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Subject[PATCH] mfd: db8500-prcmu: Support the higher DB8520 ARMSS
Date
The DB8520 used in a lot of Samsung phones has a slightly higher
maximum ARMSS frequency than the DB8500. In order to not confuse
the OPP framework and cpufreq, make sure the PRCMU driver
returns the correct frequency.

Cc: Lee Jones <lee.jones@linaro.org>
Cc: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
drivers/mfd/db8500-prcmu.c | 40 +++++++++++++++++++++++++++++++++-----
1 file changed, 35 insertions(+), 5 deletions(-)

diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c
index a1e09bf06977..6c9905652e08 100644
--- a/drivers/mfd/db8500-prcmu.c
+++ b/drivers/mfd/db8500-prcmu.c
@@ -1692,21 +1692,41 @@ static long round_clock_rate(u8 clock, unsigned long rate)
return rounded_rate;
}

-static const unsigned long armss_freqs[] = {
+static const unsigned long db8500_armss_freqs[] = {
200000000,
400000000,
800000000,
998400000
};

+/* The DB8520 has slightly higher ARMSS max frequency */
+static const unsigned long db8520_armss_freqs[] = {
+ 200000000,
+ 400000000,
+ 800000000,
+ 1152000000
+};
+
+
+
static long round_armss_rate(unsigned long rate)
{
unsigned long freq = 0;
+ const unsigned long *freqs;
+ int nfreqs;
int i;

+ if (fw_info.version.project == PRCMU_FW_PROJECT_U8520) {
+ freqs = db8520_armss_freqs;
+ nfreqs = ARRAY_SIZE(db8520_armss_freqs);
+ } else {
+ freqs = db8500_armss_freqs;
+ nfreqs = ARRAY_SIZE(db8500_armss_freqs);
+ }
+
/* Find the corresponding arm opp from the cpufreq table. */
- for (i = 0; i < ARRAY_SIZE(armss_freqs); i++) {
- freq = armss_freqs[i];
+ for (i = 0; i < nfreqs; i++) {
+ freq = freqs[i];
if (rate <= freq)
break;
}
@@ -1851,11 +1871,21 @@ static int set_armss_rate(unsigned long rate)
{
unsigned long freq;
u8 opps[] = { ARM_EXTCLK, ARM_50_OPP, ARM_100_OPP, ARM_MAX_OPP };
+ const unsigned long *freqs;
+ int nfreqs;
int i;

+ if (fw_info.version.project == PRCMU_FW_PROJECT_U8520) {
+ freqs = db8520_armss_freqs;
+ nfreqs = ARRAY_SIZE(db8520_armss_freqs);
+ } else {
+ freqs = db8500_armss_freqs;
+ nfreqs = ARRAY_SIZE(db8500_armss_freqs);
+ }
+
/* Find the corresponding arm opp from the cpufreq table. */
- for (i = 0; i < ARRAY_SIZE(armss_freqs); i++) {
- freq = armss_freqs[i];
+ for (i = 0; i < nfreqs; i++) {
+ freq = freqs[i];
if (rate == freq)
break;
}
--
2.21.0
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