[PATCH 09/12] spmi: pmic-arb: Make the APID init a version operation

Stephen Boyd
2024-05-07T21:08:15Z

Rather than using conditionals in probe function, add the APID init
as a version specific operation. Due to v7, which supports multiple
buses, pass on the bus index to be used for sorting out the apid base
and count.

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/20240417-spmi-multi-master-support-v10-4-5bc6d322e266@linaro.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
---
drivers/spmi/spmi-pmic-arb.c | 146 +++++++++++++++++------------------
1 file changed, 70 insertions(+), 76 deletions(-)

diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
index 12c0efd744c2..fe45d62a42e2 100644
--- a/drivers/spmi/spmi-pmic-arb.c
+++ b/drivers/spmi/spmi-pmic-arb.c
@@ -186,6 +186,7 @@ struct spmi_pmic_arb {
* struct pmic_arb_ver_ops - version dependent functionality.
*
* @ver_str: version string.
+ * @init_apid: finds the apid base and count
* @ppid_to_apid: finds the apid for a given ppid.
* @non_data_cmd: on v1 issues an spmi non-data command.
* on v2 no HW support, returns -EOPNOTSUPP.
@@ -205,6 +206,7 @@ struct spmi_pmic_arb {
*/
struct pmic_arb_ver_ops {
const char *ver_str;
+ int (*init_apid)(struct spmi_pmic_arb *pmic_arb);
int (*ppid_to_apid)(struct spmi_pmic_arb *pmic_arb, u16 ppid);
/* spmi commands (read_cmd, write_cmd, cmd) functionality */
int (*offset)(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
@@ -947,6 +949,32 @@ static int qpnpint_irq_domain_alloc(struct irq_domain *domain,
return 0;
}

+static int pmic_arb_init_apid_min_max(struct spmi_pmic_arb *pmic_arb)
+{
+ /*
+ * Initialize max_apid/min_apid to the opposite bounds, during
+ * the irq domain translation, we are sure to update these
+ */
+ pmic_arb->max_apid = 0;
+ pmic_arb->min_apid = pmic_arb->max_periphs - 1;
+
+ return 0;
+}
+
+static int pmic_arb_init_apid_v1(struct spmi_pmic_arb *pmic_arb)
+{
+ u32 *mapping_table;
+
+ mapping_table = devm_kcalloc(&pmic_arb->spmic->dev, pmic_arb->max_periphs,
+ sizeof(*mapping_table), GFP_KERNEL);
+ if (!mapping_table)
+ return -ENOMEM;
+
+ pmic_arb->mapping_table = mapping_table;
+
+ return pmic_arb_init_apid_min_max(pmic_arb);
+}
+
static int pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb *pmic_arb, u16 ppid)
{
u32 *mapping_table = pmic_arb->mapping_table;
@@ -1149,6 +1177,34 @@ static int pmic_arb_offset_v2(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr,
return 0x1000 * pmic_arb->ee + 0x8000 * apid;
}

+static int pmic_arb_init_apid_v5(struct spmi_pmic_arb *pmic_arb)
+{
+ int ret;
+
+ pmic_arb->base_apid = 0;
+ pmic_arb->apid_count = readl_relaxed(pmic_arb->core + PMIC_ARB_FEATURES) &
+ PMIC_ARB_FEATURES_PERIPH_MASK;
+
+ if (pmic_arb->base_apid + pmic_arb->apid_count > pmic_arb->max_periphs) {
+ dev_err(&pmic_arb->spmic->dev, "Unsupported APID count %d detected\n",
+ pmic_arb->base_apid + pmic_arb->apid_count);
+ return -EINVAL;
+ }
+
+ ret = pmic_arb_init_apid_min_max(pmic_arb);
+ if (ret)
+ return ret;
+
+ ret = pmic_arb_read_apid_map_v5(pmic_arb);
+ if (ret) {
+ dev_err(&pmic_arb->spmic->dev, "could not read APID->PPID mapping table, rc= %d\n",
+ ret);
+ return ret;
+ }
+
+ return 0;
+}
+
/*
* v5 offset per ee and per apid for observer channels and per apid for
* read/write channels.
@@ -1363,6 +1419,7 @@ pmic_arb_apid_owner_v7(struct spmi_pmic_arb *pmic_arb, u16 n)

static const struct pmic_arb_ver_ops pmic_arb_v1 = {
.ver_str = "v1",
+ .init_apid = pmic_arb_init_apid_v1,
.ppid_to_apid = pmic_arb_ppid_to_apid_v1,
.non_data_cmd = pmic_arb_non_data_cmd_v1,
.offset = pmic_arb_offset_v1,
@@ -1377,6 +1434,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v1 = {

static const struct pmic_arb_ver_ops pmic_arb_v2 = {
.ver_str = "v2",
+ .init_apid = pmic_arb_init_apid_v1,
.ppid_to_apid = pmic_arb_ppid_to_apid_v2,
.non_data_cmd = pmic_arb_non_data_cmd_v2,
.offset = pmic_arb_offset_v2,
@@ -1391,6 +1449,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v2 = {

static const struct pmic_arb_ver_ops pmic_arb_v3 = {
.ver_str = "v3",
+ .init_apid = pmic_arb_init_apid_v1,
.ppid_to_apid = pmic_arb_ppid_to_apid_v2,
.non_data_cmd = pmic_arb_non_data_cmd_v2,
.offset = pmic_arb_offset_v2,
@@ -1405,6 +1464,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v3 = {

static const struct pmic_arb_ver_ops pmic_arb_v5 = {
.ver_str = "v5",
+ .init_apid = pmic_arb_init_apid_v5,
.ppid_to_apid = pmic_arb_ppid_to_apid_v5,
.non_data_cmd = pmic_arb_non_data_cmd_v2,
.offset = pmic_arb_offset_v5,
@@ -1419,6 +1479,7 @@ static const struct pmic_arb_ver_ops pmic_arb_v5 = {

static const struct pmic_arb_ver_ops pmic_arb_v7 = {
.ver_str = "v7",
+ .init_apid = pmic_arb_init_apid_v5,
.ppid_to_apid = pmic_arb_ppid_to_apid_v5,
.non_data_cmd = pmic_arb_non_data_cmd_v2,
.offset = pmic_arb_offset_v7,
@@ -1444,7 +1505,6 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
struct spmi_controller *ctrl;
struct resource *res;
void __iomem *core;
- u32 *mapping_table;
u32 channel, ee, hw_ver;
int err;

