[PATCH v3 net-next 11/14] mfd: ocelot: add regmaps for ocelot_ext

Colin Foster
2022-09-26T00:32:41Z

The Ocelot switch core driver relies heavily on a fixed array of resources
for both ports and peripherals. This is in contrast to existing peripherals
- pinctrl for example - which have a one-to-one mapping of driver <>
resource. As such, these regmaps must be created differently so that
enumeration-based offsets are preserved.

Register the regmaps to the core MFD device unconditionally so they can be
referenced by the Ocelot switch / Felix DSA systems.

Signed-off-by: Colin Foster <colin.foster@in-advantage.com>
---

v3
* No change

v2
* Alignment of variables broken out to a separate patch
* Structs now correctly use EXPORT_SYMBOL*
* Logic moved and comments added to clear up conditionals around
vsc7512_target_io_res[i].start

v1 from previous RFC:
* New patch

---
drivers/mfd/ocelot-core.c | 87 ++++++++++++++++++++++++++++++++++++++
include/linux/mfd/ocelot.h | 5 +++
2 files changed, 92 insertions(+)

diff --git a/drivers/mfd/ocelot-core.c b/drivers/mfd/ocelot-core.c
index 013e83173062..702555fbdcc5 100644
--- a/drivers/mfd/ocelot-core.c
+++ b/drivers/mfd/ocelot-core.c
@@ -45,6 +45,45 @@
#define VSC7512_SIO_CTRL_RES_START 0x710700f8
#define VSC7512_SIO_CTRL_RES_SIZE 0x00000100

+#define VSC7512_HSIO_RES_START 0x710d0000
+#define VSC7512_HSIO_RES_SIZE 0x00000128
+
+#define VSC7512_ANA_RES_START 0x71880000
+#define VSC7512_ANA_RES_SIZE 0x00010000
+
+#define VSC7512_QS_RES_START 0x71080000
+#define VSC7512_QS_RES_SIZE 0x00000100
+
+#define VSC7512_QSYS_RES_START 0x71800000
+#define VSC7512_QSYS_RES_SIZE 0x00200000
+
+#define VSC7512_REW_RES_START 0x71030000
+#define VSC7512_REW_RES_SIZE 0x00010000
+
+#define VSC7512_SYS_RES_START 0x71010000
+#define VSC7512_SYS_RES_SIZE 0x00010000
+
+#define VSC7512_S0_RES_START 0x71040000
+#define VSC7512_S1_RES_START 0x71050000
+#define VSC7512_S2_RES_START 0x71060000
+#define VSC7512_S_RES_SIZE 0x00000400
+
+#define VSC7512_GCB_RES_START 0x71070000
+#define VSC7512_GCB_RES_SIZE 0x0000022c
+
+#define VSC7512_PORT_0_RES_START 0x711e0000
+#define VSC7512_PORT_1_RES_START 0x711f0000
+#define VSC7512_PORT_2_RES_START 0x71200000
+#define VSC7512_PORT_3_RES_START 0x71210000
+#define VSC7512_PORT_4_RES_START 0x71220000
+#define VSC7512_PORT_5_RES_START 0x71230000
+#define VSC7512_PORT_6_RES_START 0x71240000
+#define VSC7512_PORT_7_RES_START 0x71250000
+#define VSC7512_PORT_8_RES_START 0x71260000
+#define VSC7512_PORT_9_RES_START 0x71270000
+#define VSC7512_PORT_10_RES_START 0x71280000
+#define VSC7512_PORT_RES_SIZE 0x00010000
+
#define VSC7512_GCB_RST_SLEEP_US 100
#define VSC7512_GCB_RST_TIMEOUT_US 100000

@@ -96,6 +135,36 @@ static const struct resource vsc7512_sgpio_resources[] = {
DEFINE_RES_REG_NAMED(VSC7512_SIO_CTRL_RES_START, VSC7512_SIO_CTRL_RES_SIZE, "gcb_sio"),
};

