[U-Boot] [PATCH 1/4] imx: clock support enet2 anatop clock support

Peng Fan
2015-08-03T10:06:17Z

To i.MX6SX/UL, two ethernet interfaces are supported.
Add ENET2 clock support:
1. Introduce a new input parameter "fec_id", only 0 and 1 are allowed.
To value 1, only i.MX6SX/UL can pass the check.
2. Modify board code who use this api to follow new api prototype.

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Cc: Heiko Schocher <hs@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Nikolaos Pasaloukos <Nikolaos.Pasaloukos@imgtec.com>
Cc: Stefano Babic <sbabic@denx.de>
---
arch/arm/cpu/armv7/mx6/clock.c | 23 ++++++++++++++++++-----
arch/arm/include/asm/arch-mx6/clock.h | 2 +-
arch/arm/include/asm/arch-mx6/crm_regs.h | 6 ++++++
board/aristainetos/aristainetos-v1.c | 2 +-
board/barco/platinum/platinum_picon.c | 2 +-
board/freescale/mx6qsabreauto/mx6qsabreauto.c | 2 +-
board/freescale/mx6slevk/mx6slevk.c | 2 +-
board/freescale/mx6sxsabresd/mx6sxsabresd.c | 2 +-
board/solidrun/mx6cuboxi/mx6cuboxi.c | 2 +-
9 files changed, 31 insertions(+), 12 deletions(-)

diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c
index 9cf4eec..8c0356f 100644
--- a/arch/arm/cpu/armv7/mx6/clock.c
+++ b/arch/arm/cpu/armv7/mx6/clock.c
@@ -524,7 +524,7 @@ void enable_qspi_clk(int qspi_num)
#endif

#ifdef CONFIG_FEC_MXC
-int enable_fec_anatop_clock(enum enet_freq freq)
+int enable_fec_anatop_clock(int fec_id, enum enet_freq freq)
{
u32 reg = 0;
s32 timeout = 100000;
@@ -535,9 +535,19 @@ int enable_fec_anatop_clock(enum enet_freq freq)
if (freq < ENET_25MHZ || freq > ENET_125MHZ)
return -EINVAL;

- reg = readl(&anatop->pll_enet);
- reg &= ~BM_ANADIG_PLL_ENET_DIV_SELECT;
- reg |= freq;
+ if (0 == fec_id) {
+ reg &= ~BM_ANADIG_PLL_ENET_DIV_SELECT;
+ reg |= BF_ANADIG_PLL_ENET_DIV_SELECT(freq);
+ } else if (1 == fec_id) {
+ /* Only i.MX6SX/UL support ENET2 */
+ if (!(is_cpu_type(MXC_CPU_MX6SX) ||
+ is_cpu_type(MXC_CPU_MX6UL)))
+ return -EINVAL;
+ reg &= ~BM_ANADIG_PLL_ENET2_DIV_SELECT;
+ reg |= BF_ANADIG_PLL_ENET2_DIV_SELECT(freq);
+ } else {
+ return -EINVAL;
+ }

if ((reg & BM_ANADIG_PLL_ENET_POWERDOWN) ||
(!(reg & BM_ANADIG_PLL_ENET_LOCK))) {
@@ -552,7 +562,10 @@ int enable_fec_anatop_clock(enum enet_freq freq)
}

/* Enable FEC clock */
- reg |= BM_ANADIG_PLL_ENET_ENABLE;
+ if (0 == fec_id)
+ reg |= BM_ANADIG_PLL_ENET_ENABLE;
+ else
+ reg |= BM_ANADIG_PLL_ENET2_ENABLE;
reg &= ~BM_ANADIG_PLL_ENET_BYPASS;
writel(reg, &anatop->pll_enet);

diff --git a/arch/arm/include/asm/arch-mx6/clock.h b/arch/arm/include/asm/arch-mx6/clock.h
index 7b3bbb8..2b220d6 100644
--- a/arch/arm/include/asm/arch-mx6/clock.h
+++ b/arch/arm/include/asm/arch-mx6/clock.h
@@ -64,7 +64,7 @@ int enable_pcie_clock(void);
int enable_i2c_clk(unsigned char enable, unsigned i2c_num);
int enable_spi_clk(unsigned char enable, unsigned spi_num);
void enable_ipu_clock(void);
-int enable_fec_anatop_clock(enum enet_freq freq);
+int enable_fec_anatop_clock(int fec_id, enum enet_freq freq);
void enable_enet_clk(unsigned char enable);
void enable_qspi_clk(int qspi_num);
void enable_thermal_clk(void);
diff --git a/arch/arm/include/asm/arch-mx6/crm_regs.h b/arch/arm/include/asm/arch-mx6/crm_regs.h
index fe75da4..10306cd 100644
--- a/arch/arm/include/asm/arch-mx6/crm_regs.h
+++ b/arch/arm/include/asm/arch-mx6/crm_regs.h
@@ -1052,6 +1052,12 @@ struct mxc_ccm_reg {
#define BF_ANADIG_PLL_ENET_DIV_SELECT(v) \
(((v) << 0) & BM_ANADIG_PLL_ENET_DIV_SELECT)

