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| author | Hartley Sweeten <hartleys@visionengravers.com> | 2009-07-29 22:41:06 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-07-30 17:45:43 +0100 |
| commit | ef12379f205bed7e92434e12ddd44e62d13bebe1 (patch) | |
| tree | c372f5741826e7fbdaec8eac86191b52e3e621af /arch/arm/mach-ep93xx/clock.c | |
| parent | 3aa7a9a3cf8774f6701b1903a6353f9545f561ce (diff) | |
| download | linux-ef12379f205bed7e92434e12ddd44e62d13bebe1.tar.gz linux-ef12379f205bed7e92434e12ddd44e62d13bebe1.tar.bz2 linux-ef12379f205bed7e92434e12ddd44e62d13bebe1.zip | |
ARM: 5628/1: ep93xx: Introduce Pulse Width Modulator (PWM) driver
The EP93xx features two PWMs (one on the EP9307) with the following
features:
* Configurable dual output
* Separate input clocks for each PWM output
* 16-bit resolution
* Programmable pulse width (duty cycle), interval (frequency), and
polarity
This adds the necessary core support as well as the driver. A sysfs
interface is provided to control the PWM outputs.
Signed-off-by: Matthieu Crapet <mcrapet@gmail.com>
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-ep93xx/clock.c')
| -rw-r--r-- | arch/arm/mach-ep93xx/clock.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/mach-ep93xx/clock.c b/arch/arm/mach-ep93xx/clock.c index b6b53447b1b4..3dd0e2a23095 100644 --- a/arch/arm/mach-ep93xx/clock.c +++ b/arch/arm/mach-ep93xx/clock.c @@ -72,6 +72,9 @@ static struct clk clk_keypad = { .enable_mask = EP93XX_SYSCON_KEYTCHCLKDIV_KEN, .set_rate = set_keytchclk_rate, }; +static struct clk clk_pwm = { + .rate = EP93XX_EXT_CLK_RATE, +}; /* DMA Clocks */ static struct clk clk_m2p0 = { @@ -137,6 +140,7 @@ static struct clk_lookup clocks[] = { INIT_CK(NULL, "pll2", &clk_pll2), INIT_CK("ep93xx-ohci", NULL, &clk_usb_host), INIT_CK("ep93xx-keypad", NULL, &clk_keypad), + INIT_CK(NULL, "pwm_clk", &clk_pwm), INIT_CK(NULL, "m2p0", &clk_m2p0), INIT_CK(NULL, "m2p1", &clk_m2p1), INIT_CK(NULL, "m2p2", &clk_m2p2), |