[PATCH v3 1/3] ARM: da850: fix infinite loop in clk_set_rate()
David Lechner
david at lechnology.com
Tue Dec 6 17:54:44 PST 2016
On 12/05/2016 04:09 AM, Bartosz Golaszewski wrote:
> 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().
&emac_clk is used twice in this list as well. Shouldn't we fix it too? I
would expect that it causes the same problem.
>
> Create a separate clock for nand, inheriting the rate of the aemif
> clock and retrieve it in the davinci_nand module.
>
> Signed-off-by: Bartosz Golaszewski <bgolaszewski at baylibre.com>
> ---
> arch/arm/mach-davinci/da850.c | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/mach-davinci/da850.c b/arch/arm/mach-davinci/da850.c
> index e770c97..c008e5e 100644
> --- a/arch/arm/mach-davinci/da850.c
> +++ b/arch/arm/mach-davinci/da850.c
> @@ -367,6 +367,11 @@ static struct clk aemif_clk = {
> .flags = ALWAYS_ENABLED,
> };
>
> +static struct clk aemif_nand_clk = {
> + .name = "nand",
> + .parent = &aemif_clk,
> +};
> +
> static struct clk usb11_clk = {
> .name = "usb11",
> .parent = &pll0_sysclk4,
> @@ -537,7 +542,7 @@ static struct clk_lookup da850_clks[] = {
> CLK("da830-mmc.0", NULL, &mmcsd0_clk),
> CLK("da830-mmc.1", NULL, &mmcsd1_clk),
> CLK("ti-aemif", NULL, &aemif_clk),
> - CLK(NULL, "aemif", &aemif_clk),
> + CLK(NULL, "aemif", &aemif_nand_clk),
> CLK("ohci-da8xx", "usb11", &usb11_clk),
> CLK("musb-da8xx", "usb20", &usb20_clk),
> CLK("spi_davinci.0", NULL, &spi0_clk),
>
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