[PATCH v2] mtd: rawnand: meson: initialize clock register

[Arseniy Krasnov]

Clock register must be also initialized during controller probing. If
this is not performed (for example by bootloader before) - controller
will not work.

Signed-off-by: Arseniy Krasnov <avkrasnov at salutedevices.com>
---
 Changelog:
 v1 -> v2:
  * Change 'CLK_ENABLE_VALUE' -> 'CLK_SELECT_FIX_PLL2': '0x245' -> 'BIT(6)'
    according doc.

 drivers/mtd/nand/raw/meson_nand.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/mtd/nand/raw/meson_nand.c b/drivers/mtd/nand/raw/meson_nand.c
index 0d4d358152d7..f8bb40e486e4 100644
--- a/drivers/mtd/nand/raw/meson_nand.c
+++ b/drivers/mtd/nand/raw/meson_nand.c
@@ -91,6 +91,8 @@
 
 /* eMMC clock register, misc control */
 #define CLK_SELECT_NAND		BIT(31)
+#define CLK_ALWAYS_ON_NAND	BIT(24)
+#define CLK_SELECT_FIX_PLL2	BIT(6)
 
 #define NFC_CLK_CYCLE		6
 
@@ -1152,7 +1154,7 @@ static int meson_nfc_clk_init(struct meson_nfc *nfc)
 		return PTR_ERR(nfc->nand_clk);
 
 	/* init SD_EMMC_CLOCK to sane defaults w/min clock rate */
-	writel(CLK_SELECT_NAND | readl(nfc->reg_clk),
+	writel(CLK_ALWAYS_ON_NAND | CLK_SELECT_NAND | CLK_SELECT_FIX_PLL2,
 	       nfc->reg_clk);
 
 	ret = clk_prepare_enable(nfc->core_clk);
-- 
2.35.0