From: Wolfram Sang <wsa+renesas@...>

commit 45bffc371fefd8537804b001080a47c6b69d5efa upstream.

Only re-initialize SCC and tuning when an SCC was found during probe().
This is currently a noop because all R-Car Gen2+ are considered to have
an SCC. But this will change in a later patch, so we need this
preparation.

Signed-off-by: Wolfram Sang <wsa+renesas@...>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@...>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...>
Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...>
Link: https://lore.kernel.org/r/20201110142058.36393-2-wsa+renesas@sang-engineering.com
Signed-off-by: Ulf Hansson <ulf.hansson@...>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...>
---
drivers/mmc/host/renesas_sdhi_core.c | 18 ++++++++++--------
1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c
index 782879d46ff4..d5e7bbdffc53 100644
--- a/drivers/mmc/host/renesas_sdhi_core.c
+++ b/drivers/mmc/host/renesas_sdhi_core.c
@@ -556,16 +556,18 @@ static void renesas_sdhi_reset(struct tmio_mmc_host *host)
{
struct renesas_sdhi *priv = host_to_priv(host);

- renesas_sdhi_reset_scc(host, priv);
- renesas_sdhi_reset_hs400_mode(host, priv);
- priv->needs_adjust_hs400 = false;
+ if (priv->scc_ctl) {
+ renesas_sdhi_reset_scc(host, priv);
+ renesas_sdhi_reset_hs400_mode(host, priv);
+ priv->needs_adjust_hs400 = false;

- sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN |
- sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
+ sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN |
+ sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));

- sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL,
- ~SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN &
- sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL));
+ sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL,
+ ~SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN &
+ sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL));
+ }

if (host->pdata->flags & TMIO_MMC_MIN_RCAR2)
sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK,
--
2.17.1