From: Wolfram Sang <wsa@the-dreams.de>
To: linux-mmc@vger.kernel.org
Cc: Wolfram Sang <wsa@the-dreams.de>,
linux-renesas-soc@vger.kernel.org,
Geert Uytterhoeven <geert@linux-m68k.org>,
Ulf Hansson <ulf.hansson@linaro.org>
Subject: [RFC 2/4] mmc: tmio/sdhi: introduce flag for RCar 2+ specific features
Date: Mon, 2 May 2016 22:25:40 +0200 [thread overview]
Message-ID: <1462220742-4426-3-git-send-email-wsa@the-dreams.de> (raw)
In-Reply-To: <1462220742-4426-1-git-send-email-wsa@the-dreams.de>
From: Wolfram Sang <wsa+renesas@sang-engineering.com>
RCar Gen2 and later implementations of TMIO/SDHI have their own set of
features and additions. FAST_CLK_CHG is just one of them and I see a few
others being added soon. Some may work on older chipsets but this needs
to be tested case by case. Instead of adding a bunch of flags for each
feature, add a global RCar2+ one for now. We can still break out
features if the need arises.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
drivers/mmc/host/sh_mobile_sdhi.c | 4 ++--
drivers/mmc/host/tmio_mmc_pio.c | 6 +++---
include/linux/mfd/tmio.h | 4 ++--
3 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index 6857e4ba724415..19e4c29e4233b0 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -62,7 +62,7 @@ static const struct sh_mobile_sdhi_of_data of_rcar_gen1_compatible = {
static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = {
.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
- TMIO_MMC_CLK_ACTUAL | TMIO_MMC_FAST_CLK_CHG,
+ TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2,
.capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
.dma_buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES,
.dma_rx_offset = 0x2000,
@@ -70,7 +70,7 @@ static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = {
static const struct sh_mobile_sdhi_of_data of_rcar_gen3_compatible = {
.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
- TMIO_MMC_CLK_ACTUAL | TMIO_MMC_FAST_CLK_CHG,
+ TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2,
.capabilities = MMC_CAP_SD_HIGHSPEED,
.bus_shift = 2,
};
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 95f22997f31a66..f44e2ab7aea2ba 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -157,7 +157,7 @@ static void tmio_mmc_clk_start(struct tmio_mmc_host *host)
{
sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN |
sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
- msleep(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG ? 1 : 10);
+ msleep(host->pdata->flags & TMIO_MMC_MIN_RCAR2 ? 1 : 10);
if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) {
sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100);
@@ -174,7 +174,7 @@ static void tmio_mmc_clk_stop(struct tmio_mmc_host *host)
sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
- msleep(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG ? 5 : 10);
+ msleep(host->pdata->flags & TMIO_MMC_MIN_RCAR2 ? 5 : 10);
}
static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
@@ -205,7 +205,7 @@ static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & CLK_CTL_DIV_MASK);
- if (!(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG))
+ if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2))
msleep(10);
tmio_mmc_clk_start(host);
diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
index 05d58ee5e6a78f..7a26286db895c5 100644
--- a/include/linux/mfd/tmio.h
+++ b/include/linux/mfd/tmio.h
@@ -66,8 +66,8 @@
*/
#define TMIO_MMC_SDIO_IRQ (1 << 2)
-/* Some controllers don't need to wait 10ms for clock changes */
-#define TMIO_MMC_FAST_CLK_CHG (1 << 3)
+/* Some features are only available or tested on RCar Gen2 or later */
+#define TMIO_MMC_MIN_RCAR2 (1 << 3)
/*
* Some controllers require waiting for the SD bus to become
--
2.6.2
next prev parent reply other threads:[~2016-05-02 20:25 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-02 20:25 [RFC 0/4] mmc: tmio/sdhi: prevent regressions when setting clock Wolfram Sang
2016-05-02 20:25 ` [RFC 1/4] mmc: sh_mobile_sdhi: make clk_update function more compact Wolfram Sang
2016-05-02 20:25 ` Wolfram Sang [this message]
2016-05-02 20:25 ` [RFC 3/4] mmc: sh_mobile_sdhi: only change the clock on RCar Gen2+ Wolfram Sang
2016-05-02 20:25 ` [RFC 4/4] mmc: sh_mobile_sdhi: check return value when changing clk Wolfram Sang
2016-05-03 7:30 ` [RFC 0/4] mmc: tmio/sdhi: prevent regressions when setting clock Geert Uytterhoeven
2016-05-03 8:49 ` Ulf Hansson
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