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can: flexcan: Use a regulator to control the CAN transceiver

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Instead of using a GPIO to turn on/off the CAN transceiver, it is better to
use a regulator as some systems may use a PMIC to power the CAN transceiver.

Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Dieser Commit ist enthalten in:
Fabio Estevam
2013-06-10 23:12:57 -03:00
committet von Marc Kleine-Budde
Ursprung 30caa4b763
Commit b7c4114b07
4 geänderte Dateien mit 28 neuen und 61 gelöschten Zeilen
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50
arch/arm/mach-mxs/mach-mxs.c
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@@ -14,7 +14,6 @@
#include <linux/clk/mxs.h>
#include <linux/clkdev.h>
#include <linux/clocksource.h>
#include <linux/can/platform/flexcan.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio.h>
@@ -60,41 +59,6 @@ static inline void __mxs_togl(u32 mask, void __iomem *reg)
__raw_writel(mask, reg + MXS_TOG_ADDR);
}
/*
* MX28EVK_FLEXCAN_SWITCH is shared between both flexcan controllers
*/
#define MX28EVK_FLEXCAN_SWITCH MXS_GPIO_NR(2, 13)
static int flexcan0_en, flexcan1_en;
static void mx28evk_flexcan_switch(void)
{
if (flexcan0_en || flexcan1_en)
gpio_set_value(MX28EVK_FLEXCAN_SWITCH, 1);
else
gpio_set_value(MX28EVK_FLEXCAN_SWITCH, 0);
}
static void mx28evk_flexcan0_switch(int enable)
{
flexcan0_en = enable;
mx28evk_flexcan_switch();
}
static void mx28evk_flexcan1_switch(int enable)
{
flexcan1_en = enable;
mx28evk_flexcan_switch();
}
static struct flexcan_platform_data flexcan_pdata[2];
static struct of_dev_auxdata mxs_auxdata_lookup[] __initdata = {
OF_DEV_AUXDATA("fsl,imx28-flexcan", 0x80032000, NULL, &flexcan_pdata[0]),
OF_DEV_AUXDATA("fsl,imx28-flexcan", 0x80034000, NULL, &flexcan_pdata[1]),
{ /* sentinel */ }
};
#define OCOTP_WORD_OFFSET 0x20
#define OCOTP_WORD_COUNT 0x20
@@ -254,15 +218,6 @@ static void __init imx28_evk_init(void)
mxs_saif_clkmux_select(MXS_DIGCTL_SAIF_CLKMUX_EXTMSTR0);
}
static void __init imx28_evk_post_init(void)
{
if (!gpio_request_one(MX28EVK_FLEXCAN_SWITCH, GPIOF_DIR_OUT,
"flexcan-switch")) {
flexcan_pdata[0].transceiver_switch = mx28evk_flexcan0_switch;
flexcan_pdata[1].transceiver_switch = mx28evk_flexcan1_switch;
}
}
static int apx4devkit_phy_fixup(struct phy_device *phy)
{
phy->dev_flags |= MICREL_PHY_50MHZ_CLK;
@@ -374,13 +329,10 @@ static void __init mxs_machine_init(void)
cfa10049_init();
of_platform_populate(NULL, of_default_bus_match_table,
mxs_auxdata_lookup, NULL);
NULL, NULL);
if (of_machine_is_compatible("karo,tx28"))
tx28_post_init();
if (of_machine_is_compatible("fsl,imx28-evk"))
imx28_evk_post_init();
}
#define MX23_CLKCTRL_RESET_OFFSET 0x120