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rcar_gen3: drivers: rpc: Change RPC PHY calibration setting 

Modify RPC code according to Errata of Hardware User's Manual

Signed-off-by: Toshiyuki Ogasahara <toshiyuki.ogasahara.bo@hitachi.com>
Signed-off-by: Yoshifumi Hosoya <yoshifumi.hosoya.wj@renesas.com>
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Change-Id: I82d0a2136c7f18870842f84c49343977708eef1e
This commit is contained in:
Toshiyuki Ogasahara 2019-05-20 11:23:48 +09:00 committed by Marek Vasut
parent 783c5304b2
commit a3aa877c9e
1 changed files with 23 additions and 2 deletions
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25
drivers/renesas/rcar/rpc/rpc_driver.c
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2015-2018, Renesas Electronics Corporation. All rights reserved.
* Copyright (c) 2015-2019, Renesas Electronics Corporation. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@ -11,11 +11,15 @@
#include <lib/mmio.h>
#include "cpg_registers.h"
#include "rpc_registers.h"
#include "rcar_def.h"
#include "rcar_private.h"
#include "rpc_registers.h"
#define MSTPSR9_RPC_BIT (0x00020000U)
#define RPC_CMNCR_MD_BIT (0x80000000U)
#define RPC_PHYCNT_CAL BIT(31)
#define RPC_PHYCNT_STRTIM_M3V1 (0x6 << 15UL)
#define RPC_PHYCNT_STRTIM (0x7 << 15UL)
static void rpc_enable(void)
{
@ -25,8 +29,25 @@ static void rpc_enable(void)
static void rpc_setup(void)
{
uint32_t product, cut, reg, phy_strtim;
if (mmio_read_32(RPC_CMNCR) & RPC_CMNCR_MD_BIT)
mmio_clrbits_32(RPC_CMNCR, RPC_CMNCR_MD_BIT);
product = mmio_read_32(RCAR_PRR) & RCAR_PRODUCT_MASK;
cut = mmio_read_32(RCAR_PRR) & RCAR_CUT_MASK;
if ((product == RCAR_PRODUCT_M3) && (cut < RCAR_CUT_VER30))
phy_strtim = RPC_PHYCNT_STRTIM_M3V1;
else
phy_strtim = RPC_PHYCNT_STRTIM;
reg = mmio_read_32(RPC_PHYCNT);
reg &= ~RPC_PHYCNT_STRTIM;
reg |= phy_strtim;
mmio_write_32(RPC_PHYCNT, reg);
reg |= RPC_PHYCNT_CAL;
mmio_write_32(RPC_PHYCNT, reg);
}
void rcar_rpc_init(void)