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path: root/drivers/char/ipmi/ipmi_plat_data.c
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Diffstat (limited to 'drivers/char/ipmi/ipmi_plat_data.c')
-rw-r--r--drivers/char/ipmi/ipmi_plat_data.c124
1 files changed, 124 insertions, 0 deletions
diff --git a/drivers/char/ipmi/ipmi_plat_data.c b/drivers/char/ipmi/ipmi_plat_data.c
new file mode 100644
index 000000000..747b51ae0
--- /dev/null
+++ b/drivers/char/ipmi/ipmi_plat_data.c
@@ -0,0 +1,124 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/*
+ * Add an IPMI platform device.
+ */
+
+#include <linux/platform_device.h>
+#include "ipmi_plat_data.h"
+#include "ipmi_si.h"
+
+struct platform_device *ipmi_platform_add(const char *name, unsigned int inst,
+ struct ipmi_plat_data *p)
+{
+ struct platform_device *pdev;
+ unsigned int num_r = 1, size = 0, pidx = 0;
+ struct resource r[4];
+ struct property_entry pr[6];
+ u32 flags;
+ int rv;
+
+ memset(pr, 0, sizeof(pr));
+ memset(r, 0, sizeof(r));
+
+ if (p->iftype == IPMI_PLAT_IF_SI) {
+ if (p->type == SI_BT)
+ size = 3;
+ else if (p->type != SI_TYPE_INVALID)
+ size = 2;
+
+ if (p->regsize == 0)
+ p->regsize = DEFAULT_REGSIZE;
+ if (p->regspacing == 0)
+ p->regspacing = p->regsize;
+
+ pr[pidx++] = PROPERTY_ENTRY_U8("ipmi-type", p->type);
+ } else if (p->iftype == IPMI_PLAT_IF_SSIF) {
+ pr[pidx++] = PROPERTY_ENTRY_U16("i2c-addr", p->addr);
+ }
+
+ if (p->slave_addr)
+ pr[pidx++] = PROPERTY_ENTRY_U8("slave-addr", p->slave_addr);
+ pr[pidx++] = PROPERTY_ENTRY_U8("addr-source", p->addr_source);
+ if (p->regshift)
+ pr[pidx++] = PROPERTY_ENTRY_U8("reg-shift", p->regshift);
+ pr[pidx++] = PROPERTY_ENTRY_U8("reg-size", p->regsize);
+ /* Last entry must be left NULL to terminate it. */
+
+ pdev = platform_device_alloc(name, inst);
+ if (!pdev) {
+ pr_err("Error allocating IPMI platform device %s.%d\n",
+ name, inst);
+ return NULL;
+ }
+
+ if (size == 0)
+ /* An invalid or SSIF interface, no resources. */
+ goto add_properties;
+
+ /*
+ * Register spacing is derived from the resources in
+ * the IPMI platform code.
+ */
+
+ if (p->space == IPMI_IO_ADDR_SPACE)
+ flags = IORESOURCE_IO;
+ else
+ flags = IORESOURCE_MEM;
+
+ r[0].start = p->addr;
+ r[0].end = r[0].start + p->regsize - 1;
+ r[0].name = "IPMI Address 1";
+ r[0].flags = flags;
+
+ if (size > 1) {
+ r[1].start = r[0].start + p->regspacing;
+ r[1].end = r[1].start + p->regsize - 1;
+ r[1].name = "IPMI Address 2";
+ r[1].flags = flags;
+ num_r++;
+ }
+
+ if (size > 2) {
+ r[2].start = r[1].start + p->regspacing;
+ r[2].end = r[2].start + p->regsize - 1;
+ r[2].name = "IPMI Address 3";
+ r[2].flags = flags;
+ num_r++;
+ }
+
+ if (p->irq) {
+ r[num_r].start = p->irq;
+ r[num_r].end = p->irq;
+ r[num_r].name = "IPMI IRQ";
+ r[num_r].flags = IORESOURCE_IRQ;
+ num_r++;
+ }
+
+ rv = platform_device_add_resources(pdev, r, num_r);
+ if (rv) {
+ dev_err(&pdev->dev,
+ "Unable to add hard-code resources: %d\n", rv);
+ goto err;
+ }
+ add_properties:
+ rv = device_create_managed_software_node(&pdev->dev, pr, NULL);
+ if (rv) {
+ dev_err(&pdev->dev,
+ "Unable to add hard-code properties: %d\n", rv);
+ goto err;
+ }
+
+ rv = platform_device_add(pdev);
+ if (rv) {
+ dev_err(&pdev->dev,
+ "Unable to add hard-code device: %d\n", rv);
+ goto err;
+ }
+ return pdev;
+
+err:
+ platform_device_put(pdev);
+ return NULL;
+}
+EXPORT_SYMBOL(ipmi_platform_add);