ret = clk_prepare_enable(ebi->smc.clk);
+ if (ret)
+ return ret;
/*
* The sama5d3 does not provide an EBICSA register and thus does need