[PATCH 4.15 068/128] clk: ti: clkctrl: add support for retrying failed init

Greg Kroah-Hartman
2018-03-16T15:23:29Z

From: Tero Kristo <t-kristo@ti.com>

[ Upstream commit 729e13bf58e643b9accd2a14c55b555958702fb0 ]

In case the clkctrl node contains assigned-clock-* entries, registering
the provider can fail with -EPROBE_DEFER. In this case, add the
provider to the retry_init clock list so it will be cleaned up later.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/clk/ti/clkctrl.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)

--- a/drivers/clk/ti/clkctrl.c
+++ b/drivers/clk/ti/clkctrl.c
@@ -400,6 +400,12 @@ _ti_clkctrl_setup_subclks(struct omap_cl
}
}

+static void __init _clkctrl_add_provider(void *data,
+ struct device_node *np)
+{
+ of_clk_add_hw_provider(np, _ti_omap4_clkctrl_xlate, data);
+}
+
static void __init _ti_omap4_clkctrl_setup(struct device_node *node)
{
struct omap_clkctrl_provider *provider;
@@ -411,6 +417,7 @@ static void __init _ti_omap4_clkctrl_set
struct omap_clkctrl_clk *clkctrl_clk;
const __be32 *addrp;
u32 addr;
+ int ret;

addrp = of_get_address(node, 0, NULL, NULL);
addr = (u32)of_translate_address(node, addrp);
@@ -485,7 +492,10 @@ static void __init _ti_omap4_clkctrl_set
reg_data++;
}

- of_clk_add_hw_provider(node, _ti_omap4_clkctrl_xlate, provider);
+ ret = of_clk_add_hw_provider(node, _ti_omap4_clkctrl_xlate, provider);
+ if (ret == -EPROBE_DEFER)
+ ti_clk_retry_init(node, provider, _clkctrl_add_provider);
+
return;