[PATCH v2 14/15] aspeed: Refactor SCU to use consistent mask & shift
Maxim Sloyko
maxims at google.com
Sat May 6 08:01:14 AEST 2017
Refactor SCU header to use consistent Mask & Shift values.
Now, consistently, to read value from SCU register, mask needs
to be applied before shift.
Signed-off-by: Maxim Sloyko <maxims at google.com>
Reviewed-by: Simon Glass <sjg at chromium.org>
---
Changes in v2: None
Changes in v1: None
arch/arm/include/asm/arch-aspeed/scu_ast2500.h | 12 ++++----
arch/arm/mach-aspeed/ast2500/sdram_ast2500.c | 5 ++--
drivers/clk/aspeed/clk_ast2500.c | 39 +++++++++++++-------------
3 files changed, 27 insertions(+), 29 deletions(-)
diff --git a/arch/arm/include/asm/arch-aspeed/scu_ast2500.h b/arch/arm/include/asm/arch-aspeed/scu_ast2500.h
index fe877b5430..590aed2f6c 100644
--- a/arch/arm/include/asm/arch-aspeed/scu_ast2500.h
+++ b/arch/arm/include/asm/arch-aspeed/scu_ast2500.h
@@ -8,8 +8,8 @@
#define SCU_UNLOCK_VALUE 0x1688a8a8
-#define SCU_HWSTRAP_VGAMEM_MASK 3
#define SCU_HWSTRAP_VGAMEM_SHIFT 2
+#define SCU_HWSTRAP_VGAMEM_MASK (3 << SCU_HWSTRAP_VGAMEM_SHIFT)
#define SCU_HWSTRAP_MAC1_RGMII (1 << 6)
#define SCU_HWSTRAP_MAC2_RGMII (1 << 7)
#define SCU_HWSTRAP_DDR4 (1 << 24)
@@ -18,17 +18,17 @@
#define SCU_MPLL_DENUM_SHIFT 0
#define SCU_MPLL_DENUM_MASK 0x1f
#define SCU_MPLL_NUM_SHIFT 5
-#define SCU_MPLL_NUM_MASK 0xff
+#define SCU_MPLL_NUM_MASK (0xff << SCU_MPLL_NUM_SHIFT)
#define SCU_MPLL_POST_SHIFT 13
-#define SCU_MPLL_POST_MASK 0x3f
+#define SCU_MPLL_POST_MASK (0x3f << SCU_MPLL_POST_SHIFT)
#define SCU_PCLK_DIV_SHIFT 23
-#define SCU_PCLK_DIV_MASK 7
+#define SCU_PCLK_DIV_MASK (7 << SCU_PCLK_DIV_SHIFT)
#define SCU_HPLL_DENUM_SHIFT 0
#define SCU_HPLL_DENUM_MASK 0x1f
#define SCU_HPLL_NUM_SHIFT 5
-#define SCU_HPLL_NUM_MASK 0xff
+#define SCU_HPLL_NUM_MASK (0xff << SCU_HPLL_NUM_SHIFT)
#define SCU_HPLL_POST_SHIFT 13
-#define SCU_HPLL_POST_MASK 0x3f
+#define SCU_HPLL_POST_MASK (0x3f << SCU_HPLL_POST_SHIFT)
#define SCU_MACCLK_SHIFT 16
#define SCU_MACCLK_MASK (7 << SCU_MACCLK_SHIFT)
diff --git a/arch/arm/mach-aspeed/ast2500/sdram_ast2500.c b/arch/arm/mach-aspeed/ast2500/sdram_ast2500.c
index efcf452b17..6383f727f2 100644
--- a/arch/arm/mach-aspeed/ast2500/sdram_ast2500.c
+++ b/arch/arm/mach-aspeed/ast2500/sdram_ast2500.c
@@ -183,9 +183,8 @@ static int ast2500_sdrammc_ddr4_calibrate_vref(struct dram_info *info)
static size_t ast2500_sdrammc_get_vga_mem_size(struct dram_info *info)
{
size_t vga_mem_size_base = 8 * 1024 * 1024;
- u32 vga_hwconf = (readl(&info->scu->hwstrap)
- >> SCU_HWSTRAP_VGAMEM_SHIFT)
- & SCU_HWSTRAP_VGAMEM_MASK;
+ u32 vga_hwconf = (readl(&info->scu->hwstrap) & SCU_HWSTRAP_VGAMEM_MASK)
+ >> SCU_HWSTRAP_VGAMEM_SHIFT;
return vga_mem_size_base << vga_hwconf;
}
diff --git a/drivers/clk/aspeed/clk_ast2500.c b/drivers/clk/aspeed/clk_ast2500.c
index 7b4b5c64ac..ccf47a1da1 100644
