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spmi: msm: Allow writes to SDAM02 reboot mode peripheral #32

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spmi: msm: Allow writes to SDAM02 reboot mode peripheral #32

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9 changes: 7 additions & 2 deletions drivers/spmi/spmi-msm.c
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Original file line number Diff line number Diff line change
Expand Up @@ -59,6 +59,8 @@
#define SPMI_MAX_SLAVES 16
#define SPMI_MAX_PERIPH 256

#define SDAM02_REBOOT_MODE_PID 0x71

#define SPMI_CHANNEL_READ_ONLY BIT(31)
#define SPMI_CHANNEL_VALID BIT(30)
#define SPMI_CHANNEL_MASK 0xffff
Expand Down Expand Up @@ -117,8 +119,11 @@ static int msm_spmi_write(struct udevice *dev, int usid, int pid, int off,
return -EIO;
if (!(priv->channel_map[usid][pid] & SPMI_CHANNEL_VALID))
return -EINVAL;
if (priv->channel_map[usid][pid] & SPMI_CHANNEL_READ_ONLY)
return -EPERM;
/* Skip readonly check for SDAM02 reboot reason pid */
if (priv->channel_map[usid][pid] & SPMI_CHANNEL_READ_ONLY) {
if (!(usid == 0 && pid == SDAM02_REBOOT_MODE_PID))
return -EPERM;
}

channel = priv->channel_map[usid][pid] & SPMI_CHANNEL_MASK;

Expand Down