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raimps: mtk_eth_soc: drop rst_esw from ESW driver

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The ESW core needs to be reset together with FE core, so after the
relevant reset controller lines are moved under FE, drop rst_esw and all
related code, which would not execute anyway, because rst_esw would be
NULL. While at that, ensure that if reset line for EPHY cannot be
claimed, a proper error message is reported.

Fixes: 60fadae62b ("ramips: ethernet: ralink: move reset of the esw into the esw instead of fe")

Co-developed-by: Maxim Anisimov <maxim.anisimov.ua@gmail.com>
Signed-off-by: Maxim Anisimov <maxim.anisimov.ua@gmail.com>

[Split out of the bigger commit, provide commit mesage, refactor error
handling]
Signed-off-by: Lech Perczak <lech.perczak@gmail.com>

(cherry picked from commit f393ffcac1)
Signed-off-by: Lech Perczak <lech.perczak@gmail.com>
This commit is contained in:
Lech Perczak 2023-12-15 17:25:05 +01:00
parent 5ef01117b7
commit 17ee3e0b20
1 changed files with 4 additions and 20 deletions
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24
target/linux/ramips/files/drivers/net/ethernet/ralink/esw_rt3050.c
View File

@ -235,7 +235,6 @@ struct rt305x_esw {
int led_frequency;
struct esw_vlan vlans[RT305X_ESW_NUM_VLANS];
struct esw_port ports[RT305X_ESW_NUM_PORTS];
struct reset_control *rst_esw;
struct reset_control *rst_ephy;
};
@ -259,18 +258,6 @@ static inline void esw_rmw_raw(struct rt305x_esw *esw, unsigned reg,
__raw_writel(t | val, esw->base + reg);
}
static void esw_reset(struct rt305x_esw *esw)
{
if (!esw->rst_esw)
return;
reset_control_assert(esw->rst_esw);
usleep_range(60, 120);
reset_control_deassert(esw->rst_esw);
/* the esw takes long to reset otherwise the board hang */
msleep(10);
}
static void esw_reset_ephy(struct rt305x_esw *esw)
{
if (!esw->rst_ephy)
@ -464,8 +451,6 @@ static void esw_hw_init(struct rt305x_esw *esw)
u8 port_disable = 0;
u8 port_map = RT305X_ESW_PMAP_LLLLLL;
esw_reset(esw);
/* vodoo from original driver */
esw_w32(esw, 0xC8A07850, RT305X_ESW_REG_FCT0);
esw_w32(esw, 0x00000000, RT305X_ESW_REG_SGC2);
@ -1435,12 +1420,11 @@ static int esw_probe(struct platform_device *pdev)
if (reg_init)
esw->reg_led_polarity = be32_to_cpu(*reg_init);
esw->rst_esw = devm_reset_control_get(&pdev->dev, "esw");
if (IS_ERR(esw->rst_esw))
esw->rst_esw = NULL;
esw->rst_ephy = devm_reset_control_get(&pdev->dev, "ephy");
if (IS_ERR(esw->rst_ephy))
esw->rst_ephy = devm_reset_control_get_exclusive(&pdev->dev, "ephy");
if (IS_ERR(esw->rst_ephy)) {
dev_err(esw->dev, "failed to get EPHY reset: %pe\n", esw->rst_ephy);
esw->rst_ephy = NULL;
}
spin_lock_init(&esw->reg_rw_lock);
platform_set_drvdata(pdev, esw);