From: Hiromitsu Yamasaki <[email protected]>
Signed-off-by: Hiromitsu Yamasaki <[email protected]>
Signed-off-by: Dirk Behme <[email protected]>
---
drivers/spi/spi-sh-msiof.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c
index a960e8da123d..2c53fc3f73af 100644
--- a/drivers/spi/spi-sh-msiof.c
+++ b/drivers/spi/spi-sh-msiof.c
@@ -188,6 +188,14 @@ struct sh_msiof_spi_priv {
#define IER_RFOVFE 0x00000008 /* Receive FIFO Overflow Enable */
+static int msiof_rcar_is_gen3(struct device *dev)
+{
+ struct device_node *node = dev->of_node;
+
+ return of_device_is_compatible(node, "renesas,msiof-r8a7795") ||
+ of_device_is_compatible(node, "renesas,msiof-r8a7796");
+}
+
static u32 sh_msiof_read(struct sh_msiof_spi_priv *p, int reg_offs)
{
switch (reg_offs) {
@@ -1252,6 +1260,8 @@ static int sh_msiof_spi_probe(struct platform_device
*pdev)
const struct of_device_id *of_id;
struct sh_msiof_spi_info *info;
struct sh_msiof_spi_priv *p;
+ struct clk *ref_clk;
+ u32 clk_rate = 0;
int i;
int ret;
@@ -1352,6 +1362,17 @@ static int sh_msiof_spi_probe(struct platform_device
*pdev)
goto err2;
}
+ if (msiof_rcar_is_gen3(&master->dev)) {
+ ref_clk = devm_clk_get(&pdev->dev, "msiof_ref_clk");
+ if (!IS_ERR(ref_clk))
+ clk_rate = clk_get_rate(ref_clk);
+ if (clk_rate) {
+ clk_prepare_enable(p->clk);
+ clk_set_rate(p->clk, clk_rate);
+ clk_disable_unprepare(p->clk);
+ }
+ }
+
return 0;
err2:
--
2.14.1
