ARM: pxa: add clock for static memory controller

Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

3 files changed, 25 insertions, 3 deletions

diff --git a/arch/arm/mach-pxa/clock-pxa3xx.c b/arch/arm/mach-pxa/clock-pxa3xx.c
index 25be4adf6f42..1b08a34ab234 100644
--- a/arch/arm/mach-pxa/clock-pxa3xx.c
+++ b/arch/arm/mach-pxa/clock-pxa3xx.c
@@ -9,7 +9,9 @@
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
+#include <linux/io.h>
 
+#include <mach/smemc.h>
 #include <mach/pxa3xx-regs.h>
 
 #include "clock.h"
@@ -23,9 +25,6 @@
 #define ACCR_D0CS       (1 << 26)
 #define ACCR_PCCE       (1 << 11)
 
-/* crystal frequency to static memory controller multiplier (SMCFS) */
-static unsigned char smcfs_mult[8] = { 6, 0, 8, 0, 0, 16, };
-
 /* crystal frequency to HSIO bus frequency multiplier (HSS) */
 static unsigned char hss_mult[4] = { 8, 12, 16, 24 };
 
@@ -108,6 +107,20 @@ static unsigned long clk_pxa3xx_hsio_getrate(struct clk *clk)
         return hsio_clk;
 }
 
+/* crystal frequency to static memory controller multiplier (SMCFS) */
+static unsigned int smcfs_mult[8] = { 6, 0, 8, 0, 0, 16, };
+static unsigned int df_clkdiv[4] = { 1, 2, 4, 1 };
+
+static unsigned long clk_pxa3xx_smemc_getrate(struct clk *clk)
+{
+        unsigned long acsr = ACSR;
+        unsigned long memclkcfg = __raw_readl(MEMCLKCFG);
+        unsigned int smcfs = (acsr >> 23) & 0x7;
+
+        return BASE_CLK * smcfs_mult[(acsr >> 23) & 0x7] /
+                        df_clkdiv[(memclkcfg >> 16) & 0x3];
+}
+
 void clk_pxa3xx_cken_enable(struct clk *clk)
 {
         unsigned long mask = 1ul << (clk->cken & 0x1f);
@@ -145,6 +158,12 @@ const struct clkops clk_pxa3xx_ac97_ops = {
         .getrate        = clk_pxa3xx_ac97_getrate,
 };
 
+const struct clkops clk_pxa3xx_smemc_ops = {
+        .enable         = clk_pxa3xx_cken_enable,
+        .disable        = clk_pxa3xx_cken_disable,
+        .getrate        = clk_pxa3xx_smemc_getrate,
+};
+
 static void clk_pout_enable(struct clk *clk)
 {
         OSCC |= OSCC_PEN;
diff --git a/arch/arm/mach-pxa/clock.h b/arch/arm/mach-pxa/clock.h
index 3a607521dc21..6e949944f2ec 100644
--- a/arch/arm/mach-pxa/clock.h
+++ b/arch/arm/mach-pxa/clock.h
@@ -69,6 +69,7 @@ extern const struct clkops clk_pxa3xx_cken_ops;
 extern const struct clkops clk_pxa3xx_hsio_ops;
 extern const struct clkops clk_pxa3xx_ac97_ops;
 extern const struct clkops clk_pxa3xx_pout_ops;
+extern const struct clkops clk_pxa3xx_smemc_ops;
 
 extern void clk_pxa3xx_cken_enable(struct clk *);
 extern void clk_pxa3xx_cken_disable(struct clk *);
diff --git a/arch/arm/mach-pxa/pxa3xx.c b/arch/arm/mach-pxa/pxa3xx.c
index da3edcc9ac77..e14818f5d950 100644
--- a/arch/arm/mach-pxa/pxa3xx.c
+++ b/arch/arm/mach-pxa/pxa3xx.c
@@ -59,6 +59,7 @@ static DEFINE_PXA3_CKEN(pxa3xx_mmc1, MMC1, 19500000, 0);
 static DEFINE_PXA3_CKEN(pxa3xx_mmc2, MMC2, 19500000, 0);
 
 static DEFINE_CK(pxa3xx_lcd, LCD, &clk_pxa3xx_hsio_ops);
+static DEFINE_CK(pxa3xx_smemc, SMC, &clk_pxa3xx_smemc_ops);
 static DEFINE_CK(pxa3xx_camera, CAMERA, &clk_pxa3xx_hsio_ops);
 static DEFINE_CK(pxa3xx_ac97, AC97, &clk_pxa3xx_ac97_ops);
 static DEFINE_CLK(pxa3xx_pout, &clk_pxa3xx_pout_ops, 13000000, 70);
@@ -87,6 +88,7 @@ static struct clk_lookup pxa3xx_clkregs[] = {
         INIT_CLKREG(&clk_pxa3xx_pwm1, "pxa27x-pwm.1", NULL),
         INIT_CLKREG(&clk_pxa3xx_mmc1, "pxa2xx-mci.0", NULL),
         INIT_CLKREG(&clk_pxa3xx_mmc2, "pxa2xx-mci.1", NULL),
+        INIT_CLKREG(&clk_pxa3xx_smemc, "pxa2xx-pcmcia", NULL),
 };
 
 #ifdef CONFIG_PM