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From: Peter Ujfalusi <peter.ujfalusi@ti.com>
To: Mark Brown <broonie@opensource.wolfsonmicro.com>,
	Liam Girdwood <lrg@ti.com>, Tony Lindgren <tony@atomide.com>,
	Grant Likely <grant.likely@secretlab.ca>,
	Rob Herring <rob.herring@calxeda.com>
Cc: Tero Kristo <t-kristo@ti.com>,
	alsa-devel@alsa-project.org, linux-omap@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	devicetree-discuss@lists.ozlabs.org,
	Benoit Cousson <b-cousson@ti.com>,
	linux-kernel@vger.kernel.org
Subject: [PATCH v2 04/14] MFD: twl-core: Add API to query the HFCLK rate
Date: Tue, 14 Aug 2012 17:22:32 +0300	[thread overview]
Message-ID: <1344954162-7985-5-git-send-email-peter.ujfalusi@ti.com> (raw)
In-Reply-To: <1344954162-7985-1-git-send-email-peter.ujfalusi@ti.com>

CFG_BOOT register's HFCLK_FREQ field hold information about the used HFCLK
frequency.
Add possibility for users to get the configured rate based on this
register.
This register was configured during boot, without it the chip would not
operate correctly, so we can trust on this information.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
---
 drivers/mfd/twl-core.c  |   32 ++++++++++++++++++++++++++++++++
 include/linux/i2c/twl.h |    1 +
 2 files changed, 33 insertions(+), 0 deletions(-)

diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c
index 1c32afe..f162b68 100644
--- a/drivers/mfd/twl-core.c
+++ b/drivers/mfd/twl-core.c
@@ -552,6 +552,38 @@ int twl_get_version(void)
 }
 EXPORT_SYMBOL_GPL(twl_get_version);
 
+/**
+ * twl_get_hfclk_rate - API to get TWL external HFCLK clock rate.
+ *
+ * Api to get the TWL HFCLK rate based on BOOT_CFG register.
+ */
+int twl_get_hfclk_rate(void)
+{
+	u8 ctrl;
+	int rate;
+
+	twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &ctrl, R_CFG_BOOT);
+
+	switch (ctrl & 0x3) {
+	case HFCLK_FREQ_19p2_MHZ:
+		rate = 19200000;
+		break;
+	case HFCLK_FREQ_26_MHZ:
+		rate = 26000000;
+		break;
+	case HFCLK_FREQ_38p4_MHZ:
+		rate = 38400000;
+		break;
+	default:
+		pr_err("TWL4030: HFCLK is not configured\n");
+		rate = -EINVAL;
+		break;
+	}
+
+	return rate;
+}
+EXPORT_SYMBOL_GPL(twl_get_hfclk_rate);
+
 static struct device *
 add_numbered_child(unsigned chip, const char *name, int num,
 		void *pdata, unsigned pdata_len,
diff --git a/include/linux/i2c/twl.h b/include/linux/i2c/twl.h
index 7ea898c..ac6488c 100644
--- a/include/linux/i2c/twl.h
+++ b/include/linux/i2c/twl.h
@@ -188,6 +188,7 @@ int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes);
 
 int twl_get_type(void);
 int twl_get_version(void);
+int twl_get_hfclk_rate(void);
 
 int twl6030_interrupt_unmask(u8 bit_mask, u8 offset);
 int twl6030_interrupt_mask(u8 bit_mask, u8 offset);
-- 
1.7.8.6


WARNING: multiple messages have this Message-ID (diff)
From: Peter Ujfalusi <peter.ujfalusi-l0cyMroinI0@public.gmane.org>
To: Mark Brown
	<broonie-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org>,
	Liam Girdwood <lrg-l0cyMroinI0@public.gmane.org>,
	Tony Lindgren <tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>,
	Grant Likely
	<grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>,
	Rob Herring <rob.herring-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>
Cc: alsa-devel-K7yf7f+aM1XWsZ/bQMPhNw@public.gmane.org,
	devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Tero Kristo <t-kristo-l0cyMroinI0@public.gmane.org>,
	linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: [PATCH v2 04/14] MFD: twl-core: Add API to query the HFCLK rate
Date: Tue, 14 Aug 2012 17:22:32 +0300	[thread overview]
Message-ID: <1344954162-7985-5-git-send-email-peter.ujfalusi@ti.com> (raw)
In-Reply-To: <1344954162-7985-1-git-send-email-peter.ujfalusi-l0cyMroinI0@public.gmane.org>

