mfd/rtc: s5m: Do not allocate RTC I2C dummy and regmap for unsupported chipsets

The rtc-s5m driver does not support all of S2M and S5M chipsets
supported by main MFD sec-core driver. For such chipsets unsupported by
rtc-s5m, the MFD sec-core driver initialized regmap with default config.
This config in such cases wouldn't work at all.

The main MFD sec-core driver shouldn't initialize regmap for child
drivers which is not used by them and even not valid.

Move the allocation of RTC I2C dummy device and initialization of RTC
regmap from main MFD sec-core driver to the rtc-s5m driver. The rtc-s5m
driver will use proper regmap config for supported devices.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

1 files changed, 1 insertions, 52 deletions

diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c
index 1cf27521fff4..d4682c6cbff5 100644
--- a/drivers/mfd/sec-core.c
+++ b/drivers/mfd/sec-core.c
@@ -25,7 +25,6 @@
 #include <linux/mfd/core.h>
 #include <linux/mfd/samsung/core.h>
 #include <linux/mfd/samsung/irq.h>
-#include <linux/mfd/samsung/rtc.h>
 #include <linux/mfd/samsung/s2mpa01.h>
 #include <linux/mfd/samsung/s2mps11.h>
 #include <linux/mfd/samsung/s2mps14.h>
@@ -196,20 +195,6 @@ static const struct regmap_config s5m8767_regmap_config = {
         .cache_type = REGCACHE_FLAT,
 };
 
-static const struct regmap_config s5m_rtc_regmap_config = {
-        .reg_bits = 8,
-        .val_bits = 8,
-
-        .max_register = SEC_RTC_REG_MAX,
-};
-
-static const struct regmap_config s2mps14_rtc_regmap_config = {
-        .reg_bits = 8,
-        .val_bits = 8,
-
-        .max_register = S2MPS_RTC_REG_MAX,
-};
-
 #ifdef CONFIG_OF
 /*
  * Only the common platform data elements for s5m8767 are parsed here from the
@@ -264,7 +249,7 @@ static int sec_pmic_probe(struct i2c_client *i2c,
                             const struct i2c_device_id *id)
 {
         struct sec_platform_data *pdata = dev_get_platdata(&i2c->dev);
-        const struct regmap_config *regmap, *regmap_rtc;
+        const struct regmap_config *regmap;
         struct sec_pmic_dev *sec_pmic;
         int ret;
 
@@ -298,39 +283,21 @@ static int sec_pmic_probe(struct i2c_client *i2c,
         switch (sec_pmic->device_type) {
         case S2MPA01:
                 regmap = &s2mpa01_regmap_config;
-                /*
-                 * The rtc-s5m driver does not support S2MPA01 and there
-                 * is no mfd_cell for S2MPA01 RTC device.
-                 * However we must pass something to devm_regmap_init_i2c()
-                 * so use S5M-like regmap config even though it wouldn't work.
-                 */
-                regmap_rtc = &s5m_rtc_regmap_config;
                 break;
         case S2MPS11X:
                 regmap = &s2mps11_regmap_config;
-                /*
-                 * The rtc-s5m driver does not support S2MPS11 and there
-                 * is no mfd_cell for S2MPS11 RTC device.
-                 * However we must pass something to devm_regmap_init_i2c()
-                 * so use S5M-like regmap config even though it wouldn't work.
-                 */
-                regmap_rtc = &s5m_rtc_regmap_config;
                 break;
         case S2MPS14X:
                 regmap = &s2mps14_regmap_config;
-                regmap_rtc = &s2mps14_rtc_regmap_config;
                 break;
         case S5M8763X:
                 regmap = &s5m8763_regmap_config;
-                regmap_rtc = &s5m_rtc_regmap_config;
                 break;
         case S5M8767X:
                 regmap = &s5m8767_regmap_config;
-                regmap_rtc = &s5m_rtc_regmap_config;
                 break;
         default:
                 regmap = &sec_regmap_config;
-                regmap_rtc = &s5m_rtc_regmap_config;
                 break;
         }
 
@@ -342,21 +309,6 @@ static int sec_pmic_probe(struct i2c_client *i2c,
                 return ret;
         }
 
-        sec_pmic->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
-        if (!sec_pmic->rtc) {
-                dev_err(&i2c->dev, "Failed to allocate I2C for RTC\n");
-                return -ENODEV;
-        }
-        i2c_set_clientdata(sec_pmic->rtc, sec_pmic);
-
-        sec_pmic->regmap_rtc = devm_regmap_init_i2c(sec_pmic->rtc, regmap_rtc);
-        if (IS_ERR(sec_pmic->regmap_rtc)) {
-                ret = PTR_ERR(sec_pmic->regmap_rtc);
-                dev_err(&i2c->dev, "Failed to allocate RTC register map: %d\n",
-                        ret);
-                goto err_regmap_rtc;
-        }
-
         if (pdata && pdata->cfg_pmic_irq)
                 pdata->cfg_pmic_irq();
 
@@ -403,8 +355,6 @@ static int sec_pmic_probe(struct i2c_client *i2c,
 
 err_mfd:
         sec_irq_exit(sec_pmic);
-err_regmap_rtc:
-        i2c_unregister_device(sec_pmic->rtc);
         return ret;
 }
 
@@ -414,7 +364,6 @@ static int sec_pmic_remove(struct i2c_client *i2c)
 
         mfd_remove_devices(sec_pmic->dev);
         sec_irq_exit(sec_pmic);
-        i2c_unregister_device(sec_pmic->rtc);
         return 0;
 }