From: Juergen Beisert <jbe@pengutronix.de>
Date: Fri, 2 Oct 2009 09:24:49 +0000 (+0200)
Subject: MXC NFC: Add the clock resource to support NFC in i.MX35
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=9e0afdf8f32f34f7e67db4d4622cb13e39a0e5db;p=openwrt%2Fstaging%2Fblogic.git

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>
---

diff --git a/arch/arm/mach-mx3/clock-imx35.c b/arch/arm/mach-mx3/clock-imx35.c
index c595260ec1f9..33a23e7c7e92 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()