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net: ethernet: mediatek: add controlling power domain the ethernet belongs to

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introduce power domain control which the digital circuit of
the ethernet belongs to inside the flow of hardware initialization
and deinitialization which helps the entire ethernet hardware block
could restart cleanly and completely as being back to the initial
state when the whole machine reboot.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sean Wang 2016-09-14 23:13:18 +08:00 committed by David S. Miller
parent 8a8a9e89f8
commit 26a2ad8a54
1 changed files with 7 additions and 0 deletions
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7
drivers/net/ethernet/mediatek/mtk_eth_soc.c
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@ -18,6 +18,7 @@
#include <linux/mfd/syscon.h> #include <linux/mfd/syscon.h>
#include <linux/regmap.h> #include <linux/regmap.h>
#include <linux/clk.h> #include <linux/clk.h>
#include <linux/pm_runtime.h>
#include <linux/if_vlan.h> #include <linux/if_vlan.h>
#include <linux/reset.h> #include <linux/reset.h>
#include <linux/tcp.h> #include <linux/tcp.h>
@ -1417,6 +1418,9 @@ static int __init mtk_hw_init(struct mtk_eth *eth)
{ {
int i; int i;
pm_runtime_enable(eth->dev);
pm_runtime_get_sync(eth->dev);
clk_prepare_enable(eth->clks[MTK_CLK_ETHIF]); clk_prepare_enable(eth->clks[MTK_CLK_ETHIF]);
clk_prepare_enable(eth->clks[MTK_CLK_ESW]); clk_prepare_enable(eth->clks[MTK_CLK_ESW]);
clk_prepare_enable(eth->clks[MTK_CLK_GP1]); clk_prepare_enable(eth->clks[MTK_CLK_GP1]);
@ -1484,6 +1488,9 @@ static int mtk_hw_deinit(struct mtk_eth *eth)
clk_disable_unprepare(eth->clks[MTK_CLK_ESW]); clk_disable_unprepare(eth->clks[MTK_CLK_ESW]);
clk_disable_unprepare(eth->clks[MTK_CLK_ETHIF]); clk_disable_unprepare(eth->clks[MTK_CLK_ETHIF]);
pm_runtime_put_sync(eth->dev);
pm_runtime_disable(eth->dev);
return 0; return 0;
} }