[PATCH v2 6/6] ARM: davinci: da850: configure system configuration chip(CFGCHIP3) for emac
From: Prabhakar Lad <prabhakar.csengg@gmail.com>
Date: 2013-01-28 13:49:29
Also in:
linux-arm-kernel, linux-devicetree, lkml
Subsystem:
arm port, the rest, ti davinci machine support · Maintainers:
Russell King, Linus Torvalds, Bartosz Golaszewski
From: Lad, Prabhakar <redacted> The system configuration chip CFGCHIP3, controls the emac module. This patch appropriately configures this register for emac and sets DA850_MII_MDIO_CLKEN_PIN GPIO pin appropriately. Signed-off-by: Lad, Prabhakar <redacted> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: davinci-linux-open-source@linux.davincidsp.com Cc: netdev@vger.kernel.org Cc: devicetree-discuss@lists.ozlabs.org Cc: Sekhar Nori <redacted> Cc: Heiko Schocher <redacted> --- arch/arm/mach-davinci/da8xx-dt.c | 28 ++++++++++++++++++++++++++++ 1 files changed, 28 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-davinci/da8xx-dt.c b/arch/arm/mach-davinci/da8xx-dt.c
index e533a0a..4a096e3 100644
--- a/arch/arm/mach-davinci/da8xx-dt.c
+++ b/arch/arm/mach-davinci/da8xx-dt.c@@ -8,6 +8,7 @@ * published by the Free Software Foundation. */ #include <linux/io.h> +#include <linux/gpio.h> #include <linux/of_irq.h> #include <linux/of_platform.h> #include <linux/irqdomain.h>
@@ -39,6 +40,32 @@ static void __init da8xx_init_irq(void) #ifdef CONFIG_ARCH_DAVINCI_DA850 +static void __init da8xx_config_emac(void) +{ +#define DA850_MII_MDIO_CLKEN_PIN GPIO_TO_PIN(2, 6) +#define DA850_EMAC_MODE_SELECT BIT(8) + void __iomem *cfg_chip3_base; + int ret; + u32 val; + + cfg_chip3_base = DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP3_REG); + + val = __raw_readl(cfg_chip3_base); + val &= ~DA850_EMAC_MODE_SELECT; + /* configure the CFGCHIP3 register for MII */ + __raw_writel(val, cfg_chip3_base); + pr_info("EMAC: MII PHY configured\n"); + + ret = gpio_request(DA850_MII_MDIO_CLKEN_PIN, "mdio_clk_en"); + if (ret) { + pr_warn("Cannot open GPIO %d\n", + DA850_MII_MDIO_CLKEN_PIN); + return; + } + /* Enable/Disable MII MDIO clock */ + gpio_direction_output(DA850_MII_MDIO_CLKEN_PIN, 0); +} + struct of_dev_auxdata da8xx_auxdata[] __initdata = { OF_DEV_AUXDATA("ti,davinci_mdio", 0x01e24000, "davinci_mdio.0", NULL), OF_DEV_AUXDATA("ti,davinci-dm6467-emac", 0x01e20000, "davinci_emac.1",
@@ -52,6 +79,7 @@ static void __init da850_init_machine(void) da8xx_auxdata, NULL); da8xx_uart_clk_enable(); + da8xx_config_emac(); } static const char *da850_boards_compat[] __initdata = {
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1.7.4.1