Add optional reset support into the Denali NAND driver. In case there is a valid reset entry in the DT, the reset gets deasserted before the NAND controller gets used.
Signed-off-by: Marek Vasut marex@denx.de Cc: Masahiro Yamada yamada.masahiro@socionext.com --- drivers/mtd/nand/denali_dt.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/mtd/nand/denali_dt.c b/drivers/mtd/nand/denali_dt.c index 65a7797f0f..6fcd7d3843 100644 --- a/drivers/mtd/nand/denali_dt.c +++ b/drivers/mtd/nand/denali_dt.c @@ -9,6 +9,7 @@ #include <linux/io.h> #include <linux/ioport.h> #include <linux/printk.h> +#include <reset.h>
#include "denali.h"
@@ -64,6 +65,7 @@ static int denali_dt_probe(struct udevice *dev) const struct denali_dt_data *data; struct clk clk; struct resource res; + struct reset_ctl reset_ctl; int ret;
data = (void *)dev_get_driver_data(dev); @@ -97,6 +99,13 @@ static int denali_dt_probe(struct udevice *dev)
denali->clk_x_rate = clk_get_rate(&clk);
+ ret = reset_get_by_index(dev, 0, &reset_ctl); + if (!ret) { + reset_assert(&reset_ctl); + udelay(2); + reset_deassert(&reset_ctl); + } + return denali_init(denali); }