[U-Boot] [PATCH 08/14] sun6i: Add a sigma_delta_enable paramter to clock_set_pll5()

Hans de Goede
2014-12-16T20:31:33Z

The sun8i dram code sometimes wants to enable sigma delta mode,
add a parameter to allow this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
arch/arm/cpu/armv7/sunxi/clock_sun6i.c | 9 +++++++--
arch/arm/cpu/armv7/sunxi/dram_sun6i.c | 2 +-
arch/arm/include/asm/arch-sunxi/clock.h | 1 -
arch/arm/include/asm/arch-sunxi/clock_sun6i.h | 5 +++++
4 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/arch/arm/cpu/armv7/sunxi/clock_sun6i.c b/arch/arm/cpu/armv7/sunxi/clock_sun6i.c
index 8e949c6..193e314 100644
--- a/arch/arm/cpu/armv7/sunxi/clock_sun6i.c
+++ b/arch/arm/cpu/armv7/sunxi/clock_sun6i.c
@@ -144,15 +144,20 @@ void clock_set_pll3(unsigned int clk)
&ccm->pll3_cfg);
}

-void clock_set_pll5(unsigned int clk)
+void clock_set_pll5(unsigned int clk, bool sigma_delta_enable)
{
struct sunxi_ccm_reg * const ccm =
(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
const int k = 2;
const int m = 1;

+ if (sigma_delta_enable)
+ writel(CCM_PLL5_PATTERN, &ccm->pll5_pattern_cfg);
+
/* PLL5 rate = 24000000 * n * k / m */
- writel(CCM_PLL5_CTRL_EN | CCM_PLL5_CTRL_UPD |
+ writel(CCM_PLL5_CTRL_EN |
+ (sigma_delta_enable ? CCM_PLL5_CTRL_SIGMA_DELTA_EN : 0) |
+ CCM_PLL5_CTRL_UPD |
CCM_PLL5_CTRL_N(clk / (24000000 * k / m)) |
CCM_PLL5_CTRL_K(k) | CCM_PLL5_CTRL_M(m), &ccm->pll5_cfg);

diff --git a/arch/arm/cpu/armv7/sunxi/dram_sun6i.c b/arch/arm/cpu/armv7/sunxi/dram_sun6i.c
index 61bb8d4..bc6428a 100644
--- a/arch/arm/cpu/armv7/sunxi/dram_sun6i.c
+++ b/arch/arm/cpu/armv7/sunxi/dram_sun6i.c
@@ -46,7 +46,7 @@ static void mctl_sys_init(void)
(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
const int dram_clk_div = 2;

- clock_set_pll5(DRAM_CLK * dram_clk_div);
+ clock_set_pll5(DRAM_CLK * dram_clk_div, false);

clrsetbits_le32(&ccm->dram_clk_cfg, CCM_DRAMCLK_CFG_DIV0_MASK,
CCM_DRAMCLK_CFG_DIV0(dram_clk_div) | CCM_DRAMCLK_CFG_RST |
diff --git a/arch/arm/include/asm/arch-sunxi/clock.h b/arch/arm/include/asm/arch-sunxi/clock.h
index 64acff3..505c363 100644
--- a/arch/arm/include/asm/arch-sunxi/clock.h
+++ b/arch/arm/include/asm/arch-sunxi/clock.h
@@ -26,7 +26,6 @@ int clock_init(void);
int clock_twi_onoff(int port, int state);
void clock_set_pll1(unsigned int hz);
void clock_set_pll3(unsigned int hz);
-void clock_set_pll5(unsigned int hz);
unsigned int clock_get_pll5p(void);
unsigned int clock_get_pll6(void);
void clock_set_de_mod_clock(u32 *clk_cfg, unsigned int hz);
diff --git a/arch/arm/include/asm/arch-sunxi/clock_sun6i.h b/arch/arm/include/asm/arch-sunxi/clock_sun6i.h
index 3d4fcd1..f807af3 100644
--- a/arch/arm/include/asm/arch-sunxi/clock_sun6i.h
+++ b/arch/arm/include/asm/arch-sunxi/clock_sun6i.h
@@ -185,6 +185,7 @@ struct sunxi_ccm_reg {
#define CCM_PLL5_CTRL_K(n) ((((n) - 1) & 0x3) << 4)
#define CCM_PLL5_CTRL_N(n) ((((n) - 1) & 0x1f) << 8)
#define CCM_PLL5_CTRL_UPD (0x1 << 20)
+#define CCM_PLL5_CTRL_SIGMA_DELTA_EN (0x1 << 24)
#define CCM_PLL5_CTRL_EN (0x1 << 31)

#define PLL6_CFG_DEFAULT 0x90041811 /* 600 MHz */
@@ -274,6 +275,8 @@ struct sunxi_ccm_reg {

#define MBUS_CLK_DEFAULT 0x81000001 /* PLL6 / 2 */

+#define CCM_PLL5_PATTERN 0xd1303333
+
/* ahb_reset0 offsets */
#define AHB_RESET_OFFSET_GMAC 17
#define AHB_RESET_OFFSET_MCTL 14
@@ -308,4 +311,6 @@ struct sunxi_ccm_reg {
#define CCM_DE_CTRL_PLL10 (5 << 24)
#define CCM_DE_CTRL_GATE (1 << 31)

+void clock_set_pll5(unsigned int clk, bool sigma_delta_enable);
+
#endif /* _SUNXI_CLOCK_SUN6I_H */
--
2.1.0