linux-kernel - [PATCH v1 2/2] mmc: sdhci-of-arasan: Add Support for Intel LGM eMMC

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Date:   Mon, 26 Aug 2019 15:28:00 +0800
From:   "Ramuthevar,Vadivel MuruganX" 
        <vadivel.muruganx.ramuthevar@...ux.intel.com>
To:     linux-mmc@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        devicetree@...r.kernel.org, adrian.hunter@...el.com,
        ulf.hansson@...aro.org, michal.simek@...inx.com,
        robh+dt@...nel.org, mark.rutland@....com,
        andriy.shevchenko@...el.com, cheol.yong.kim@...el.com,
        qi-ming.wu@...el.com,
        Ramuthevar Vadivel Muruganx 
        <vadivel.muruganx.ramuthevar@...ux.intel.com>
Subject: [PATCH v1 2/2] mmc: sdhci-of-arasan: Add Support for Intel LGM eMMC

From: Ramuthevar Vadivel Muruganx <vadivel.muruganx.ramuthevar@...ux.intel.com>

The current arasan sdhci PHY configuration isn't compatible
with the PHY on Intel's LGM(Lightning Mountain) SoC devices.

Therefore, add a new compatible, to adapt the Intel's LGM
eMMC PHY with arasan-sdhc controller to configure the PHY.

Signed-off-by: Ramuthevar Vadivel Muruganx <vadivel.muruganx.ramuthevar@...ux.intel.com>
---
 drivers/mmc/host/sdhci-of-arasan.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c
index b12abf9b15f2..7023cbec4017 100644
--- a/drivers/mmc/host/sdhci-of-arasan.c
+++ b/drivers/mmc/host/sdhci-of-arasan.c
@@ -114,6 +114,12 @@ static const struct sdhci_arasan_soc_ctl_map rk3399_soc_ctl_map = {
 	.hiword_update = true,
 };
 
+static const struct sdhci_arasan_soc_ctl_map intel_lgm_emmc_soc_ctl_map = {
+	.baseclkfreq = { .reg = 0xa0, .width = 8, .shift = 2 },
+	.clockmultiplier = { .reg = 0, .width = -1, .shift = -1 },
+	.hiword_update = false,
+};
+
 /**
  * sdhci_arasan_syscon_write - Write to a field in soc_ctl registers
  *
@@ -373,6 +379,11 @@ static struct sdhci_arasan_of_data sdhci_arasan_rk3399_data = {
 	.pdata = &sdhci_arasan_cqe_pdata,
 };
 
+static struct sdhci_arasan_of_data intel_lgm_emmc_data = {
+	.soc_ctl_map = &intel_lgm_emmc_soc_ctl_map,
+	.pdata = &sdhci_arasan_cqe_pdata,
+};
+
 #ifdef CONFIG_PM_SLEEP
 /**
  * sdhci_arasan_suspend - Suspend method for the driver
@@ -474,6 +485,10 @@ static const struct of_device_id sdhci_arasan_of_match[] = {
 		.compatible = "rockchip,rk3399-sdhci-5.1",
 		.data = &sdhci_arasan_rk3399_data,
 	},
+	{
+		.compatible = "intel,lgm-sdhci-5.1-emmc",
+		.data = &intel_lgm_emmc_data,
+	},
 	/* Generic compatible below here */
 	{
 		.compatible = "arasan,sdhci-8.9a",
-- 
2.11.0