diff mbox

[9/9,v3] mmc: tmio: add actual clock support as option

Message ID 87y4uds23i.wl%kuninori.morimoto.gx@gmail.com (mailing list archive)
State Awaiting Upstream
Headers show

Commit Message

Kuninori Morimoto Aug. 25, 2014, 3:03 a.m. UTC 
From: Shinobu Uehara <shinobu.uehara.xc@renesas.com>

Some controller is supporting actual clock on SD_CLK_CTRL :: DIV[7:0].
Renesas SH-Mobile SDHI doesn't support,
but, Renesas R-Car SDHI supports it.
This patch adds new TMIO_MMC_CLK_ACTUAL flag for it.

[Kuninori Morimoto: tidyuped for upstreaming]

Tested-by: Nguyen Xuan Nui <nx-nui@jinso.co.jp>
Tested-by: Hiep Cao Minh <cm-hiep@jinso.co.jp>
Signed-off-by: Shinobu Uehara <shinobu.uehara.xc@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
v2 -> v3

 - no change

 drivers/mmc/host/sh_mobile_sdhi.c |    6 ++++--
 drivers/mmc/host/tmio_mmc_pio.c   |    5 +++++
 include/linux/mfd/tmio.h          |    5 +++++
 3 files changed, 14 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index cd54ca8..e55f761 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -49,12 +49,14 @@  static const struct sh_mobile_sdhi_of_data sh_mobile_sdhi_of_cfg[] = {
 };
 
 static const struct sh_mobile_sdhi_of_data of_rcar_gen1_compatible = {
-	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE,
+	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
+			  TMIO_MMC_CLK_ACTUAL,
 	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
 };
 
 static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = {
-	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE,
+	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
+			  TMIO_MMC_CLK_ACTUAL,
 	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
 	.capabilities2	= MMC_CAP2_NO_MULTI_READ,
 	.dma_rx_offset	= 0x2000,
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 1c5a631..895e713 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -150,6 +150,11 @@  static void tmio_mmc_set_clock(struct tmio_mmc_host *host, int new_clock)
 		for (clock = host->mmc->f_min, clk = 0x80000080;
 			new_clock >= (clock<<1); clk >>= 1)
 			clock <<= 1;
+
+		/* 1/1 clock is option */
+		if ((host->pdata->flags & TMIO_MMC_CLK_ACTUAL) &&
+		    ((clk >> 22) & 0x1))
+			clk |= 0xff;
 	}
 
 	if (host->set_clk_div)
diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
index adcb0cd..90436d5 100644
--- a/include/linux/mfd/tmio.h
+++ b/include/linux/mfd/tmio.h
@@ -99,6 +99,11 @@ 
  */
 #define TMIO_MMC_HAVE_CTL_DMA_REG	(1 << 9)
 
+/*
+ * Some controllers allows to set SDx actual clock
+ */
+#define TMIO_MMC_CLK_ACTUAL		(1 << 10)
+
 int tmio_core_mmc_enable(void __iomem *cnf, int shift, unsigned long base);
 int tmio_core_mmc_resume(void __iomem *cnf, int shift, unsigned long base);
 void tmio_core_mmc_pwr(void __iomem *cnf, int shift, int state);