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[ARM] pxa: fix frequency scaling for pcmcia/pxa2xx_base

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The MCxx values must be based off memory clock, not CPU core clock.

This also fixes the bug where on some machines the LCD went crazy
while using PCMCIA.

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Nicolas Pitre <nico@fluxnic.net>
Reviewed-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
This commit is contained in:
Marek Vasut 2010-06-18 07:48:54 +02:00 committed by Eric Miao
parent 3d3d0fbf4d
commit d344a21a9a
1 changed files with 2 additions and 3 deletions
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5
drivers/pcmcia/pxa2xx_base.c
View file

@ -178,7 +178,6 @@ pxa2xx_pcmcia_frequency_change(struct soc_pcmcia_socket *skt,
unsigned long val,
struct cpufreq_freqs *freqs)
{
#warning "it's not clear if this is right since the core CPU (N) clock has no effect on the memory (L) clock"
switch (val) {
case CPUFREQ_PRECHANGE:
if (freqs->new > freqs->old) {
@ -186,7 +185,7 @@ pxa2xx_pcmcia_frequency_change(struct soc_pcmcia_socket *skt,
"pre-updating\n",
freqs->new / 1000, (freqs->new / 100) % 10,
freqs->old / 1000, (freqs->old / 100) % 10);
pxa2xx_pcmcia_set_mcxx(skt, freqs->new);
pxa2xx_pcmcia_set_timing(skt);
}
break;
@ -196,7 +195,7 @@ pxa2xx_pcmcia_frequency_change(struct soc_pcmcia_socket *skt,
"post-updating\n",
freqs->new / 1000, (freqs->new / 100) % 10,
freqs->old / 1000, (freqs->old / 100) % 10);
pxa2xx_pcmcia_set_mcxx(skt, freqs->new);
pxa2xx_pcmcia_set_timing(skt);
}
break;
}