On 09/06/2018 04:22 PM, Ley Foon Tan wrote:
Add code to reset all reset signals as in SPI DT node. A reset property is an optional feature, so only print out a warning and do not fail if a reset property is not present.
If a reset property is discovered, then use it to deassert, thus bringing the IP out of reset.
Release reset when _remove().
Signed-off-by: Ley Foon Tan ley.foon.tan@intel.com
drivers/spi/designware_spi.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+)
diff --git a/drivers/spi/designware_spi.c b/drivers/spi/designware_spi.c index d8b73ea..b73ec38 100644 --- a/drivers/spi/designware_spi.c +++ b/drivers/spi/designware_spi.c @@ -17,6 +17,7 @@ #include <malloc.h> #include <spi.h> #include <fdtdec.h> +#include <reset.h> #include <linux/compat.h> #include <linux/iopoll.h> #include <asm/io.h> @@ -111,6 +112,8 @@ struct dw_spi_priv { void *tx_end; void *rx; void *rx_end;
- struct reset_ctl_bulk resets;
};
static inline u32 dw_read(struct dw_spi_priv *priv, u32 offset) @@ -231,6 +234,33 @@ err_rate: return -EINVAL; }
+static int dw_spi_reset(struct udevice *bus) +{
- int ret;
- struct dw_spi_priv *priv = dev_get_priv(bus);
- ret = reset_get_bulk(bus, &priv->resets);
- if (ret) {
/* Return 0 if error due to !CONFIG_DM_RESET and reset* DT property is not present.
Multiline comment style.
Otherwise Acked-by: Marek Vasut marex@denx.de
I'll let Jagan pick it for next.