i.MX25: implement secondary clocks for uarts and fec

For uarts and fec need two clocks, implement it using the secondary clock
field in struct clk.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch/arm/mach-mx25/clock.c

@@ -157,14 +157,16 @@ static void clk_cgcr_disable(struct clk *clk)
 	}
 
 DEFINE_CLOCK(gpt_clk,    0, CCM_CGCR0,  5, get_rate_ipg, NULL, NULL);
+DEFINE_CLOCK(uart_per_clk, 0, CCM_CGCR0, 15, get_rate_uart, NULL, NULL);
 DEFINE_CLOCK(cspi1_clk,  0, CCM_CGCR1,  5, get_rate_ipg, NULL, NULL);
 DEFINE_CLOCK(cspi2_clk,  0, CCM_CGCR1,  6, get_rate_ipg, NULL, NULL);
 DEFINE_CLOCK(cspi3_clk,  0, CCM_CGCR1,  7, get_rate_ipg, NULL, NULL);
-DEFINE_CLOCK(uart1_clk,  0, CCM_CGCR2, 14, get_rate_uart, NULL, NULL);
-DEFINE_CLOCK(uart2_clk,  0, CCM_CGCR2, 15, get_rate_uart, NULL, NULL);
-DEFINE_CLOCK(uart3_clk,  0, CCM_CGCR2, 16, get_rate_uart, NULL, NULL);
-DEFINE_CLOCK(uart4_clk,  0, CCM_CGCR2, 17, get_rate_uart, NULL, NULL);
-DEFINE_CLOCK(uart5_clk,  0, CCM_CGCR2, 18, get_rate_uart, NULL, NULL);
+DEFINE_CLOCK(fec_ipg_clk, 0, CCM_CGCR1, 15, get_rate_ipg, NULL, NULL);
+DEFINE_CLOCK(uart1_clk,  0, CCM_CGCR2, 14, get_rate_uart, NULL, &uart_per_clk);
+DEFINE_CLOCK(uart2_clk,  0, CCM_CGCR2, 15, get_rate_uart, NULL, &uart_per_clk);
+DEFINE_CLOCK(uart3_clk,  0, CCM_CGCR2, 16, get_rate_uart, NULL, &uart_per_clk);
+DEFINE_CLOCK(uart4_clk,  0, CCM_CGCR2, 17, get_rate_uart, NULL, &uart_per_clk);
+DEFINE_CLOCK(uart5_clk,  0, CCM_CGCR2, 18, get_rate_uart, NULL, &uart_per_clk);
 DEFINE_CLOCK(nfc_clk,    0, CCM_CGCR0,  8, get_rate_nfc, NULL, NULL);
 DEFINE_CLOCK(usbotg_clk, 0, CCM_CGCR0, 28, get_rate_otg, NULL, NULL);
 DEFINE_CLOCK(pwm1_clk,	 0, CCM_CGCR1, 31, get_rate_ipg, NULL, NULL);
@@ -174,7 +176,7 @@ DEFINE_CLOCK(pwm4_clk,	 0, CCM_CGCR2,  2, get_rate_ipg, NULL, NULL);
 DEFINE_CLOCK(kpp_clk,	 0, CCM_CGCR1, 28, get_rate_ipg, NULL, NULL);
 DEFINE_CLOCK(tsc_clk,	 0, CCM_CGCR2, 13, get_rate_ipg, NULL, NULL);
 DEFINE_CLOCK(i2c_clk,	 0, CCM_CGCR0,  6, get_rate_i2c, NULL, NULL);
-DEFINE_CLOCK(fec_clk,	 0, CCM_CGCR0, 23, get_rate_ipg, NULL, NULL);
+DEFINE_CLOCK(fec_clk,	 0, CCM_CGCR0, 23, get_rate_ipg, NULL, &fec_ipg_clk);
 
 #define _REGISTER_CLOCK(d, n, c)	\
 	{				\