From: Felipe Balbi <balbi@ti.com>
To: Tony Lindgren <tony@atomide.com>
Cc: "Linux OMAP Mailing List" <linux-omap@vger.kernel.org>,
"Michael Büsch" <mb@bu3sch.de>, "Felipe Balbi" <balbi@ti.com>
Subject: [PATCH 09/22] cbus: tahvo: introduce __tahvo_(read/write)_reg
Date: Mon, 11 Jul 2011 14:17:22 +0300 [thread overview]
Message-ID: <1310383055-20211-10-git-send-email-balbi@ti.com> (raw)
In-Reply-To: <1310383055-20211-1-git-send-email-balbi@ti.com>
those two functions are local to tahvo.c and
should be used to read/write Tahvo's registers.
Signed-off-by: Felipe Balbi <balbi@ti.com>
---
drivers/cbus/tahvo.c | 56 +++++++++++++++++++++++++++++++++++--------------
1 files changed, 40 insertions(+), 16 deletions(-)
diff --git a/drivers/cbus/tahvo.c b/drivers/cbus/tahvo.c
index 740bb05..04b8203 100644
--- a/drivers/cbus/tahvo.c
+++ b/drivers/cbus/tahvo.c
@@ -67,6 +67,27 @@ int tahvo_get_status(void)
EXPORT_SYMBOL(tahvo_get_status);
/**
+ * __tahvo_read_reg - Reads a value from a register in Tahvo
+ * @tahvo: pointer to tahvo structure
+ * @reg: the register address to read from
+ */
+static int __tahvo_read_reg(struct tahvo *tahvo, unsigned reg)
+{
+ return cbus_read_reg(tahvo->dev, TAHVO_ID, reg);
+}
+
+/**
+ * __tahvo_write_reg - Writes a value to a register in Tahvo
+ * @tahvo: pointer to tahvo structure
+ * @reg: register address to write to
+ * @val: the value to be written to @reg
+ */
+static void __tahvo_write_reg(struct tahvo *tahvo, unsigned reg, u16 val)
+{
+ cbus_write_reg(tahvo->dev, TAHVO_ID, reg, val);
+}
+
+/**
* tahvo_read_reg - Read a value from a register in Tahvo
* @reg: the register to read from
*
@@ -76,7 +97,7 @@ int tahvo_read_reg(unsigned reg)
{
struct tahvo *tahvo = the_tahvo;
- return cbus_read_reg(tahvo->dev, TAHVO_ID, reg);
+ return __tahvo_read_reg(tahvo, reg);
}
EXPORT_SYMBOL(tahvo_read_reg);
@@ -91,7 +112,7 @@ void tahvo_write_reg(unsigned reg, u16 val)
{
struct tahvo *tahvo = the_tahvo;
- cbus_write_reg(tahvo->dev, TAHVO_ID, reg, val);
+ __tahvo_write_reg(tahvo, reg, val);
}
EXPORT_SYMBOL(tahvo_write_reg);
@@ -108,10 +129,10 @@ void tahvo_set_clear_reg_bits(unsigned reg, u16 set, u16 clear)
u16 w;
mutex_lock(&tahvo->mutex);
- w = tahvo_read_reg(reg);
+ w = __tahvo_read_reg(tahvo, reg);
w &= ~clear;
w |= set;
- tahvo_write_reg(reg, w);
+ __tahvo_write_reg(tahvo, reg, w);
mutex_unlock(&tahvo->mutex);
}
@@ -121,9 +142,9 @@ void tahvo_disable_irq(int id)
u16 mask;
mutex_lock(&tahvo->mutex);
- mask = tahvo_read_reg(TAHVO_REG_IMR);
+ mask = __tahvo_read_reg(tahvo, TAHVO_REG_IMR);
mask |= 1 << id;
- tahvo_write_reg(TAHVO_REG_IMR, mask);
+ __tahvo_write_reg(tahvo, TAHVO_REG_IMR, mask);
mutex_unlock(&tahvo->mutex);
}
EXPORT_SYMBOL(tahvo_disable_irq);
@@ -134,16 +155,18 @@ void tahvo_enable_irq(int id)
u16 mask;
mutex_lock(&tahvo->mutex);
- mask = tahvo_read_reg(TAHVO_REG_IMR);
+ mask = __tahvo_read_reg(tahvo, TAHVO_REG_IMR);
mask &= ~(1 << id);
- tahvo_write_reg(TAHVO_REG_IMR, mask);
+ __tahvo_write_reg(tahvo, TAHVO_REG_IMR, mask);
mutex_unlock(&tahvo->mutex);
}
EXPORT_SYMBOL(tahvo_enable_irq);
void tahvo_ack_irq(int id)
{
- tahvo_write_reg(TAHVO_REG_IDR, 1 << id);
+ struct tahvo *tahvo = the_tahvo;
+
+ __tahvo_write_reg(tahvo, TAHVO_REG_IDR, 1 << id);
}
EXPORT_SYMBOL(tahvo_ack_irq);
@@ -156,7 +179,7 @@ int tahvo_get_backlight_level(void)
mask = 0x7f;
else
mask = 0x0f;
- return tahvo_read_reg(TAHVO_REG_LEDPWMR) & mask;
+ return __tahvo_read_reg(tahvo, TAHVO_REG_LEDPWMR) & mask;
}
EXPORT_SYMBOL(tahvo_get_backlight_level);
@@ -173,12 +196,13 @@ EXPORT_SYMBOL(tahvo_get_max_backlight_level);
void tahvo_set_backlight_level(int level)
{
+ struct tahvo *tahvo = the_tahvo;
int max_level;
max_level = tahvo_get_max_backlight_level();
