[PATCH v10 6/6] clk: X1000: Add FIXDIV for SSI clock of X1000.

From: åçæ (Zhou Yanjie)
Date: Tue May 26 2020 - 10:42:50 EST

1.The SSI clock of X1000 not like JZ4770 and JZ4780, they are not
directly derived from the output of SSIPLL, but from the clock
obtained by dividing the frequency by 2. "X1000_CLK_SSIPLL_DIV2"
is added for this purpose, and ensure that it initialized before
"X1000_CLK_SSIMUX" when initializing the clocks.
2.Clocks of LCD, OTG, EMC, EFUSE, OST, TCU, and gates of CPU, PCLK
are also added.
3.Use "CLK_OF_DECLARE_DRIVER" like the other CGU drivers.

Signed-off-by: åçæ (Zhou Yanjie) <zhouyanjie@xxxxxxxxxxxxxx>
Reviewed-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
---

Notes:
v5:
New patch.

V5->v6:
Add missing part of X1000's CGU.

v6->v7:
Update commit message.

v7->v8:
No change.

v8->v9:
Add Paul Cercueil's Reviewed-by, somehow his emails are not displayed
on the mailing list and patchwork of clock framework subsystem.

v9->v10:
No change.

drivers/clk/ingenic/x1000-cgu.c | 110 ++++++++++++++++++++++++++++++++++++++--
1 file changed, 105 insertions(+), 5 deletions(-)

diff --git a/drivers/clk/ingenic/x1000-cgu.c b/drivers/clk/ingenic/x1000-cgu.c
index c33934d8ac14..68c6e62457e1 100644
--- a/drivers/clk/ingenic/x1000-cgu.c
+++ b/drivers/clk/ingenic/x1000-cgu.c
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
/*
* X1000 SoC CGU driver
- * Copyright (c) 2019 Zhou Yanjie <zhouyanjie@xxxxxxxx>
+ * Copyright (c) 2019 åçæ (Zhou Yanjie) <zhouyanjie@xxxxxxxxxxxxxx>
*/

#include <linux/clk-provider.h>
@@ -20,6 +20,9 @@
#define CGU_REG_CLKGR 0x20
#define CGU_REG_OPCR 0x24
#define CGU_REG_DDRCDR 0x2c
+#define CGU_REG_USBPCR 0x3c
+#define CGU_REG_USBPCR1 0x48
+#define CGU_REG_USBCDR 0x50
#define CGU_REG_MACCDR 0x54
#define CGU_REG_I2SCDR 0x60
#define CGU_REG_LPCDR 0x64
@@ -40,8 +43,47 @@
#define OPCR_SPENDN0 BIT(7)
#define OPCR_SPENDN1 BIT(6)

+/* bits within the USBPCR register */
+#define USBPCR_SIDDQ BIT(21)
+#define USBPCR_OTG_DISABLE BIT(20)
+
static struct ingenic_cgu *cgu;

+static int x1000_usb_phy_enable(struct clk_hw *hw)
+{
+ void __iomem *reg_opcr = cgu->base + CGU_REG_OPCR;
+ void __iomem *reg_usbpcr = cgu->base + CGU_REG_USBPCR;
+
+ writel(readl(reg_opcr) | OPCR_SPENDN0, reg_opcr);
+ writel(readl(reg_usbpcr) & ~USBPCR_OTG_DISABLE & ~USBPCR_SIDDQ, reg_usbpcr);
+ return 0;
+}
+
+static void x1000_usb_phy_disable(struct clk_hw *hw)
+{
+ void __iomem *reg_opcr = cgu->base + CGU_REG_OPCR;
+ void __iomem *reg_usbpcr = cgu->base + CGU_REG_USBPCR;
+
+ writel(readl(reg_opcr) & ~OPCR_SPENDN0, reg_opcr);
+ writel(readl(reg_usbpcr) | USBPCR_OTG_DISABLE | USBPCR_SIDDQ, reg_usbpcr);
+}
+
+static int x1000_usb_phy_is_enabled(struct clk_hw *hw)
+{
+ void __iomem *reg_opcr = cgu->base + CGU_REG_OPCR;
+ void __iomem *reg_usbpcr = cgu->base + CGU_REG_USBPCR;
+
+ return (readl(reg_opcr) & OPCR_SPENDN0) &&
+ !(readl(reg_usbpcr) & USBPCR_SIDDQ) &&
+ !(readl(reg_usbpcr) & USBPCR_OTG_DISABLE);
+}
+
+static const struct clk_ops x1000_otg_phy_ops = {
+ .enable = x1000_usb_phy_enable,
+ .disable = x1000_usb_phy_disable,
+ .is_enabled = x1000_usb_phy_is_enabled,
+};
+
static const s8 pll_od_encoding[8] = {
0x0, 0x1, -1, 0x2, -1, -1, -1, 0x3,
};
@@ -101,6 +143,15 @@ static const struct ingenic_cgu_clk_info x1000_cgu_clocks[] = {
},
},

+
+ /* Custom (SoC-specific) OTG PHY */
+
+ [X1000_CLK_OTGPHY] = {
+ "otg_phy", CGU_CLK_CUSTOM,
+ .parents = { -1, -1, X1000_CLK_EXCLK, -1 },
+ .custom = { &x1000_otg_phy_ops },
+ },
+
/* Muxes & dividers */

[X1000_CLK_SCLKA] = {
@@ -116,9 +167,10 @@ static const struct ingenic_cgu_clk_info x1000_cgu_clocks[] = {
},

