SM501: initialise SDRAM clock before bus clocks (b5913bbd) · Commits · 戴 / test

This init sequence of setting the SDRAM clock before the bus clock is recommend by Silicon Motion to stop problems with writes not sticking into registers. Signed-off-by:

Vincent Sanders <vince@simtec.co.uk> Signed-off-by:

Ben Dooks <ben-linux@fluff.org> Signed-off-by:

Andrew Morton <akpm@linux-foundation.org> Signed-off-by:

Linus Torvalds <torvalds@linux-foundation.org>

drivers/mfd/sm501.c

+5 −5

Original line number	Diff line number	Diff line
		@@ -843,15 +843,15 @@ static void sm501_init_regs(struct sm501_devdata *sm,
		sm501_init_reg(sm, SM501_GPIO31_0_CONTROL, &init->gpio_low);
		sm501_init_reg(sm, SM501_GPIO63_32_CONTROL, &init->gpio_high);

		if (init->mclk) {
		dev_info(sm->dev, "setting MCLK to %ld\n", init->mclk);
		sm501_set_clock(sm->dev, SM501_CLOCK_MCLK, init->mclk);
		}

		if (init->m1xclk) {
		dev_info(sm->dev, "setting M1XCLK to %ld\n", init->m1xclk);
		sm501_set_clock(sm->dev, SM501_CLOCK_M1XCLK, init->m1xclk);
		}

		if (init->mclk) {
		dev_info(sm->dev, "setting MCLK to %ld\n", init->mclk);
		sm501_set_clock(sm->dev, SM501_CLOCK_MCLK, init->mclk);
		}
		}

		static unsigned int sm501_mem_local[] = {

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