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RK3368 DDR: change get ddr freq method

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The old method get ddr freq from MCU through mailbox,and new method get ddr
freq from ddrpctl register

Signed-off-by: Tang Yun ping <typ@rock-chips.com>
This commit is contained in:
Tang Yun ping 2015-05-14 09:59:10 +08:00
parent 862e9c8a84
commit 6b68cd05df
1 changed files with 11 additions and 6 deletions
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17
drivers/devfreq/ddr_rk3368.c
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@ -64,6 +64,16 @@ struct rockchip_ddr {
static struct rockchip_ddr *ddr_data = NULL;
static int _ddr_recalc_rate(void)
{
int ddr_freq;
regmap_read(ddr_data->ddrpctl_regs, DDR_PCTL_TOGCNT_1U,
&ddr_freq);
ddr_freq = ddr_freq * 2 * 1000000;
return ddr_freq;
}
static int _ddr_change_freq(u32 n_mhz)
{
u32 ret;
@ -71,7 +81,7 @@ static int _ddr_change_freq(u32 n_mhz)
printk(KERN_DEBUG pr_fmt("In func %s,freq=%dMHz\n"), __func__, n_mhz);
if (scpi_ddr_set_clk_rate(n_mhz))
pr_info("set ddr freq timeout\n");
ret = scpi_ddr_get_clk_rate();
ret = _ddr_recalc_rate() / 1000000;
printk(KERN_DEBUG pr_fmt("Func %s out,freq=%dMHz\n"), __func__, ret);
return ret;
}
@ -81,11 +91,6 @@ static long _ddr_round_rate(u32 n_mhz)
return (n_mhz / 12) * 12;
}
static int _ddr_recalc_rate(void)
{
return (1000000 * scpi_ddr_get_clk_rate());
}
static void _ddr_set_auto_self_refresh(bool en)
{
if (scpi_ddr_set_auto_self_refresh(en))