CFG_BOOT register's HFCLK_FREQ field hold information about the used HFCLK
frequency.
Add possibility for users to get the configured rate based on this
register.
This register was configured during boot, without it the chip would not
operate correctly, so we can trust on this information.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi-l0cyMroinI0@public.gmane.org>
---
 drivers/mfd/twl-core.c  |   32 ++++++++++++++++++++++++++++++++
 include/linux/i2c/twl.h |    1 +
 2 files changed, 33 insertions(+), 0 deletions(-)

diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c
index 1c32afe..f162b68 100644
--- a/drivers/mfd/twl-core.c
+++ b/drivers/mfd/twl-core.c
@@ -552,6 +552,38 @@ int twl_get_version(void)
 }
 EXPORT_SYMBOL_GPL(twl_get_version);
 
+/**
+ * twl_get_hfclk_rate - API to get TWL external HFCLK clock rate.
+ *
+ * Api to get the TWL HFCLK rate based on BOOT_CFG register.
+ */
+int twl_get_hfclk_rate(void)
+{
+	u8 ctrl;
+	int rate;
+
+	twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &ctrl, R_CFG_BOOT);
+
+	switch (ctrl & 0x3) {
+	case HFCLK_FREQ_19p2_MHZ:
+		rate = 19200000;
+		break;
+	case HFCLK_FREQ_26_MHZ:
+		rate = 26000000;
+		break;
+	case HFCLK_FREQ_38p4_MHZ:
+		rate = 38400000;
+		break;
+	default:
+		pr_err("TWL4030: HFCLK is not configured\n");
+		rate = -EINVAL;
+		break;
+	}
+
+	return rate;
+}
+EXPORT_SYMBOL_GPL(twl_get_hfclk_rate);
+
 static struct device *
 add_numbered_child(unsigned chip, const char *name, int num,
 		void *pdata, unsigned pdata_len,
diff --git a/include/linux/i2c/twl.h b/include/linux/i2c/twl.h
index 7ea898c..ac6488c 100644
--- a/include/linux/i2c/twl.h
+++ b/include/linux/i2c/twl.h
@@ -188,6 +188,7 @@ int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes);
 
 int twl_get_type(void);
 int twl_get_version(void);
+int twl_get_hfclk_rate(void);
 
 int twl6030_interrupt_unmask(u8 bit_mask, u8 offset);
 int twl6030_interrupt_mask(u8 bit_mask, u8 offset);
-- 
1.7.8.6

WARNING: multiple messages have this Message-ID (diff)
From: peter.ujfalusi@ti.com (Peter Ujfalusi)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 04/14] MFD: twl-core: Add API to query the HFCLK rate
Date: Tue, 14 Aug 2012 17:22:32 +0300	[thread overview]
Message-ID: <1344954162-7985-5-git-send-email-peter.ujfalusi@ti.com> (raw)
In-Reply-To: <1344954162-7985-1-git-send-email-peter.ujfalusi@ti.com>

CFG_BOOT register's HFCLK_FREQ field hold information about the used HFCLK
frequency.
Add possibility for users to get the configured rate based on this
register.
This register was configured during boot, without it the chip would not
operate correctly, so we can trust on this information.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
---
 drivers/mfd/twl-core.c  |   32 ++++++++++++++++++++++++++++++++
 include/linux/i2c/twl.h |    1 +
 2 files changed, 33 insertions(+), 0 deletions(-)

diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c
index 1c32afe..f162b68 100644
--- a/drivers/mfd/twl-core.c
+++ b/drivers/mfd/twl-core.c
@@ -552,6 +552,38 @@ int twl_get_version(void)
 }
 EXPORT_SYMBOL_GPL(twl_get_version);
 
+/**
+ * twl_get_hfclk_rate - API to get TWL external HFCLK clock rate.
+ *
+ * Api to get the TWL HFCLK rate based on BOOT_CFG register.
+ */
+int twl_get_hfclk_rate(void)
+{
+	u8 ctrl;
+	int rate;
+
+	twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &ctrl, R_CFG_BOOT);
+
+	switch (ctrl & 0x3) {
+	case HFCLK_FREQ_19p2_MHZ:
+		rate = 19200000;
+		break;
+	case HFCLK_FREQ_26_MHZ:
+		rate = 26000000;
+		break;
+	case HFCLK_FREQ_38p4_MHZ:
+		rate = 38400000;
+		break;
+	default:
+		pr_err("TWL4030: HFCLK is not configured\n");
+		rate = -EINVAL;
+		break;
+	}
+
+	return rate;
+}
+EXPORT_SYMBOL_GPL(twl_get_hfclk_rate);
+
 static struct device *
 add_numbered_child(unsigned chip, const char *name, int num,
 		void *pdata, unsigned pdata_len,
diff --git a/include/linux/i2c/twl.h b/include/linux/i2c/twl.h
index 7ea898c..ac6488c 100644
--- a/include/linux/i2c/twl.h
+++ b/include/linux/i2c/twl.h
@@ -188,6 +188,7 @@ int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes);
 
