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From:   Christophe Leroy <christophe.leroy@c-s.fr>
Subject: [PATCH v2 09/10] powerpc/8xx: Use IO accessors in microcode
 programming.
To:     Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>,
        Michael Ellerman <mpe@ellerman.id.au>, oss@buserror.net
Cc:     linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Date:   Thu, 13 Jun 2019 09:12:01 +0000 (UTC)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Change microcode functions to use IO accessors and get rid
of volatile attributes.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/platforms/8xx/micropatch.c | 34 ++++++++++++++++-----------------
 1 file changed, 16 insertions(+), 18 deletions(-)

diff --git a/arch/powerpc/platforms/8xx/micropatch.c b/arch/powerpc/platforms/8xx/micropatch.c
index 252db7c90599..986aa6978ab7 100644
--- a/arch/powerpc/platforms/8xx/micropatch.c
+++ b/arch/powerpc/platforms/8xx/micropatch.c
@@ -242,13 +242,7 @@ static void __init cpm_write_patch(cpm8xx_t *cp, int offset, uint *patch, int le
 
 void __init cpm_load_patch(cpm8xx_t *cp)
 {
-	volatile cpm8xx_t	*commproc;
-	volatile iic_t		*iip;
-	volatile struct spi_pram *spp;
-	volatile smc_uart_t	*smp;
-	commproc = cp;
-
-	commproc->cp_rccr = 0;
+	out_be16(&cp->cp_rccr, 0);
 
 	cpm_write_patch(cp, 0, patch_2000, sizeof(patch_2000));
 	cpm_write_patch(cp, 0xf00, patch_2f00, sizeof(patch_2f00));
@@ -257,26 +251,30 @@ void __init cpm_load_patch(cpm8xx_t *cp)
 	if (IS_ENABLED(CONFIG_I2C_SPI_UCODE_PATCH) ||
 	    IS_ENABLED(CONFIG_I2C_SPI_SMC1_UCODE_PATCH)) {
 		u16 rpbase = 0x500;
+		iic_t *iip;
+		struct spi_pram *spp;
 
-		iip = (iic_t *)&commproc->cp_dparam[PROFF_IIC];
-		iip->iic_rpbase = rpbase;
+		iip = (iic_t *)&cp->cp_dparam[PROFF_IIC];
+		out_be16(&iip->iic_rpbase, rpbase);
 
 		/* Put SPI above the IIC, also 32-byte aligned. */
-		spp = (struct spi_pram *)&commproc->cp_dparam[PROFF_SPI];
-		spp->rpbase = (rpbase + sizeof(iic_t) + 31) & ~31;
+		spp = (struct spi_pram *)&cp->cp_dparam[PROFF_SPI];
+		out_be16(&spp->rpbase, (rpbase + sizeof(iic_t) + 31) & ~31);
 
 		if (IS_ENABLED(CONFIG_I2C_SPI_SMC1_UCODE_PATCH)) {
-			smp = (smc_uart_t *)&commproc->cp_dparam[PROFF_SMC1];
-			smp->smc_rpbase = 0x1FC0;
+			smc_uart_t *smp;
+
+			smp = (smc_uart_t *)&cp->cp_dparam[PROFF_SMC1];
+			out_be16(&smp->smc_rpbase, 0x1FC0);
 		}
 	}
 
-	commproc->cp_cpmcr1 = patch_params.cpmcr1;
-	commproc->cp_cpmcr2 = patch_params.cpmcr2;
-	commproc->cp_cpmcr3 = patch_params.cpmcr3;
-	commproc->cp_cpmcr4 = patch_params.cpmcr4;
+	out_be16(&cp->cp_cpmcr1, patch_params.cpmcr1);
+	out_be16(&cp->cp_cpmcr2, patch_params.cpmcr2);
+	out_be16(&cp->cp_cpmcr3, patch_params.cpmcr3);
+	out_be16(&cp->cp_cpmcr4, patch_params.cpmcr4);
 
-	commproc->cp_rccr = patch_params.rccr;
+	out_be16(&cp->cp_rccr, patch_params.rccr);
 
 	pr_info("%s microcode patch installed\n", patch_name);
 }
-- 
2.13.3