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authorHartley Sweeten <hartleys@visionengravers.com>2009-07-30 01:41:06 +0400
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-07-30 20:45:43 +0400
commitef12379f205bed7e92434e12ddd44e62d13bebe1 (patch)
treec372f5741826e7fbdaec8eac86191b52e3e621af /arch/arm/mach-ep93xx/clock.c
parent3aa7a9a3cf8774f6701b1903a6353f9545f561ce (diff)
downloadlinux-ef12379f205bed7e92434e12ddd44e62d13bebe1.tar.xz
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.c4
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),