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author | Philipp Zabel <p.zabel@pengutronix.de> | 2017-07-11 11:30:50 +0200 |
---|---|---|
committer | Lucas Stach <l.stach@pengutronix.de> | 2017-07-12 16:51:45 +0200 |
commit | e667f820eb373f221c9c220341178fe5e869d15a (patch) | |
tree | ced1cd714c33e524d20227c9f468e0f08d3cd64c /drivers | |
parent | 06c1f19cb3bc38d3d725bb0b2acabfd55e6e5882 (diff) | |
download | barebox-e667f820eb373f221c9c220341178fe5e869d15a.tar.gz barebox-e667f820eb373f221c9c220341178fe5e869d15a.tar.xz |
i.MX: clk-pllv3: Initially disable PLL_BYPASS bit
Commit cbff8031b491 ("i.MX: clk-pllv3: Do not touch PLL_BYPASS bit")
overreached a bit by removing the code that disables the PLL_BYPASS bit
for all architectures instead of making an exception for Vybrid and
i.MX6SL. This causes the USB controller on i.MX6Q to run at bypass
frequency and fail:
barebox@Boundary Devices i.MX6 Quad Nitrogen6x Board:/ usb
usb: USB: scanning bus for devices...
usb: Bus 001 Device 001: ID 0000:0000 EHCI Host Controller
imx-usb 2184200.usb: port(0) reset error
This patch adds code to unconditionally disable the PLL_BYPASS bit
initially, when the PLL clocks are registered.
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Fixes: cbff8031b491 ("i.MX: clk-pllv3: Do not touch PLL_BYPASS bit")
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/clk/imx/clk-pllv3.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/clk/imx/clk-pllv3.c b/drivers/clk/imx/clk-pllv3.c index 0e55a63e92..44642e88f3 100644 --- a/drivers/clk/imx/clk-pllv3.c +++ b/drivers/clk/imx/clk-pllv3.c @@ -370,6 +370,7 @@ struct clk *imx_clk_pllv3(enum imx_pllv3_type type, const char *name, struct clk_pllv3 *pll; const struct clk_ops *ops; int ret; + u32 val; pll = xzalloc(sizeof(*pll)); @@ -414,6 +415,10 @@ struct clk *imx_clk_pllv3(enum imx_pllv3_type type, const char *name, pll->clk.parent_names = &pll->parent; pll->clk.num_parents = 1; + val = readl(pll->base); + val &= ~BM_PLL_BYPASS; + writel(val, pll->base); + ret = clk_register(&pll->clk); if (ret) { free(pll); |