mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-27 17:18:59 +00:00
47 lines
1.7 KiB
Diff
47 lines
1.7 KiB
Diff
From 5ee0de9d7abd644d4cb678fe26ac5130a1a8075f Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.org>
|
|
Date: Fri, 2 Aug 2019 15:20:11 +0100
|
|
Subject: [PATCH] mmc: sdhci-iproc: Fix vmmc regulators on iProc
|
|
|
|
The Linux support for controlling card power via regulators appears to
|
|
be contentious. I would argue that the default behaviour is contrary to
|
|
the SDHCI spec - turning off the power writes a reserved value to the
|
|
SD Bus Voltage Select field of the Power Control Register, which
|
|
seems to kill the Arasan/iProc controller - but fortunately there is a
|
|
hook in sdhci_ops to override the behaviour. Borrow the implementation
|
|
from sdhci_arasan_set_power.
|
|
|
|
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
|
|
---
|
|
drivers/mmc/host/sdhci-iproc.c | 12 ++++++++++++
|
|
1 file changed, 12 insertions(+)
|
|
|
|
--- a/drivers/mmc/host/sdhci-iproc.c
|
|
+++ b/drivers/mmc/host/sdhci-iproc.c
|
|
@@ -162,6 +162,17 @@ static void sdhci_iproc_writeb(struct sd
|
|
sdhci_iproc_writel(host, newval, reg & ~3);
|
|
}
|
|
|
|
+static void sdhci_iproc_set_power(struct sdhci_host *host, unsigned char mode,
|
|
+ unsigned short vdd)
|
|
+{
|
|
+ if (!IS_ERR(host->mmc->supply.vmmc)) {
|
|
+ struct mmc_host *mmc = host->mmc;
|
|
+
|
|
+ mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
|
|
+ }
|
|
+ sdhci_set_power_noreg(host, mode, vdd);
|
|
+}
|
|
+
|
|
static const struct sdhci_ops sdhci_iproc_ops = {
|
|
.set_clock = sdhci_set_clock,
|
|
.get_max_clock = sdhci_pltfm_clk_get_max_clock,
|
|
@@ -178,6 +189,7 @@ static const struct sdhci_ops sdhci_ipro
|
|
.write_w = sdhci_iproc_writew,
|
|
.write_b = sdhci_iproc_writeb,
|
|
.set_clock = sdhci_set_clock,
|
|
+ .set_power = sdhci_iproc_set_power,
|
|
.get_max_clock = sdhci_pltfm_clk_get_max_clock,
|
|
.set_bus_width = sdhci_set_bus_width,
|
|
.reset = sdhci_reset,
|