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Commit e539649f authored by Sahitya Tummala's avatar Sahitya Tummala
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mmc: sdhci-msm: parse and configure TLMM iomem resource 



Some host controllers may need additional TLMM registers to be
configured to enable the IO lines connected to it.

Change-Id: Ic334ce653bf13fef5969f08e19f6202377b8fd2e
Signed-off-by: default avatarSahitya Tummala <stummala@codeaurora.org>
parent 049b7256

Documentation/devicetree/bindings/mmc/sdhci-msm.txt

+1 −0
Original line number Diff line number Diff line
@@ -7,6 +7,7 @@ Required properties: 
  - reg : should contain SDHC, SD Core register map.

  - reg-names : indicates various resources passed to driver (via reg proptery) by name.

		Required "reg-names" are "hc_mem" and "core_mem"

		optional ones are "tlmm_mem"

  - interrupts : should contain SDHC interrupts.

  - interrupt-names : indicates interrupts passed to driver (via interrupts property) by name.

		      Required "interrupt-names" are "hc_irq" and "pwr_irq".

drivers/mmc/host/sdhci-msm.c

+18 −0
Original line number Diff line number Diff line
@@ -3804,6 +3804,8 @@ static int sdhci_msm_probe(struct platform_device *pdev) 
	int ret = 0, dead = 0;

	u16 host_version;

	u32 irq_status, irq_ctl;

	struct resource *tlmm_memres = NULL;

	void __iomem *tlmm_mem;



	pr_debug("%s: Enter %s\n", dev_name(&pdev->dev), __func__);

	msm_host = devm_kzalloc(&pdev->dev, sizeof(struct sdhci_msm_host),
@@ -4001,6 +4003,22 @@ static int sdhci_msm_probe(struct platform_device *pdev) 
		goto vreg_deinit;

	}



	tlmm_memres = platform_get_resource_byname(pdev,

				IORESOURCE_MEM, "tlmm_mem");

	if (tlmm_memres) {

		tlmm_mem = devm_ioremap(&pdev->dev, tlmm_memres->start,

						resource_size(tlmm_memres));



		if (!tlmm_mem) {

			dev_err(&pdev->dev, "Failed to remap tlmm registers\n");

			ret = -ENOMEM;

			goto vreg_deinit;

		}

		writel_relaxed(readl_relaxed(tlmm_mem) | 0x2, tlmm_mem);

		dev_dbg(&pdev->dev, "tlmm reg %pa value 0x%08x\n",

				&tlmm_memres->start, readl_relaxed(tlmm_mem));

	}



	/*

	 * Reset the vendor spec register to power on reset state.

	 */