From: Zhou Yanjie <zhouyanjie@zoho.com>
To: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org,
devicetree@vger.kernel.org, robh+dt@kernel.org,
paul.burton@mips.com, mark.rutland@arm.com, syq@debian.org,
ulf.hansson@linaro.org, linus.walleij@linaro.org,
armijn@tjaldur.nl, tglx@linutronix.de, yuehaibing@huawei.com,
malat@debian.org, ezequiel@collabora.com, paul@crapouillou.net
Subject: [PATCH 6/6 v2] MMC: JZ4740: Add support for LPM.
Date: Sat, 12 Oct 2019 13:13:20 +0800 [thread overview]
Message-ID: <1570857203-49192-7-git-send-email-zhouyanjie@zoho.com> (raw)
In-Reply-To: <1570857203-49192-1-git-send-email-zhouyanjie@zoho.com>
add support for low power mode of Ingenic's MMC/SD Controller.
Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
---
drivers/mmc/host/jz4740_mmc.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/drivers/mmc/host/jz4740_mmc.c b/drivers/mmc/host/jz4740_mmc.c
index 44a04fe..4cbe7fb 100644
--- a/drivers/mmc/host/jz4740_mmc.c
+++ b/drivers/mmc/host/jz4740_mmc.c
@@ -43,6 +43,7 @@
#define JZ_REG_MMC_RESP_FIFO 0x34
#define JZ_REG_MMC_RXFIFO 0x38
#define JZ_REG_MMC_TXFIFO 0x3C
+#define JZ_REG_MMC_LPM 0x40
#define JZ_REG_MMC_DMAC 0x44
#define JZ_MMC_STRPCL_EXIT_MULTIPLE BIT(7)
@@ -102,6 +103,12 @@
#define JZ_MMC_DMAC_DMA_SEL BIT(1)
#define JZ_MMC_DMAC_DMA_EN BIT(0)
+#define JZ_MMC_LPM_DRV_RISING BIT(31)
+#define JZ_MMC_LPM_DRV_RISING_QTR_PHASE_DLY BIT(31)
+#define JZ_MMC_LPM_DRV_RISING_1NS_DLY BIT(30)
+#define JZ_MMC_LPM_SMP_RISING_QTR_OR_HALF_PHASE_DLY BIT(29)
+#define JZ_MMC_LPM_LOW_POWER_MODE_EN BIT(0)
+
#define JZ_MMC_CLK_RATE 24000000
enum jz4740_mmc_version {
@@ -860,6 +867,22 @@ static int jz4740_mmc_set_clock_rate(struct jz4740_mmc_host *host, int rate)
}
writew(div, host->base + JZ_REG_MMC_CLKRT);
+
+ if (real_rate > 25000000) {
+ if (host->version >= JZ_MMC_X1000) {
+ writel(JZ_MMC_LPM_DRV_RISING_QTR_PHASE_DLY |
+ JZ_MMC_LPM_SMP_RISING_QTR_OR_HALF_PHASE_DLY |
+ JZ_MMC_LPM_LOW_POWER_MODE_EN,
+ host->base + JZ_REG_MMC_LPM);
+ } else if (host->version >= JZ_MMC_JZ4760) {
+ writel(JZ_MMC_LPM_DRV_RISING |
+ JZ_MMC_LPM_LOW_POWER_MODE_EN,
+ host->base + JZ_REG_MMC_LPM);
+ } else if (host->version >= JZ_MMC_JZ4725B)
+ writel(JZ_MMC_LPM_LOW_POWER_MODE_EN,
+ host->base + JZ_REG_MMC_LPM);
+ }
+
return real_rate;
}
--
2.7.4
next prev parent reply other threads:[~2019-10-12 5:19 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-05 7:38 MMC: Ingenic: Add support for 8bit mode and LPM and JZ4760 Soc Zhou Yanjie
2019-09-05 7:38 ` [PATCH 1/4] MMC: Ingenic: Adjust the macro definition name Zhou Yanjie
2019-09-13 15:32 ` Ezequiel Garcia
2019-09-13 15:59 ` Zhou Yanjie
2019-09-05 7:38 ` [PATCH 2/4] MMC: Ingenic: Add 8bit mode support Zhou Yanjie
2019-09-05 7:38 ` [PATCH 3/4] dt-bindings: MMC: Add JZ4760 bindings Zhou Yanjie
2019-09-13 14:36 ` Rob Herring
2019-09-05 7:38 ` [PATCH 4/4] MMC: Ingenic: Add support for JZ4760 and support for LPM Zhou Yanjie
2019-10-03 10:00 ` Ulf Hansson
2019-10-06 5:58 ` Zhou Yanjie
2019-10-12 5:13 ` MMC: JZ4740: Add support for 8bit mode and LPM and JZ4760 Soc v2 Zhou Yanjie
2019-10-12 5:13 ` [PATCH 1/6 v2] MMC: Ingenic: Add 8bit mode support Zhou Yanjie
2019-10-12 5:13 ` [PATCH 2/6 v2] dt-bindings: MMC: Add JZ4760 bindings Zhou Yanjie
2019-10-12 5:13 ` [PATCH 3/6 v2] MMC: JZ4740: Add support for the JZ4760 Zhou Yanjie
2019-10-12 5:13 ` [PATCH 4/6 v2] dt-bindings: MMC: Add X1000 bindings Zhou Yanjie
2019-10-14 18:15 ` Rob Herring
2019-10-12 5:13 ` [PATCH 5/6 v2] MMC: JZ4740: Add support for the X1000 Zhou Yanjie
2019-10-12 5:13 ` Zhou Yanjie [this message]
2019-10-18 8:52 ` [PATCH 6/6 v2] MMC: JZ4740: Add support for LPM Ulf Hansson
2019-10-18 15:37 ` Paul Cercueil
2019-10-18 16:54 ` Zhou Yanjie
2019-10-19 20:44 ` Ezequiel Garcia
2019-10-21 14:57 ` Ulf Hansson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1570857203-49192-7-git-send-email-zhouyanjie@zoho.com \
--to=zhouyanjie@zoho.com \
--cc=armijn@tjaldur.nl \
--cc=devicetree@vger.kernel.org \
--cc=ezequiel@collabora.com \
--cc=linus.walleij@linaro.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mips@vger.kernel.org \
--cc=linux-mmc@vger.kernel.org \
--cc=malat@debian.org \
--cc=mark.rutland@arm.com \
--cc=paul.burton@mips.com \
--cc=paul@crapouillou.net \
--cc=robh+dt@kernel.org \
--cc=syq@debian.org \
--cc=tglx@linutronix.de \
--cc=ulf.hansson@linaro.org \
--cc=yuehaibing@huawei.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).