[PATCH v3 0/3] mfd: twl: Add clock for TWL6030

[PATCH v3 0/3] mfd: twl: Add clock for TWL6030

[Andreas Kemnade]

Previously the clock support for only implemented for TWL6032 so add
it also for the TWL6030. There are devices out there where especially
WLAN only works if these clocks are enabled by some patched U-Boot.
This allows to explicitly specify the clock requirements.

Changes in V3:
- use type enum in driver_data and twl_clock_info
- revert back to store device instead of platform_device

Changes in V2:
- cleanup some defines
- no separate ops for 6030
- remove is_prepared()
- update Kconfig

Andreas Kemnade (3):
  mfd: twl-core: Add a clock subdevice for the TWL6030
  clk: twl: remove is_prepared
  clk: twl: add TWL6030 support

 drivers/clk/Kconfig    |  2 +-
 drivers/clk/clk-twl.c  | 69 ++++++++++++++++++++++++++----------------
 drivers/mfd/twl-core.c | 32 ++++++++++++++------
 3 files changed, 66 insertions(+), 37 deletions(-)

-- 
2.39.5

[PATCH v3 1/3] mfd: twl-core: Add a clock subdevice for the TWL6030

[Andreas Kemnade]

Also the TWL6030 has some clocks, so add a subdevice for that.

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
---
 drivers/mfd/twl-core.c | 32 ++++++++++++++++++++++----------
 1 file changed, 22 insertions(+), 10 deletions(-)

diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c
index c130ffef182f..c981922f62d5 100644
--- a/drivers/mfd/twl-core.c
+++ b/drivers/mfd/twl-core.c
@@ -711,6 +711,10 @@ static struct of_dev_auxdata twl_auxdata_lookup[] = {
 	{ /* sentinel */ },
 };
 
+static const struct mfd_cell twl6030_cells[] = {
+	{ .name = "twl6030-clk" },
+};
+
 static const struct mfd_cell twl6032_cells[] = {
 	{ .name = "twl6032-clk" },
 };
@@ -861,17 +865,25 @@ twl_probe(struct i2c_client *client)
 				 TWL4030_DCDC_GLOBAL_CFG);
 	}
 
-	if (id->driver_data == (TWL6030_CLASS | TWL6032_SUBCLASS)) {
-		status = devm_mfd_add_devices(&client->dev,
-					      PLATFORM_DEVID_NONE,
-					      twl6032_cells,
-					      ARRAY_SIZE(twl6032_cells),
-					      NULL, 0, NULL);
-		if (status < 0)
-			goto free;
-	}
-
 	if (twl_class_is_6030()) {
+		if (id->driver_data & TWL6032_SUBCLASS) {
+			status = devm_mfd_add_devices(&client->dev,
+						      PLATFORM_DEVID_NONE,
+						      twl6032_cells,
+						      ARRAY_SIZE(twl6032_cells),
+						      NULL, 0, NULL);
+			if (status < 0)
+				goto free;
+		} else {
+			status = devm_mfd_add_devices(&client->dev,
+						      PLATFORM_DEVID_NONE,
+						      twl6030_cells,
+						      ARRAY_SIZE(twl6030_cells),
+						      NULL, 0, NULL);
+			if (status < 0)
+				goto free;
+		}
+
 		if (of_device_is_system_power_controller(node)) {
 			if (!pm_power_off)
 				pm_power_off = twl6030_power_off;
-- 
2.39.5

[PATCH v3 2/3] clk: twl: remove is_prepared

[Andreas Kemnade]

Remove is_prepared to simplify adding of TWL6030 support.
The default implementation should be enough.

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
---
 drivers/clk/clk-twl.c | 17 -----------------
 1 file changed, 17 deletions(-)

diff --git a/drivers/clk/clk-twl.c b/drivers/clk/clk-twl.c
index eab9d3c8ed8a..1d684b358401 100644
--- a/drivers/clk/clk-twl.c
+++ b/drivers/clk/clk-twl.c
@@ -77,26 +77,9 @@ static void twl6032_clks_unprepare(struct clk_hw *hw)
 		dev_err(cinfo->dev, "clk unprepare failed\n");
 }
 
-static int twl6032_clks_is_prepared(struct clk_hw *hw)
-{
-	struct twl_clock_info *cinfo = to_twl_clks_info(hw);
-	int val;
-
-	val = twlclk_read(cinfo, TWL_MODULE_PM_RECEIVER, VREG_STATE);
-	if (val < 0) {
-		dev_err(cinfo->dev, "clk read failed\n");
-		return val;
-	}
-
-	val &= TWL6030_CFG_STATE_MASK;
-
-	return val == TWL6030_CFG_STATE_ON;
-}
-
 static const struct clk_ops twl6032_clks_ops = {
 	.prepare	= twl6032_clks_prepare,
 	.unprepare	= twl6032_clks_unprepare,
-	.is_prepared	= twl6032_clks_is_prepared,
 	.recalc_rate	= twl_clks_recalc_rate,
 };
 
-- 
2.39.5

[PATCH v3 3/3] clk: twl: add TWL6030 support

[Andreas Kemnade]

The TWL6030 has similar clocks, so add support for it. Take care of the
resource grouping handling needed.

