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73b406c456
This makes Odroid C2 use linux-amlogic and similar linux patches as WeTek Hub u-boot patch updated to allow overwriting env vars boot.ini updated to reflect missing features in linux-amlogic
97 lines
2.6 KiB
Diff
97 lines
2.6 KiB
Diff
From dee146cbbb8428b073fba85390577590fc365d86 Mon Sep 17 00:00:00 2001
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From: Joy Cho <joy.cho@hardkernel.com>
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Date: Wed, 31 Aug 2016 16:27:48 +0900
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Subject: [PATCH] ODROID-C2: Add setup routine to set max. cpu frequency of
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dvfs table
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- set "max_freq" in boot.ini
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- in MHz unit
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ex) setenv max_freq "1656"
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Change-Id: I352c9540d0c34d3ec0ba0f470dae9d4e0786c001
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---
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drivers/amlogic/mailbox/scpi_protocol.c | 53 +++++++++++++++++++++++++++++++++
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1 file changed, 53 insertions(+)
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diff --git a/drivers/amlogic/mailbox/scpi_protocol.c b/drivers/amlogic/mailbox/scpi_protocol.c
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index ec787d2..f3aa3e0 100644
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--- a/drivers/amlogic/mailbox/scpi_protocol.c
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+++ b/drivers/amlogic/mailbox/scpi_protocol.c
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@@ -85,6 +85,12 @@ static int high_priority_cmds[] = {
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SCPI_CMD_SENSOR_CFG_BOUNDS,
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};
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+#if defined(CONFIG_ARCH_MESON64_ODROIDC2)
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+#define DVFS_COUNT_MAX 13
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+#define DVFS_COUNT_1536 6
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+static unsigned long max_freq_dvfs;
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+#endif
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+
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static struct scpi_opp *scpi_opps[MAX_DVFS_DOMAINS];
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static int scpi_linux_errmap[SCPI_ERR_MAX] = {
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@@ -236,6 +242,9 @@ struct scpi_opp *scpi_dvfs_get_opps(u8 domain)
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struct scpi_opp *opps;
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size_t opps_sz;
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int count, ret;
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+#if defined(CONFIG_ARCH_MESON64_ODROIDC2)
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+ int i, max_index;
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+#endif
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if (domain >= MAX_DVFS_DOMAINS)
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return ERR_PTR(-EINVAL);
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@@ -254,6 +263,27 @@ struct scpi_opp *scpi_dvfs_get_opps(u8 domain)
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return ERR_PTR(-ENOMEM);
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count = DVFS_OPP_COUNT(buf.header);
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+
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+#if defined(CONFIG_ARCH_MESON64_ODROIDC2)
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+ max_index = 0;
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+ if (max_freq_dvfs) {
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+ for (i = 0; i < count; i++) {
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+ if (buf.opp[i].freq_hz == max_freq_dvfs)
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+ break;
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+ else
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+ max_index++;
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+ }
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+ count = max_index + 1;
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+ }
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+ /* if no param "max_freq_dvfs or wrong "max_freq_dvfs"
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+ * from boot.ini, consider stable max value */
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+ if ((max_freq_dvfs == 0) || (count > DVFS_COUNT_MAX))
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+ count = DVFS_COUNT_1536; /* default max : 1.536GHz */
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+
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+ pr_info("dvfs [%s] - new count %d, max_freq %ld\n", __func__,
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+ count, max_freq_dvfs);
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+#endif
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+
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opps_sz = count * sizeof(*(opps->opp));
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opps->count = count;
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@@ -422,3 +452,25 @@ int scpi_send_usr_data(u32 client_id, u32 *val, u32 size)
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}
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EXPORT_SYMBOL_GPL(scpi_send_usr_data);
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+#if defined(CONFIG_ARCH_MESON64_ODROIDC2)
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+static int __init get_max_freq(char *str)
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+{
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+ int ret;
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+
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+ if (NULL == str) {
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+ /* consider default set */
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+ max_freq_dvfs = 1536000000;
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+ return -EINVAL;
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+ }
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+
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+ ret = kstrtoul(str, 0, &max_freq_dvfs);
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+
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+ /* in unit Hz */
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+ max_freq_dvfs *= 1000000;
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+
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+ pr_info("dvfs [%s] - max_freq : %ld\n", __func__, max_freq_dvfs);
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+
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+ return 0;
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+}
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+__setup("max_freq=", get_max_freq);
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+#endif
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