if (level > max_level)
level = max_level;
- tahvo_write_reg(TAHVO_REG_LEDPWMR, level);
+ __tahvo_write_reg(tahvo, TAHVO_REG_LEDPWMR, level);
}
EXPORT_SYMBOL(tahvo_set_backlight_level);
@@ -192,8 +216,8 @@ static irqreturn_t tahvo_irq_handler(int irq, void *_tahvo)
int i;
for (;;) {
- id = tahvo_read_reg(TAHVO_REG_IDR);
- im = ~tahvo_read_reg(TAHVO_REG_IMR);
+ id = __tahvo_read_reg(tahvo, TAHVO_REG_IDR);
+ im = ~__tahvo_read_reg(tahvo, TAHVO_REG_IMR);
id &= im;
if (!id)
@@ -299,7 +323,7 @@ static int __devinit tahvo_probe(struct platform_device *pdev)
mutex_init(&tahvo->mutex);
tahvo->dev = &pdev->dev;
- rev = tahvo_read_reg(TAHVO_REG_ASICR);
+ rev = __tahvo_read_reg(tahvo, TAHVO_REG_ASICR);
id = (rev >> 8) & 0xff;
@@ -325,7 +349,7 @@ static int __devinit tahvo_probe(struct platform_device *pdev)
irq = platform_get_irq(pdev, 0);
/* Mask all TAHVO interrupts */
- tahvo_write_reg(TAHVO_REG_IMR, 0xffff);
+ __tahvo_write_reg(tahvo, TAHVO_REG_IMR, 0xffff);
ret = request_threaded_irq(irq, NULL, tahvo_irq_handler,
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
@@ -352,7 +376,7 @@ static int __devexit tahvo_remove(struct platform_device *pdev)
irq = platform_get_irq(pdev, 0);
/* Mask all TAHVO interrupts */
- tahvo_write_reg(TAHVO_REG_IMR, 0xffff);
+ __tahvo_write_reg(tahvo, TAHVO_REG_IMR, 0xffff);
free_irq(irq, 0);
kfree(tahvo);
the_tahvo = NULL;
--
1.7.6
next prev parent reply other threads:[~2011-07-11 11:18 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-11 11:17 [PATCH 00/22] Tahvo cleanups and Retu optimization Felipe Balbi
2011-07-11 11:17 ` [PATCH 01/22] cbus: tahvo: convert spinlock into mutex Felipe Balbi
2011-07-11 11:17 ` [PATCH 02/22] cbus: tahvo: move to __devinit/__devexit sections Felipe Balbi
2011-07-11 11:17 ` [PATCH 03/22] cbus: tahvo: a switch looks better Felipe Balbi
2011-07-11 11:17 ` [PATCH 04/22] cbus: tahvo: don't go over 80 columns Felipe Balbi
2011-07-11 11:17 ` [PATCH 05/22] cbus: tahvo: drop the tasklet Felipe Balbi
2011-07-11 11:17 ` [PATCH 06/22] cbus: retu: set IRQF_ONESHOT flag Felipe Balbi
2011-07-11 11:17 ` [PATCH 07/22] cbus: tahvo: git it a context structure Felipe Balbi
2011-07-11 11:17 ` [PATCH 08/22] cbus: tahvo: pass tahvo to IRQ handler Felipe Balbi
2011-07-11 11:17 ` Felipe Balbi [this message]
2011-07-11 11:17 ` [PATCH 10/22] cbus: tahvo: drop some unneded defines Felipe Balbi
2011-07-11 11:17 ` [PATCH 11/22] cbus: retu: IRQ demux optimization Felipe Balbi
2011-07-11 11:17 ` [PATCH 12/22] cbus: tahvo: give it an irq_chip Felipe Balbi
2011-07-11 11:17 ` [PATCH 13/22] cbus: tahvo: start using irq_chip Felipe Balbi
2011-07-11 11:17 ` [PATCH 14/22] cbus: tahvo: usb: fix up to use threaded irqs Felipe Balbi
2011-07-11 11:17 ` [PATCH 15/22] cbus: tahvo drop the legacy interfaces Felipe Balbi
2011-07-11 11:17 ` [PATCH 16/22] cbus: tahvo: usb: drop unused variable Felipe Balbi
2011-07-11 11:17 ` [PATCH 17/22] cbus: tahvo: no need to mask interrupts on exit Felipe Balbi
2011-07-11 11:17 ` [PATCH 18/22] cbus: tahvo: drop the get_status hack Felipe Balbi
2011-07-11 11:17 ` [PATCH 19/22] cbus: tahvo: drop more unused interfaces Felipe Balbi
2011-07-11 11:17 ` [PATCH 20/22] cbus: tahvo: pass child device pointer Felipe Balbi
2011-07-11 11:17 ` [PATCH 21/22] cbus: tahvo: drop backlight interfaces Felipe Balbi
2011-07-11 11:17 ` [PATCH 22/22] cbus: tahvo: drop static global pointer Felipe Balbi
2011-07-11 11:28 ` [PATCH 00/22] Tahvo cleanups and Retu optimization Michael Büsch
2011-07-11 13:12 ` Felipe Balbi
2011-07-11 13:41 ` Michael Büsch
2011-07-11 13:45 ` Felipe Balbi
2011-07-11 13:51 ` Michael Büsch
2011-07-11 14:03 ` Felipe Balbi
2011-07-11 14:19 ` Michael Büsch
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