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Date: Mon, 22 Sep 2014 19:09:29 +0200
From: Stefan Agner <stefan@...er.ch>
To: shawn.guo@...escale.com, kernel@...gutronix.de,
linus.walleij@...aro.org, gnurou@...il.com
Cc: linux@....linux.org.uk, jingchang.lu@...escale.com,
b20788@...escale.com, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
stefan@...er.ch
Subject: [PATCH 8/9] ARM: imx: clk-gate2: allow custom gate configuration
The 2-bit gates found i.MX and Vybrid SoC support different clock
configuration:
0b00: clk disabled
0b01: clk enabled in RUN mode but disabled in WAIT and STOP mode
0b10: clk enabled in RUN, WAIT and STOP mode (only Vybrid)
0b11: clk enabled in RUN and WAIT mode
For some clocks, we might want to configure different behaviour,
e.g. a memory clock should be on even in STOP mode. Add a new
function imx_clk_gate2_cgr which allow to configure specific
gate values through the cgr_val parameter.
Signed-off-by: Stefan Agner <stefan@...er.ch>
---
arch/arm/mach-imx/clk-gate2.c | 7 +++++--
arch/arm/mach-imx/clk-vf610.c | 3 +++
arch/arm/mach-imx/clk.h | 13 ++++++++++---
include/dt-bindings/clock/vf610-clock.h | 3 ++-
4 files changed, 20 insertions(+), 6 deletions(-)
diff --git a/arch/arm/mach-imx/clk-gate2.c b/arch/arm/mach-imx/clk-gate2.c
index 84acdfd..8c22a84 100644
--- a/arch/arm/mach-imx/clk-gate2.c
+++ b/arch/arm/mach-imx/clk-gate2.c
@@ -31,6 +31,7 @@ struct clk_gate2 {
struct clk_hw hw;
void __iomem *reg;
u8 bit_idx;
+ u8 cgr_val;
u8 flags;
spinlock_t *lock;
unsigned int *share_count;
@@ -50,7 +51,8 @@ static int clk_gate2_enable(struct clk_hw *hw)
goto out;
reg = readl(gate->reg);
- reg |= 3 << gate->bit_idx;
+ reg &= ~(3 << gate->bit_idx);
+ reg |= gate->cgr_val << gate->bit_idx;
writel(reg, gate->reg);
out:
@@ -110,7 +112,7 @@ static struct clk_ops clk_gate2_ops = {
struct clk *clk_register_gate2(struct device *dev, const char *name,
const char *parent_name, unsigned long flags,
- void __iomem *reg, u8 bit_idx,
+ void __iomem *reg, u8 bit_idx, u8 cgr_val,
u8 clk_gate2_flags, spinlock_t *lock,
unsigned int *share_count)
{
@@ -125,6 +127,7 @@ struct clk *clk_register_gate2(struct device *dev, const char *name,
/* struct clk_gate2 assignments */
gate->reg = reg;
gate->bit_idx = bit_idx;
+ gate->cgr_val = cgr_val;
gate->flags = clk_gate2_flags;
gate->lock = lock;
diff --git a/arch/arm/mach-imx/clk-vf610.c b/arch/arm/mach-imx/clk-vf610.c
index a178184..1034e78 100644
--- a/arch/arm/mach-imx/clk-vf610.c
+++ b/arch/arm/mach-imx/clk-vf610.c
@@ -103,6 +103,7 @@ static struct clk_onecell_data clk_data;
static unsigned int const clks_init_on[] __initconst = {
VF610_CLK_SYS_BUS,
VF610_CLK_DDR_SEL,
+ VF610_CLK_DDRMC,
};
static void __init vf610_clocks_init(struct device_node *ccm_node)
@@ -171,6 +172,8 @@ static void __init vf610_clocks_init(struct device_node *ccm_node)
clk[VF610_CLK_PLL4_MAIN_DIV] = clk_register_divider_table(NULL, "pll4_main_div", "pll4_main", 0, CCM_CACRR, 6, 3, 0, pll4_main_div_table, &imx_ccm_lock);
clk[VF610_CLK_PLL6_MAIN_DIV] = imx_clk_divider("pll6_main_div", "pll6_main", CCM_CACRR, 21, 1);
+ clk[VF610_CLK_DDRMC] = imx_clk_gate2_cgr("ddrmc", "ddr_sel", CCM_CCGR6, CCM_CCGRx_CGn(14), 0x2);
+
clk[VF610_CLK_USBPHY0] = imx_clk_gate("usbphy0", "pll3_main", PLL3_CTRL, 6);
clk[VF610_CLK_USBPHY1] = imx_clk_gate("usbphy1", "pll7_main", PLL7_CTRL, 6);
diff --git a/arch/arm/mach-imx/clk.h b/arch/arm/mach-imx/clk.h
index 4cdf8b6..d22e339 100644
--- a/arch/arm/mach-imx/clk.h
+++ b/arch/arm/mach-imx/clk.h
@@ -29,7 +29,7 @@ struct clk *imx_clk_pllv3(enum imx_pllv3_type type, const char *name,
struct clk *clk_register_gate2(struct device *dev, const char *name,
const char *parent_name, unsigned long flags,
- void __iomem *reg, u8 bit_idx,
+ void __iomem *reg, u8 bit_idx, u8 cgr_val,
u8 clk_gate_flags, spinlock_t *lock,
unsigned int *share_count);
@@ -43,7 +43,7 @@ static inline struct clk *imx_clk_gate2(const char *name, const char *parent,
void __iomem *reg, u8 shift)
{
return clk_register_gate2(NULL, name, parent, CLK_SET_RATE_PARENT, reg,
- shift, 0, &imx_ccm_lock, NULL);
+ shift, 0x3, 0, &imx_ccm_lock, NULL);
}
static inline struct clk *imx_clk_gate2_shared(const char *name,
@@ -51,7 +51,14 @@ static inline struct clk *imx_clk_gate2_shared(const char *name,
unsigned int *share_count)
{
return clk_register_gate2(NULL, name, parent, CLK_SET_RATE_PARENT, reg,
- shift, 0, &imx_ccm_lock, share_count);
+ shift, 0x3, 0, &imx_ccm_lock, share_count);
+}
+
+static inline struct clk *imx_clk_gate2_cgr(const char *name,
+ const char *parent, void __iomem *reg, u8 shift, u8 cgr_val)
+{
+ return clk_register_gate2(NULL, name, parent, CLK_SET_RATE_PARENT, reg,
+ shift, cgr_val, 0, &imx_ccm_lock, NULL);
}
struct clk *imx_clk_pfd(const char *name, const char *parent_name,
diff --git a/include/dt-bindings/clock/vf610-clock.h b/include/dt-bindings/clock/vf610-clock.h
index d6b56b2..84c4809 100644
--- a/include/dt-bindings/clock/vf610-clock.h
+++ b/include/dt-bindings/clock/vf610-clock.h
@@ -169,6 +169,7 @@
#define VF610_CLK_PLL7_MAIN 156
#define VF610_CLK_USBPHY0 157
#define VF610_CLK_USBPHY1 158
-#define VF610_CLK_END 159
+#define VF610_CLK_DDRMC 159
+#define VF610_CLK_END 160
#endif /* __DT_BINDINGS_CLOCK_VF610_H */
--
2.1.0
--
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