[U-Boot] [PATCH v1 3/4] i.MX6: add enable_spi_clk()

[Heiko Schocher]

add enable_spi_clk(), so board code can enable spi clocks.

Signed-off-by: Heiko Schocher <hs at denx.de>
Cc: Eric Nelson <eric.nelson at boundarydevices.com>
Cc: Stefano Babic <sbabic at denx.de>
---
 arch/arm/cpu/armv7/mx6/clock.c        | 17 +++++++++++++++++
 arch/arm/include/asm/arch-mx6/clock.h |  1 +
 2 files changed, 18 insertions(+)

diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c
index bd65a08..4735368 100644
--- a/arch/arm/cpu/armv7/mx6/clock.c
+++ b/arch/arm/cpu/armv7/mx6/clock.c
@@ -71,6 +71,23 @@ int enable_i2c_clk(unsigned char enable, unsigned i2c_num)
 }
 #endif
 
+int enable_spi_clk(unsigned char enable, unsigned spi_num)
+{
+	u32 reg;
+	u32 mask;
+
+	if (spi_num > 3)
+		return -EINVAL;
+
+	mask = MXC_CCM_CCGR_CG_MASK << (spi_num << 1);
+	reg = __raw_readl(&imx_ccm->CCGR1);
+	if (enable)
+		reg |= mask;
+	else
+		reg &= ~mask;
+	__raw_writel(reg, &imx_ccm->CCGR1);
+	return 0;
+}
 static u32 decode_pll(enum pll_clocks pll, u32 infreq)
 {
 	u32 div;
diff --git a/arch/arm/include/asm/arch-mx6/clock.h b/arch/arm/include/asm/arch-mx6/clock.h
index 1b4ded7..339c789 100644
--- a/arch/arm/include/asm/arch-mx6/clock.h
+++ b/arch/arm/include/asm/arch-mx6/clock.h
@@ -57,6 +57,7 @@ void enable_usboh3_clk(unsigned char enable);
 int enable_sata_clock(void);
 int enable_pcie_clock(void);
 int enable_i2c_clk(unsigned char enable, unsigned i2c_num);
+int enable_spi_clk(unsigned char enable, unsigned spi_num);
 void enable_ipu_clock(void);
 int enable_fec_anatop_clock(enum enet_freq freq);
 #endif /* __ASM_ARCH_CLOCK_H */
-- 
1.8.3.1