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Message-Id: <20190228151337.12176-12-sashal@kernel.org>
Date: Thu, 28 Feb 2019 10:13:13 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Jose Abreu <jose.abreu@...opsys.com>,
Jose Abreu <joabreu@...opsys.com>,
Joao Pinto <jpinto@...opsys.com>,
"David S . Miller" <davem@...emloft.net>,
Giuseppe Cavallaro <peppe.cavallaro@...com>,
Alexandre Torgue <alexandre.torgue@...com>,
Sasha Levin <sashal@...nel.org>, netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 4.14 12/36] net: stmmac: Fallback to Platform Data clock in Watchdog conversion
From: Jose Abreu <jose.abreu@...opsys.com>
[ Upstream commit 4ec5302fa906ec9d86597b236f62315bacdb9622 ]
If we don't have DT then stmmac_clk will not be available. Let's add a
new Platform Data field so that we can specify the refclk by this mean.
This way we can still use the coalesce command in PCI based setups.
Signed-off-by: Jose Abreu <joabreu@...opsys.com>
Cc: Joao Pinto <jpinto@...opsys.com>
Cc: David S. Miller <davem@...emloft.net>
Cc: Giuseppe Cavallaro <peppe.cavallaro@...com>
Cc: Alexandre Torgue <alexandre.torgue@...com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
.../net/ethernet/stmicro/stmmac/stmmac_ethtool.c | 14 ++++++++++----
include/linux/stmmac.h | 1 +
2 files changed, 11 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
index c3c6335cbe9ae..ecddd9948788a 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
@@ -702,8 +702,11 @@ static u32 stmmac_usec2riwt(u32 usec, struct stmmac_priv *priv)
{
unsigned long clk = clk_get_rate(priv->plat->stmmac_clk);
- if (!clk)
- return 0;
+ if (!clk) {
+ clk = priv->plat->clk_ref_rate;
+ if (!clk)
+ return 0;
+ }
return (usec * (clk / 1000000)) / 256;
}
@@ -712,8 +715,11 @@ static u32 stmmac_riwt2usec(u32 riwt, struct stmmac_priv *priv)
{
unsigned long clk = clk_get_rate(priv->plat->stmmac_clk);
- if (!clk)
- return 0;
+ if (!clk) {
+ clk = priv->plat->clk_ref_rate;
+ if (!clk)
+ return 0;
+ }
return (riwt * 256) / (clk / 1000000);
}
diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
index 32feac5bbd75b..5844105a482bc 100644
--- a/include/linux/stmmac.h
+++ b/include/linux/stmmac.h
@@ -183,6 +183,7 @@ struct plat_stmmacenet_data {
struct clk *pclk;
struct clk *clk_ptp_ref;
unsigned int clk_ptp_rate;
+ unsigned int clk_ref_rate;
struct reset_control *stmmac_rst;
struct stmmac_axi *axi;
int has_gmac4;
--
2.19.1
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