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[V1,net-next,2/3] net: stmmac: add platform level clocks management

Message ID 20210223104818.1933-3-qiangqing.zhang@nxp.com (mailing list archive)
State Deferred
Delegated to: Netdev Maintainers
Headers show
Series net: stmmac: implement clocks | expand

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netdev/cc_maintainers warning 9 maintainers not CCed: linux-stm32@st-md-mailman.stormreply.com fugang.duan@nxp.com kim.tatt.chuah@intel.com boon.leong.ong@intel.com mcoquelin.stm32@gmail.com rusaimi.amira.rusaimi@intel.com vee.khee.wong@intel.com weifeng.voon@intel.com linux-arm-kernel@lists.infradead.org
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netdev/build_32bit success Errors and warnings before: 22 this patch: 22
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netdev/stable success Stable not CCed

Commit Message

Joakim Zhang Feb. 23, 2021, 10:48 a.m. UTC 
This patch intends to add platform level clocks management. Some
platforms may have their own special clocks, they also need to be
managed dynamically. If you want to manage such clocks, please implement
clks_enable callback.

Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 10 ++++++++++
 include/linux/stmmac.h                            |  1 +
 2 files changed, 11 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 35a79c00a477..3f12faa224aa 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -126,9 +126,19 @@  static int stmmac_bus_clks_enable(struct stmmac_priv *priv, bool enabled)
 			clk_disable_unprepare(priv->plat->stmmac_clk);
 			return ret;
 		}
+		if (priv->plat->clks_enable) {
+			ret = priv->plat->clks_enable(priv->plat->bsp_priv, enabled);
+			if (ret) {
+				clk_disable_unprepare(priv->plat->stmmac_clk);
+				clk_disable_unprepare(priv->plat->pclk);
+				return ret;
+			}
+		}
 	} else {
 		clk_disable_unprepare(priv->plat->stmmac_clk);
 		clk_disable_unprepare(priv->plat->pclk);
+		if (priv->plat->clks_enable)
+			priv->plat->clks_enable(priv->plat->bsp_priv, enabled);
 	}
 
 	return ret;
diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
index a302982de2d7..f2486a0ab5f1 100644
--- a/include/linux/stmmac.h
+++ b/include/linux/stmmac.h
@@ -183,6 +183,7 @@  struct plat_stmmacenet_data {
 	int (*init)(struct platform_device *pdev, void *priv);
 	void (*exit)(struct platform_device *pdev, void *priv);
 	struct mac_device_info *(*setup)(void *priv);
+	int (*clks_enable)(void *priv, bool enabled);
 	void *bsp_priv;
 	struct clk *stmmac_clk;
 	struct clk *pclk;