From 0f1411bc8dade4472ca802f46f75714e67301bb0 Mon Sep 17 00:00:00 2001 From: Fabio Estevam Date: Tue, 9 Apr 2013 13:06:25 +0000 Subject: spi: mxc_spi: Set master mode for all channels The glitch in the SPI clock line, which commit 3cea335c34 (spi: mxc_spi: Fix spi clock glitch durant reset) solved, is back now and itwas re-introduced by commit d36b39bf0d (spi: mxc_spi: Fix ECSPI reset handling). Actually the glitch is happening due to always toggling between slave mode and master mode by configuring the CHANNEL_MODE bits in this reset function. Since the spi driver only supports master mode, set the mode for all channels always to master mode in order to have a stable, "glitch-free" SPI clock line. Signed-off-by: Fabio Estevam --- arch/arm/include/asm/arch-mx5/imx-regs.h | 1 + arch/arm/include/asm/arch-mx6/imx-regs.h | 1 + 2 files changed, 2 insertions(+) (limited to 'arch/arm') diff --git a/arch/arm/include/asm/arch-mx5/imx-regs.h b/arch/arm/include/asm/arch-mx5/imx-regs.h index 249d15a505..a71cc13e2a 100644 --- a/arch/arm/include/asm/arch-mx5/imx-regs.h +++ b/arch/arm/include/asm/arch-mx5/imx-regs.h @@ -230,6 +230,7 @@ #define MXC_CSPICTRL_EN (1 << 0) #define MXC_CSPICTRL_MODE (1 << 1) #define MXC_CSPICTRL_XCH (1 << 2) +#define MXC_CSPICTRL_MODE_MASK (0xf << 4) #define MXC_CSPICTRL_CHIPSELECT(x) (((x) & 0x3) << 12) #define MXC_CSPICTRL_BITCOUNT(x) (((x) & 0xfff) << 20) #define MXC_CSPICTRL_PREDIV(x) (((x) & 0xF) << 12) diff --git a/arch/arm/include/asm/arch-mx6/imx-regs.h b/arch/arm/include/asm/arch-mx6/imx-regs.h index eaa7439486..d79ab2f13f 100644 --- a/arch/arm/include/asm/arch-mx6/imx-regs.h +++ b/arch/arm/include/asm/arch-mx6/imx-regs.h @@ -346,6 +346,7 @@ struct cspi_regs { #define MXC_CSPICTRL_EN (1 << 0) #define MXC_CSPICTRL_MODE (1 << 1) #define MXC_CSPICTRL_XCH (1 << 2) +#define MXC_CSPICTRL_MODE_MASK (0xf << 4) #define MXC_CSPICTRL_CHIPSELECT(x) (((x) & 0x3) << 12) #define MXC_CSPICTRL_BITCOUNT(x) (((x) & 0xfff) << 20) #define MXC_CSPICTRL_PREDIV(x) (((x) & 0xF) << 12) -- cgit