mx51: add support for pwm

This patch is adding support for pwm1 and pwm2 devices found
on mx51.
[ this patch has been tested with pwm-backlight driver ]

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

2 files changed, 8 insertions, 1 deletions

diff --git a/arch/arm/mach-mx5/clock-mx51-mx53.c b/arch/arm/mach-mx5/clock-mx51-mx53.c
index f1f45b63f455..ce4ffd769138 100644
--- a/arch/arm/mach-mx5/clock-mx51-mx53.c
+++ b/arch/arm/mach-mx5/clock-mx51-mx53.c
@@ -1191,6 +1191,11 @@ DEFINE_CLOCK(gpt_ipg_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG10_OFFSET,
 DEFINE_CLOCK(gpt_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG9_OFFSET,
         NULL,  NULL, &ipg_clk, &gpt_ipg_clk);
 
+DEFINE_CLOCK(pwm1_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG6_OFFSET,
+        NULL, NULL, &ipg_clk, NULL);
+DEFINE_CLOCK(pwm2_clk, 0, MXC_CCM_CCGR2, MXC_CCM_CCGRx_CG8_OFFSET,
+        NULL, NULL, &ipg_clk, NULL);
+
 /* I2C */
 DEFINE_CLOCK(i2c1_clk, 0, MXC_CCM_CCGR1, MXC_CCM_CCGRx_CG9_OFFSET,
         NULL, NULL, &ipg_clk, NULL);
@@ -1283,6 +1288,8 @@ static struct clk_lookup mx51_lookups[] = {
         _REGISTER_CLOCK("imx-uart.2", NULL, uart3_clk)
         _REGISTER_CLOCK(NULL, "gpt", gpt_clk)
         _REGISTER_CLOCK("fec.0", NULL, fec_clk)
+        _REGISTER_CLOCK("mxc_pwm.0", "pwm", pwm1_clk)
+        _REGISTER_CLOCK("mxc_pwm.1", "pwm", pwm2_clk)
         _REGISTER_CLOCK("imx-i2c.0", NULL, i2c1_clk)
         _REGISTER_CLOCK("imx-i2c.1", NULL, i2c2_clk)
         _REGISTER_CLOCK("imx-i2c.2", NULL, hsi2c_clk)
diff --git a/arch/arm/plat-mxc/pwm.c b/arch/arm/plat-mxc/pwm.c
index c36f2630ed93..7a61ef8f471a 100644
--- a/arch/arm/plat-mxc/pwm.c
+++ b/arch/arm/plat-mxc/pwm.c
@@ -57,7 +57,7 @@ int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns)
         if (pwm == NULL || period_ns == 0 || duty_ns > period_ns)
                 return -EINVAL;
 
-        if (cpu_is_mx27() || cpu_is_mx3() || cpu_is_mx25()) {
+        if (cpu_is_mx27() || cpu_is_mx3() || cpu_is_mx25() || cpu_is_mx51()) {
                 unsigned long long c;
                 unsigned long period_cycles, duty_cycles, prescale;
                 u32 cr;