 int twl_get_type(void);
 int twl_get_version(void);
+int twl_get_hfclk_rate(void);
 
 int twl6030_interrupt_unmask(u8 bit_mask, u8 offset);
 int twl6030_interrupt_mask(u8 bit_mask, u8 offset);
-- 
1.7.8.6

  parent reply	other threads:[~2012-08-14 14:22 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-08-14 14:22 [PATCH v2 00/14] MFD/ASoC/Input: twl4030-audio submodule DT support Peter Ujfalusi
2012-08-14 14:22 ` Peter Ujfalusi
2012-08-14 14:22 ` [PATCH v2 01/14] MFD: twl4030-audio: Clean up MODULE_* and platform_driver part Peter Ujfalusi
2012-08-14 14:22   ` Peter Ujfalusi
2012-08-14 14:22   ` Peter Ujfalusi
2012-08-14 14:22 ` [PATCH v2 02/14] MFD: twl4030-audio: Convert to use devm_kzalloc Peter Ujfalusi
2012-08-14 14:22   ` Peter Ujfalusi
2012-08-14 14:22   ` Peter Ujfalusi
2012-08-28  9:50   ` Tero Kristo
2012-08-28  9:50     ` Tero Kristo
2012-08-28  9:50     ` Tero Kristo
2012-08-28 16:48     ` Mark Brown
2012-08-28 16:48       ` Mark Brown
2012-08-28 16:48       ` Mark Brown
2012-08-30  9:19     ` Peter Ujfalusi
2012-08-30  9:19       ` Peter Ujfalusi
2012-08-14 14:22 ` [PATCH v2 03/14] MFD: twl4030-audio: Rearange and clean-up the probe function Peter Ujfalusi
2012-08-14 14:22   ` Peter Ujfalusi
2012-08-14 14:22   ` Peter Ujfalusi
2012-08-14 14:22 ` Peter Ujfalusi [this message]
2012-08-14 14:22   ` [PATCH v2 04/14] MFD: twl-core: Add API to query the HFCLK rate Peter Ujfalusi
2012-08-14 14:22   ` Peter Ujfalusi
2012-08-14 14:22 ` [PATCH v2 05/14] MFD: twl4030-audio: Get audio MCLK via twl-core API instead of pdata Peter Ujfalusi
2012-08-14 14:22   ` Peter Ujfalusi
2012-08-14 14:22   ` Peter Ujfalusi
2012-08-14 14:22 ` [PATCH v2 06/14] dt: Add empty of_find_node_by_name() function Peter Ujfalusi
2012-08-14 14:22   ` Peter Ujfalusi
2012-08-14 14:22   ` Peter Ujfalusi
2012-08-14 14:22 ` [PATCH v2 07/14] MFD: twl4030-audio: Add DT support Peter Ujfalusi
2012-08-14 14:22   ` Peter Ujfalusi
2012-08-14 14:22 ` [PATCH v2 08/14] Input: twl4030-vibra: Support for DT booted kernel Peter Ujfalusi
2012-08-14 14:22   ` Peter Ujfalusi
2012-08-14 14:22 ` [PATCH v2 09/14] ASoC: twl4030: Move hs_extmute GPIO handling to driver Peter Ujfalusi
2012-08-14 14:22   ` Peter Ujfalusi
2012-08-14 14:22   ` Peter Ujfalusi
2012-08-14 14:22 ` [PATCH v2 10/14] ARM: OMAP/ASoC: Zoom2: Let the codec to handle the hs_extmute GPIO Peter Ujfalusi
2012-08-14 14:22   ` Peter Ujfalusi
2012-08-14 14:22 ` [PATCH v2 11/14] ASoC/MFD: twl4030: Remove set_hs_extmute callback from platform data Peter Ujfalusi
2012-08-14 14:22   ` Peter Ujfalusi
2012-08-14 14:22 ` [PATCH v2 12/14] ASoC: twl4030: Convert to use devm_kzalloc Peter Ujfalusi
2012-08-14 14:22   ` Peter Ujfalusi
2012-08-14 14:22   ` Peter Ujfalusi
2012-08-14 14:22 ` [PATCH v2 13/14] ASoC: twl4030: Add pointer to pdata within the private data Peter Ujfalusi
2012-08-14 14:22   ` Peter Ujfalusi
2012-08-14 14:22   ` Peter Ujfalusi
2012-08-14 14:22 ` [PATCH v2 14/14] ASoC: twl4030: Support for DT booted kernel Peter Ujfalusi
2012-08-14 14:22   ` Peter Ujfalusi
2012-08-28  9:51 ` [PATCH v2 00/14] MFD/ASoC/Input: twl4030-audio submodule DT support Tero Kristo
2012-08-28  9:51   ` Tero Kristo
2012-08-28  9:51   ` Tero Kristo

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