+/* ENET2 for i.MX6SX/UL */
+#define BM_ANADIG_PLL_ENET2_ENABLE 0x00100000
+#define BM_ANADIG_PLL_ENET2_DIV_SELECT 0x0000000C
+#define BF_ANADIG_PLL_ENET2_DIV_SELECT(v) \
+ (((v) << 2) & BM_ANADIG_PLL_ENET2_DIV_SELECT)
+
#define BM_ANADIG_PFD_480_PFD3_CLKGATE 0x80000000
#define BM_ANADIG_PFD_480_PFD3_STABLE 0x40000000
#define BP_ANADIG_PFD_480_PFD3_FRAC 24
diff --git a/board/aristainetos/aristainetos-v1.c b/board/aristainetos/aristainetos-v1.c
index d6a7614..b8fed2e 100644
--- a/board/aristainetos/aristainetos-v1.c
+++ b/board/aristainetos/aristainetos-v1.c
@@ -185,7 +185,7 @@ int board_eth_init(bd_t *bis)
/* clear gpr1[14], gpr1[18:17] to select anatop clock */
clrsetbits_le32(&iomuxc_regs->gpr[1], IOMUX_GPR1_FEC_MASK, 0);

- ret = enable_fec_anatop_clock(ENET_50MHZ);
+ ret = enable_fec_anatop_clock(0, ENET_50MHZ);
if (ret)
return ret;

diff --git a/board/barco/platinum/platinum_picon.c b/board/barco/platinum/platinum_picon.c
index b2eab76..0384a26 100644
--- a/board/barco/platinum/platinum_picon.c
+++ b/board/barco/platinum/platinum_picon.c
@@ -148,7 +148,7 @@ int platinum_setup_enet(void)
/* set GPIO_16 as ENET_REF_CLK_OUT */
setbits_le32(&iomux->gpr[1], IOMUXC_GPR1_ENET_CLK_SEL_MASK);

- return enable_fec_anatop_clock(ENET_50MHZ);
+ return enable_fec_anatop_clock(0, ENET_50MHZ);
}

int platinum_setup_i2c(void)
diff --git a/board/freescale/mx6qsabreauto/mx6qsabreauto.c b/board/freescale/mx6qsabreauto/mx6qsabreauto.c
index 98602f8..7c0e90a 100644
--- a/board/freescale/mx6qsabreauto/mx6qsabreauto.c
+++ b/board/freescale/mx6qsabreauto/mx6qsabreauto.c
@@ -361,7 +361,7 @@ static void setup_fec(void)
* select ENET MAC0 TX clock from PLL
*/
imx_iomux_set_gpr_register(5, 9, 1, 1);
- enable_fec_anatop_clock(ENET_125MHZ);
+ enable_fec_anatop_clock(0, ENET_125MHZ);
}

setup_iomux_enet();
diff --git a/board/freescale/mx6slevk/mx6slevk.c b/board/freescale/mx6slevk/mx6slevk.c
index 7c18c90..98e3ef0 100644
--- a/board/freescale/mx6slevk/mx6slevk.c
+++ b/board/freescale/mx6slevk/mx6slevk.c
@@ -279,7 +279,7 @@ static int setup_fec(void)
/* clear gpr1[14], gpr1[18:17] to select anatop clock */
clrsetbits_le32(&iomuxc_regs->gpr[1], IOMUX_GPR1_FEC_MASK, 0);

- return enable_fec_anatop_clock(ENET_50MHZ);
+ return enable_fec_anatop_clock(0, ENET_50MHZ);
}
#endif

diff --git a/board/freescale/mx6sxsabresd/mx6sxsabresd.c b/board/freescale/mx6sxsabresd/mx6sxsabresd.c
index d58a79a..ffc0046 100644
--- a/board/freescale/mx6sxsabresd/mx6sxsabresd.c
+++ b/board/freescale/mx6sxsabresd/mx6sxsabresd.c
@@ -170,7 +170,7 @@ static int setup_fec(void)
reg |= BM_ANADIG_PLL_ENET_REF_25M_ENABLE;
writel(reg, &anatop->pll_enet);

- return enable_fec_anatop_clock(ENET_125MHZ);
+ return enable_fec_anatop_clock(0, ENET_125MHZ);
}

int board_eth_init(bd_t *bis)
diff --git a/board/solidrun/mx6cuboxi/mx6cuboxi.c b/board/solidrun/mx6cuboxi/mx6cuboxi.c
index 9b1ecf0..8247e43 100644
--- a/board/solidrun/mx6cuboxi/mx6cuboxi.c
+++ b/board/solidrun/mx6cuboxi/mx6cuboxi.c
@@ -164,7 +164,7 @@ int board_eth_init(bd_t *bis)
struct mii_dev *bus;
struct phy_device *phydev;

- int ret = enable_fec_anatop_clock(ENET_25MHZ);
+ int ret = enable_fec_anatop_clock(0, ENET_25MHZ);
if (ret)
return ret;

--
1.8.4