[X1000_CLK_CPU] = {
- "cpu", CGU_CLK_DIV,
+ "cpu", CGU_CLK_DIV | CGU_CLK_GATE,
.parents = { X1000_CLK_CPUMUX, -1, -1, -1 },
.div = { CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1 },
+ .gate = { CGU_REG_CLKGR, 30 },
},

[X1000_CLK_L2CACHE] = {
@@ -147,9 +199,10 @@ static const struct ingenic_cgu_clk_info x1000_cgu_clocks[] = {
},

[X1000_CLK_PCLK] = {
- "pclk", CGU_CLK_DIV,
+ "pclk", CGU_CLK_DIV | CGU_CLK_GATE,
.parents = { X1000_CLK_AHB2PMUX, -1, -1, -1 },
.div = { CGU_REG_CPCCR, 16, 1, 4, 20, -1, -1 },
+ .gate = { CGU_REG_CLKGR, 28 },
},

[X1000_CLK_DDR] = {
@@ -162,12 +215,20 @@ static const struct ingenic_cgu_clk_info x1000_cgu_clocks[] = {

[X1000_CLK_MAC] = {
"mac", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE,
- .parents = { X1000_CLK_SCLKA, X1000_CLK_MPLL},
+ .parents = { X1000_CLK_SCLKA, X1000_CLK_MPLL },
.mux = { CGU_REG_MACCDR, 31, 1 },
.div = { CGU_REG_MACCDR, 0, 1, 8, 29, 28, 27 },
.gate = { CGU_REG_CLKGR, 25 },
},

+ [X1000_CLK_LCD] = {
+ "lcd", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE,
+ .parents = { X1000_CLK_SCLKA, X1000_CLK_MPLL },
+ .mux = { CGU_REG_LPCDR, 31, 1 },
+ .div = { CGU_REG_LPCDR, 0, 1, 8, 28, 27, 26 },
+ .gate = { CGU_REG_CLKGR, 23 },
+ },
+
[X1000_CLK_MSCMUX] = {
"msc_mux", CGU_CLK_MUX,
.parents = { X1000_CLK_SCLKA, X1000_CLK_MPLL},
@@ -188,6 +249,15 @@ static const struct ingenic_cgu_clk_info x1000_cgu_clocks[] = {
.gate = { CGU_REG_CLKGR, 5 },
},

+ [X1000_CLK_OTG] = {
+ "otg", CGU_CLK_DIV | CGU_CLK_GATE | CGU_CLK_MUX,
+ .parents = { X1000_CLK_EXCLK, -1,
+ X1000_CLK_APLL, X1000_CLK_MPLL },
+ .mux = { CGU_REG_USBCDR, 30, 2 },
+ .div = { CGU_REG_USBCDR, 0, 1, 8, 29, 28, 27 },
+ .gate = { CGU_REG_CLKGR, 3 },
+ },
+
[X1000_CLK_SSIPLL] = {
"ssi_pll", CGU_CLK_MUX | CGU_CLK_DIV,
.parents = { X1000_CLK_SCLKA, X1000_CLK_MPLL, -1, -1 },
@@ -195,14 +265,32 @@ static const struct ingenic_cgu_clk_info x1000_cgu_clocks[] = {
.div = { CGU_REG_SSICDR, 0, 1, 8, 29, 28, 27 },
},

+ [X1000_CLK_SSIPLL_DIV2] = {
+ "ssi_pll_div2", CGU_CLK_FIXDIV,
+ .parents = { X1000_CLK_SSIPLL },
+ .fixdiv = { 2 },
+ },
+
[X1000_CLK_SSIMUX] = {
"ssi_mux", CGU_CLK_MUX,
- .parents = { X1000_CLK_EXCLK, X1000_CLK_SSIPLL, -1, -1 },
+ .parents = { X1000_CLK_EXCLK, X1000_CLK_SSIPLL_DIV2, -1, -1 },
.mux = { CGU_REG_SSICDR, 30, 1 },
},

/* Gate-only clocks */

+ [X1000_CLK_EMC] = {
+ "emc", CGU_CLK_GATE,
+ .parents = { X1000_CLK_AHB2, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR, 0 },
+ },
+
+ [X1000_CLK_EFUSE] = {
+ "efuse", CGU_CLK_GATE,
+ .parents = { X1000_CLK_AHB2, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR, 1 },
+ },
+
[X1000_CLK_SFC] = {
"sfc", CGU_CLK_GATE,
.parents = { X1000_CLK_SSIPLL, -1, -1, -1 },
@@ -245,12 +333,24 @@ static const struct ingenic_cgu_clk_info x1000_cgu_clocks[] = {
.gate = { CGU_REG_CLKGR, 16 },
},

+ [X1000_CLK_TCU] = {
+ "tcu", CGU_CLK_GATE,
+ .parents = { X1000_CLK_EXCLK, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR, 18 },
+ },
+
[X1000_CLK_SSI] = {
"ssi", CGU_CLK_GATE,
.parents = { X1000_CLK_SSIMUX, -1, -1, -1 },
.gate = { CGU_REG_CLKGR, 19 },
},

+ [X1000_CLK_OST] = {
+ "ost", CGU_CLK_GATE,
+ .parents = { X1000_CLK_EXCLK, -1, -1, -1 },
+ .gate = { CGU_REG_CLKGR, 20 },
+ },
+
[X1000_CLK_PDMA] = {
"pdma", CGU_CLK_GATE,
.parents = { X1000_CLK_EXCLK, -1, -1, -1 },
--
2.11.0