summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorHans de Goede <hdegoede@redhat.com>2014-10-22 14:48:38 +0200
committerHans de Goede <hdegoede@redhat.com>2014-10-24 09:37:25 +0200
commitd0dbc286036a4e4e01ca056e40d952a081162a8c (patch)
treeafe35daeeac0ab1575f2d81f9b5a836cb292e393
parent9e54f6ee0148ae26aa673b45aaf77c2782232f48 (diff)
downloadu-boot-imx-d0dbc286036a4e4e01ca056e40d952a081162a8c.zip
u-boot-imx-d0dbc286036a4e4e01ca056e40d952a081162a8c.tar.gz
u-boot-imx-d0dbc286036a4e4e01ca056e40d952a081162a8c.tar.bz2
sunxi: dram: Use clock_get_pll5p to calculate mbus, rather then hardcoding
This is a preparation patch for making the pll5 "p" divisor configurable through Kconfig. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
-rw-r--r--arch/arm/cpu/armv7/sunxi/dram.c32
1 files changed, 14 insertions, 18 deletions
diff --git a/arch/arm/cpu/armv7/sunxi/dram.c b/arch/arm/cpu/armv7/sunxi/dram.c
index 584f742..0cbcf57 100644
--- a/arch/arm/cpu/armv7/sunxi/dram.c
+++ b/arch/arm/cpu/armv7/sunxi/dram.c
@@ -252,15 +252,9 @@ static void mctl_setup_dram_clock(u32 clk, u32 mbus_clk)
{
u32 reg_val;
struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
-
- /* PLL5P and PLL6 are the potential clock sources for MBUS */
- u32 pll6x_div, pll5p_div;
- u32 pll6x_clk = clock_get_pll6() / 1000000;
- u32 pll5p_clk = clk / 24 * 48;
+ u32 pll5p_clk, pll6x_clk;
+ u32 pll5p_div, pll6x_div;
u32 pll5p_rate, pll6x_rate;
-#ifdef CONFIG_SUN7I
- pll6x_clk *= 2; /* sun7i uses PLL6*2, sun5i uses just PLL6 */
-#endif
/* setup DRAM PLL */
reg_val = readl(&ccm->pll5_cfg);
@@ -269,32 +263,27 @@ static void mctl_setup_dram_clock(u32 clk, u32 mbus_clk)
reg_val &= ~CCM_PLL5_CTRL_N_MASK; /* set N to 0 (x0) */
reg_val &= ~CCM_PLL5_CTRL_P_MASK; /* set P to 0 (x1) */
if (clk >= 540 && clk < 552) {
- /* dram = 540MHz, pll5p = 1080MHz */
- pll5p_clk = 1080;
+ /* dram = 540MHz */
reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(2));
reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(3));
reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(15));
} else if (clk >= 512 && clk < 528) {
- /* dram = 512MHz, pll5p = 1536MHz */
- pll5p_clk = 1536;
+ /* dram = 512MHz */
reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(3));
reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(4));
reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(16));
} else if (clk >= 496 && clk < 504) {
- /* dram = 496MHz, pll5p = 1488MHz */
- pll5p_clk = 1488;
+ /* dram = 496MHz */
reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(3));
reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(2));
reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(31));
} else if (clk >= 468 && clk < 480) {
- /* dram = 468MHz, pll5p = 936MHz */
- pll5p_clk = 936;
+ /* dram = 468MHz */
reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(2));
reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(3));
reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(13));
} else if (clk >= 396 && clk < 408) {
- /* dram = 396MHz, pll5p = 792MHz */
- pll5p_clk = 792;
+ /* dram = 396MHz */
reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(2));
reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(3));
reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(11));
@@ -322,6 +311,13 @@ static void mctl_setup_dram_clock(u32 clk, u32 mbus_clk)
/* setup MBUS clock */
if (!mbus_clk)
mbus_clk = 300;
+
+ /* PLL5P and PLL6 are the potential clock sources for MBUS */
+ pll6x_clk = clock_get_pll6() / 1000000;
+#ifdef CONFIG_SUN7I
+ pll6x_clk *= 2; /* sun7i uses PLL6*2, sun5i uses just PLL6 */
+#endif
+ pll5p_clk = clock_get_pll5p() / 1000000;
pll6x_div = DIV_ROUND_UP(pll6x_clk, mbus_clk);
pll5p_div = DIV_ROUND_UP(pll5p_clk, mbus_clk);
pll6x_rate = pll6x_clk / pll6x_div;