+const struct resource vsc7512_target_io_res[TARGET_MAX] = {
+ [ANA] = DEFINE_RES_REG_NAMED(VSC7512_ANA_RES_START, VSC7512_ANA_RES_SIZE, "ana"),
+ [QS] = DEFINE_RES_REG_NAMED(VSC7512_QS_RES_START, VSC7512_QS_RES_SIZE, "qs"),
+ [QSYS] = DEFINE_RES_REG_NAMED(VSC7512_QSYS_RES_START, VSC7512_QSYS_RES_SIZE, "qsys"),
+ [REW] = DEFINE_RES_REG_NAMED(VSC7512_REW_RES_START, VSC7512_REW_RES_SIZE, "rew"),
+ [SYS] = DEFINE_RES_REG_NAMED(VSC7512_SYS_RES_START, VSC7512_SYS_RES_SIZE, "sys"),
+ [S0] = DEFINE_RES_REG_NAMED(VSC7512_S0_RES_START, VSC7512_S_RES_SIZE, "s0"),
+ [S1] = DEFINE_RES_REG_NAMED(VSC7512_S1_RES_START, VSC7512_S_RES_SIZE, "s1"),
+ [S2] = DEFINE_RES_REG_NAMED(VSC7512_S2_RES_START, VSC7512_S_RES_SIZE, "s2"),
+ [GCB] = DEFINE_RES_REG_NAMED(VSC7512_GCB_RES_START, VSC7512_GCB_RES_SIZE, "devcpu_gcb"),
+ [HSIO] = DEFINE_RES_REG_NAMED(VSC7512_HSIO_RES_START, VSC7512_HSIO_RES_SIZE, "hsio"),
+};
+EXPORT_SYMBOL_NS(vsc7512_target_io_res, MFD_OCELOT);
+
+const struct resource vsc7512_port_io_res[] = {
+ DEFINE_RES_REG_NAMED(VSC7512_PORT_0_RES_START, VSC7512_PORT_RES_SIZE, "port0"),
+ DEFINE_RES_REG_NAMED(VSC7512_PORT_1_RES_START, VSC7512_PORT_RES_SIZE, "port1"),
+ DEFINE_RES_REG_NAMED(VSC7512_PORT_2_RES_START, VSC7512_PORT_RES_SIZE, "port2"),
+ DEFINE_RES_REG_NAMED(VSC7512_PORT_3_RES_START, VSC7512_PORT_RES_SIZE, "port3"),
+ DEFINE_RES_REG_NAMED(VSC7512_PORT_4_RES_START, VSC7512_PORT_RES_SIZE, "port4"),
+ DEFINE_RES_REG_NAMED(VSC7512_PORT_5_RES_START, VSC7512_PORT_RES_SIZE, "port5"),
+ DEFINE_RES_REG_NAMED(VSC7512_PORT_6_RES_START, VSC7512_PORT_RES_SIZE, "port6"),
+ DEFINE_RES_REG_NAMED(VSC7512_PORT_7_RES_START, VSC7512_PORT_RES_SIZE, "port7"),
+ DEFINE_RES_REG_NAMED(VSC7512_PORT_8_RES_START, VSC7512_PORT_RES_SIZE, "port8"),
+ DEFINE_RES_REG_NAMED(VSC7512_PORT_9_RES_START, VSC7512_PORT_RES_SIZE, "port9"),
+ DEFINE_RES_REG_NAMED(VSC7512_PORT_10_RES_START, VSC7512_PORT_RES_SIZE, "port10"),
+ {}
+};
+EXPORT_SYMBOL_NS(vsc7512_port_io_res, MFD_OCELOT);
+
static const struct mfd_cell vsc7512_devs[] = {
{
.name = "ocelot-pinctrl",
@@ -144,6 +213,7 @@ static void ocelot_core_try_add_regmaps(struct device *dev,

int ocelot_core_init(struct device *dev)
{
+ const struct resource *port_res;
int i, ndevs;

ndevs = ARRAY_SIZE(vsc7512_devs);
@@ -151,6 +221,23 @@ int ocelot_core_init(struct device *dev)
for (i = 0; i < ndevs; i++)
ocelot_core_try_add_regmaps(dev, &vsc7512_devs[i]);

+ /*
+ * Both the target_io_res and the port_io_res structs need to be referenced directly by
+ * the ocelot_ext driver, so they can't be attached to the dev directly and referenced by
+ * offset like the rest of the drivers. Instead, create these regmaps always and allow any
+ * children look these up by name.
+ */
+ for (i = 0; i < TARGET_MAX; i++)
+ /*
+ * The target_io_res array is sparsely populated. Use .start as an indication that
+ * the entry isn't defined
+ */
+ if (vsc7512_target_io_res[i].start)
+ ocelot_core_try_add_regmap(dev, &vsc7512_target_io_res[i]);
+
+ for (port_res = vsc7512_port_io_res; port_res->start; port_res++)
+ ocelot_core_try_add_regmap(dev, port_res);
+
return devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, vsc7512_devs, ndevs, NULL, 0, NULL);
}
EXPORT_SYMBOL_NS(ocelot_core_init, MFD_OCELOT);
diff --git a/include/linux/mfd/ocelot.h b/include/linux/mfd/ocelot.h
index dd72073d2d4f..439ff5256cf0 100644
--- a/include/linux/mfd/ocelot.h
+++ b/include/linux/mfd/ocelot.h
@@ -11,8 +11,13 @@
#include <linux/regmap.h>
#include <linux/types.h>

+#include <soc/mscc/ocelot.h>
+
struct resource;

+extern const struct resource vsc7512_target_io_res[TARGET_MAX];
+extern const struct resource vsc7512_port_io_res[];
+
static inline struct regmap *
ocelot_regmap_from_resource_optional(struct platform_device *pdev,
unsigned int index,
--
2.25.1