@@ -1472,12 +1532,6 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)

pmic_arb->core_size = resource_size(res);

- pmic_arb->ppid_to_apid = devm_kcalloc(&ctrl->dev, PMIC_ARB_MAX_PPID,
- sizeof(*pmic_arb->ppid_to_apid),
- GFP_KERNEL);
- if (!pmic_arb->ppid_to_apid)
- return -ENOMEM;
-
hw_ver = readl_relaxed(core + PMIC_ARB_VERSION);

if (hw_ver < PMIC_ARB_VERSION_V2_MIN) {
@@ -1511,59 +1565,18 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
return -ENOMEM;
}

- pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS;
-
- if (hw_ver >= PMIC_ARB_VERSION_V7_MIN) {
- pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS_V7;
- /* Optional property for v7: */
- of_property_read_u32(pdev->dev.of_node, "qcom,bus-id",
- &pmic_arb->bus_instance);
- if (pmic_arb->bus_instance > 1) {
- dev_err(&pdev->dev, "invalid bus instance (%u) specified\n",
- pmic_arb->bus_instance);
- return -EINVAL;
- }
-
- if (pmic_arb->bus_instance == 0) {
- pmic_arb->base_apid = 0;
- pmic_arb->apid_count =
- readl_relaxed(core + PMIC_ARB_FEATURES) &
- PMIC_ARB_FEATURES_PERIPH_MASK;
- } else {
- pmic_arb->base_apid =
- readl_relaxed(core + PMIC_ARB_FEATURES) &
- PMIC_ARB_FEATURES_PERIPH_MASK;
- pmic_arb->apid_count =
- readl_relaxed(core + PMIC_ARB_FEATURES1) &
- PMIC_ARB_FEATURES_PERIPH_MASK;
- }
-
- if (pmic_arb->base_apid + pmic_arb->apid_count > pmic_arb->max_periphs) {
- dev_err(&pdev->dev, "Unsupported APID count %d detected\n",
- pmic_arb->base_apid + pmic_arb->apid_count);
- return -EINVAL;
- }
- } else if (hw_ver >= PMIC_ARB_VERSION_V5_MIN) {
- pmic_arb->base_apid = 0;
- pmic_arb->apid_count = readl_relaxed(core + PMIC_ARB_FEATURES) &
- PMIC_ARB_FEATURES_PERIPH_MASK;
-
- if (pmic_arb->apid_count > pmic_arb->max_periphs) {
- dev_err(&pdev->dev, "Unsupported APID count %d detected\n",
- pmic_arb->apid_count);
- return -EINVAL;
- }
- }
-
- pmic_arb->apid_data = devm_kcalloc(&ctrl->dev, pmic_arb->max_periphs,
- sizeof(*pmic_arb->apid_data),
- GFP_KERNEL);
- if (!pmic_arb->apid_data)
- return -ENOMEM;
-
dev_info(&ctrl->dev, "PMIC arbiter version %s (0x%x)\n",
pmic_arb->ver_ops->ver_str, hw_ver);

+ if (hw_ver < PMIC_ARB_VERSION_V7_MIN)
+ pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS;
+ else
+ pmic_arb->max_periphs = PMIC_ARB_MAX_PERIPHS_V7;
+
+ err = pmic_arb->ver_ops->init_apid(pmic_arb);
+ if (err)
+ return err;
+
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "intr");
pmic_arb->intr = devm_ioremap_resource(&ctrl->dev, res);
if (IS_ERR(pmic_arb->intr))
@@ -1604,16 +1617,6 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
}

pmic_arb->ee = ee;
- mapping_table = devm_kcalloc(&ctrl->dev, pmic_arb->max_periphs,
- sizeof(*mapping_table), GFP_KERNEL);
- if (!mapping_table)
- return -ENOMEM;
-
- pmic_arb->mapping_table = mapping_table;
- /* Initialize max_apid/min_apid to the opposite bounds, during
- * the irq domain translation, we are sure to update these */
- pmic_arb->max_apid = 0;
- pmic_arb->min_apid = pmic_arb->max_periphs - 1;

platform_set_drvdata(pdev, ctrl);
raw_spin_lock_init(&pmic_arb->lock);
@@ -1622,15 +1625,6 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
ctrl->read_cmd = pmic_arb_read_cmd;
ctrl->write_cmd = pmic_arb_write_cmd;

- if (hw_ver >= PMIC_ARB_VERSION_V5_MIN) {
- err = pmic_arb_read_apid_map_v5(pmic_arb);
- if (err) {
- dev_err(&pdev->dev, "could not read APID->PPID mapping table, rc= %d\n",
- err);
- return err;
- }
- }
-
dev_dbg(&pdev->dev, "adding irq domain\n");
pmic_arb->domain = irq_domain_add_tree(pdev->dev.of_node,
&pmic_arb_irq_domain_ops, pmic_arb);