memory: emif: Fix the lpmode timeout calculation
The driver tries to round up the specified timeout cycles to the next power of 2 value. This should be done defore updating timeout variable. Correcting this here. Reported-by: Nishanth Menon <nm@ti.com> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -728,13 +728,17 @@ static u32 get_pwr_mgmt_ctrl(u32 freq, struct emif_data *emif, u32 ip_rev)
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/* Timeout based on DDR frequency */
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timeout = freq >= freq_threshold ? timeout_perf : timeout_pwr;
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/* The value to be set in register is "log2(timeout) - 3" */
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/*
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* The value to be set in register is "log2(timeout) - 3"
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* if timeout < 16 load 0 in register
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* if timeout is not a power of 2, round to next highest power of 2
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*/
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if (timeout < 16) {
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timeout = 0;
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} else {
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timeout = __fls(timeout) - 3;
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if (timeout & (timeout - 1))
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timeout++;
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timeout <<= 1;
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timeout = __fls(timeout) - 3;
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}
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switch (lpmode) {
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