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spmi: msm: introduce SPMI_CHANNEL_VALID flag

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Introduce the SPMI_CHANNEL_VALID flag so we can check if
a mapping exists for a SPMI command.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Tested-by: caleb.connolly@linaro.org # sdm845
Link: https://lore.kernel.org/r/20250328-topic-sm8x50-spmi-fix-v1-3-a7548d3aef0d@linaro.org
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
This commit is contained in:
Neil Armstrong 2025-03-28 09:53:23 +01:00 committed by Caleb Connolly
parent f252350623
commit 69400a696c
No known key found for this signature in database
GPG Key ID: 0583312B195F64B6
1 changed files with 7 additions and 2 deletions
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9
drivers/spmi/spmi-msm.c
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@ -63,6 +63,7 @@ DECLARE_GLOBAL_DATA_PTR;
#define SPMI_MAX_PERIPH 256
#define SPMI_CHANNEL_READ_ONLY BIT(31)
#define SPMI_CHANNEL_VALID BIT(30)
#define SPMI_CHANNEL_MASK 0xffff
enum arb_ver {
@ -117,6 +118,8 @@ static int msm_spmi_write(struct udevice *dev, int usid, int pid, int off,
return -EIO;
if (pid >= SPMI_MAX_PERIPH)
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;
@ -186,6 +189,8 @@ static int msm_spmi_read(struct udevice *dev, int usid, int pid, int off)
return -EIO;
if (pid >= SPMI_MAX_PERIPH)
return -EIO;
if (!(priv->channel_map[usid][pid] & SPMI_CHANNEL_VALID))
return -EINVAL;
channel = priv->channel_map[usid][pid] & SPMI_CHANNEL_MASK;
@ -256,7 +261,7 @@ static void msm_spmi_channel_map_v5(struct msm_spmi_priv *priv, unsigned int i,
uint32_t cnfg = readl(priv->spmi_cnfg + ARB_CHANNEL_OFFSET(i));
uint8_t owner = SPMI_OWNERSHIP_PERIPH2OWNER(cnfg);
priv->channel_map[slave_id][pid] = i;
priv->channel_map[slave_id][pid] = i | SPMI_CHANNEL_VALID;
if (owner != priv->owner)
priv->channel_map[slave_id][pid] |= SPMI_CHANNEL_READ_ONLY;
}
@ -319,7 +324,7 @@ static int msm_spmi_probe(struct udevice *dev)
switch (priv->arb_ver) {
case V2:
case V3:
priv->channel_map[slave_id][pid] = i;
priv->channel_map[slave_id][pid] = i | SPMI_CHANNEL_VALID;
break;
case V5: