mfd: Convert wm8350 physical I/O to regmap API
The driver still uses a custom cache implementation but the underlying
physical I/O is now done using the regmap API, saving some code and
avoiding allocating enormous scratch arrays on the stack.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/wm8350-core.c b/drivers/mfd/wm8350-core.c
index dd1caaa..8a9b11c 100644
--- a/drivers/mfd/wm8350-core.c
+++ b/drivers/mfd/wm8350-core.c
@@ -20,6 +20,7 @@
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
+#include <linux/regmap.h>
#include <linux/workqueue.h>
#include <linux/mfd/wm8350/core.h>
@@ -74,7 +75,7 @@
int bytes = num_regs * 2;
dev_dbg(wm8350->dev, "volatile read\n");
- ret = wm8350->read_dev(wm8350, reg, bytes, (char *)dest);
+ ret = regmap_raw_read(wm8350->regmap, reg, dest, bytes);
for (i = reg; i < reg + num_regs; i++) {
/* Cache is CPU endian */
@@ -96,9 +97,6 @@
int ret = 0;
int bytes = num_regs * 2;
- if (wm8350->read_dev == NULL)
- return -ENODEV;
-
if ((reg + num_regs - 1) > WM8350_MAX_REGISTER) {
dev_err(wm8350->dev, "invalid reg %x\n",
reg + num_regs - 1);
@@ -149,9 +147,6 @@
int end = reg + num_regs;
int bytes = num_regs * 2;
- if (wm8350->write_dev == NULL)
- return -ENODEV;
-
if ((reg + num_regs - 1) > WM8350_MAX_REGISTER) {
dev_err(wm8350->dev, "invalid reg %x\n",
reg + num_regs - 1);
@@ -182,7 +177,7 @@
}
/* Actually write it out */
- return wm8350->write_dev(wm8350, reg, bytes, (char *)src);
+ return regmap_raw_write(wm8350->regmap, reg, src, bytes);
}
/*
@@ -515,9 +510,8 @@
* a PMIC so the device many not be in a virgin state and we
* can't rely on the silicon values.
*/
- ret = wm8350->read_dev(wm8350, 0,
- sizeof(u16) * (WM8350_MAX_REGISTER + 1),
- wm8350->reg_cache);
+ ret = regmap_raw_read(wm8350->regmap, 0, wm8350->reg_cache,
+ sizeof(u16) * (WM8350_MAX_REGISTER + 1));
if (ret < 0) {
dev_err(wm8350->dev,
"failed to read initial cache values\n");
@@ -570,35 +564,30 @@
struct wm8350_platform_data *pdata)
{
int ret;
- u16 id1, id2, mask_rev;
- u16 cust_id, mode, chip_rev;
+ unsigned int id1, id2, mask_rev;
+ unsigned int cust_id, mode, chip_rev;
dev_set_drvdata(wm8350->dev, wm8350);
/* get WM8350 revision and config mode */
- ret = wm8350->read_dev(wm8350, WM8350_RESET_ID, sizeof(id1), &id1);
+ ret = regmap_read(wm8350->regmap, WM8350_RESET_ID, &id1);
if (ret != 0) {
dev_err(wm8350->dev, "Failed to read ID: %d\n", ret);
goto err;
}
- ret = wm8350->read_dev(wm8350, WM8350_ID, sizeof(id2), &id2);
+ ret = regmap_read(wm8350->regmap, WM8350_ID, &id2);
if (ret != 0) {
dev_err(wm8350->dev, "Failed to read ID: %d\n", ret);
goto err;
}
- ret = wm8350->read_dev(wm8350, WM8350_REVISION, sizeof(mask_rev),
- &mask_rev);
+ ret = regmap_read(wm8350->regmap, WM8350_REVISION, &mask_rev);
if (ret != 0) {
dev_err(wm8350->dev, "Failed to read revision: %d\n", ret);
goto err;
}
- id1 = be16_to_cpu(id1);
- id2 = be16_to_cpu(id2);
- mask_rev = be16_to_cpu(mask_rev);
-
if (id1 != 0x6143) {
dev_err(wm8350->dev,
"Device with ID %x is not a WM8350\n", id1);