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ARM: davinci: da850: fix infinite loop in clk_set_rate()
The aemif clock is added twice to the lookup table in da850.c. This breaks the children list of pll0_sysclk3 as we're using the same list links in struct clk. When calling clk_set_rate(), we get stuck in propagate_rate(). Create a separate clock for nand, inheriting the rate of the aemif clock and retrieve it in the davinci_nand module. Cc: <stable@vger.kernel.org> # 4.9.x Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: Sekhar Nori <nsekhar@ti.com>
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@ -367,6 +367,16 @@ static struct clk aemif_clk = {
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.flags = ALWAYS_ENABLED,
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};
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/*
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* In order to avoid adding the aemif_clk to the clock lookup table twice (and
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* screwing up the linked list in the process) create a separate clock for
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* nand inheriting the rate from aemif_clk.
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*/
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static struct clk aemif_nand_clk = {
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.name = "nand",
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.parent = &aemif_clk,
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};
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static struct clk usb11_clk = {
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.name = "usb11",
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.parent = &pll0_sysclk4,
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@ -537,7 +547,15 @@ static struct clk_lookup da850_clks[] = {
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CLK("da830-mmc.0", NULL, &mmcsd0_clk),
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CLK("da830-mmc.1", NULL, &mmcsd1_clk),
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CLK("ti-aemif", NULL, &aemif_clk),
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CLK(NULL, "aemif", &aemif_clk),
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/*
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* The only user of this clock is davinci_nand and it get's it through
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* con_id. The nand node itself is created from within the aemif
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* driver to guarantee that it's probed after the aemif timing
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* parameters are configured. of_dev_auxdata is not accessible from
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* the aemif driver and can't be passed to of_platform_populate(). For
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* that reason we're leaving the dev_id here as NULL.
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*/
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CLK(NULL, "aemif", &aemif_nand_clk),
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CLK("ohci-da8xx", "usb11", &usb11_clk),
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CLK("musb-da8xx", "usb20", &usb20_clk),
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CLK("spi_davinci.0", NULL, &spi0_clk),
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