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path: root/drivers/mfd/rsmu_i2c.c
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Diffstat (limited to 'drivers/mfd/rsmu_i2c.c')
-rw-r--r--drivers/mfd/rsmu_i2c.c171
1 files changed, 135 insertions, 36 deletions
diff --git a/drivers/mfd/rsmu_i2c.c b/drivers/mfd/rsmu_i2c.c
index 15d25b081434..221023faaadf 100644
--- a/drivers/mfd/rsmu_i2c.c
+++ b/drivers/mfd/rsmu_i2c.c
@@ -18,11 +18,12 @@
#include "rsmu.h"
/*
- * 16-bit register address: the lower 8 bits of the register address come
- * from the offset addr byte and the upper 8 bits come from the page register.
+ * 32-bit register address: the lower 8 bits of the register address come
+ * from the offset addr byte and the upper 24 bits come from the page register.
*/
-#define RSMU_CM_PAGE_ADDR 0xFD
-#define RSMU_CM_PAGE_WINDOW 256
+#define RSMU_CM_PAGE_ADDR 0xFC
+#define RSMU_CM_PAGE_MASK 0xFFFFFF00
+#define RSMU_CM_ADDRESS_MASK 0x000000FF
/*
* 15-bit register address: the lower 7 bits of the register address come
@@ -31,18 +32,6 @@
#define RSMU_SABRE_PAGE_ADDR 0x7F
#define RSMU_SABRE_PAGE_WINDOW 128
-static const struct regmap_range_cfg rsmu_cm_range_cfg[] = {
- {
- .range_min = 0,
- .range_max = 0xD000,
- .selector_reg = RSMU_CM_PAGE_ADDR,
- .selector_mask = 0xFF,
- .selector_shift = 0,
- .window_start = 0,
- .window_len = RSMU_CM_PAGE_WINDOW,
- }
-};
-
static const struct regmap_range_cfg rsmu_sabre_range_cfg[] = {
{
.range_min = 0,
@@ -55,35 +44,141 @@ static const struct regmap_range_cfg rsmu_sabre_range_cfg[] = {
}
};
-static bool rsmu_cm_volatile_reg(struct device *dev, unsigned int reg)
+static bool rsmu_sabre_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
- case RSMU_CM_PAGE_ADDR:
+ case RSMU_SABRE_PAGE_ADDR:
return false;
default:
return true;
}
}
-static bool rsmu_sabre_volatile_reg(struct device *dev, unsigned int reg)
+static int rsmu_read_device(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u16 bytes)
{
- switch (reg) {
- case RSMU_SABRE_PAGE_ADDR:
- return false;
- default:
- return true;
+ struct i2c_client *client = to_i2c_client(rsmu->dev);
+ struct i2c_msg msg[2];
+ int cnt;
+
+ msg[0].addr = client->addr;
+ msg[0].flags = 0;
+ msg[0].len = 1;
+ msg[0].buf = ®
+
+ msg[1].addr = client->addr;
+ msg[1].flags = I2C_M_RD;
+ msg[1].len = bytes;
+ msg[1].buf = buf;
+
+ cnt = i2c_transfer(client->adapter, msg, 2);
+
+ if (cnt < 0) {
+ dev_err(rsmu->dev, "i2c_transfer failed at addr: %04x!", reg);
+ return cnt;
+ } else if (cnt != 2) {
+ dev_err(rsmu->dev,
+ "i2c_transfer sent only %d of 2 messages", cnt);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int rsmu_write_device(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u16 bytes)
+{
+ struct i2c_client *client = to_i2c_client(rsmu->dev);
+ u8 msg[RSMU_MAX_WRITE_COUNT + 1]; /* 1 Byte added for the device register */
+ int cnt;
+
+ if (bytes > RSMU_MAX_WRITE_COUNT)
+ return -EINVAL;
+
+ msg[0] = reg;
+ memcpy(&msg[1], buf, bytes);
+
+ cnt = i2c_master_send(client, msg, bytes + 1);
+
+ if (cnt < 0) {
+ dev_err(&client->dev,
+ "i2c_master_send failed at addr: %04x!", reg);
+ return cnt;
}
+
+ return 0;
+}
+
+static int rsmu_write_page_register(struct rsmu_ddata *rsmu, u32 reg)
+{
+ u32 page = reg & RSMU_CM_PAGE_MASK;
+ u8 buf[4];
+ int err;
+
+ /* Do not modify offset register for none-scsr registers */
+ if (reg < RSMU_CM_SCSR_BASE)
+ return 0;
+
+ /* Simply return if we are on the same page */
+ if (rsmu->page == page)
+ return 0;
+
+ buf[0] = 0x0;
+ buf[1] = (u8)((page >> 8) & 0xFF);
+ buf[2] = (u8)((page >> 16) & 0xFF);
+ buf[3] = (u8)((page >> 24) & 0xFF);
+
+ err = rsmu_write_device(rsmu, RSMU_CM_PAGE_ADDR, buf, sizeof(buf));
+ if (err)
+ dev_err(rsmu->dev, "Failed to set page offset 0x%x\n", page);
+ else
+ /* Remember the last page */
+ rsmu->page = page;
+
+ return err;
+}
+
+static int rsmu_reg_read(void *context, unsigned int reg, unsigned int *val)
+{
+ struct rsmu_ddata *rsmu = i2c_get_clientdata((struct i2c_client *)context);
+ u8 addr = (u8)(reg & RSMU_CM_ADDRESS_MASK);
+ int err;
+
+ err = rsmu_write_page_register(rsmu, reg);
+ if (err)
+ return err;
+
+ err = rsmu_read_device(rsmu, addr, (u8 *)val, 1);
+ if (err)
+ dev_err(rsmu->dev, "Failed to read offset address 0x%x\n", addr);
+
+ return err;
+}
+
+static int rsmu_reg_write(void *context, unsigned int reg, unsigned int val)
+{
+ struct rsmu_ddata *rsmu = i2c_get_clientdata((struct i2c_client *)context);
+ u8 addr = (u8)(reg & RSMU_CM_ADDRESS_MASK);
+ u8 data = (u8)val;
+ int err;
+
+ err = rsmu_write_page_register(rsmu, reg);
+ if (err)
+ return err;
+
+ err = rsmu_write_device(rsmu, addr, &data, 1);
+ if (err)
+ dev_err(rsmu->dev,
+ "Failed to write offset address 0x%x\n", addr);
+
+ return err;
}
static const struct regmap_config rsmu_cm_regmap_config = {
- .reg_bits = 8,
+ .reg_bits = 32,
.val_bits = 8,
- .max_register = 0xD000,
- .ranges = rsmu_cm_range_cfg,
- .num_ranges = ARRAY_SIZE(rsmu_cm_range_cfg),
- .volatile_reg = rsmu_cm_volatile_reg,
- .cache_type = REGCACHE_RBTREE,
- .can_multi_write = true,
+ .max_register = 0x20120000,
+ .reg_read = rsmu_reg_read,
+ .reg_write = rsmu_reg_write,
+ .cache_type = REGCACHE_NONE,
};
static const struct regmap_config rsmu_sabre_regmap_config = {
@@ -101,14 +196,14 @@ static const struct regmap_config rsmu_sl_regmap_config = {
.reg_bits = 16,
.val_bits = 8,
.reg_format_endian = REGMAP_ENDIAN_BIG,
- .max_register = 0x339,
+ .max_register = 0x340,
.cache_type = REGCACHE_NONE,
.can_multi_write = true,
};
-static int rsmu_i2c_probe(struct i2c_client *client)
+static int rsmu_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
{
- const struct i2c_device_id *id = i2c_client_get_device_id(client);
const struct regmap_config *cfg;
struct rsmu_ddata *rsmu;
int ret;
@@ -136,7 +231,11 @@ static int rsmu_i2c_probe(struct i2c_client *client)
dev_err(rsmu->dev, "Unsupported RSMU device type: %d\n", rsmu->type);
return -ENODEV;
}
- rsmu->regmap = devm_regmap_init_i2c(client, cfg);
+
+ if (rsmu->type == RSMU_CM)
+ rsmu->regmap = devm_regmap_init(&client->dev, NULL, client, cfg);
+ else
+ rsmu->regmap = devm_regmap_init_i2c(client, cfg);
if (IS_ERR(rsmu->regmap)) {
ret = PTR_ERR(rsmu->regmap);
dev_err(rsmu->dev, "Failed to allocate register map: %d\n", ret);
@@ -180,7 +279,7 @@ static struct i2c_driver rsmu_i2c_driver = {
.name = "rsmu-i2c",
.of_match_table = of_match_ptr(rsmu_i2c_of_match),
},
- .probe_new = rsmu_i2c_probe,
+ .probe = rsmu_i2c_probe,
.remove = rsmu_i2c_remove,
.id_table = rsmu_i2c_id,
};