--- a/drivers/clk/aspeed/clk_ast2500.c
+++ b/drivers/clk/aspeed/clk_ast2500.c
@@ -52,11 +52,11 @@ struct ast2500_div_config {
*/
static ulong ast2500_get_mpll_rate(ulong clkin, u32 mpll_reg)
{
- const ulong num = (mpll_reg >> SCU_MPLL_NUM_SHIFT) & SCU_MPLL_NUM_MASK;
- const ulong denum = (mpll_reg >> SCU_MPLL_DENUM_SHIFT)
- & SCU_MPLL_DENUM_MASK;
- const ulong post_div = (mpll_reg >> SCU_MPLL_POST_SHIFT)
- & SCU_MPLL_POST_MASK;
+ const ulong num = (mpll_reg & SCU_MPLL_NUM_MASK) >> SCU_MPLL_NUM_SHIFT;
+ const ulong denum = (mpll_reg & SCU_MPLL_DENUM_MASK)
+ >> SCU_MPLL_DENUM_SHIFT;
+ const ulong post_div = (mpll_reg & SCU_MPLL_POST_MASK)
+ >> SCU_MPLL_POST_SHIFT;
return (clkin * ((num + 1) / (denum + 1))) / (post_div + 1);
}
@@ -67,11 +67,11 @@ static ulong ast2500_get_mpll_rate(ulong clkin, u32 mpll_reg)
*/
static ulong ast2500_get_hpll_rate(ulong clkin, u32 hpll_reg)
{
- const ulong num = (hpll_reg >> SCU_HPLL_NUM_SHIFT) & SCU_HPLL_NUM_MASK;
- const ulong denum = (hpll_reg >> SCU_HPLL_DENUM_SHIFT)
- & SCU_HPLL_DENUM_MASK;
- const ulong post_div = (hpll_reg >> SCU_HPLL_POST_SHIFT)
- & SCU_HPLL_POST_MASK;
+ const ulong num = (hpll_reg & SCU_HPLL_NUM_MASK) >> SCU_HPLL_NUM_SHIFT;
+ const ulong denum = (hpll_reg & SCU_HPLL_DENUM_MASK)
+ >> SCU_HPLL_DENUM_SHIFT;
+ const ulong post_div = (hpll_reg & SCU_HPLL_POST_MASK)
+ >> SCU_HPLL_POST_SHIFT;
return (clkin * ((num + 1) / (denum + 1))) / (post_div + 1);
}
@@ -136,11 +136,11 @@ static ulong ast2500_clk_get_rate(struct clk *clk)
case BCLK_PCLK:
{
ulong apb_div = 4 + 4 * ((readl(&priv->scu->clk_sel1)
- >> SCU_PCLK_DIV_SHIFT) &
- SCU_PCLK_DIV_MASK);
+ & SCU_PCLK_DIV_MASK)
+ >> SCU_PCLK_DIV_SHIFT);
rate = ast2500_get_hpll_rate(clkin,
- readl(&priv->scu->
- h_pll_param));
+ readl(&priv->
+ scu->h_pll_param));
rate = rate / apb_div;
}
break;
@@ -223,17 +223,16 @@ static ulong ast2500_configure_ddr(struct ast2500_scu *scu, ulong rate)
ulong clkin = ast2500_get_clkin(scu);
u32 mpll_reg;
struct ast2500_div_config div_cfg = {
- .num = SCU_MPLL_NUM_MASK,
- .denum = SCU_MPLL_DENUM_MASK,
- .post_div = SCU_MPLL_POST_MASK
+ .num = (SCU_MPLL_NUM_MASK >> SCU_MPLL_NUM_SHIFT),
+ .denum = (SCU_MPLL_DENUM_MASK >> SCU_MPLL_DENUM_SHIFT),
+ .post_div = (SCU_MPLL_POST_MASK >> SCU_MPLL_POST_SHIFT),
};
ast2500_calc_clock_config(clkin, rate, &div_cfg);
mpll_reg = readl(&scu->m_pll_param);
- mpll_reg &= ~((SCU_MPLL_POST_MASK << SCU_MPLL_POST_SHIFT)
- | (SCU_MPLL_NUM_MASK << SCU_MPLL_NUM_SHIFT)
- | (SCU_MPLL_DENUM_MASK << SCU_MPLL_DENUM_SHIFT));
+ mpll_reg &= ~(SCU_MPLL_POST_MASK | SCU_MPLL_NUM_MASK
+ | SCU_MPLL_DENUM_MASK);
mpll_reg |= (div_cfg.post_div << SCU_MPLL_POST_SHIFT)
| (div_cfg.num << SCU_MPLL_NUM_SHIFT)
| (div_cfg.denum << SCU_MPLL_DENUM_SHIFT);
--
2.13.0.rc1.294.g07d810a77f-goog
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