134 lines
3.5 KiB
Diff
134 lines
3.5 KiB
Diff
From 4b17f5ce43df8b18c977386081d57929470e6bba Mon Sep 17 00:00:00 2001
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From: Alex Gonzalez <alex.gonzalez@digi.com>
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Date: Thu, 16 May 2013 10:31:24 +0200
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Subject: [PATCH 2/2] cpx2e: Setup mmc0 for the wireless interface.
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The Atheros wireless chip is connected via SDIO to mmc0. This commits
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sets up the interface ready to be used.
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Signed-off-by: Alex Gonzalez <alex.gonzalez@digi.com>
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---
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arch/arm/mach-mx28/device.c | 102 ++++++++++++++++++++++++++++++++++++++++++-
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1 file changed, 101 insertions(+), 1 deletion(-)
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diff --git a/arch/arm/mach-mx28/device.c b/arch/arm/mach-mx28/device.c
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index ca0739c..1475b28 100755
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--- a/arch/arm/mach-mx28/device.c
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+++ b/arch/arm/mach-mx28/device.c
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@@ -398,7 +398,7 @@ static void mx28_init_gpmi_nfc(void)
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#endif
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#if defined(CONFIG_MMC_MXS) || defined(CONFIG_MMC_MXS_MODULE)
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-#if defined(CONFIG_MACH_MX28EVK) || defined (CONFIG_MACH_CPX2) || defined (CONFIG_MACH_WR21)
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+#if defined(CONFIG_MACH_MX28EVK) || defined (CONFIG_MACH_WR21)
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#define MMC0_POWER MXS_PIN_TO_GPIO(PINID_PWM3)
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#define MMC1_POWER MXS_PIN_TO_GPIO(PINID_PWM4)
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#define MMC0_WP MXS_PIN_TO_GPIO(PINID_SSP1_SCK)
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@@ -629,6 +629,106 @@ static void __init mx28_init_mmc(void)
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mxs_add_device(pdev, 2);
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}
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}
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+#elif defined (CONFIG_MACH_CPX2)
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+#define MMC0_POWER MXS_PIN_TO_GPIO(PINID_AUART1_TX)
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+
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+static int mxs_mmc_hw_init_ssp0(void)
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+{
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+ int ret = 0;
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+
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+ /* Configure POWER pin as gpio to drive power to MMC slot */
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+ ret = gpio_request(MMC0_POWER, "mmc0_power");
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+ if (ret)
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+ goto out_power;
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+
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+ gpio_direction_output(MMC0_POWER, 1);
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+ mdelay(100);
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+
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+ return 0;
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+
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+out_power:
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+ return ret;
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+}
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+
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+static void mxs_mmc_hw_release_ssp0(void)
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+{
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+ gpio_free(MMC0_POWER);
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+}
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+
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+static void mxs_mmc_cmd_pullup_ssp0(int enable)
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+{
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+ mxs_set_pullup(PINID_SSP0_CMD, enable, 0 /* sysfs */, "mmc0_cmd");
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+}
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+
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+static unsigned long mxs_mmc_setclock_ssp0(unsigned long hz)
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+{
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+ struct clk *ssp = clk_get(NULL, "ssp.0"), *parent;
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+ if (hz > 1000000)
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+ parent = clk_get(NULL, "ref_io.0");
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+ else
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+ parent = clk_get(NULL, "xtal.0");
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+
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+ clk_set_parent(ssp, parent);
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+ clk_set_rate(ssp, 2 * hz);
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+ clk_put(parent);
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+ clk_put(ssp);
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+
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+ return hz;
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+}
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+
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+static struct mxs_mmc_platform_data mmc0_data = {
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+ .hw_init = mxs_mmc_hw_init_ssp0,
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+ .hw_release = mxs_mmc_hw_release_ssp0,
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+ .get_wp = NULL,
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+ .cmd_pullup = mxs_mmc_cmd_pullup_ssp0,
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+ .setclock = mxs_mmc_setclock_ssp0,
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+ .caps = MMC_CAP_4_BIT_DATA
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+ | MMC_CAP_DATA_DDR,
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+ .min_clk = 400000,
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+ .max_clk = 48000000,
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+ .read_uA = 50000,
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+ .write_uA = 70000,
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+ .clock_mmc = "ssp.0",
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+ .power_mmc = NULL,
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+};
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+
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+static struct resource mmc0_resource[] = {
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+ {
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+ .flags = IORESOURCE_MEM,
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+ .start = SSP0_PHYS_ADDR,
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+ .end = SSP0_PHYS_ADDR + 0x2000 - 1,
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+ },
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+ {
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+ .flags = IORESOURCE_DMA,
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+ .start = MXS_DMA_CHANNEL_AHB_APBH_SSP0,
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+ .end = MXS_DMA_CHANNEL_AHB_APBH_SSP0,
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+ },
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+ {
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+ .flags = IORESOURCE_IRQ,
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+ .start = IRQ_SSP0_DMA,
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+ .end = IRQ_SSP0_DMA,
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+ },
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+ {
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+ .flags = IORESOURCE_IRQ,
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+ .start = IRQ_SSP0,
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+ .end = IRQ_SSP0,
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+ },
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+};
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+
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+static void __init mx28_init_mmc(void)
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+{
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+ struct platform_device *pdev;
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+
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+ if (mxs_get_type(PINID_SSP0_CMD) == PIN_FUN1) {
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+ pdev = mxs_get_device("mxs-mmc", 0);
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+ if (pdev == NULL || IS_ERR(pdev))
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+ return;
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+ pdev->resource = mmc0_resource;
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+ pdev->num_resources = ARRAY_SIZE(mmc0_resource);
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+ pdev->dev.platform_data = &mmc0_data;
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+ mxs_add_device(pdev, 0);
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+ }
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+}
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#elif defined(CONFIG_MACH_CCARDIMX28JS)
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#define MMC2_POWER MXS_PIN_TO_GPIO(PINID_SSP2_MISO)
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#define MMC2_WP /* This is the Wi-Fi interface so there is no write protect*/
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