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authorJuergen Beisert <jbe@pengutronix.de>2009-10-02 11:24:49 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2009-11-14 10:30:18 +0100
commit9e0afdf8f32f34f7e67db4d4622cb13e39a0e5db (patch)
tree73a1d4dec14f69c0c35780d94bf53776155c07ef /arch/arm/mach-mx3
parent060d20d32ae7c6a20a8eac465795ed5bc9b37f7c (diff)
MXC NFC: Add the clock resource to support NFC in i.MX35
Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/mach-mx3')
-rw-r--r--arch/arm/mach-mx3/clock-imx35.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/arm/mach-mx3/clock-imx35.c b/arch/arm/mach-mx3/clock-imx35.c
index c595260ec1f..33a23e7c7e9 100644
--- a/arch/arm/mach-mx3/clock-imx35.c
+++ b/arch/arm/mach-mx3/clock-imx35.c
@@ -387,6 +387,35 @@ DEFINE_CLOCK(csi_clk, 0, CCM_CGR3, 0, get_rate_csi, NULL);
DEFINE_CLOCK(iim_clk, 0, CCM_CGR3, 2, NULL, NULL);
DEFINE_CLOCK(gpu2d_clk, 0, CCM_CGR3, 4, NULL, NULL);
+static int clk_dummy_enable(struct clk *clk)
+{
+ return 0;
+}
+
+static void clk_dummy_disable(struct clk *clk)
+{
+}
+
+static unsigned long get_rate_nfc(struct clk *clk)
+{
+ unsigned long div1;
+
+ div1 = (__raw_readl(CCM_BASE + CCM_PDR4) >> 28) + 1;
+
+ return get_rate_ahb(NULL) / div1;
+}
+
+/* NAND Controller: It seems it can't be disabled */
+static struct clk nfc_clk = {
+ .id = 0,
+ .enable_reg = 0,
+ .enable_shift = 0,
+ .get_rate = get_rate_nfc,
+ .set_rate = NULL, /* set_rate_nfc, */
+ .enable = clk_dummy_enable,
+ .disable = clk_dummy_disable
+};
+
#define _REGISTER_CLOCK(d, n, c) \
{ \
.dev_id = d, \
@@ -449,6 +478,7 @@ static struct clk_lookup lookups[] = {
_REGISTER_CLOCK(NULL, "csi", csi_clk)
_REGISTER_CLOCK(NULL, "iim", iim_clk)
_REGISTER_CLOCK(NULL, "gpu2d", gpu2d_clk)
+ _REGISTER_CLOCK("mxc_nand.0", NULL, nfc_clk)
};
int __init mx35_clocks_init()