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
---
 drivers/clk/Kconfig   |  2 +-
 drivers/clk/clk-twl.c | 52 +++++++++++++++++++++++++++++++++++--------
 2 files changed, 44 insertions(+), 10 deletions(-)

diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 299bc678ed1b..82ec12f9b82c 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -291,7 +291,7 @@ config CLK_TWL
 	help
 	  Enable support for controlling the clock resources on TWL family
 	  PMICs. These devices have some 32K clock outputs which can be
-	  controlled by software. For now, only the TWL6032 clocks are
+	  controlled by software. For now, the TWL6032 and TWL6030 clocks are
 	  supported.
 
 config CLK_TWL6040
diff --git a/drivers/clk/clk-twl.c b/drivers/clk/clk-twl.c
index 1d684b358401..c04bcb61e260 100644
--- a/drivers/clk/clk-twl.c
+++ b/drivers/clk/clk-twl.c
@@ -11,13 +11,29 @@
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 
-#define VREG_STATE              2
+#define VREG_STATE		2
+#define VREG_GRP		0
 #define TWL6030_CFG_STATE_OFF   0x00
 #define TWL6030_CFG_STATE_ON    0x01
 #define TWL6030_CFG_STATE_MASK  0x03
+#define TWL6030_CFG_STATE_GRP_SHIFT	5
+#define TWL6030_CFG_STATE_APP_SHIFT	2
+#define TWL6030_CFG_STATE_APP_MASK	(0x03 << TWL6030_CFG_STATE_APP_SHIFT)
+#define TWL6030_CFG_STATE_APP(v)	(((v) & TWL6030_CFG_STATE_APP_MASK) >>\
+						TWL6030_CFG_STATE_APP_SHIFT)
+#define P1_GRP BIT(0) /* processor power group */
+#define P2_GRP BIT(1)
+#define P3_GRP BIT(2)
+#define ALL_GRP (P1_GRP | P2_GRP | P3_GRP)
+
+enum twl_type {
+	TWL_TYPE_6030,
+	TWL_TYPE_6032,
+};
 
 struct twl_clock_info {
 	struct device *dev;
+	enum twl_type type;
 	u8 base;
 	struct clk_hw hw;
 };
@@ -56,14 +72,21 @@ static unsigned long twl_clks_recalc_rate(struct clk_hw *hw,
 static int twl6032_clks_prepare(struct clk_hw *hw)
 {
 	struct twl_clock_info *cinfo = to_twl_clks_info(hw);
-	int ret;
 
-	ret = twlclk_write(cinfo, TWL_MODULE_PM_RECEIVER, VREG_STATE,
-			   TWL6030_CFG_STATE_ON);
-	if (ret < 0)
-		dev_err(cinfo->dev, "clk prepare failed\n");
+	if (cinfo->type == TWL_TYPE_6030) {
+		int grp;
+
+		grp = twlclk_read(cinfo, TWL_MODULE_PM_RECEIVER, VREG_GRP);
+		if (grp < 0)
+			return grp;
 
-	return ret;
+		return twlclk_write(cinfo, TWL_MODULE_PM_RECEIVER, VREG_STATE,
+				    grp << TWL6030_CFG_STATE_GRP_SHIFT |
+				    TWL6030_CFG_STATE_ON);
+	}
+
+	return twlclk_write(cinfo, TWL_MODULE_PM_RECEIVER, VREG_STATE,
+			    TWL6030_CFG_STATE_ON);
 }
 
 static void twl6032_clks_unprepare(struct clk_hw *hw)
@@ -71,8 +94,14 @@ static void twl6032_clks_unprepare(struct clk_hw *hw)
 	struct twl_clock_info *cinfo = to_twl_clks_info(hw);
 	int ret;
 
-	ret = twlclk_write(cinfo, TWL_MODULE_PM_RECEIVER, VREG_STATE,
-			   TWL6030_CFG_STATE_OFF);
+	if (cinfo->type == TWL_TYPE_6032)
+		ret = twlclk_write(cinfo, TWL_MODULE_PM_RECEIVER, VREG_STATE,
+				   ALL_GRP << TWL6030_CFG_STATE_GRP_SHIFT |
+				   TWL6030_CFG_STATE_OFF);
+	else
+		ret = twlclk_write(cinfo, TWL_MODULE_PM_RECEIVER, VREG_STATE,
+				   TWL6030_CFG_STATE_OFF);
+
 	if (ret < 0)
 		dev_err(cinfo->dev, "clk unprepare failed\n");
 }
@@ -138,6 +167,7 @@ static int twl_clks_probe(struct platform_device *pdev)
 	for (i = 0; i < count; i++) {
 		cinfo[i].base = hw_data[i].base;
 		cinfo[i].dev = &pdev->dev;
+		cinfo[i].type = platform_get_device_id(pdev)->driver_data;
 		cinfo[i].hw.init = &hw_data[i].init;
 		ret = devm_clk_hw_register(&pdev->dev, &cinfo[i].hw);
 		if (ret) {
@@ -159,7 +189,11 @@ static int twl_clks_probe(struct platform_device *pdev)
 
 static const struct platform_device_id twl_clks_id[] = {
 	{
+		.name = "twl6030-clk",
+		.driver_data = TWL_TYPE_6030,
+	}, {
 		.name = "twl6032-clk",
+		.driver_data = TWL_TYPE_6032,
 	}, {
 		/* sentinel */
 	}
-- 
2.39.5