linux-kernel - [PATCH RESEND 1/2] clk: imx: Add common API for masking MMDC handshake

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Sun, 12 May 2019 10:24:12 +0000
From:   Anson Huang <anson.huang@....com>
To:     "mturquette@...libre.com" <mturquette@...libre.com>,
        "sboyd@...nel.org" <sboyd@...nel.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        "l.stach@...gutronix.de" <l.stach@...gutronix.de>,
        Aisheng Dong <aisheng.dong@....com>,
        "tiny.windzz@...il.com" <tiny.windzz@...il.com>,
        "pp@...ix.com" <pp@...ix.com>,
        "colin.didier@...ialet.com" <colin.didier@...ialet.com>,
        "robh@...nel.org" <robh@...nel.org>, Jacky Bai <ping.bai@....com>,
        Leonard Crestez <leonard.crestez@....com>,
        "hofrat@...dl.org" <hofrat@...dl.org>,
        "michael@...rulasolutions.com" <michael@...rulasolutions.com>,
        "stefan@...er.ch" <stefan@...er.ch>, Abel Vesa <abel.vesa@....com>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     dl-linux-imx <linux-imx@....com>
Subject: [PATCH RESEND 1/2] clk: imx: Add common API for masking MMDC
 handshake

All i.MX6 SoCs need to mask unused MMDC channel's handshake
for low power modes, this patch provides common API for masking
the MMDC channel passed from caller.

Signed-off-by: Anson Huang <Anson.Huang@....com>
Reviewed-by: Dong Aisheng <aisheng.dong@....com>
---
No change, just resend patch with correct encoding.
---
 drivers/clk/imx/clk.c | 14 ++++++++++++++
 drivers/clk/imx/clk.h |  1 +
 2 files changed, 15 insertions(+)

diff --git a/drivers/clk/imx/clk.c b/drivers/clk/imx/clk.c
index 1efed86..6f9bcee 100644
--- a/drivers/clk/imx/clk.c
+++ b/drivers/clk/imx/clk.c
@@ -6,8 +6,22 @@
 #include <linux/spinlock.h>
 #include "clk.h"
 
+#define CCM_CCDR			0x4
+#define CCDR_MMDC_CH0_MASK		BIT(17)
+#define CCDR_MMDC_CH1_MASK		BIT(16)
+
 DEFINE_SPINLOCK(imx_ccm_lock);
 
+void __init imx_mmdc_mask_handshake(void __iomem *ccm_base,
+				    unsigned int chn)
+{
+	unsigned int reg;
+
+	reg = readl_relaxed(ccm_base + CCM_CCDR);
+	reg |= chn == 0 ? CCDR_MMDC_CH0_MASK : CCDR_MMDC_CH1_MASK;
+	writel_relaxed(reg, ccm_base + CCM_CCDR);
+}
+
 void __init imx_check_clocks(struct clk *clks[], unsigned int count)
 {
 	unsigned i;
diff --git a/drivers/clk/imx/clk.h b/drivers/clk/imx/clk.h
index 8639a8f..6dcdc91 100644
--- a/drivers/clk/imx/clk.h
+++ b/drivers/clk/imx/clk.h
@@ -10,6 +10,7 @@ extern spinlock_t imx_ccm_lock;
 void imx_check_clocks(struct clk *clks[], unsigned int count);
 void imx_check_clk_hws(struct clk_hw *clks[], unsigned int count);
 void imx_register_uart_clocks(struct clk ** const clks[]);
+void imx_mmdc_mask_handshake(void __iomem *ccm_base, unsigned int chn);
 
 extern void imx_cscmr1_fixup(u32 *val);
 
-- 
2.7.4